Full Stack Developer (React, TypeScript, Supabase) – Freelance

About the role

Hayah Health is looking for an experienced full‑stack developer to perform an immediate technical audit of its preventive health platform and to help finish and extend key product features. The work will start with a few days of security, data‑model and error‑handling review, then continue on‑site in Doha to build out the admin console, member screens and AI‑driven assistance.

Key responsibilities

• Conduct a thorough security and data‑integrity audit, focusing on row‑level security, error handling and edge cases.
• Collaborate on‑site to complete and enhance the admin console, member portrait, protocol screens and the check‑in loop.
• Integrate the Claude API to deliver personalized assistance based on each member’s plan.
• Provide technical guidance to the non‑technical founder, explaining trade‑offs and rejecting unsuitable ideas.

Required profile

• Based in Doha and able to work on‑site.
• Proven experience shipping and maintaining production React/TypeScript applications with Supabase/PostgreSQL.
• Comfortable handling sensitive health data and understanding privacy‑by‑design principles.
• Ability to work with an AI‑generated codebase without rewriting it.

Required skills

• React
• TypeScript
• Supabase (including row‑level security)
• PostgreSQL
• Claude API integration