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Backend Java Developer

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Location:
Poland , Warsaw

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

As a Mid-Level Java Developer, you will play a pivotal role in the design, development, and maintenance of high-performance backend systems. You’ll collaborate with product managers, architects, and developers to ensure our solutions are scalable, secure, and future-ready. We encourage the use of Generative AI tools like GitHub Copilot to boost innovation and productivity.

Job Responsibility:

  • Develop robust, configurable applications using Java 17+ and Spring Boot to effectively meet the diverse requirements of multiple customers
  • Ensure the efficiency of PostgreSQL databases for scalable solutions
  • Ensure security, scalability, and performance in all backend solutions
  • Employ Bash/Shell scripting for automation and comprehensive system integration tasks
  • Contribute to application deployment using Docker and Kubernetes, while utilizing Helm for package management
  • Communicate effectively in English (B2/C1 level) within distributed teams
  • Participate actively in scrum events
  • Collaborate with other engineering teams
  • Contribute to design discussions and mentor junior developers

Requirements:

  • Bachelor’s degree in Computer Science or related field, plus 5 years professional backend development experience
  • Master’s degree in Computer Science or related field, plus 3 years professional backend development experience
  • Expertise in Java 17+
  • Proficiency in Spring, Spring Boot, Spring Security
  • Cloud native application development
  • Experience with Maven for project building
  • Experience with SQL databases
  • Proficiency in Git & GitHub (including pipeline development)
  • Knowledge of JUnit, AssertJ and Hamcrest
  • Experience with CI/CD process and tools
  • Kubernetes, Helm
  • Bash/Shell scripting
  • Strong English communication (B2/C1 level)
  • Proven experience in enterprise environments
  • Experience working in Agile teams (Scrum/Kanban)
  • Ability to work independently and collaborate effectively within a distributed team

Nice to have:

  • Experience with PostgreSQL
  • Hibernate/JPA
  • Event-driven architecture & Kafka
  • Microservices architecture principles
  • Python scripting
  • Knowledge of C and/or Go (Golang)
  • Experience with JIRA or similar tools
  • Logging & monitoring tools (Kibana, Grafana, Prometheus)
  • Security best practices (OWASP Top 10, secure coding)

Additional Information:

Job Posted:
February 08, 2026

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