API Developer

Our requirements

• 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

Optional

• 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

Your responsibilities

• 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.

About the project

This is how we organize our work

This is how we work on a project

• Continuous Deployment
• Continuous Integration

What we offer

• 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

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of professional training & courses
• life insurance

Mindbox Sp. z o.o.