Senior Java Developer

We are looking for an experienced Senior Java Developer to join an international team working on modern digital solutions for the travel and aviation industry . You will be involved in developing scalable backend solutions that support digital customer journeys, online booking, additional services and travel management. What we offer: Private healthcare Multisport, Hybrid working model (from Kraków), Work on a modern product used in the travel & aviation industry International environment and experienced engineering team Opportunity to influence technical solutions and architecture B2B contract Long-term cooperation and opportunities for professional growth

Daily tasks

• Developing and maintaining backend applications using Java
• Designing and developing REST APIs and integrations
• Working with microservices architecture
• Taking part in technical design and architectural decisions
• Building scalable, reliable and high-quality solutions
• Collaborating closely with frontend developers, QA, DevOps and other technical specialists
• Participating in code reviews and knowledge sharing
• Contributing to the continuous improvement of development practices

Requirements

Our requirements: 5+ years of professional experience in backend development Strong knowledge of Java and Spring / Spring Boot Solid experience with REST APIs Practical experience with microservices Experience working with relational databases Good understanding of software development best practices, testing and CI/CD Experience building scalable and reliable applications Good command of English Ability to work independently and take ownership of technical solutions Nice to have: Experience working in the travel, aviation or e-commerce industry Experience with cloud platforms such as AWS, Azure or GCP Knowledge of event-driven architecture and messaging systems (e.g. Kafka ) Experience with Docker, Kubernetes and modern deployment practices Familiarity with AI-powered development tools (e.g. GitHub Copilot, Claude Code, Cursor) or experience using AI to improve engineering workflows Experience integrating AI/LLM-based solutions into applications

Experience working in international and distributed engineering teams

Must have: Java, Spring Boot, REST API, Relational database

Nice to have: Cloud platform, AWS, Azure, Docker, Kubernetes, GitHub, AI