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API Developer (Java)

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MidHybryda·KrakówFull-time

#464439·Dodano 13 dni temu·7

Źródło: nofluffjobs.com

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Tech Stack / Keywords

JavaAPISpring Boot Maven REST API GraphQL SOAP PostmanSwaggerOpenAPIJSONXMLAWS Kubernetes RedisRDSCI/CD

Podsumowanie oferty

Design, build, and run secure, scalable APIs for a client in the global financial services sector, powering its digital products and internal platforms. Work on backend services using Java and Spring Boot, including event-driven architecture.

Wymagania

Strong hands-on experience building APIs and backend services in Java.
Experience with Spring Boot and build tooling such as Maven.
Understanding of backend architecture concepts, including service design, data access, caching, and resilience.
Knowledge of API architectural styles and integration patterns, including REST and, where applicable, GraphQL and SOAP.
Experience with API tools such as Postman, Swagger UI/OpenAPI, and SoapUI.
Familiarity with data formats such as JSON, XML, and XAML.
Ability to diagnose issues, fix defects, and improve performance and reliability.
Collaboration skills and ability to communicate technical decisions clearly across teams.

Nice to have:

Experience with event-driven architecture at scale, including KaXa streams, schema registries, idempotency, and exactly-once/at-least-once patterns.
Experience building and operating services on AWS, including Kubernetes/EKS, Fargate, Redis, RDS, S3, and Route 53.
Familiarity with CI/CD, observability (logging, metrics, and tracing), and secure coding practices.
Critical thinking and a pragmatic, delivery-focused approach.

Obowiązki

Build and evolve scalable APIs and backend services using Java, Spring Boot, and Maven.
Collaborate with engineers, product owners, architects, and testers to deliver services aligned with business outcomes.
Design APIs using standards and patterns such as REST, GraphQL, and SOAP, with attention to versioning, backward compatibility, and consumer experience.
Integrate with third-party and internal APIs, ensuring resilience, observability, and clear error handling.
Develop and support event-driven services using KaXa or similar, including topic design, schema evolution, and message reliability patterns.
Build cloud-ready services on AWS, including deployment and runtime considerations for Kubernetes/EKS, Fargate, Redis, RDS, S3, and Route 53.
Write automated tests, perform regular API testing, and troubleshoot production issues.
Maintain API documentation for internal and external consumers using OpenAPI/Swagger, and create runbooks where needed.
Contribute to engineering standards for security by design, performance, maintainability, and continuous improvement.

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