Founding Product Engineer

Company: Seamflow Inc.
Apply for the Founding Product Engineer
Location: London
Job Description:

WHO WE ARE LOOKING FOR

You will fit right in if you have experience with:

  • Product Engineering — Design and build end-to-end user workflows, from UI to backend logic and data
  • User Experience — Translate complex real-world processes into clear, intuitive interfaces
  • Frontend — Build production-grade UI using modern frontend frameworks (React, TypeScript)
  • Backend — Implement APIs, business logic, and data models that support complex workflows
  • AI Integration — Design and integrate AI-powered features (LLMs, agents, model-backed APIs) into user workflows
  • Product Judgment — Be opinionated about what to build, what not to build, and when to ship
  • Ownership — Build fast and ship production-grade systems with high ownership

WHAT YOU WILL DO

  • Ship from Day 1 — Deploy to production immediately and own real product surface area
  • Own it end-to-end — Create specs, figure things out, and build features end-to-end
  • Solve real problems — From UX polish to backend logic to jumping on customer calls

WHAT WE ARE LOOKING FOR TECHNICALLY

  • Strong experience with TypeScript and modern frontend frameworks (React or equivalent)
  • Comfortable building backend services in Python
  • Experience integrating AI systems (LLMs, agents, model-backed APIs) into production products
  • Ability to reason about complex workflows, not just CRUD

Strong plus if you have:

  • Founder or ex‑founder experience
  • Early-stage or stealth startup background
  • Founder fellowships or similar environments (EF, YC, Antler, etc.)
  • Experience building AI-powered products in production
  • Experience working where requirements were unclear and evolving

YOUR FIRST MONTH

  • Ship to production from day one
  • Own problems end-to-end, from definition to deployment
  • Do what needs doing, including UX polish, debugging, and customer interaction

WE OFFER

  • Pace and purpose — In‑person in London (visa sponsorship available)
  • No friction — Relocation, visas, meals, and tools fully covered
  • A tight‑knit team — High standards, high trust, no politics

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Posted: June 14th, 2026