Full-Stack Web Application Contractor

Helium is building self-improving software. We previously led AI & Growth teams at Uber, Meta, and Amazon, and we saw how long it takes to go from idea to experiment for these large companies. We’re building Helium to automate the end-to-end process of generating and experimenting on new in-app experiences. We’re starting by automating generating onboarding flows for consumer apps, then will expand into other experiences across the app. We work with some of the largest, fastest-growing consumer apps, serving Helium experiences to millions of users worldwide. Our momentum: Launched publicly in June '25. Growing X00% month over month since. Working with leading consumer companies, serving experiences to millions of users daily. Backed by >$5M from Y Combinator, Google’s AI fund, and leaders from Uber, OpenAI, Meta, and more. Launched publicly in June '25. Growing X00% month over month since. Working with leading consumer companies, serving experiences to millions of users daily. Backed by >$5M from Y Combinator, Google’s AI fund, and leaders from Uber, OpenAI, Meta, and more. What You’ll Do We’re looking for full-stack talent that can help support our work on our frontend application and backend server stack. Specifically: Make contributions to a Next.js App, improving the frontend components, improving latency and data fetching, and making necessary database/API improvements on the backend. Build features with minimal supervision Creating tests, for both frontend and backend operations. Creating UI tests that can test the functionality of UI components using Pupeteer or Playwright Make contributions to a Next.js App, improving the frontend components, improving latency and data fetching, and making necessary database/API improvements on the backend. Build features with minimal supervision Creating tests, for both frontend and backend operations. Creating UI tests that can test the functionality of UI components using Pupeteer or Playwright What We’re Looking For Engineers who who build fast, create high quality PRs, and can act with minimal hands-on guidance. We’ll expect you to join a daily standup to align on tasks, share progress, and help unblock you. We need to see proficient experience on full-stack development. Our stack is: Next.js (React), typescript, tailwindcss, React-Query and Zustand Backend: Supabase/Postgres Service(s): Python (fastapi, redis fly.io, docker) Next.js (React), typescript, tailwindcss, React-Query and Zustand Backend: Supabase/Postgres Service(s): Python (fastapi, redis fly.io, docker) Very nice to have: Experience with Apple’s app store apis Dashboard/embedded BI tool familiarity Experience with Apple’s app store apis Dashboard/embedded BI tool familiarity Heavily prefer professionals who have worked with this stack before! This is a contract position, we are targeting $8,000 - $10,000 /mo for at least 3 months with the opportunity to extend.