Lead Power Electronics Engineer - MW-Class Multi-Port Power Conversion
Miami, FLEngineering /Full-Time /On-Site
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Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are looking for a Lead Power Electronics Engineer to lead development of Exowatt’s next-generation MW-class multi-port power conversion solution. This person will own system architecture, product and engineering requirements, partner evaluation, development oversight, validation, and certification readiness for a high-power solution using advanced technologies such as SiC, GaN, and/or Solid State Transformer architectures.
This is a senior technical role for someone who has designed, developed, or brought up power conversion systems at the hundreds-of-kW to MW scale. The ideal candidate has practical experience with high-power converter design, grid-interactive systems, controls integration, protection, thermal and mechanical design, EMI/EMC, safety, and certification.
The person in this role will work closely with product, systems, controls, firmware, mechanical, thermal, manufacturing, supply chain, and external development partners to bring a robust MW-level multi-port solution to certification readiness by Q4 2027.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Key Responsibilities:
Product Definition & Architecture
Lead architecture definition for a MW-class multi-port power conversion system supporting interfaces such as solar, storage, thermal generation, grid, load, and/or DC bus integration
Develop the Product Requirements Document and translate product needs into detailed Engineering Requirements across electrical, thermal, mechanical, controls, firmware, safety, reliability, manufacturability, serviceability, and certification
Evaluate SiC-based, GaN-based, and Solid State Transformer architecture options, including tradeoffs across performance, cost, reliability, scalability, manufacturability, certification complexity, and time-to-market
Define key system requirements, including voltage levels, power ratings, efficiency, isolation, grounding, protection, communications, operating modes, grid behavior, and thermal performance
Build technical roadmaps, risk registers, design review gates, and validation strategies to support the target development timeline
MW-Class Power Electronics Development
Lead technical development of high-power converter architectures, including DC/DC, DC/AC, AC/DC, AC/AC, bidirectional, isolated, modular, and multi-port conversion systems
Guide topology selection and trade studies for architectures such as dual-active-bridge converters, resonant converters, modular multilevel converters, NPC/ANPC topologies, interleaved converters, and medium-frequency transformer-based systems
Drive power stage design decisions, including semiconductor selection, gate drivers, magnetics, DC link design, busbars, sensing, filtering, protection, cooling, packaging, creepage/clearance, and insulation coordination
Review schematics, power layouts, high-power interconnects, thermal designs, safety systems, and controls interfaces
Work with controls and firmware teams to align modulation, protection logic, fault response, communications, diagnostics, and system state machines with system requirements
Partner Evaluation & Joint Development
Identify and evaluate external development partners, including power electronics design firms, OEMs, ODMs, contract manufacturers, labs, universities, and certification partners
Develop technical evaluation criteria for partner selection, including MW-level design experience, SiC/GaN capability, Solid State Transformer experience, controls expertise, manufacturing maturity, certification history, and execution speed
Lead technical due diligence through architecture reviews, capability assessments, reference checks, test data reviews, and risk assessments
Define statements of work, deliverables, milestones, design review gates, validation requirements, and acceptance criteria for joint development programs
Serve as the primary technical owner for external partner execution, ensuring performance, schedule, quality, documentation, and certification requirements are met
Test, Validation & Certification Readiness
Develop system-level test and validation strategies for MW-class power conversion hardware, including prototype bring-up, integration testing, load testing, grid simulation, fault testing, thermal testing, and reliability testing
Define validation plans for electrical performance, efficiency, dynamic response, protection behavior, controls performance, communications, safety, EMI/EMC, thermal limits, and environmental operating conditions
Analyze test data to validate performance against requirements and identify design gaps, control issues, thermal issues, component limitations, or system-level risks
Lead root-cause analysis and corrective actions for prototype failures, test anomalies, performance gaps, and certification issues
Work with certification bodies and test labs to define the pathway toward applicable UL, IEEE, IEC, NEC, NRTL, grid interconnection, EMI/EMC, and safety requirements
Required Qualifications:
B.S., M.S., or Ph.D. in Electrical Engineering, Power Electronics, Power Systems, Controls, or a related field
