- Built and owned backend modules for a product, focusing on business logic, maintainability and performance.

- Optimized existing functionality to improve performance and reducing unnecessary allocations.

- Designed and implemented custom event-driven system using internal tooling.

- Actively collaborated directly with the product owner in sprint planning: clarified requirements, identified edge cases, and flagged technical risks before implementation.

- Developed async microservices integrated with a monolith via RabbitMQ.

- Implemented Transactional Outbox pattern and idempotent consumer in notification service to guarantee reliable delivery and prevent duplicate notifications.

- Refactored legacy code: broke tightly coupled logic into services, improved testability.

- Integrated multiple crypto exchange APIs with fallback handling for timeouts and failures

- Covered services with unit tests.