Senior Java Backend Developer / Krakow

Senior Java Backend Developer

Location: Kraków, Poland Work Model: Hybrid - 3 days per week in the office

About the Role

We are looking for an experienced Senior Java Backend Developer to join a technology team in Kraków.

The ideal candidate will have 10+ years of professional experience in backend development, with strong expertise in Core Java, Spring Boot, and microservices architecture.

You will work on enterprise-scale applications, contributing to the design, development, and maintenance of scalable and reliable backend solutions within a modern technology environment.

Key Responsibilities

• Design, develop, and maintain backend applications using Core Java and Spring Boot.
• Build and enhance REST APIs and microservices.
• Work with relational databases, including PostgreSQL and Oracle.
• Develop and deploy containerized applications using Docker and Kubernetes.
• Work with Azure cloud services and Unix-based environments.
• Participate in technical design discussions and contribute to architectural decisions.
• Troubleshoot issues and ensure application performance, stability, and maintainability.
• Collaborate with cross-functional teams in an Agile environment.
• Participate in code reviews and follow software development best practices.

Required Skills & Experience

• 10+ years of professional software development experience.
• Strong knowledge of Core Java.
• Hands-on experience with Spring Boot.
• Solid experience developing microservices.
• Experience with relational databases, particularly PostgreSQL and/or Oracle.
• Experience with Docker and Kubernetes.
• Practical experience with Microsoft Azure.
• Experience working in Unix/Linux environments.
• Strong problem-solving and analytical skills.
• Good communication skills in English.

Nice to Have

• Experience with Sybase databases.
• Experience in enterprise-scale application development.
• Familiarity with CI/CD pipelines and Agile/Scrum methodologies.

Ideal Candidate

A senior backend developer with strong Core Java and Spring Boot expertise, hands-on microservices experience, and practical knowledge of databases, containerization, Azure, and Unix environments.