Senior Java/Kafka Developer – Payments and Financial Messaging

Ignite innovation in payments — shape the future of financial messaging and transaction processing!

Warszawa-based opportunity with hybrid work model (up to 2 remote days per week).

As a Mid-Level Java/Kafka Fullstack Developer in Payments Engineering, you will be working for our client, a leader in financial services, dedicated to transforming payments technology and standards. You will contribute to critical projects that adapt legacy systems to implement the latest ISO20022 messaging standards, enabling seamless and efficient global transactions. Join us to influence the evolution of financial messaging and career growth in a cutting-edge environment.

Your main responsibilities:

• Collaborate in requirements gathering sessions with business users to ensure technical solutions meet strategic objectives.
• Analyze, design, and plan solutions focused on adapting legacy applications for ISO20022 standards.
• Develop, test, and deploy high-quality code, participating actively in code reviews and facilitating UAT and release processes.
• Reverse engineer complex codebases to identify points for impactful improvements and optimize system performance.
• Contribute to the evolution of the tech stack, advocating best practices and innovative solutions.
• Ensure seamless integration of Kafka, Spring Boot, MongoDB, and other technologies within microservices architecture.
• Maintain high standards for code quality, security, and performance in a distributed environment.
• Collaborate effectively in a global team, sharing knowledge and technical insights.

You're ideal for this role if you have:

• 4+ years of professional experience in software development, with a focus on backend and full-stack solutions.
• Strong proficiency in Java, Spring frameworks, Hibernate, and DB2.
• Hands-on experience with Apache Kafka—including producers, consumers, Kafka Streams, and Connect.
• Knowledge of MongoDB and experience with RESTful API development.
• Familiarity with event-driven/microservices architectures and Docker containerization.
• Experience with Git, CI/CD pipelines (preferably GitLab CI), and multi-module project management with Maven.
• Understanding of financial messaging standards such as ISO20022, SWIFT, CBPR+, or FIN is a strong plus.
• Optional skills: IBM MQ/JMS, Python scripting, Infrastructure as Code, and experience in payments or banking technology.

Language required for the role:

• Polish (Communicative level)
• English (Communicative level)

Eligibility for the role:

• Only candidates with an existing legal right to work in the European Union will be considered for this role.

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Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.