Java Solution Architect – Cloud & Monolith Modernization

Payback PL; Warszawa; Hybrid; PLN 180,000 - 280,000; Full time

Benefits offered by this job

Corporate incentive program

Sport card

Private medical care

Lunch card funding

Job summary

Payback PL is seeking an experienced senior backend engineer to develop and maintain a large-scale Java application in a cloud environment. You will own features end-to-end, collaborate with cross-functional teams, and contribute to automated testing and continuous delivery.

The role requires strong Java/Spring Boot skills, AWS experience, and fluent English. You will work within a hybrid setup, with collaboration across business stakeholders and engineers to improve legacy and modern codebases.

Qualifications

• 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.

Responsibilities

• Develop and maintain a large-scale Java application running in the cloud for Germany’s largest loyalty program.
• Analyze business requirements and production issues to design robust and maintainable solutions.
• 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.

Skills

Java

Spring Boot

AWS Cloud

CI/CD

Agile

English (B2+)

Communication

Code Reviews

Tools

Docker

SQL

Job description

Payback PL is seeking an experienced senior backend engineer to develop and maintain a large-scale Java application in a cloud environment. You will own features end-to-end, collaborate with cross-functional teams, and contribute to automated testing and continuous delivery.

The role requires strong Java/Spring Boot skills, AWS experience, and fluent English. You will work within a hybrid setup, with collaboration across business stakeholders and engineers to improve legacy and modern codebases.