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Senior Software Engineer - Java Engineer (Remote) - €400 A Day - Remote
Job Title: Senior Java Developer (API & Legacy Modernisation)
Location:
Remote – SpainRate:
€400 per dayContract:
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 microservicesLead and contribute to
legacy system modernisation
initiativesWork closely with architects, product owners, and DevOps teams to deliver high-quality solutionsImprove system performance, reliability, and maintainabilityContribute to technical design, code reviews, and engineering best practicesSupport integration with internal and external financial systemsEnsure 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 HaveExperience with containerisation (Docker, Kubernetes)Event-driven architectures (Kafka or similar)Experience with domain-driven design (DDD)
Why Join?Competitive €400/day
rateFully remote role within PolandLong-term 6-month rolling contractOpportunity to work on high-impact modernisation projects in financial services
or continue with email
Location:
Remote – SpainRate:
€400 per dayContract:
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 microservicesLead and contribute to
legacy system modernisation
initiativesWork closely with architects, product owners, and DevOps teams to deliver high-quality solutionsImprove system performance, reliability, and maintainabilityContribute to technical design, code reviews, and engineering best practicesSupport integration with internal and external financial systemsEnsure 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 HaveExperience with containerisation (Docker, Kubernetes)Event-driven architectures (Kafka or similar)Experience with domain-driven design (DDD)
Why Join?Competitive €400/day
rateFully remote role within PolandLong-term 6-month rolling contractOpportunity to work on high-impact modernisation projects in financial services
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