Responsibilities:

- Requirements clarification with customers

- Design & implementation backend web application

- Codebase stabilization (code structure, test coverage, linters, Open API)

- Migration from other technologies to Java (Spring based)

- Performance improvement with active multithreading usage

- Introduce caching

- Introduce separate web API with documentation from scratch

- Unit testing

- Planning process participation

- Team members mentoring

- Code review

Technologies:

- PostgreSQL, MySQL, MongoDB, H2, MSSQL, SQLite, MSSQL;

- JMS, JMX, JMH, JPA, Core Java, Concurrency, Collections, Spring Framework, Tomcat, JDBC API, Servlet API;

- JMeter, JUnit, Mockito, Integration Testing, WireMock, Postman, curl;

- IntelliJ IDEA, JIRA, Confluence;

- GitLab CI, Azure CI/CD;

- Maven, Gradle, Docker;

- Flyway, Liquibase;

- SpringBoot, IoC, Data, Cloud, AOP, JDBC;

- SOLID, ACID, DRY;

- Scrum, KanBan;

- Git;

- JSON, XML, REST, (gRPC, WebSockets);

- ActiveMQ, Apache Kafka;

- Monolith, Service-oriented, Microservices;

- Sonar, PMD;

- Estimations, Planning, Performance improvement