Job Title: Senior Java Developer (API & Legacy Modernisation)

Location: Remote – Spain
Rate: €400 per day
Contract: 6-month rolling contract

About the Role

We’re looking for an experienced Senior Java Developer to join a financial services programme focused on modernising legacy platforms and building high-quality APIs. This is a long-term contract opportunity for someone who thrives in complex enterprise environments and enjoys transforming legacy systems into scalable, modern architectures.

Key Responsibilities
- Design and develop robust, secure, and scalable Java-based APIs and microservices
- Lead and contribute to legacy system modernisation initiatives
- Work closely with architects, product owners, and DevOps teams to deliver high-quality solutions
- Improve system performance, reliability, and maintainability
- Contribute to technical design, code reviews, and engineering best practices
- Support integration with internal and external financial systems
- Ensure solutions meet security, compliance, and regulatory standards

Required Experience & Skills




- 10+ years of Java development experience
- Strong experience in API development (RESTful services, microservices architecture)
- Proven track record in legacy platform modernisation and refactoring
- Solid knowledge of:
- Spring / Spring Boot ecosystem
- Microservices and distributed systems
- Cloud platforms (AWS, Azure, or GCP)
- CI/CD and DevOps practices
- SQL and NoSQL databases
- Experience working in financial services / banking / fintech environments
- Strong understanding of security, scalability, and high-availability systems
- Excellent communication skills and ability to work in distributed teams

Nice to Have
- Experience with containerisation (Docker, Kubernetes)
- Event-driven architectures (Kafka or similar)
- Experience with domain-driven design (DDD)

Why Join?
- Competitive €400/day rate
- Fully remote role within Poland
- Long-term 6-month rolling contract
- Opportunity to work on hig

📌 Senior Java Software Engineer (Ye)
🏢 Oliver Bernard
📍 Ye