10+ years of experience in power electronics, high-power converter development, grid-interactive systems, or advanced energy systems
Demonstrated experience with power conversion systems in the hundreds-of-kW to MW range; direct MW-class converter experience strongly preferred
Strong hands-on experience with SiC-based power conversion; GaN experience preferred
Experience leading high-power electrical products from concept through prototype, validation, and certification or production readiness
Deep understanding of converter topologies, semiconductor switching behavior, gate drivers, magnetics, DC link design, busbars, protection, filtering, EMI/EMC, and thermal constraints
Experience developing product requirements, engineering requirements, system specifications, test plans, validation plans, and certification-readiness documentation
Strong understanding of high-voltage and high-power safety, including isolation, creepage/clearance, grounding, fault containment, arc flash considerations, and lab safety practices
Ability to evaluate system-level tradeoffs across performance, cost, reliability, manufacturability, scalability, certification complexity, and time-to-market
Excellent technical communication skills with the ability to influence architecture decisions and align technical and non-technical stakeholders
Preferred Experience
Experience with Solid State Transformers, multi-port converters, modular converters, medium-voltage power conversion, or high-power isolated DC/DC architectures
Development of MW-class inverters, converters, rectifiers, UPS systems, EV fast charging systems, BESS power conversion systems, solar inverters, wind converters, industrial drives, or medium-voltage power electronics
Experience with grid-tied systems, renewable energy systems, energy storage, data center power, DC microgrids, or hybrid energy systems
Familiarity with grid-forming, grid-following, droop control, black start, synchronization, fault ride-through, harmonic control, and power quality requirements
Experience with SiC MOSFET modules, GaN devices, advanced gate drivers, laminated busbars, high-frequency magnetics, and high-power capacitor banks
Familiarity with simulation tools such as MATLAB/Simulink, PLECS, PSCAD, PSIM, LTspice, SPICE-based tools, or equivalent platforms
Experience with NRTL/certification labs and standards such as UL 1741, UL 1973, UL 9540, UL 2202, IEEE 1547, IEC 62477, IEC 61000, IEC 61800, or related high-power product standards
Experience working in a startup or fast-moving hardware product development environment
Ideal Candidate Profile
The right candidate has real MW-class power electronics experience, not just simulation or low-power design experience. They can compare SiC, GaN, Solid State Transformer, modular, isolated, and transformer-based architectures and make practical tradeoffs across performance, cost, reliability, certification, manufacturability, and schedule.
They are comfortable moving from product requirements to engineering requirements, from architecture to prototype, and from test data to root-cause analysis. They also know how to evaluate external partners and hold them accountable while helping Exowatt build strong internal technical capability.
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
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Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Engineering
47 days ago
Lead Power Electronics Engineer - MW-Class Multi-Port Power Conversion
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are looking for a Lead Power Electronics Engineer to lead development of Exowatt’s next-generation MW-class multi-port power conversion solution. This person will own system architecture, product and engineering requirements, partner evaluation, development oversight, validation, and certification readiness for a high-power solution using advanced technologies such as SiC, GaN, and/or Solid State Transformer architectures.
This is a senior technical role for someone who has designed, developed, or brought up power conversion systems at the hundreds-of-kW to MW scale. The ideal candidate has practical experience with high-power converter design, grid-interactive systems, controls integration, protection, thermal and mechanical design, EMI/EMC, safety, and certification.
The person in this role will work closely with product, systems, controls, firmware, mechanical, thermal, manufacturing, supply chain, and external development partners to bring a robust MW-level multi-port solution to certification readiness by Q4 2027.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Mechanical Engineer – Optical Systems (Miami, FL)
Miami, FLEngineering /Full-Time /On-Site
APPLY FOR THIS JOB
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking a Mechanical Engineer to join our optics team. The team owns the full design-to-commissioning lifecycle for our tracker hardware: precision optical elements and the structures that position them, solar tracking architectures, structural analysis under wind and gravity loading, and the instrumentation that turns prototypes into measured systems. The core problem is deceptively hard: hold optical precision on a large structure that moves all day, outdoors, under wind, gravity, and thermal swings, all at a cost that can scale to thousands of units.
