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Senior Data Scientist BoldVoice · New York, NY, US $140k–220k 42 days ago On-site Engineering

Fullstack Engineer BoldVoice · New York, NY $140k–250k 254 days ago On-site Engineering

Machine Learning Researcher Engineer BoldVoice · New York, NY, US $140k–250k 408 days ago On-site Engineering

Engineering

42 days ago

Senior Data Scientist

BoldVoice · New York, NY, US

Pay

$140k–220k

Setting

On-site

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Work at a Startup Startup Jobs Resume Review Education How it Works Log In Senior Data Scientist at BoldVoice(S21) $140K - $220K • 0.09% - 0.20% Speech and accent coaching app for non-native English speakers New York, NY, US Full-time US citizen/visa only 6+ years Apply now About BoldVoice BoldVoice is a communication coaching app that helps ESL professionals find their clearest and most confident voice so they can succeed in the global workplace. Combining bite-sized videos from Hollywood accent coaches with real-time AI feedback on pronunciation, BoldVoice delivers an engaging and personalized learning experience at a fraction of the price of traditional coaching. About the role 💪🗣 About BoldVoice BoldVoice (YC S21) is an AI-powered communication coach that helps non-native English speakers improve their pronunciation, clarity, and confidence. The app combines video lessons from Hollywood accent coaches with instant AI feedback as you speak, powered by our proprietary speech models. It has been downloaded by 5M+ users globally, is one of the top Education apps on the App Store, and has been featured in Forbes, TechCrunch, Wired, and Business Insider. We recently raised a $21M Series A led by Matrix Partners, with Flybridge, XFund, and Y Combinator. We're a small, fast-moving team with a mission to help 1 billion people speak English clearly and advance their careers. 📊 About the Role We're looking for our first Data Scientist to own how BoldVoice measures itself and decides what to build next. This is not a reporting role. You will be the person who decides what "working" means for a feature, designs the experiment that tests it, calls the result honestly, and then digs into the data to find the next thing worth building. You'll sit at the intersection of product, growth, and our speech ML team, and your analyses will directly change the roadmap. There is a large, unusually rich dataset waiting for you: many users, tens of millions of scored speech attempts, 100+ native language backgrounds, and a full consumer subscription funnel. 👩‍💻👨‍💻 What you'll do Own experimentation end to end: help design A/B tests, choose the metrics up front, run the analysis with proper statistical rigor, and make the call on what ships Build and own the metric layer the whole company runs on: activation, trial start, trial to paid conversion, retention curves, LTV, and learning outcomes Run the deep dives that change the roadmap. Why do speakers of one native language retain twice as well as another? Which lessons actually move pronunciation scores? What separates a user who sticks around from one who churns in week one? Turn behavioral and speech-scoring data into models the product uses: churn and conversion propensity, lesson recommendation, and personalization of the learning path Partner with growth on paid acquisition measurement: CAC by channel and creative, payback, incrementality, and where the next marketing dollar should go Work with the ML team to measure model quality in the wild, including how our speech models perform across accents and whether a model change actually improved user outcomes Make data self-serve, so a PM, designer, or engineer can answer