Mid-Level Java API Developer – Cloud-Native Backend Services

Our requirements

• At least 4 years of experience building APIs and backend services in Java
• Strong experience with Spring Boot and Maven development tooling
• In-depth understanding of backend architecture, including service design, data access, caching, and resilience patterns
• Knowledge of API standards such as REST, GraphQL, and SOAP
• Familiarity with API tooling like Postman, Swagger UI/OpenAPI, SoapUI
• Comfort working with JSON and XML data formats
• Proven ability to diagnose issues, fix defects, and enhance system reliability
• Excellent collaboration skills and clear technical communication

Optional

• Experience with event-driven architecture at scale (Kafka streams, schema registry, idempotency, exactly-once/at-least-once delivery)
• Hands-on experience building and operating services on AWS (Kubernetes/EKS, Fargate, Redis, RDS, S3)
• Knowledge of CI/CD pipelines, observability tools (logging, metrics, tracing), and secure coding practices
• Strong critical thinking with a pragmatic, delivery-oriented mindset

Your responsibilities

• Build and evolve high-performing, scalable APIs and backend services using Java, Spring Boot, Maven, primarily in IntelliJ
• Collaborate with engineers, product owners, architects, and testers to deliver well-designed services aligned with business goals
• Design APIs following industry standards and patterns (e.g., REST, GraphQL, SOAP), ensuring versioning and backward compatibility
• Integrate with third-party and internal APIs, focusing on resilience, observability, and error handling
• Develop and support event-driven services using Kafka, including topic design, schema evolution, and message reliability
• Build cloud-ready services on AWS platforms such as Kubernetes/EKS, Fargate, Redis, RDS, S3, and Route 53
• Write automated tests, perform API testing, troubleshoot production issues, and contribute to continuous quality improvements
• Maintain clear API documentation (OpenAPI/Swagger) and create runbooks as needed
• Contribute to engineering standards focused on security, performance, and maintainability

About the project

This is how we organize our work

This is how we work on a project

• Continuous Deployment
• Continuous Integration

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What we offer

• Stable and long-term cooperation with very good conditions.
• Enhance your skills and develop your expertise in the financial industry.
• Work on the most strategic projects available in the market.
• Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years.
• Participate in Social Events, training, and work in an international environment.
• Access to attractive Medical Package.
• Access to Multisport Program.
• Access to Pluralsight.
• Flexible hours.

Benefits

• sharing the costs of sports activities
• private medical care
• flexible working time
• fruits
• integration events
• corporate gym
• saving & investment scheme
• no dress code
• coffee / tea
• drinks
• christmas gifts
• birthday celebration
• sharing the costs of a streaming platform subscription
• access to +100 projects
• access to Pluralsight

Recruitment stages

• 1.
  online interview
• 2.
  online interview

ITDS Polska Sp. z o.o.