At its core, this is a builder's role. Your main focus will be optomechanical assemblies: designing, fabricating, assembling, aligning, and testing the hardware that positions optical elements (lenses and mirrors, for example) on our trackers. The full loop is yours: idea to CAD to built hardware to test data, learning from what breaks and turning the next revision around in days, not months. You will spend most of your time hands-on in the shop, at the assembly bench, and on the test stand. The work spans structures, optics, precision assembly, sensors, and the code and AI agents that read them. This is an AI-native team: agents already drive our simulation campaigns and babysit our long-running tests, and we expect you to work at that level from day one. Everything around your hardware that is code, calculation, or documentation is something an agent should be running for you. Expect real ownership, a steep learning curve, and senior engineers who will review your work closely and push you to grow fast.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Key Responsibilities:
Design, build, and align optomechanical assemblies for the tracker platforms (optic mounts, frames, and alignment and adjustment features), owning them end to end: idea, CAD model, fabricated parts, assembled and working hardware
Build hardware hands-on: assemble prototypes and test articles, fixture and align optics, work through fit-up issues at the bench, and turn what you learn into the next design revision fast
Support test stand build, instrumentation, and commissioning: sensor mounting, wiring, calibration, DAQ integration, first light, and commissioning runs
Troubleshoot electromechanical systems hands-on: wiring harnesses, sensors, motor drivers, encoders, microcontrollers, and the code talking to them; multimeter, oscilloscope, and Python debugger in the same afternoon, root-causing failures and driving corrective actions back into the design
Work AI-native: drive the scripting, analysis, and documentation around your hardware with AI coding agents, and help make the team's test and simulation infrastructure agent-ready so campaigns can run overnight without a human babysitting them
Build and revise CAD models in PTC Creo and SolidWorks; develop drawing packages with GD&T (ASME Y14.5) for fabrication, weldments, and assemblies, run tolerance stack-up analyses, and iterate against fabrication feedback
Support structural analysis across tracker platforms: first-principles hand calculations, ANSYS FEA for detailed analysis, SAP2000 for code-checked wind-load combinations under ASCE 7-22
Maintain subsystem-level BOMs and handle vendor follow-ups: slew drives, optical components, fasteners, sheet-metal fabrication
Document analysis, build progress, and decisions on the team wiki: methodology pages, test plans, weekly status, design memos
Present and defend your own work in design reviews, growing into ownership of larger subsystems over time
Collaborate with controls, software, and supply chain teams, and with external engineering partners and vendors
Qualifications:
BS or MS in Mechanical Engineering, Aerospace Engineering, or a closely related discipline
1+ years of hands-on build or design experience with real hardware; internships, co-ops, research labs, and major project-team roles count
Strong fundamentals in math and physics: you reason from first principles, estimate before you compute, and check every result against known limits before you believe it; we probe this hard in interviews
Working knowledge of a parametric CAD tool; the team uses PTC Creo and SolidWorks
Working understanding of GD&T (ASME Y14.5) and tolerance stack-up analysis
Familiarity with common fabrication processes (machining, sheet metal, welding, 3D printing) and design-for-manufacturability and assembly (DFM/DFA) principles
Ability to back up simulation with first-principles hand calculations, and to run structured root-cause analysis when hardware misbehaves
A track record of building real hardware: internships, capstone projects, FSAE, solar car teams, robotics, makerspaces, or independent builds all count; bench experience matters more than coursework grades
The drive to own the full cycle yourself: take an idea to CAD, to built hardware, to test, learn from the mistakes, and iterate quickly rather than handing steps off to others
Comfort with shop and bench work: hand tools, fixturing, assembly, and careful mechanical work on precision hardware
Coursework or hands-on project experience in solid mechanics, statics, dynamics, and finite element analysis
Comfort troubleshooting electromechanical systems hands-on: wiring harnesses, sensors, motor drivers, encoders, microcontrollers, and the firmware or software talking to them
Fluency with AI coding agents (Claude Code, Codex, or similar) as a daily engineering tool: you use them to write most of your code, and you own every line they produce, reviewed, tested, and understood; expect us to ask you to show how you work with AI the same way we ask about your bench skills
The instinct to make work agentic: you can decompose a workflow into steps an agent can execute, with clean interfaces, verifiable checkpoints, and guardrails, and you have the judgment to catch an agent when it is confidently wrong; engineers who can direct several agents at once will outrun those who type everything themselves, and we hire the former
Strong written communication: you can document your work clearly enough that the next engineer can pick it up without asking you
The temperament to hold your ideas loosely: designs evolve weekly and priorities shift on real evidence; engineers who can let go and update move fastest
Preferred Qualifications:
Hands-on experience assembling or aligning optical or precision mechanical hardware
Experience with motion components and mechanisms: bearings, actuators, gear and slew drives, bolted and welded joint design
Exposure to design validation and reliability practices: DFMEA, DVP&R, or environmental qualification testing
Coursework or research in optical systems, photonics, heat transfer, or solar energy
Hands-on experience with ANSYS, SAP2000, or another FEA package beyond classroom problem sets
Python or MATLAB scripting: kinematics, data reduction, plotting
Experience building agentic systems around real hardware or simulation: agents driving instruments, CAD, or simulation models through tool interfaces (MCP or similar), running parameter sweeps overnight, and summarizing the results; or any project where you gave an AI real levers and made its output trustworthy
Lab or test-stand experience involving DAQ, instrumentation, or calibration
Familiarity with controls fundamentals: open-loop versus closed-loop, sensor fusion concepts
Interest in solar energy, heliostats, or large-scale renewable infrastructure
Additional Requirements:
Willingness to work extended hours and occasional weekends when builds, test campaigns, or program deadlines demand it
Ability to lift up to 25 lbs unassisted, and to work safely with shop tools, ladders, and lifts with appropriate PPE
Ability to work outdoors in Miami heat during assembly and field testing
Occasional travel to fabricators, vendors, and field sites
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
Jobs powered by
Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Engineering
50 days ago
Optomechanical Integration & Test Engineer (Miami, FL)
Optomechanical Integration & Test Engineer (Miami, FL)
Miami, FLEngineering /Full-Time /On-Site
APPLY FOR THIS JOB
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking an Optomechanical Integration & Test Engineer to join our optics team. The team owns the full design-to-commissioning lifecycle for our tracker hardware: precision optical elements and the structures that position them, solar tracking architectures, structural analysis under wind and gravity loading, and the instrumentation that turns prototypes into measured systems. This role owns that last part. The core problem: prove, with numbers you can defend, that precision optics on a large structure that moves all day, outdoors, under wind, gravity, and thermal swings, actually deliver the energy the models promise, and find out exactly why when they don't.
