Founding Full-Stack Engineer

About Helium

Self Improving Software

Tech

Here are the technical problems you're solving: • **RL for software personalization** - dynamic assignment of price, paywalls, and experiences to different users based on what improves metrics • **Automated a/b testing** - building systems that automatically chooses and runs new paywall experiments to run based on analytics + codegen models • **AI editor** - think Bolt/Lovable for paywalls • **Billion scale content serving** - we're building a python service to process thousands of QPS that serving assets to millions of phones daily → soon to be billions • **Mobile webview optimization** - building a webview layer that feels native across 4 mobile stacks

The role

**Helium is building Self-Improving Software**: AI that automatically generates & tests new software experiences to lift revenue. We’re…* **Talent-dense** (8 people, 6 engineers, 75% ex-founders)* **Well-funded** ($6M from Google & Leaders from OpenAI)* **Fast-growing** (Serving tens of millions of AI experiences per day for top consumer companies).AI has created a once-in-history opportunity, and we’re here to win, because of that…* **🔴 We work hard — In-Office Monday–Friday + often push through weekends 🔴**# **What You’ll Do**You’ll own big chunks of our AI Experience Generation product serving millions of users per day, including…* Adding new features to the front-end Next.js application and deploying scalable Golang code that serves thousands of requests each second globally.* Tune/Optimize/Load test our servers as we 10x our growth from tens of millions to hundreds of millions of users per day.* Designing data systems and ML training infrastructure that power automated experimentation at scale.* Work directly with founders _and_ customers to design, implement, and deliver the best experiences!* Wearing a lot more hats than listed above 👷.# **What We’re Looking For*** Keen problem solving skills: you are able to cut down ambiguous problems down to first principles and deliver a working solution.* Strong programming/full-stack foundation: You’re comfortable working on both backend code as well as frontend React code.* Experience working directly on user-facing products: you are able to figure out and understand what the user needs, including talking to customers* Stellar cross-functional communication skills: you are able to adapt to our ways of working and be an efficient/effective communicator.* Owning features end to end: you’ll write your own PRDs/quick specs when necessary, and you test your features end to end to make sure they work and satisfy the requirements# **Nice To Haves*** Experience with ML/AI/LLM integration in applications* Experience building scalable backend systems with very demanding SLAs* Background working with design tools, chat experiences, or vibe coding tools* Previous experience founding or working at a high-growth startup# **Reasons This Role Might Not Be A Fit*** You want to work 9-5* You avoid Cursor or AI coding tools.* You can only operate on well-written specs, or feel uncomfortable designing new experiences from scratch.* You don’t want to talk to customers.# **Our stack:*** Next.js (React/Typescript), Zustand* AI (vercel) SDK* Tailwind/Shadcn* Supabase* Clickhouse* Golang/[Fly.io](http://Fly.io)* Mobile: Swift, Flutter, Expo, AndroidRequires Bachelors degree or higher in Computer Science or similar fields.