Back-End Engineer - Java (Payments)

CAPCO POLAND *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 #LI-HYBRID