Mobile Application Developer wanted for long-term relationship

The work Mid-sized mobile and web apps (Flutter, React, Supabase, GCP) Designs and HTML are provided for every app. You get the Figma files and the front-end markup - your job is to turn them into a working, tested app and hand it over. $400 fixed price per app. No hourly. An average app should take you under one week. That's the bar. We build these ourselves at this pace with the same tooling, so we know it's achievable - we're looking for someone who can match it. Volume: we can send 1-5 apps per week to the right person, so you'd be running several builds in parallel. Who we're looking for You already build with AI as your primary workflow - Claude Code, Cursor, Codex or similar - running the latest frontier models, not last year's. You should be able to tell us exactly which models and tools you use and why. Very strong fundamentals: you know when the model is wrong and fix it fast. Clean architecture, working auth, sane data models, no half-finished features. Flutter and/or React with Supabase. AWS is a plus. You ship. Days, not weeks. You've done this repeatedly and can show it. Fluent written English, responsive, comfortable working async with a UK team. How we'll start One paid test build at the standard $400 fixed price. If the quality and speed are there, we move straight to a weekly pipeline. Long-term, high-volume relationship for the right person. Budget $400 per app, fixed. Milestone-funded through Upwork, released on handover.