At its core, this is a measurement role for someone who likes to build. Nothing the team designs counts until it is measured, and you will own the infrastructure that produces those measurements: indoor optical benches, a high-flux test facility, and outdoor on-sun test stands. The full loop is yours: test plan to fixture design to instrumented stand to commissioning to data with error bars, learning from every campaign and turning the next test around in days, not months. You will spend most of your time hands-on at the bench, in the high-flux bay, and in the field. The work spans precision alignment, radiometry, thermal measurement, sensors and DAQ, and the Python and AI agents that run them. This is an AI-native team: agents already drive our simulation campaigns and babysit our long-running tests, and we expect you to engineer at that level from day one. A test stand you build is not finished until an agent can run it. Expect real ownership, a steep learning curve, and senior engineers who will review your work closely and push you to grow fast.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Key Responsibilities:
Own optical test stands end to end, from indoor characterization benches to the high-flux test facility to outdoor on-sun stands: concept, CAD, fixtures, instrumentation, commissioning, first light, and day-to-day operation
Design and run test campaigns from hypothesis to conclusion: write the test plan, build the setup, take the data, quantify the uncertainty, and present results that drive real design decisions
Characterize optical components and assemblies: alignment verification, focal and flux measurements, camera-based flux mapping, radiometry and thermal power measurement, reflectance and transmittance
Develop precision alignment procedures and tooling for optical assemblies on tracker platforms, and verify pointing and tracking accuracy in the field
Select, mount, wire, and calibrate instrumentation (radiometers and power sensors, thermocouples, cameras, tilt sensors, encoders, weather and irradiance instruments) and integrate everything into DAQ systems
Automate tests in Python: instrument control, data acquisition, analysis pipelines, and the plots and reports that make results legible to the whole team
Make the test infrastructure agent-ready: expose instruments, test sequencing, and data pipelines through clean scriptable interfaces so AI agents can configure a test, run it, watch it overnight, and flag anomalies, then use those agents to run campaigns that would otherwise wait on a human
Close the loop between simulation and hardware: compare measured optical performance against raytrace predictions and chase discrepancies to root cause, whether the flaw is in the hardware or in the measurement
Run environmental and durability testing on optical components (thermal cycling, weathering, soiling) and help build the reliability story for hardware that must survive decades outdoors
Own test safety around concentrated flux: hazard analyses, interlocks, PPE, and safe operating procedures for indoor high-flux testing and on-sun operations
Document test plans, procedures, results, and decisions on the team wiki; present and defend your own work in design reviews, growing into ownership of the team's test strategy over time
Qualifications:
BS or MS in Optical Engineering, Mechanical Engineering, Electrical Engineering, Aerospace Engineering, Physics, or a closely related discipline
2+ years of hands-on laboratory, test, or integration experience with optical or precision hardware; graduate research and substantial internship work count
Strong fundamentals in math and physics: you reason from first principles, estimate before you compute, and check every result against known limits before you believe it; we probe this hard in interviews
Hands-on experience on an optical bench: mounting, aligning, and characterizing optics, and the care and cleanliness habits that precision components demand
Instrumentation fundamentals: sensor selection, signal conditioning, calibration, and DAQ integration
Python for test automation and data analysis: instrument control, numpy/pandas data reduction, publication-quality plots
Fluency with AI coding agents (Claude Code, Codex, or similar) as a daily engineering tool: you use them to write most of your code, and you own every line they produce, reviewed, tested, and understood; expect us to ask you to show how you work with AI the same way we ask about your bench skills
The instinct to make work agentic: you can decompose a workflow into steps an agent can execute, with clean interfaces, verifiable checkpoints, and guardrails, and you have the judgment to catch an agent when it is confidently wrong; engineers who can direct several agents at once will outrun those who type everything themselves, and we hire the former
Working knowledge of a parametric CAD tool for fixtures and test hardware; the team uses PTC Creo and SolidWorks
The discipline of good measurement: you control variables, calibrate before you trust, quantify uncertainty, and distrust your own data until the measurement itself is validated
A track record of building real test setups or hardware: research labs, internships, capstone projects, FSAE, solar car teams, robotics, or independent builds all count; bench experience matters more than coursework grades
The drive to own the full cycle yourself: take a question to a test plan, to a built stand, to trustworthy data, learn from the mistakes, and iterate quickly rather than handing steps off to others
Comfort with both bench and field work: precision optical alignment in the morning, commissioning an outdoor test stand in the Miami sun in the afternoon
Structured root-cause instincts when results look wrong: the first suspect is always the measurement, and you know how to clear or convict it
