Mobile music application built with Java and XML, focused on reliable playback UX, clean navigation, and production delivery.
- Java
- XML
- Android
- UI/UX
- Google Play
- Published a real mobile product to Google Play
- Implemented maintainable code structure and reusable UI patterns
- Improved app usability through practical debugging and flow refinement
Multi-venue ordering and payment platform with real-time kitchen workflow and role-based admin operations.
- Next.js
- Node.js
- PostgreSQL
- Docker
- Yookassa
- Stripe
- Handled multi-venue workflows and live kitchen updates
- Improved session reliability and checkout completion
- Delivered secure payment flows and reconciliation
Personal Spring Boot application focused on payment orchestration, validation, testing, and production-ready architecture.
- Java
- Spring Boot
- PostgreSQL
- JUnit
- Docker
- Layered architecture with strong validation and error handling
- Integration tests and CI pipeline for release confidence
- Ready for live deployment and demo usage
Backend-first service for real-time events with WebSocket broadcasting, persistence, and resilient delivery.
- Java
- WebSocket
- Redis
- PostgreSQL
- Docker
- Designed event pipeline for low-latency updates
- Implemented retry-safe delivery and durable message storage
- Improved observability with structured logs