Job Details

Founding Full-Stack Engineer

  2025-11-02     Helium (Automate paywall testing)     San Francisco,CA  
Description:

What You'll Do

  • You will be building an AI paywall editor that serves millions of customers everyday, including touching the front-end Next.js application and back-end high performance Golang server.
  • Writing and deploying scalable Golang code that serves thousands of requests each second globally.
  • Tuning and load testing servers to ensure that global performance is fast as possible for end users.
  • Designing data systems that power experimentation tools for users, and ML training infrastructure.
  • Work cross functionally with the founders, and directly with 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're uncomfortable with ambiguity, or need super structured requirements
  • You prefer to only one part of the stack, and aren't willing to work across everything
  • You've never worked on systems with many moving parts: Our software has many different moving parts that you will be required to ramp up on
  • You've never built an end to end feature you're really proud of

Requirements

  • You have 1‑4+ years of engineering experience, with a strong track record of shipping real products.

???? Note ???? full‑time, in‑person role based in San Francisco – we work from the office 6 days a week (Mon‑Sat) * You must be based in the Bay Area or willing to relocate before starting . * We require US work authorization , but are open to O‑1 visa sponsorship for truly exceptional candidates.

Our Stack

  • Next.js (React/Typescript), Zustand
  • AI (vercel) SDK
  • Tailwind/Shadcn
  • Supabase
  • Clickhouse
  • Golang/Fly.io
  • Mobile: Swift, Flutter, Expo, Android
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