Founding Engineer

Posted 2 Days Ago
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San Francisco, CA, USA
In-Office
Mid level
Artificial Intelligence • Mobile • Software • Analytics
The Role
Build and scale an AI-powered paywall editor used by millions: implement Next.js frontend and high-performance Python backend, integrate LLMs and APIs, deploy services globally, collaborate with founders and customers, and own features end-to-end.
Summary Generated by Built In
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 Python server.
  • Integrating the latest coding models, APIs, and techniques into the editor to improve generation performance.
  • Writing and deploying Python code that serves hundreds and thousands of requests each second globally.
  • 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
  • Background working with design tools, chat experiences, or vibe coding tools
  • Previous experience founding or working at a high-growth startup
  • Mobile engineering/mobile experience is a plus

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

Requirements
You have 1-4+ years of engineering experience, with a strong track record of shipping real products.
This is a 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
  • Tailwind/Shadcn
  • Supabase
  • Python/Fly.io
  • Mobile: Swift, Flutter, Expo

Skills Required

  • 1-4+ years of engineering experience with a strong track record of shipping real products
  • Comfortable working on both backend code and frontend React code (full-stack)
  • Experience working on user-facing products and talking directly to customers
  • Keen problem solving skills and ability to break down ambiguous problems
  • Stellar cross-functional communication skills
  • Ability to own features end-to-end, write PRDs/quick specs, and test features
  • Based in the Bay Area or willing to relocate before starting
  • In-person role in San Francisco, office 6 days a week (Mon-Sat)
  • US work authorization required (employer open to O-1 sponsorship for exceptional candidates)
  • Experience with high-performance Python servers and scalable systems (serving hundreds/thousands RPS)
  • Experience integrating ML/AI/LLM models into applications
Am I A Good Fit?
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The Company
8 Employees
Year Founded: 2024

What We Do

Helium is a software company that provides an AI-powered platform for mobile app developers to build, test, and optimize paywalls. Their mission is to help consumer subscription apps increase revenue by automating the creation of personalized upsell flows and paywall experiments, allowing developers to improve conversion rates without needing to update their app store builds.

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