- participated in the development and support of the core functionality using Java 11, Spring Framework, Spring Boot, JOOQ and PostgreSQL and optimized its performance, increasing throughput by ≈25%- participated in the design of an API using the REST architectural style of interaction- participated in the development of back-end services, which allowed to reduce the load on the application- configured support for data caching using Redis, which reduced overall response time- participated in the development of a service for synchronizing data from PostgreSQL to Elasticsearch using Kafka and Debezium- customized monitoring support using Prometheus and Grafana- designed database schemas, wrote and optimized SQL queries- implemented containerization process using Docker to simplify the deployment process

- participated in the development of core functionality on microservice architecture using Java 17, Spring Framework, Spring Boot, Spring Cloud, Hibernate and PostgreSQL- configured data caching support using Redis to reduce overall response time- organized asynchronous communication between services using RabbitMQ- participated in the development of reused Spring Boot-starters for logging HTTP requestsand exception handling- designed separate sections of the database schema and wrote SQL queries- covered code with unit and integration tests using JUnit, Mockito and Testcontainers