About the Project

Our client is a European payments organization undergoing a major digital transformation focused on modernizing its core transaction‑processing platform. The team is building a modern microservices‑based environment designed to increase scalability, reliability, and performance across high‑volume payment operations.

Technology stack in use: Java 21 (Spring Boot 3), OpenShift / Kubernetes, Apache Kafka / Rabbit MQ for streaming and queuing, MongoDB, Oracle Database, multiple DevOps tools for development, automation and monitoring.

Work mode: hybrid, 3-4 per week from Cracow office

Key Responsibilities:

· Design, develop and support testing payment services features together with the team.

· Resolve issues by troubleshooting and root cause analysis and support in production issue analysis when needed.

· Ensure high quality via unit testing and code reviews.

· Demo and document the results of work in demo sessions.

Required Experience & Skills:

· At least 3 years on similar position

· Technical knowledge in at least some of the technologies used is needed.

· Java development skills are the most relevant.

· Understanding of microservices architecture and distributed systems.

· Familiarity with API design principles.

· Fluent English

Additional Valuable Skills:

· Experience in designing and implementing high-throughput, low-latency systems capable of handling large data volumes

· Groovy, Maven, Jenkins

· Knowledge of the Card Processing domain

· Documentation and use of Jira/Confluence

· Excellent communication and coordination skills

We offer

Ongoing support from a dedicated agent who is caring about your project continuity, contact with clients, necessary formalities, work comfort, and development.
Career Development Program – advice on career planning based on the latest trends and market needs in IT, including consultations with career agents and mentors.
Access to 7N Learning & Development – a development and educational platform offering webinars, a library of articles and industry reports, and frequent invitations to both one-time and recurring events focused on technical, business, and lifestyle topics.
Spectacular events, both for you (e.g., annual Kick-Off trip, Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g. family picnics),
Professional growth Professional growth beyond your current project. You can actively engage in knowledge sharing through the 7N Services offering, designed for 7N clients.
Connections and access to the expertise of top IT professionals in the market – the average professional tenure of our consultants in Poland is over 10 years,

A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad

Java Developer

7N