Responsibilities & Achievements

• Designed and implemented new microservices using Spring Boot as part of a distributed system.
• Participated in service decomposition, splitting monolithic and overloaded services into smaller, more maintainable microservices.
• Took part in Kafka scaling and tuning, improving throughput and stability under increased load.
• Optimized application performance by reducing the number of external and internal service calls and improving request flow.
• Analyzed and optimized database queries, significantly decreasing response times and system load.
• Implemented Saga pattern for managing distributed transactions and ensuring data consistency across microservices.
• Developed and maintained inter-service communication using Feign clients.
• Built and maintained Grafana dashboards to monitor system health, performance metrics, and business indicators.
• Reduced overall application error rate by identifying bottlenecks, fixing edge cases, and improving error handling.
• Actively participated in production support, incident investigation, and post-incident analysis.
  Tech stack
  Java 17-21
  Spring Boot
  Apache Kafka
  Feign
  Oracle DB
  Lombok
  Microservices
  SAGA
  Grafana/AKHQ

Responsibilities & Achievements

• Investigated and resolved critical memory leaks in a production Java application, significantly improving application stability and reducing runtime failures.
• Participated in root cause analysis of performance and memory issues using heap dumps and JVM monitoring tools.Implemented Swagger Codegen to automatically generate REST API clients and server stubs, improving API consistency and reducing manual boilerplate code.
  Tech stack:
  Java 8
  Spring Framework
  Hibernate JPA Oracle DB
  Swagger / Swagger Codegen
  SOAP (WSDL), REST
  SVN, Git