Strong written communication: your test reports should let the next engineer reproduce the measurement without asking you
The temperament to hold your ideas loosely: designs evolve weekly and priorities shift on real evidence; engineers who can let go and update move fastest
Preferred Qualifications:
Radiometry or photometry experience: power meters, flux mapping, camera-based flux measurement, IR thermography
Exposure to concentrating optics, heliostat or CPV testing, or high-flux measurement
Camera-based metrology and image processing: OpenCV or similar, converting images into calibrated measurements
Thermal measurement experience: calorimetry, heat flux sensors, flow-and-temperature-based power measurement
Design validation and reliability practices: DVP&R, accelerated aging, or environmental qualification against IEC/ASTM standards for solar hardware
Motion control experience: stages, encoders, motorized mounts, closed-loop pointing systems
Exposure to optical simulation (LightTools, Zemax, or another raytracer) and to comparing measurement against model
Statistics for test engineering: design of experiments, measurement system analysis, formal uncertainty budgets
Experience building agentic systems around real hardware or simulation: agents driving instruments or ray-trace models through tool interfaces (MCP or similar), running parameter sweeps overnight, and summarizing the results; or any project where you gave an AI real levers and made its output trustworthy
Machine shop skills and rapid prototyping: you can make the bracket you need instead of waiting for it
Interest in solar energy, heliostats, or large-scale renewable infrastructure
Additional Requirements:
Willingness to work extended hours and occasional weekends when test campaigns, commissioning windows, or program deadlines demand it
Ability to lift up to 25 lbs unassisted, and to work on ladders and lifts and around energized equipment and concentrated light with appropriate PPE
Ability to work outdoors in Miami heat for extended periods during field testing
Occasional travel to vendors, calibration labs, and field sites
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
Jobs powered by
Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking a Mechanical Engineer to join our optics team. The team owns the full design-to-commissioning lifecycle for our tracker hardware: precision optical elements and the structures that position them, solar tracking architectures, structural analysis under wind and gravity loading, and the instrumentation that turns prototypes into measured systems. The core problem is deceptively hard: hold optical precision on a large structure that moves all day, outdoors, under wind, gravity, and thermal swings, all at a cost that can scale to thousands of units.
At its core, this is a builder's role. Your main focus will be optomechanical assemblies: designing, fabricating, assembling, aligning, and testing the hardware that positions optical elements (lenses and mirrors, for example) on our trackers. The full loop is yours: idea to CAD to built hardware to test data, learning from what breaks and turning the next revision around in days, not months. You will spend most of your time hands-on in the shop, at the assembly bench, and on the test stand. The work spans structures, optics, precision assembly, sensors, and the code and AI agents that read them. This is an AI-native team: agents already drive our simulation campaigns and babysit our long-running tests, and we expect you to work at that level from day one. Everything around your hardware that is code, calculation, or documentation is something an agent should be running for you. Expect real ownership, a steep learning curve, and senior engineers who will review your work closely and push you to grow fast.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Engineering
50 days ago
Optomechanical Integration & Test Engineer (Miami, FL)
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking an Optomechanical Integration & Test Engineer to join our optics team. The team owns the full design-to-commissioning lifecycle for our tracker hardware: precision optical elements and the structures that position them, solar tracking architectures, structural analysis under wind and gravity loading, and the instrumentation that turns prototypes into measured systems. This role owns that last part. The core problem: prove, with numbers you can defend, that precision optics on a large structure that moves all day, outdoors, under wind, gravity, and thermal swings, actually deliver the energy the models promise, and find out exactly why when they don't.
At its core, this is a measurement role for someone who likes to build. Nothing the team designs counts until it is measured, and you will own the infrastructure that produces those measurements: indoor optical benches, a high-flux test facility, and outdoor on-sun test stands. The full loop is yours: test plan to fixture design to instrumented stand to commissioning to data with error bars, learning from every campaign and turning the next test around in days, not months. You will spend most of your time hands-on at the bench, in the high-flux bay, and in the field. The work spans precision alignment, radiometry, thermal measurement, sensors and DAQ, and the Python and AI agents that run them. This is an AI-native team: agents already drive our simulation campaigns and babysit our long-running tests, and we expect you to engineer at that level from day one. A test stand you build is not finished until an agent can run it. Expect real ownership, a steep learning curve, and senior engineers who will review your work closely and push you to grow fast.
