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.