Senior Java Developer – TMS

ITDS is hiring for a Warsaw-based Senior Java Developer role to work on the Terminal Management System (TMS), a complex platform managing over 300,000 payment terminals. The system includes two major components: TMS (WildFly-based) and RTMS (Spring Boot-based), integrating with multiple internal and external systems and undergoing regular security scanning.

• At least 5 years of professional experience in Java development.
• Strong knowledge of Java 8+ and object-oriented programming.
• Experience with independent design, implementation, documentation, and testing of application components.
• Practical knowledge of Spring / Spring Boot, Hibernate/JPA, and JEE frameworks.
• Practical knowledge of message queue systems, particularly RabbitMQ.
• Practical experience with Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, and Jira.
• Knowledge of relational databases, in particular Oracle.
• Practical experience with RESTful API design and system integration.

Nice to have:

• Experience with distributed systems.
• Experience with application servers, especially JBoss/WildFly.
• Knowledge of scanning tools such as Fortify and/or Sonatype.

• Design and implement IT solutions based on analytical and technical documentation.
• Review analytical documentation and translate requirements into technical direction.
• Create and maintain technical documentation to support development and quality assurance.
• Perform technical upgrades of existing systems, improving stability and maintainability.
• Work with legacy code, conducting enhancements while preserving functional correctness.
• Conduct reverse engineering using existing source code, documented business processes, and UI/database access.
• Define and build test cases for automated testing to ensure reliable releases.

Only candidates with an existing legal right to work in Europe will be considered for this role.