Lead Systems Architect / Master Full-Stack Developer (Long-Term Contract)

Job Description We are seeking a Lead Systems Architect (“Master Developer”) for a long-term partnership to design, secure, and deploy a suite of proprietary applications. We are starting with Phase 1: a sophisticated podcast + fintech platform, followed by multiple mobile and web applications that will share core architecture, services, and infrastructure. This is not a short-term freelance task. We are building a multi-app ecosystem and need someone who can own system architecture, security, scalability, and deployment across all phases. Budget PKR 100,000 – 200,000 (Fixed) Timeline: 5 weeks Responsibilities Architect and build end-to-end systems (frontend, backend, mobile) Migrate existing React/Vite frontend into Capacitor + Supabase Build a reusable @core library (Auth, Wallet, Ledger) for future apps Implement background audio at OS level (iOS & Android) Design secure financial ledgers (append-only, immutable) Implement HLS streaming with tokenized / signed access Set up CI/CD pipelines and secure deployments Perform a 48-hour technical audit of existing internal code Identify and report frontend limitations or blockers Work under strict milestone review and validation Required Skills (Senior / Master Level Only)Full-Stack React (Advanced) TypeScript Node.js Backend & Data Supabase (deep experience required) PostgreSQL Real-time data synchronization Mobile Capacitor or React Native Single codebase for iOS & Android Native handling: AVAudioSession (iOS) Foreground Services (Android) Media & Streaming Background audio playback Lock-screen & interruption handling HLS streaming Fintech & Security Stripe Connect (subscriptions & payouts) Immutable financial ledgers DevOps CI/CD pipelines Automated testing Cloud infrastructure Architecture Modular, reusable, white-label-ready code Shared core services across multiple applications App Publishing (Mandatory) You must already be able to build and publish apps to: Apple App Store Google Play Store Experience handling App Store rejections is required. Legal Requirements (Non-Negotiable) NDA required IP Assignment / Work-for-Hire agreement required All work is owned exclusively by the Client NDA & IP apply to anyone on your team If working under a company, full company details must be provided Apply now by submitting your application exactly as instructed above. Applications that do not follow the required format will not be considered. Job Type: Contract Application Question(s): Have you personally handled an Apple App Store rejection? What was the reason and how did you resolve it? How do you ensure podcast audio continues playing when the screen is locked or the user switches apps? How do you structure reusable core systems (Auth, Wallet, Ledger) for multiple future apps? Work Location: Remote