Senior Java Developer | Baltic States and Poland Citizen (remote) | Contract

Job Description

• Be part of a Core Banking team modernizing and supporting mission-critical services for a leading banking platform. You will deliver new features, reduce technical debt, and ensure regulatory compliance using Java 11/17+, Spring Boot, REST APIs, and microservices on highly available, enterprise-scale systems. Expertise with Kafka, Oracle Database, and event-driven architectures is key to maintaining resilient integrations with digital channels.
• Key Responsibilities: Design, build, and maintain Java microservices with Spring Boot and JPA/Hibernate. Develop and integrate REST/SOAP services and Kafka-based messaging solutions. Optimize SQL queries and ensure performance on Oracle Database. Contribute to core banking transformation and legacy-modernization initiatives. Collaborate in Agile/Scrum teams, providing technical leadership and code reviews. Ensure high availability, resilience, and regulatory compliance across distributed systems.
• Must-Have Requirements: 5+ years of enterprise Java development (Java 11/17+). Deep Spring Framework / Spring Boot expertise. Proven experience with REST APIs, microservices, and event-driven architectures. Hands-on with JPA/Hibernate, Maven or Gradle. Proficiency in Kafka (or similar messaging) and Oracle Database performance tuning. Solid grasp of core banking architecture, integration patterns, and high-availability design. Experience in production-critical financial environments and Agile/Scrum delivery. Fluent English plus strong analytical and stakeholder-communication skills.
• Nice to Have: Exposure to core banking platforms such as Oracle FLEXCUBE, Temenos T24, Finacle, Mambu, or Thought Machine. Experience with Git, CI/CD pipelines, Kubernetes/OpenShift, and AWS / Azure / GCP. Knowledge of Domain-Driven Design (DDD), automated testing, and ISO 20022 / SWIFT standards. Background in core banking migration or transformation programs.
• €40 - €50 an hour
• We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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