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November 3, 2026

Java Microservices Developer

Senior • On-site

Warsaw, Poland

Quick Facts

Java Microservices Developer focused on building applications in a microservices architecture running on Kubernetes.

Description

Create and develop microservice applications on Kubernetes (K8s), designing solutions using Hexagonal Architecture. Ensure high code quality through unit/integration tests and support application stability, security, and performance. Work with developers and the business in Agile (Scrum), maintaining technical documentation and using AI tools to support development.

Responsibilities

  • Develop and extend applications in a microservices architecture running on Kubernetes (K8s)
  • Design and implement solutions following Hexagonal Architecture principles
  • Write unit and integration tests and maintain high code quality
  • Collaborate with developers and business teams in Agile (Scrum)
  • Own application quality: stability, security, and performance
  • Create and maintain technical documentation
  • Use AI tools practically to support software development

Requirements

  • Minimum 6 years of Java programming experience (Java 8+)
  • Experience building and maintaining microservices
  • Knowledge of Oracle or PostgreSQL
  • Experience working with Kubernetes (K8s)
  • Very good knowledge of Spring / Spring Boot
  • Knowledge of JMS and RabbitMQ queues
  • Knowledge of CI/CD tools (e.g., GitLab, Jenkins)
  • Experience writing unit/integration tests and applying good coding practices (JUnit, Mockito, Testcontainers)
  • Knowledge of Hexagonal Architecture and ability to apply it
  • Practical use of AI tools in the development process (e.g., Copilot, ChatGPT, Sonar + AI, automation)
  • Experience in Agile (Scrum)

Benefits

  • Contribute to building a new product based on modern technologies
  • Real impact on the product development direction
  • Work with an experienced, innovation-friendly development team
  • Daily support from the Architecture team
  • Access to the latest tools, including AI supporting development and programming
  • Work culture based on trust, openness, and responsibility
  • Hybrid work model
  • Organizational culture based on five values: community, simplicity, client-first, responsibility, and credibility
  • Cafeteria-style benefits system (you choose what to use)

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