Sourcing/Purchasing Application (For TOFAŞ)

• Developed backend APIs with ASP.NET Core and supported weekly deployments, database management, and Windows server administration; also used Docker, RabbitMQ, Elasticsearch, and Kibana.

• Contributed as a backend developer to a B2B SaaS billing platform built with Java, Spring Boot microservices, using PostgreSQL, Redis, RabbitMQ, Elasticsearch, Kibana, Docker, Kubernetes, and Eureka Server. • Worked primarily on backend development within the telecommunications billing domain, where billing runs for millions of customers. • Took part in deployment and CI/CD pipelines with Jenkins, Nexus, and ArgoCD.

• Contributed to a Java / Spring Boot rating system that processes millions of usage records, with a focus on performance optimization and scalable operation, using Docker, Redis, Eureka Server, RabbitMQ, Elasticsearch, Kibana, and Drools.