Valerii S.

I build and maintain production-grade cross-platform apps across social, fintech, healthcare, and e-commerce — from greenfield builds to complex legacy codebases that need a serious cleanup. Over the past 5+ years I've shipped real-time chat and social apps, document management systems, invoicing platforms, booking and appointment apps, and humanitarian-aid tools — covering the full lifecycle: architecture decisions, backend (Supabase, Firebase, REST API) integration, and deployment via TestFlight, Google Play Console, Firebase Hosting, and App Store Connect. What I bring to a project: - Legacy code rescue — refactoring outdated Provider-based apps into clean, scalable Bloc architectures without breaking production - Independent ownership — comfortable gathering requirements directly, running technical kick-off discussions, and writing detailed code audits and estimations (15–25 page reports) for both new and inherited codebases - Backend integration — Supabase, Firebase (Auth, Firestore, Storage, Cloud Functions, Remote Config), REST APIs, Stripe, RevenueCat, Google Maps, biometric auth, push notifications, and more - Clear communication — I flag risks early, give realistic estimates, and keep clients updated without micromanagement