their own question without waiting on you 😀 Who you are You take a question from "we don't know why this is happening" all the way to a recommendation the team acts on that week You have strong statistical judgment. You know when a result is real, when it is noise, and you say so plainly even when the answer is inconvenient You care about the product, not just the analysis. Your goal is to change what ships, not to produce a spreadsheet or deck You want to work fast, you want to not get interrupted by meetings, and you want to not need to ask for permission to do things ✨ Requirements At least 5 years in data science or product analytics, ideally at a consumer subscription app or a fast-moving startup Deep experimentation experience: power analysis, variance reduction techniques like CUPED, handling multiple comparisons, and recognizing when a clean A/B test isn't possible Strong SQL and Python (pandas, scikit-learn, statsmodels or equivalent). You have worked directly against a production database, not only through a BI tool Fluency with the consumer subscription funnel: install to trial to paid, cohort retention, LTV, and paid acquisition measurement Experience with product analytics and experimentation tooling. We use Mixpanel and GrowthBook on top of PostgreSQL Up to date with latest developments in using LLM tools like Claude Code, Cursor, Codex or similar to rapidly prototype and ship code quickly We work out of our office in downtown NYC, and want our team to be in person at least 3x a week Nice to have: causal inference beyond A/B testing, exposure to speech or audio ML evaluation, or experience measuring learning outcomes in education products 🎯 What success looks like in 3 months The team trusts one shared definition of our core metrics, and you own it Experiment velocity is up and experiment quality is higher, because you set the bar for how we read results You have found at least one non-obvious insight about our users that changed what we build You are the person people come to before deciding whether a feature worked 🎁 What we offer You will be compensated in salary and generous stock options, so you feel like an integral part of the success and growth of the company Benefits include excellent fully paid health/vision/dental insurance and a 401K program We're an in-person team and we work out of our office in downtown Manhattan in NYC. If you're not in NYC, we would like to help you move here and can help with your relocation A+ team: join a small and mighty team where your work has immediate impact Access to exclusive startup events, conferences and networks 📲 How to Apply: Reach out here or email us at engineering [at] boldvoice [dot] com to start the conversation. Include a short note about an analysis you ran that changed a product decision, and what you'd want to look at first at BoldVoice. Technology Our tech stack is: React Native, for iOS and Android mobile apps React, for web CMS Node/Express/PostgreSQL, for backend Heroku, for hosting Bugsnag, Mixpanel, NewRelic, Mailgun, as other services we use Apply now Other jobs at BoldVoice Fullstack Engineer New York, NY Full-Time $140K - $250K 0.09% - 0.20% 6+ Years View job Senior Product Designer (NYC) New York Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Machine Learning Researcher Engineer New York, NY, US Full-Time $150K - $300K 0.12% - 0.25% 6+ Years View job Senior Product Manager New York, NY, US Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Hundreds of YC startups are hiring on Work at a Startup. 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Listed by BoldVoice for a position based in the United States. Employers on this board attest they are hiring domestically.

