Full-Stack Engineer; AI products Early Stage​/Startup​/Founder Exp

Job Title

Salary: $150,000 - $250,000

Ship features on the Next.js / Golang AI Experience Generation product serving tens of millions of users daily. Tune, optimize, and load-test servers as Helium 10x's volume to hundreds of millions of users per day. Design data systems and ML training infrastructure that power automated experimentation k directly with founders and customers (Calm, Whisprflow, Locket, comparable) to design, implement, and deliver new experiences.

Own features end-to-end: write PRDs/specs, ship, test, and validate against real users.

0-7 years of software engineering experience with a full-stack range (both backend and frontend). Backend experience (Python, Go, or infrastructure like AWS) AND frontend experience (Type Script/JavaScript/React or modern equivalent). One of the following: 1.5+ YOE at a Tier-1 engineering team (FAANG, YC company, scale-up), ex-founder background, CS degree from an elite school (Ivies, Waterloo, well-respected state schools), or other evidence of greatness (side projects, OSS, etc.).

Open to moving to SF and working Monday-Friday in the office with frequent weekend pushes. US citizen or visa holder. No $100K H-1B.

Built or owned 0→1 product/features from scratch. Early engineer at a startup (roughly #1-15) or worked at an early-stage startup / small product team. LLM APIs shipped in production: prompting, RAG, agents, evals, AI workflows. Data pipeline/ingestion/analytics infra experience (queues, async jobs, webhooks, ETL/ELT, workflow systems). Builds in public: writing, OSS, talks, Show HN, meaningful Git Hub.