April 29, 2026

Senior Java Developer – Payment Terminal Management System

Senior • Hybrid

21,840 - 24,360 PLN

Warsaw, Poland

Ignite innovation in enterprise systems — architect the future of payment terminal management!

Warszawa-based opportunity with hybrid work model.

As a Senior Java Developer – Backend and System Integration, you will be working for our client, a leader in terminal management systems, focused on managing extensive payment terminals across diverse hardware vendors. You will help design and implement scalable IT solutions that enhance system integration and optimize business processes, contributing to cutting-edge financial technology.

Your main responsibilities:

  • Design and implement IT solutions based on analytical and technical documentation.
  • Review and create technical documentation for system components.
  • Perform system upgrades and work with legacy code, including reverse engineering.
  • Define and build test cases for automated testing frameworks.
  • Collaborate on system integration projects using REST, SOAP, RMI, and database links.
  • Contribute to migration efforts from TMS to RTMS components.
  • Work with distributed systems, message queues (RabbitMQ), and application servers (WildFly/JBoss).
  • Support vulnerability assessments and ensure system security compliance.

You're ideal for this role if you have:

  • At least 4 years of experience in Java development and system integration.
  • Very good knowledge of Java 8+ and object-oriented programming.
  • Practical experience with Spring, Spring Boot, Hibernate/JPA, and JEE frameworks.
  • Hands-on experience with RabbitMQ and relational databases, especially Oracle.
  • Proficiency in RESTful API design and distributed systems.
  • Familiarity with application servers (WildFly/JBoss) and version control (Git, Maven, Jenkins, GitLab CI/CD).

It is a strong plus if you have:

  • Experience with scanning tools like Fortify or Sonatype.
  • Knowledge of Hazelcast for distributed caching.

Language Required for the role:

  • Fluent Polish and English, at least B2 level.

Eligibility for the role:

  • Only candidates with an existing legal right to work in the European Union will be considered for this role.

#MAKEYourCareerBETTER

Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.