Senior Java Engineer - EU

Job Description:

• Design, build and maintain backend services with Java and Spring Boot
• Develop REST APIs and event-driven integrations with Kafka
• Write clean, tested code and participate in code reviews
• Work with architects and product owners to break down requirements and estimate work
• Support production issues and improve performance and reliability
• Build and modernize backend platforms with Java, Spring Boot and microservices
• Deliver production features end to end in a Java microservices environment

Requirements:

• 6+ years of professional backend development with Java
• Java 11+; strong in Java 8+ features such as streams and lambdas
• Solid Core Java: OOP, design patterns, collections, multithreading and concurrency
• Production experience with Spring Boot and microservices architecture
• REST API design and integration
• Relational databases and SQL (PostgreSQL, Oracle or similar)
• Event streaming or messaging with Kafka or similar
• Git, CI/CD pipelines (e.g. Jenkins) and Docker
• Unit and integration testing (JUnit, Mockito)
• Fluent English for daily work with the client
• Based in Spain or Poland with the right to work there
• Nice to have: experience in banking, payments or other financial services
• Nice to have: AWS or another major cloud provider
• Nice to have: Kubernetes
• Nice to have: Hibernate / JPA
• Nice to have: frontend exposure with React or Angular
• Nice to have: experience on consulting or client-facing projects

Benefits:

• People-first company culture
• Supportive, trusted and empowered work environment
• Distributed team / remote work
• Meaningful products and lasting partnerships
• Opportunities to collaborate with architects and product owners
• Client-facing work in English