Engineering

254 days ago

Fullstack Engineer

BoldVoice · New York, NY

Pay

$140k–250k

Setting

On-site

Apply Sign in to favorite Permalink

Work at a Startup Startup Jobs Resume Review Education How it Works Log In Fullstack Engineer at BoldVoice(S21) $140K - $250K • 0.09% - 0.20% Speech and accent coaching app for non-native English speakers New York, NY Full-time US citizen/visa only 6+ years Express Node.js PostgreSQL React React Native Apply now About BoldVoice BoldVoice is a communication coaching app that helps ESL professionals find their clearest and most confident voice so they can succeed in the global workplace. Combining bite-sized videos from Hollywood accent coaches with real-time AI feedback on pronunciation, BoldVoice delivers an engaging and personalized learning experience at a fraction of the price of traditional coaching. About the role 💪🗣 About BoldVoice BoldVoice helps the 1 billion global non native English speakers speak English with clarity and confidence, so they can advance their careers and lives. The app gives users instant pronunciation feedback from speech AI, and then teaches them how to improve with video lessons and training exercises, developed by Hollywood accent coaches. Today, BoldVoice is one of the top Education apps on the App Store and serves non-native speakers of 100+ different language backgrounds all over the world. About the role Tech stack: React Native (iOS & Android), React (CMS, Webapp), Node / Express, PostgreSQL 👩‍💻👨‍💻 Role As a full-stack engineer at BoldVoice, you will own features end to end, working on: iOS and Android mobile apps that thousands of users open every day Remix web app that powers experiences like The Accent Oracle Data models and APIs on the backend Admin CMS which we use to manage content in the app and see what is going on There’s so much that we want to build. If you’ve ever seen how engaging and interactive an app like Duolingo is, you’ll understand how much building we’ve got ahead of us. We want to create a similarly engaging experience for people who already know English, but now want to work on their accent and speech confidence. 😀 Who you are You work fast, aren’t afraid to get your hands dirty, and focus on simplicity to solve problems the right way You care about the small stuff, you believe that details matter, and it’s always worth it to deliver a better user experience No job is too small, nor any problem too big to work through You know a thing or two about React, React Native and Javascript best-practices ✨ Requirements You’ve worked before on a small team at a fast-paced company You have at least 3 years of experience as a full stack engineer, working on React based web, mobile or desktop apps We work out of our office in downtown NYC, and want our team to be in person at least 3x a week Up to date with latest developments in using LLM tools like Claude Code, Cursor, Codex or similar to rapidly prototype, and ship code quickly 🎁 What we offer You will be compensated in salary and generous stock options -- we want you to feel like an integral part of the success and growth of the company Benefits include excellent fully paid health/vision/dental insurance and 401K We’re an in-person team and we work out of our office in downtown Manhattan in NYC. If you’re not in NYC, we would like to help you move here and can help with your relocation. Access to exclusive startup events, conferences and networks 📲 How to Apply: Reach out here or email us at engineering [at] boldvoice [dot] com to start the conversation! Technology Our tech stack is: React Native, for iOS and Android mobile apps React, for web CMS Node/Express/PostgreSQL, for backend Heroku, for hosting Bugsnag, Mixpanel, NewRelic, Mailgun, as other services we use Apply now Other jobs at BoldVoice Senior Data Scientist New York, NY, US Full-Time $140K - $220K 0.09% - 0.20% 6+ Years View job Senior Product Designer (NYC) New York Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Machine Learning Researcher Engineer New York, NY, US Full-Time $150K - $300K 0.12% - 0.25% 6+ Years View job Senior Product Manager New York, NY, US Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Hundreds of YC startups are hiring on Work at a Startup. Sign up to see more › Work at a Startup Jobs Internships Events How it works Sign in Y Combinator About YC Press Privacy & Terms Contact Jobs by Role Software Engineer Jobs Design & UI/UX Jobs Product Manager Jobs Sales Jobs Marketing Jobs Support Jobs Operations Jobs Jobs by Location Software Engineer Jobs in San Francisco Product Manager Jobs in San Francisco Software Engineer Jobs in New York Product Manager Jobs in New York Software Engineer Jobs in Los Angeles Product Manager Jobs in Los Angeles Remote Jobs Remote Software Engineer Jobs Remote Design & UI/UX Jobs Remote Product Manager Jobs Remote Sales Jobs Remote Marketing Jobs Remote Support Jobs Remote Operations Jobs

Listed by BoldVoice for a position based in the United States. Employers on this board attest they are hiring domestically.

