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