This position is based in Miami, FL. If selected, relocation to Miami, FL is required. Exowatt provides relocation assistance.
Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Engineering
85 days ago
Lead Mechanical Engineer - Structures (Austin, TX)
Lead Mechanical Engineer - Structures (Austin, TX)
Austin, TXEngineering /Full-Time /On-Site
APPLY FOR THIS JOB
Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking an experienced Mechanical Engineer specializing in structural design to join our growing team. In this role, you will engage in the structural design and analysis of our renewable energy systems, ensuring structural integrity, durability, and performance in diverse environmental conditions.
This position is based in Austin, TX, but an alternate of Miami, FL is possible for the right candidate. If selected, relocation to Austin, TX or Miami, FL is required. Exowatt provides relocation assistance.
Key Responsibilities:
Create the structural design of both stationary and moving structures and associated mechanical or drive components and system layouts for renewable energy applications
Develop and validate structural models using Finite Element Analysis (FEA) and other analytical methods
Create detailed engineering drawings and specifications for manufacturing
Collaborate with cross-functional teams, including controls, electrical, thermal, and software engineers
Evaluate and select appropriate materials based on structural strength requirements, stiffness, cost, and sustainability
Design for manufacturability, assembly, and serviceability
Mentor junior engineers and provide technical guidance to the mechanical engineering team
Interface with suppliers, manufacturers, and external engineering partners
Participate in design reviews and ensure compliance with industry standards and regulations
Troubleshoot structural issues during testing and deployment
Qualifications:
Bachelor's degree in Mechanical Engineering or related field; Master's degree preferred
7+ years of mechanical engineering experience
Extensive knowledge of structural mechanics, materials science, and manufacturing processes
Proficiency in 3D CAD software (SolidWorks, Creo, or similar)
Experience with FEA software (ANSYS, Nastran, or similar)
Strong understanding of GD&T ASME Y14.5 and engineering drawing standards
Experience designing for extreme environmental conditions (high winds, seismic events, etc.)
Knowledge of relevant standards and codes (ASME, ISO, IEC, etc.)
Experience with renewable energy systems (solar, wind, or energy storage) preferred
Excellent communication and collaboration skills
$150,000 - $215,000 a year
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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Lead Controls & Firmware Engineer (Austin, TX)
Austin, TXEngineering /Full-Time /On-Site
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Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are looking for a Controls & Firmware Engineer to help design and implement the control architecture for our scalable thermal energy storage system. This hands-on role involves both PLC programming and embedded firmware development, giving flexibility as we evolve our platform from industrial controllers to custom microcontroller-based solutions. The engineer will also contribute to building test benches, CI/CD pipelines, and GitHub-based workflows to ensure high reliability and rapid iteration.
This position is based in Austin, TX, however an alternate location of Miami, FL is possible for the right candidate. If hired for this role, relocation to one of these sites is required. We provide relocation assistance.
Key Responsibilities
Controls (PLC Path)
Develop and test PLC programs (Siemens, Rockwell, or equivalent) for system,
module, and site-level controllers.
Implement safety interlocks, alarms, and operational sequences for energy storage
modules.
Configure and validate industrial communication protocols (Profinet, Ethernet/IP,
OPC UA, DNP3, MQTT).
Integrate different system components with Microcontroller based devices.
Set up and maintain a test bench / HIL environment for PLC validation.
Firmware (Microcontroller Path)
Design and implement embedded firmware in C/C++ (Rust optional) for
microcontrollers if we migrate from PLC-based controls.
Develop and test communication stacks, device drivers, and OTA update
mechanisms.
Ensure deterministic, real-time operation in power and energy storage applications.
Set up and maintain a test bench / HIL environment for validation.
DevOps & CI/CD
Build and maintain CI/CD pipelines (GitHub Actions or similar) for PLC code, firmware,
and test automation.
Implement version control best practices for branching, releases, and tagging
safety-critical builds.
Develop infrastructure to run automated test suites including regression, simulation,
and hardware-in-the-loop.
Energy Storage Integration
Apply knowledge of utility-scale energy storage systems (battery management, PCS
interfaces, dispatch logic).
Participate in the development of control panel design for various components of energy
storage system.
Design & develop EMS/SCADA application to map controls data into historians, HMIs,
and cloud telemetry systems for monitoring & management of the system.
Support system integration, commissioning, and field validation.
Qualifications
Bachelor’s in Electrical, Controls, Computer Engineering, or related field.
2–6 years of experience in PLC programming and/or embedded firmware development.
Proficiency with Siemens TIA Portal / Rockwell Studio 5000 (or similar).
Strong coding skills in C/C++ (Rust/Python a plus).