Engineering

408 days ago

Machine Learning Researcher Engineer

BoldVoice · New York, NY, US

Pay

$140k–250k

Setting

On-site

Apply Sign in to favorite Permalink

Work at a Startup Startup Jobs Resume Review Education How it Works Log In Machine Learning Researcher Engineer at BoldVoice(S21) $150K - $300K • 0.12% - 0.25% Speech and accent coaching app for non-native English speakers New York, NY, US Full-time US citizen/visa only 6+ years Python TensorFlow Torch/PyTorch Apply now About BoldVoice BoldVoice is a communication coaching app that helps ESL professionals find their clearest and most confident voice so they can succeed in the global workplace. Combining bite-sized videos from Hollywood accent coaches with real-time AI feedback on pronunciation, BoldVoice delivers an engaging and personalized learning experience at a fraction of the price of traditional coaching. About the role 💪🗣 About BoldVoice BoldVoice helps the 1 billion global non native English speakers speak English with clarity and confidence, so they can advance their careers and lives. The app gives users instant pronunciation feedback from speech AI, and then teaches them how to improve with video lessons and training exercises, developed by Hollywood accent coaches. Today, BoldVoice is one of the top Education apps on the App Store and serves non-native speakers of 100+ different language backgrounds all over the world. 💻 About the Role As a Machine Learning Engineer / Researcher at BoldVoice, you’ll play a critical role in driving the development and optimization of our AI systems. Your work will directly enhance the user experience by creating new machine learning-enabled capabilities, and improve the accuracy and efficacy of our existing machine learning systems. Specifically, you’ll work on: Model Development and Deployment Designing, training, and fine-tuning machine learning models for AI coaching, pronunciation feedback, and accent detection. This will include working on LLMs, speech models like Wav2Wec2.0, and multi-modal models like speech to speech models. Deploying these models into production environments for real-time and batch inference. Pipeline Development and Optimization Building reusable and organized data preprocessing pipelines for various data, including audio data, text data and more. Setting up automated evaluation systems to monitor model performance. Optimizing training workflows to reduce time-to-deployment. You will be joining a top-notch machine learning team, who are striving to push forward what’s possible in speech and audio AI, but also care about creating practical uses for their work. An example of our team’s research can be found here: Accents in Latent Spaces. Our team is also behind the viral hit: BoldVoice Accent Oracle, which has been tried more than 50m times, by users all over the world. 😀 Who you are You have a strong foundation in machine learning, statistics and mathematics, and take pride in building systems that work well and make it into production. You thrive on solving challenging problems, and bring equal parts creativity and focus to methodically try out both proven and unproven techniques. You care about user experience and are driven to create technologies that make a real difference. You want to work fast, you want to not get interrupted by meetings, and you want to not need to ask for permission to do things. ✨ Requirements You have at least 5 years of experience working on machine learning models in production environments, specifically training, fine-tuning, evaluating and directly implementing machine learning models, in the fields of Speech, NLP, and/or Vision Experience in Automatic Speech Recognition (ASR) will be particularly useful, as will knowledge of phonetics and the ability to discern sounds and accents Proficiency in Python and frameworks like TensorFlow, PyTorch, or similar. Up to date with latest developments in using LLM tools like Claude Code, Cursor, Codex or similar to rapidly prototype, and ship code quickly 🎁 What we offer You will be compensated in salary and generous stock options -- we want you to feel like an integral part of the success and growth of the company Benefits include excellent fully paid health/vision/dental insurance and a 401K program We’re an in-person team and we work out of our office in downtown Manhattan in NYC. If you’re not in NYC, we would like to help you move here and can help with your relocation. Access to exclusive startup events, conferences and networks 📲 How to Apply: Reach out here or email us at engineering [at] boldvoice [dot] com to start the conversation! Technology Our tech stack is: React Native, for iOS and Android mobile apps React, for web CMS Node/Express/PostgreSQL, for backend Heroku, for hosting Bugsnag, Mixpanel, NewRelic, Mailgun, as other services we use Apply now Other jobs at BoldVoice Fullstack Engineer New York, NY Full-Time $140K - $250K 0.09% - 0.20% 6+ Years View job Senior Data Scientist New York, NY, US Full-Time $140K - $220K 0.09% - 0.20% 6+ Years View job Senior Product Designer (NYC) New York Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Senior Product Manager New York, NY, US Full-Time $150K - $200K 0.05% - 0.20% 6+ Years View job Hundreds of YC startups are hiring on Work at a Startup. Sign up to see more › Work at a Startup Jobs Internships Events How it works Sign in Y Combinator About YC Press Privacy & Terms Contact Jobs by Role Software Engineer Jobs Design & UI/UX Jobs Product Manager Jobs Sales Jobs Marketing Jobs Support Jobs Operations Jobs Jobs by Location Software Engineer Jobs in San Francisco Product Manager Jobs in San Francisco Software Engineer Jobs in New York Product Manager Jobs in New York Software Engineer Jobs in Los Angeles Product Manager Jobs in Los Angeles Remote Jobs Remote Software Engineer Jobs Remote Design & UI/UX Jobs Remote Product Manager Jobs Remote Sales Jobs Remote Marketing Jobs Remote Support Jobs Remote Operations Jobs

Listed by BoldVoice for a position based in the United States. Employers on this board attest they are hiring domestically.

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