Senior Full-Stack Developer for Real Estate Platform

I'm building a back-office management platform for real estate brokerage offices in Qatar and Saudi Arabia, covering deal tracking, commission and split management, client contracts with e-signing, compliance alerts, and a companion mobile app for brokers. I have a complete technical specification and build checklist ready to share. I'm looking for a senior full-stack developer with a strong track record for a substantial multi-module build. Experience with Supabase/Postgres, modern frontend frameworks, native mobile development, and Arabic/RTL interface experience is important. Work will be delivered in milestones, with a technical reviewer verifying each milestone against the spec before moving forward. Please share relevant past projects, especially those involving multi-tenant SaaS, CRM, or real estate platforms.