Junior Java Developer

For our client, a leading technology infrastructure company, we are looking for a Junior Java Developer to help build mission‑critical systems that power global data center operations. You will be part of developing innovative solutions that manage the entire lifecycle of data center infrastructure, from initial planning and design to ongoing maintenance and optimization. As a Junior Developer, you will work alongside world‑class engineers and architects to build scalable, high‑performance platforms while learning cutting‑edge technologies and gaining deep domain expertise in data center operations.

This role offers a hybrid model, with 3 days per week working from the client’s office in Wroclaw, Gdansk, or Krakow, Poland.

• Develop new features and enhance existing applications for data center management systems.
• Refine and optimize the existing codebase to improve readability, efficiency, and maintainability.
• Learn project domain knowledge and master relevant technologies under the guidance of senior developers.
• Participate in the full software development lifecycle, from analysis and design through implementation and support.
• Communicate directly with client stakeholders on a daily basis to understand requirements and provide updates.
• Collaborate with world‑class engineers and architects to build scalable, high‑performance platforms.
• Contribute to building solutions that enable external customers to develop next‑generation applications.
• Work effectively within a modern, self‑governing engineering team environment.
• Participate in code reviews and testing processes to ensure high‑quality deliverables.
• Support the troubleshooting and maintenance of production systems.

• 1+ years of experience developing and integrating software through the full system implementation lifecycle.
• 1+ years of hands‑on programming experience in Java.
• Practical experience with the analysis, design, implementation, build, test, and support phases of software development.
• Proficiency with the JUnit framework for writing and executing unit tests.
• Hands‑on experience with Mockito for creating mocks within unit tests.
• Solid understanding of SQL and working with relational database interactions.
• Strong self‑management abilities and skill in prioritizing tasks effectively.
• Capability to work independently while being an active part of a collaborative team.
• Eagerness to learn new technologies and gain deep domain knowledge.
• Strong problem‑solving skills with a keen attention to detail.
• Excellent English communication skills with proven experience in client‑facing interactions.
• Nice to have:
  Experience with Google Cloud Platform (GCP) services and cloud‑native development practices.
• Knowledge of Type Script for contributing to frontend development tasks.