Sole engineer building a mobile application end-to-end: React Native client, NestJS REST API, PostgreSQL database, and AWS infrastructure. Responsible for architecture decisions, implementation, and deployment, from initial concept through App Store release.
Lead front-end engineer for an Angular PWA with 100K+ monthly users over 4 years. Key achievements: browser caching reducing image traffic by 50%, state management refactor from O(n) to O(1) lookup, Angular migrations (v11→v19), and >60% test coverage. Also mentored developers and led code reviews.
Personal finance app from concept to Play Store. Installment tracking, recurring costs, category projections.
Pro bono WordPress site for an animal sanctuary. Payment integration, adoption system, volunteer registration.