Back-End Engineer - Java (Payments)

Capco Group; Warszawa; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Hybrid work model

Office in Warsaw

Job summary

Capco Poland is seeking an experienced Back-End Developer to design, develop, and maintain scalable financial services applications using Java and Spring Boot. You will work on payment solutions, RESTful services, and cloud-enabled microservices in a collaborative engineering team.

You will collaborate with product owners and QA in an Agile environment, optimize database access with PostgreSQL, and apply best practices for security, reliability, and performance in AWS deployments.

Qualifications

• 5–10 years of hands-on experience in Java and Spring Boot.
• Strong understanding of object-oriented programming, microservices, RESTful APIs, and modern back-end development principles.
• Practical experience with PostgreSQL including design and query optimisation.
• Hands-on experience with AWS cloud services and cloud-based applications.

Responsibilities

• Design, develop, and deliver scalable, secure back-end services using Java and Spring Boot.
• Collaborate with the Agile Team to coordinate technical activities and deliver outcomes.
• Develop and maintain RESTful APIs, microservices, and integrations with PostgreSQL databases and AWS services.
• Deliver clean, maintainable, and testable code, with adherence to engineering standards.

Skills

Java

Spring Boot

RESTful APIs

Microservices

PostgreSQL

AWS

Team collaboration

Tools

Docker

Kubernetes

CI/CD pipelines

JUnit

Mockito

Job description

*We are looking for Poland based candidate.

AtCapco 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

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