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Jonatan Mars

Investment management mobile app with KYC, document signing, portfolio tracking, and multi-platform deployment.

Mobile Developer · 2025-present jonatanmars.com
React Native Expo Supabase React Query SumSub PostHog

Full-featured fintech mobile app for managing investment portfolios and strategies. Built with React Native + Expo for iOS, Android, and web from a single codebase.

Supabase handles the backend: PostgreSQL database, auth, edge functions, and file storage. Implemented SumSub for KYC verification, signature canvas for legal documents, PDF generation for investment reports, and data visualization with react-native-graph.

The app has a comprehensive data management layer: database migrations, seeding, import scripts, and custody holdings sync. PostHog for analytics, Sentry for error tracking, GitHub Actions + EAS for CI/CD.

Highlights

  • KYC verification (SumSub)
  • Document signing & PDF generation
  • Supabase backend
  • Cross-platform (iOS/Android/Web)

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