Back-End Engineer - Java (Payments)

• We are looking for Poland based candidate.

At Capco Poland, we’re not just another consultancy - we’re the spark behind digital transformation in the financial world. As a global leader in technology and management consulting, we thrive on helping clients tackle the toughest challenges across banking, payments, capital markets, wealth, and asset management.

Build scalable, secure back-end solutions and help shape the future of payment technology.

The Role

At Capco, we're looking for an experienced Back-End Developer to provide specialist development services for a project within the financial services and payments industry. You'll collaborate with the Team, contributing to the design, development, and enhancement of modern back-end applications and services supporting business-critical payment solutions.

This engagement offers the opportunity to apply your Java and Spring Boot expertise, work with PostgreSQL and AWS cloud technologies, and deliver reliable, scalable, and high-performance solutions within a collaborative engineering environment.

What You’ll Do

• Design, develop, and deliver scalable, secure, and high-quality back-end services using Java 25 and Spring Boot 4.
• Collaborate with the Agile Team, including developers, product owners, QA engineers, and other stakeholders, to coordinate technical activities and deliver agreed project outcomes.
• Develop and maintain RESTful APIs, microservices, and integrations with PostgreSQL databases and AWS cloud services.
• Deliver clean, maintainable, and testable code, contributing to technical reviews and applying established engineering standards.
• Analyse and resolve technical challenges, optimise application and database performance, and contribute to improvements in system reliability, security, and scalability.

What We’re Looking For

• Around 5-10 years of hands-on expertise in Java and Spring Boot, including knowledge of Java 25 and Spring Boot 4.
• Strong understanding of object-oriented programming, microservices architecture, RESTful APIs, and modern back-end development principles.
• Practical experience with PostgreSQL, including database design, SQL query optimisation, and efficient data management.
• Hands-on experience with AWS cloud services and developing or integrating cloud-based applications.
• Ability to deliver technical solutions independently while collaborating effectively with cross-functional teams in Agile or Scrum project environments.

Bonus Points For

• Experience delivering technology solutions within financial services, payments, or transaction-processing environments.
• Familiarity with AWS services such as ECS, EKS, Lambda, RDS, S3, or CloudWatch.
• Experience with containerisation technologies such as Docker and Kubernetes, alongside CI/CD pipelines and automated deployment processes.
• Knowledge of automated testing frameworks such as JUnit, Mockito, and integration testing tools.
• Understanding of event-driven architecture, messaging technologies such as Kafka, and application monitoring and observability practices.

B2B cooperation in a hybrid model, with the option to provide services from the Warsaw office to the extent agreed based on project needs.

Recruitment Process

• HR Interview with the recruiter
• Technical Interview
• Client Interview
• Feedback and offer