API Developer

Nasze wymagania: 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 Mile widziane: 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 O projekcie: 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? Zakres obowiązków: 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 Note: Detailed project information will be shared during the recruitment process. Oferujemy: Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.) Hybrid work setup – 8 days a 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