About this role

API Developer Mindbox Sp. z o.o. Daily tasks: - Design, build, and maintain scalable APIs and backend services using Java, Spring Boot, Maven - Collaborate closely with product owners, architects, and testers to deliver high-quality, business-aligned solutions - Design APIs following industry standards (REST, plus GraphQL/SOAP where applicable) ensuring versioning, backward compatibility, and resilience - Integrate internal and third-party APIs with robust error handling and observability - Build event-driven services with Kafka or similar: manage topics, schema evolution, and message reliability - Deploy on AWS using EKS/Kubernetes, Fargate, Redis, RDS, S3, Route 53 - Maintain quality through automated testing, performance tuning, and production support in line with the “you build it, you run it” principle - Produce API documentation using OpenAPI/Swagger and update runbooks as needed - Contribute to security-by-design practices and continuous improvement Musts: Java, Spring Boot, Maven, API, REST API, GraphQL, SOAP, Postman, Swagger, OpenAPI, SoapUI, JSON, XML, Service design Proven back-end development experience in Java Strong hands-on expertise with Spring Boot and build tools (e.g., Maven) Solid knowledge of API architecture and integration patterns (REST, GraphQL, SOAP) Experience with common API tools like Postman, Swagger/OpenAPI, SoapUI Familiar with data formats ( JSON, XML ) and backend fundamentals (caching, resilience, service design) Ability to diagnose issues, optimize performance, and deliver reliable solutions Great collaboration skills and clear technical communication Nice to Have Experience with event-driven architecture and Kafka at scale Familiarity with AWS cloud services (Kubernetes/EKS, Fargate, Redis, RDS, S3, Route 53) Understanding of modern CI/CD pipelines, security practices, and observability tools Strong analytical mindset with a pragmatic, delivery-focused approach Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions.

We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference. At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe. We’re seeking an API Developer with strong Java expertise to work within a cross-functional engineering team , responsible for delivering secure, high-performing services at scale. You’ll be working with modern Java, Spring Boot , and cloud-native patterns including API-first design and event-driven architecture on AWS.

Sounds like your kind of challenge? #LI- Hybrid – 8 days per month from the office in Kraków What you get in return Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.) Hybrid work setup – 8 days per month from the office in Kraków Collaborative team culture – work alongside experienced professionals eager to share knowledge Continuous development – access to training platforms and growth opportunities Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more High quality equipment – laptop and essential software provided

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