Backend Developer · Java & Spring Boot · Istanbul, Turkey

Open to backend roles · Available from April 2026

I build backend systems the way I'd want to use them — clean, intentional, and properly thought through. I got into coding because designing a system to solve a real problem feels like a game to me: analyze the rules, then play by them as elegantly as possible. When someone tells me "this way is cleaner," I want to understand it all the way down and apply it properly — not just move on. Every project I build, I treat as a product. I care about both the developer experience and the user side. If it's worth building, it's worth building right. Currently focused on Java/Spring Boot, microservices architecture, and event-driven systems.

Primary — what I build with

Explored in projects

Observability

Game dev (senior thesis project)

A production-style distributed e-commerce system built to explore cloud-native microservices patterns end to end.

• 6 independent services — product, order, inventory, notification, API gateway, frontend
• Spring Cloud (Eureka, Gateway, OpenFeign) for service discovery and routing
• Apache Kafka for async inter-service communication — fully event-driven
• Keycloak + OAuth2 for centralized SSO and stateless security
• Resilience4j for circuit breaking and retry logic
• Full observability stack — Prometheus, Grafana, Loki, Tempo (metrics, logs, distributed tracing)
• Testcontainers + WireMock + JUnit for integration testing
• Docker & Kubernetes for containerization and orchestration

Java 21 Spring Boot 4 Kafka Keycloak PostgreSQL MySQL MongoDB Flyway Docker K8s

A full-featured library API where both borrowing rules and admin workflows are properly modeled — not just CRUD.

• Users can borrow up to 3 books at a time, must return within 1 month
• Unreturned books are automatically marked as lost via scheduled jobs
• Penalty system — first offense: half borrow duration; second offense: access revoked
• Advanced filtering by author, genre, publisher, title
• Admin-only Excel export of available / borrowed / lost book records
• RBAC with Spring Security + JWT — fine-grained role separation
• Liquibase for database migrations and versioning

Java 17 Spring Boot PostgreSQL JWT Liquibase Spring Scheduler Apache POI

REST API handling session management, seat reservation, and complex booking business logic.

• Session and showtime management with conflict prevention
• Seat reservation with real-time availability checks
• Custom Enum Serialization and WebMvcConfigurer for standardized API responses
• Dockerized for environment portability

Java Spring Boot PostgreSQL Docker Swagger

A 2D Metroidvania game built with a 3-person team as my senior thesis project.

• Led a 3-person team, managing tasks and timelines via Trello to ensure milestones were met.
• Designed and implemented core game mechanics and system integrations
• Handled Git/GitHub workflow and technical coordination across the team
• Responsible for testing, debugging, and gameplay balancing

Unity C# 2D Metroidvania