Senior Java Developer

Senior Java Backend Developer

Location: Kraków, Poland
Work Model: Hybrid — 3 days/week

About the Role

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

The ideal candidate will have 8+ years of hands-on experience in backend application development, with strong expertise in Java and Spring Boot.

This role offers the opportunity to work on enterprise-scale applications, designing and delivering robust, scalable, and high-performance backend solutions.

Key Responsibilities

• Design, develop, and maintain scalable backend applications using Java and Spring Boot.

• Build and enhance RESTful APIs and microservices-based solutions.

• Collaborate with architects, business analysts, QA engineers, and other development teams to deliver high-quality software.

• Participate in system design discussions and contribute to technical architecture decisions.

• Write clean, maintainable, and well-tested code following best practices and coding standards.

• Troubleshoot, debug, and resolve complex technical issues.

• Optimize application performance, reliability, and scalability.

• Participate in code reviews and mentor junior team members where required.

• Contribute to CI/CD implementation and DevOps initiatives.

• Work effectively within Agile/Scrum teams.

Required Skills & Experience

• 8+ years of professional software development experience.

• Strong expertise in Java and Spring Boot.

• Experience designing and developing RESTful APIs and microservices.

• Strong understanding of object-oriented programming principles and design patterns.

• Experience with relational databases such as PostgreSQL, Oracle, or SQL Server.

• Familiarity with messaging technologies such as Kafka, RabbitMQ, or similar.

• Experience with Git, Maven/Gradle, and modern development tools.

• Understanding of CI/CD pipelines and software delivery best practices.

• Experience working in Agile/Scrum environments.

• Strong problem-solving and analytical skills.

• Excellent communication skills in English.

Nice to Have

• Experience with cloud platforms such as Azure, AWS, or GCP.

• Knowledge of containerization technologies such as Docker and Kubernetes.

• Experience with event-driven architectures.

• Financial services or enterprise-scale project experience.

Work Model

Hybrid working model with regular on-site presence 3 days/week required in Kraków, Poland.

Ideal Candidate

If you are a highly skilled Java Backend Developer with strong Spring Boot expertise and a passion for building scalable enterprise applications, we would love to hear from you.