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August 8, 2026

Senior Java Developer

Senior • Hybrid

135 - 145 PLN

Warsaw, MZ, Poland

Java Developer (Kafka) 

📍 Warsaw | Hybrid model (only 1-2 days per month in the office)

We are looking for a Java Developer to join a project within the focused on the development and maintenance of systems that process large volumes of real-time data.

Responsibilities

  • Preparing and configuring development environments.

  • Developing and implementing new functionalities.

  • Creating and modifying database structures.

  • Designing and executing unit and integration tests.

  • Developing and performing performance tests.

  • Ensuring that implemented changes comply with system architecture and quality standards.

  • Participating in code reviews and quality assurance activities.

  • Preparing solutions for deployment, including code repository management, configuration updates, and deployment documentation.

Requirements

  • Commercial experience in Java development.

  • Experience working with systems that process large volumes of real-time data.

  • Hands-on experience with Apache Kafka.

  • Experience creating and executing unit and integration tests.

  • Knowledge of relational databases.

  • Understanding of software development best practices and quality standards.

Nice to Have

  • Knowledge of the Java Swing library.

  • Experience developing and maintaining desktop applications based on Java Swing.

What We Offer

  • Hybrid work model with only 1-2 days per month in the Warsaw office.

  • Opportunity to work on modern, real-time data processing systems.

  • Long-term cooperation in a stable project environment.

  • Collaboration with experienced professionals and opportunities for professional growth.

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