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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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