Next.js + Supabase Integration Developer — HouseCall Pro + HubSpot Wiring (Frontend Already Built)

Looking for a senior full-stack developer to handle the backend integration layer for an internal sales tool. The frontend is fully built (Next.js + Tailwind + Supabase). I need someone to wire it up to HouseCall Pro and HubSpot APIs. Stack: Next.js (App Router) + Tailwind CSS Supabase (Postgres, Auth, RLS) HouseCall Pro API HubSpot API Google Places API (already integrated) Scope: The app is a 6-step quote wizard for a home services company. All UI is complete. Integration work includes: Customer search + create/update flows against HouseCall Pro and HubSpot (never duplicate, always update) HubSpot contact property writes at key events (creation, lead save, estimate send, closed sale) HouseCall Pro estimate creation with line items HouseCall Pro job creation on confirmed sale Drive-time-based tech scheduling logic (read pre-computed cache, apply availability rules) Background pre-compute job for tech schedules + Google Distance Matrix Reuse of an existing webhook middleware repo (will be shared) A detailed integration scope document (~10 pages) will be shared with serious applicants after initial vetting. Requirements: Strong Next.js + Supabase experience (please share examples) Prior experience with HouseCall Pro or HubSpot API is a major plus Comfortable with TypeScript Available to start this week (non-negotiable) US/EU timezone preferred for overlap Timeline: ASAP — looking to kick off within days and ship in 2-3 weeks. Only apply if you can start immediately and dedicate significant hours. To apply, please include: A short note on your relevant experience (skip generic cover letters — I won't read them) One example of a similar API integration project you've shipped Your estimated timeline and rough quote range based on the scope above (final quote after reviewing the full scope doc)