Founding Full-Stack Engineer

Helium · San Francisco, CA, US · In-office · Posted 2mo ago

$125k - $200k

Self Improving Software

**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, Android

Requires Bachelors degree or higher in Computer Science or similar fields.

Apply on Helium's site