Senior Java Developer

About the Position

Senior Java Developer

IT & Product Development

Warsaw

Full Time

We are looking for a Senior Java Developer to join our team in Warsaw, Poland, and work on Germany’s largest loyalty program.

Responsibilities

• Develop and maintain a large-scale Java application running in the cloud.
• Analyze business requirements and production issues to design robust and maintainable solutions.
• Work within a complex enterprise monolithic application and contribute to its continuous evolution.
• Own features end-to-end, from requirements analysis through implementation, testing, deployment, and production support.
• Collaborate closely with business stakeholders, product teams, and other engineers.
• Communicate technical concepts and solution proposals clearly to both technical and non-technical audiences.
• Create and maintain automated tests to ensure software quality and support continuous delivery.
• Document architectural decisions, design concepts, and implementation approaches.
• Participate in code reviews and contribute to engineering best practices.

Requirements

• 7+ years of professional experience in backend software development.
• At least 5 years of hands-on experience with Java in large-scale enterprise applications and complex codebases.
• Strong experience maintaining and evolving large monolithic systems in a production environment.
• Solid knowledge of Java, Spring/Spring Boot, object-oriented design principles, and clean code practices.
• Experience working with AWS Cloud or another major cloud provider.
• Strong understanding of application architecture, performance optimization, and maintainability.
• Experience with automated testing, including unit and integration tests.
• Familiarity with CI/CD pipelines and modern software delivery practices.
• Excellent communication skills and ability to collaborate with technical and business stakeholders.
• Fluent English (B2+) spoken and written.
• Ownership mindset with a strong focus on delivering business value.
• Ability to navigate complex legacy and modern codebases and drive improvements pragmatically.
• Experience working in Agile development teams.

Nice to Have

• Experience with large enterprise monoliths undergoing modernization.
• Knowledge of relational databases and SQL performance tuning.
• Experience with Docker and cloud-native deployment practices.
• Experience mentoring developers and supporting technical growth within the team.

We Offer

• Employment contract
• Corporate incentive program
• Sport card
• Private medical care
• Lunch card with cooperation extended and permanent contract
• Hybrid working model (2 days a week from home)
• Opportunity to work 100% remotely, also from European countries for 15 days a year
• Flexible working hours (start between 7 to 10)
• Trainings to develop hard and soft skills
• Convenient location at Rondo Daszyńskiego, with remote work options
• No rigid dress code, sneakers are welcome
• Friendly atmosphere at work
• Open communication is our priority

About the Company

At PAYBACK, people are the most important asset. We offer a dynamic and supportive environment where you can grow and thrive. Join us and be part of a team that values innovation, collaboration, and excellence.

Don't wait! Send your CV and apply now.