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December 17, 2025

Backend Java Developer (with Frontend tasks)

Senior • Hybrid

$32,000 - $42,000/

Warsaw, Poland

Backend Java Developer (with Frontend tasks)


We are looking for a strong Java backend engineer experienced with Spring and Kafka. The role may include 10–20% frontend involvement (mainly code review), or can be fullstack for candidates with React/Angular skills. The position is heavily backend-focused. Experience in Trading or Reporting is a plus.


Responsibilities

  • Build and maintain backend services using Java, Spring, Hibernate.

  • Work with relational databases (T-SQL, SQL Server).

  • Develop solutions involving streaming, cloud, and containerized technologies.

  • Provide occasional support for frontend work (JavaScript/TypeScript, React).

  • Participate in architecture discussions and collaborate with other tech teams.


Requirements

  • 4+ years of experience in Java development.

  • Strong skills in Java, Spring Framework, and SQL.

  • Experience with Kafka.

  • Good communication and problem-solving abilities.

  • Proactive, reliable, and committed to high standards.