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WISE INTEGRATION

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

Posted 3 days ago
€40 - €50 per hour
5-10 years experience
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AI Summary

Design, build, and maintain Java microservices while contributing to core banking transformation and legacy modernization. Collaborate within Agile teams to ensure high availability, performance, and regulatory compliance of mission-critical systems.

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 BootREST APIs, and microservices on highly available, enterprise-scale systems. Expertise with KafkaOracle Database, and event-driven architectures is key to maintaining resilient integrations with digital channels.

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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 APIsmicroservices, and event-driven architectures.
  • Hands-on with JPA/HibernateMaven 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 FLEXCUBETemenos T24FinacleMambu, or Thought Machine.
  • Experience with GitCI/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.


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€40 - €50 an hour
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