Experience with GitHub workflows, CI/CD pipelines, automated testing.
Familiarity with utility-scale energy systems or DERs.
Understanding of industrial networking and protocols (Profinet, Ethernet/IP, OPC UA,
DNP3, MQTT).
Preferred Skills
Exposure to energy storage standards (UL 9540, IEC 62443, IEC 61131-3, IEEE
1547).
Knowledge of cloud-integrated controls (AWS IoT Core, InfluxDB, Timestream,
CloudWatch).
Experience setting up test benches, simulators, or hardware-in-the-loop systems.
$125,000 - $185,000 a year
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
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Engineering
85 days ago
Lead Mechanical Engineer - Heat Exchangers (Austin, TX)
Lead Mechanical Engineer - Heat Exchangers (Austin, TX)
Austin, TXEngineering /Full-Time /On-Site
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Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking an experienced Mechanical Engineer specializing in heat exchanger design to join our growing team. In this role, you will lead the design, analysis, and optimization of heat exchangers for our thermal energy storage systems, ensuring efficient heat transfer, system reliability, and performance across demanding operational conditions.
This position is based in Austin, TX, however an alternate location of Miami, FL is possible for the right candidate. If hired for this role, relocation to one of these sites is required. We provide relocation assistance.
Key Responsibilities:
Own and develop the heat exchange system for Exowatt’s power conversion unit from design and analysis in a hands-on fashion. Engage with suppliers for development, build and testing.
Perform analysis of mechanical components and systems for heat exchangers utilizing CFD and FEA such as Ansys multiphysics, CAD (Solidworks, Creo, or equivalent.
Design, build and test of prototype heat exchanger units for Exowatt’s power conversion units.
Validate models by test and analytical methods
Create detailed engineering drawings and specifications for manufacturing
Collaborate with cross-functional teams, including electrical, controls, thermal, and software engineers
Evaluate and select appropriate materials based on requirements, cost, and sustainability
Design for manufacturability, assembly, and serviceability
Interface with suppliers, manufacturers, and external engineering partners
Participate in design reviews and ensure compliance with industry standards and regulations
Troubleshoot issues during testing and deployment
Qualifications:
Bachelor's degree in Mechanical Engineering or related field; Master's degree preferred
7+ years of mechanical engineering experience with a focus on thermal-fluid systems with a focus on heat exchanger design, analysis, and development.
Demonstrated experience designing, analyzing, and optimizing heat exchangers (shell-and-tube, fined heat exchangers, heat sinks, printed circuit heat exchangers, heat pipes, etc) for high temperature applications.
Hands-on experience in testing of heat exchangers, energy, and power conversion systems.
Strong foundation in thermodynamics, conjugate heat transfer, fluid mechanics, and thermal coatings, with the ability to perform thermal and hydraulic sizing calculations
Proficiency in 3D CAD software (SolidWorks, Creo, or similar) and experience designing complex flow paths and pressure-containing components
Experience with FEA and CFD software (ANSYS multiphysics, Nastran, or similar) for thermal stress analysis and fatigue life prediction under cyclic operating conditions
Familiarity with CFD tools for flow distribution, heat transfer optimization, and pressure drop analysis
Strong understanding of GD&T ASME Y14.5 and engineering drawing standards for precision-manufactured components
Knowledge of relevant standards and codes (ASME BPVC, TEMA, API, ISO) as applied to pressure vessels, heat exchangers, and rotating equipment
Experience designing for demanding operating environments, including thermal cycling, high-temperature creep, and corrosive or reactive working fluids
Experience with renewable energy systems, thermal energy storage, or concentrated solar power preferred
Excellent communication and collaboration skills with the ability to work across multidisciplinary teams
$180,000 - $215,000 a year
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
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Listed by Exowatt for a position based in the United States. Employers on this board attest they are hiring domestically.
Lead Optical Engineer (Austin, TX)
Austin, TXEngineering /Full-Time /On-Site
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Exowatt is revolutionizing the energy landscape for the AI era with our groundbreaking P3 system that captures solar energy, stores it as heat, and generates electricity on demand. Founded in 2023 and backed by leading investors including Andreessen Horowitz, Sam Altman, and Felicis, we're committed to providing clean, modular, and scalable power that meets the rapidly growing demands of AI infrastructure. Our mission is to make sustainable renewable energy always available and almost free, enabling technological advancement while protecting our planet.
We are seeking a highly skilled and motivated Lead Optical Engineer to own concentrator design, optical testing, and model validation for the P3. In this role, you will design and optimize non-imaging optics for maximum flux transfer, build and automate optical test setups, validate models against on-sun performance, and work across the optic-to-thermal boundary that defines the P3 architecture. You will collaborate closely with the Optical Product Development, R&D, and thermal teams to ensure alignment between design intent, test outcomes, and delivered system performance.
