Mid-Level Java/Kafka Fullstack Developer in Payments Engineering

Empower Financial Innovation — Redefine Payment Systems with Next-Gen Technology!

Warszawa-based opportunity with hybrid work model

As a Senior Java/Kafka Developer – Payments and Financial Messaging, you will be working for our client, a leader in the financial services industry, dedicated to transforming payment systems and implementing cutting-edge messaging standards. Join a dynamic team focused on adapting legacy applications to non-discretionary ISO20022 standards, enabling secure and efficient financial messaging worldwide. This role offers an exciting pathway for career growth within a forward-thinking organization committed to innovation.

Your main responsibilities:

• Collaborate in requirements gathering sessions with business stakeholders to ensure technical solutions meet business needs
• Analyze, design, and plan impactful technical changes within complex payment systems
• Develop, test, and deploy modifications to legacy applications aligned with ISO20022 standards
• Conduct code reviews, support UAT processes, and assist with seamless code releases
• Apply creative problem-solving to improve the tech stack and optimize system performance
• Reverse engineer complex code bases to implement high-impact modifications effectively

You're ideal for this role if you have:

• Minimum 5 years of professional experience in Java development within financial or payments environments
• Strong expertise in Java, Spring, Hibernate, and DB2
• Experience with Spring Boot, dependency injection, auto-configuration, and Spring Data
• Hands-on knowledge of Apache Kafka (producers, consumers, Kafka Streams, Kafka Connect)
• Familiarity with MongoDB, RESTful API development, and microservices architectures
• Knowledge of containerization tools like Docker
• Proficiency with Git, CI/CD pipelines (preferably GitLab CI)
• Understanding of financial messaging standards such as ISO 20022, SWIFT, CBPR+ or FIN
• Skills in Python scripting (optional but advantageous)
• Past experience in financial services, banking technology, or payments industry is a plus

It is a strong plus if you have:

• Experience with IBM MQ / JMS — queue managers and channels
• Infrastructure as Code expertise — provisioning and managing infrastructure

Language Required for the role:

• Fluent Polish and English communication skills

Eligibility for the role:

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

#MAKEYourCareerBETTER

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.