Java Backend Engineer (Contract)
6 months
Fully remote (EU)
Rate: 250–300 EUR/day
We are looking for an experienced Java Backend Engineer to join a cross-functional delivery team building a modern data integration layer for a healthcare technology platform. The team is responsible for designing and scaling a GraphQL API layer that connects multiple product domains and unlocks new data workflows. This is a hands-on role with strong engineering standards and autonomy over technical decisions.
Responsibilities
Design and build GraphQL and REST APIs with strong performance and clean domain boundaries
Develop JVM-based services using Spring Boot and modern engineering practices
Own services through design, implementation, deployment, monitoring and optimisation
Work closely with Product, QA and DevOps to deliver features end-to-end
Implement best practices for secure, reliable and maintainable code
Contribute to performance tuning, caching strategies, pagination, resilience patterns and service health
Participate in code reviews and knowledge sharing within the team
Required skills
Solid hands-on experience with Java (11+) and Spring Boot in production
Strong understanding of concurrency, collections and JVM fundamentals
Experience with RESTful APIs; GraphQL experience beneficial
SQL and NoSQL experience (e.g., PostgreSQL, MySQL, MongoDB, Redis)
Familiarity with Kafka or RabbitMQ for event-driven integration
Comfortable with CI/CD pipelines and cloud environments (AWS/Azure/GCP)
Strong testing mindset (unit, integration, contract) and automation awareness
Understanding of OAuth2/OIDC, JWT and general security patterns
Familiarity with observability tools (OpenTelemetry, Prometheus, Grafana, ELK etc.)
Nice to have
Previous work with healthcare or regulated environments
Experience in distributed systems or platform teams
Experience mentoring or supporting engineering peers
Offer
6-month contract
Fully remote work within the EU
Daily rate 250–300 EUR depending on experience
Opportunity to work with a modern architecture and high-impact domain
Ideal Start: ASAP
Availability: EU-based contractors only