Non-imaging concentrating optics experience is required for this role.
This position is based in Austin, TX preferred, however an alternate location of Miami, FL is possible for the right candidate. If hired for this role, relocation to one of these sites is required. We provide relocation assistance.
What You'll Do:
Design and optimize non-imaging concentrating optics — Fresnel primaries and secondary optical elements — to maximize flux transfer, uniformity, and intercept factor rather than image quality.
Build an optical error budget that rolls slope error, tracking error, and alignment tolerances into an intercept-factor model, and validate it against hardware.
Design for uniform irradiance on the receiver, mitigating hot spots and the material stress that uneven flux drives on a thermal absorber.
Design, automate, and optimize optical test setups for our concentrators and complex opto-mechanical assemblies, ensuring efficiency and precision.
Characterize concentration ratio, acceptance angle, focal-spot flux distribution, and end-to-end optical efficiency, and validate these against Monte Carlo ray-tracing models.
Automate ray-tracing, test procedures, and analysis using Python (and C++/MATLAB as needed) to streamline workflows and improve accuracy.
Conduct on-sun testing — flux mapping, calorimetry, and pyrheliometer-based efficiency measurement — and reconcile field results with simulation.
Feed validated optical performance into annual optical-efficiency models, thermal models, and the system digital twin (developed with NVIDIA and AWS).
Characterize soiling, UV degradation, and abrasion on polymer optics, and evaluate anti-reflective and anti-soiling coatings to support a 30-year field lifespan.
Define and validate manufacturing tolerances for optical components produced at high volume in domestic factory settings.
Collaborate with optical, mechanical, electrical, thermal, and systems engineering teams to ensure alignment across product development stages.
Maintain clear, organized technical documentation for internal teams and external stakeholders.
What You Have:
Education & foundation
Master's or PhD in Optical Engineering, Physics, Electrical Engineering, or a related discipline, with a minimum of 3 years of industry experience, or equivalent work experience.
Hands-on experience with optical systems in a lab environment, including assembly, alignment, integration, and testing.
Core non-imaging design competencies
Concentrator design experience with Fresnel lenses (ideally molded PMMA or silicone-on-glass), compound parabolic concentrators (CPCs), parabolic troughs, heliostats, or secondary optical elements (SOEs). Designing a coupled primary + secondary stage for CPV or CSP is an ideal match.
Fluency in the language of concentration limits — étendue conservation, geometric concentration ratio, acceptance angle, and the concentration-acceptance product (CAP).
Command of the edge-ray principle and tailored-optics design, optimizing for flux transfer over image quality; familiarity with Winston/Miñano/Benítez methods or simultaneous multiple surface (SMS) design is a strong plus.
Experience designing for irradiance uniformity, hot-spot mitigation, and intercept-factor optimization on a receiver or absorber.
Software & simulation
Proficiency with Monte Carlo ray-tracing tools built for illumination/flux work — TracePro, LightTools, FRED, Photopia, or CSP-specific codes such as SolTrace or Tonatiuh. Zemax/OpticStudio in non-sequential mode counts; sequential-only imaging experience is a weaker fit.
Ability to build custom ray-tracing or optimization routines in Python or MATLAB, and to construct optical error budgets (slope, tracking, and alignment tolerances rolled into an intercept-factor model).
Solar-specific domain knowledge
Familiarity with sun-shape and DNI modeling, circumsolar ratio, cosine losses, and annual optical-efficiency simulation (often paired with SAM or similar performance models).
Tracking-system tolerance analysis — how pointing error degrades concentration — with awareness of UL 3703-adjacent tracker considerations.
Understanding of soiling, UV degradation, and abrasion on polymer optics, and of anti-reflective and anti-soiling coatings.
Hardware & manufacturing
Exposure to injection or compression molding of PMMA/silicone Fresnel optics, diamond turning of mold masters, and metrology for large-aperture optics (deflectometry, photogrammetry, VSHOT-type slope measurement).
Receiver/absorber interface experience — cavity receivers, selective absorber coatings, or thermal receiver flux limits — demonstrating work across the optic-to-thermal boundary that defines the P3.
Outdoor test experience: on-sun testing, flux gauges and calorimetry, and pyrheliometer-based efficiency measurement.
Ways of working
A problem-solving mindset, with the ability to work independently and collaboratively.
Excellent communication skills, capable of articulating technical concepts to both technical and non-technical audiences.
What We Offer:
Competitive salary and equity options.
Comprehensive benefits package, including health, dental, and retirement plans.
A dynamic work environment that fosters creativity and innovation.
Opportunities for professional growth and development in a rapidly evolving industry.
Relocation assistance.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
APPLY FOR THIS JOB
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