API Developer
Posted Updated
Summary
Designs, builds, and runs secure, scalable APIs and backend services in Java/Spring Boot for an enterprise client, using event-driven architecture and AWS cloud. Hybrid role in Kraków (6 office days/month) via Mindbox, an IT staffing/consulting firm placing engineers on client projects.
At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.
As an API Developer, you’ll design, build, and run secure, scalable APIs that power client’s digital products and internal platforms. Working in a cross-functional engineering team, you’ll contribute to delivering reliable, modern, cloud-native services built on Java and event-driven architecture principles.
Sounds like your kind of challenge?
#LI - Hybrid: 6/month form the office in Kraków
- Hybrid work setup – remote days available depending on the client’s arrangements
- 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
- Hands-on experience building APIs and backend services in Java.
- Solid experience with Spring Boot and build tools (e.g., Maven).
- Strong understanding of backend architecture (data access, caching, resilience, service design).
- Excellent knowledge of API design standards (REST, GraphQL, SOAP).
- Familiarity with API testing and documentation tools (Postman, Swagger UI, OpenAPI, SoapUI).
- Experience with data formats such as JSON, XML, XAML.
- Ability to diagnose and resolve issues, improve performance, and enhance reliability.
- Great communication and collaboration skills — working effectively across teams.
- Experience with event-driven architecture at scale (Kafka Streams, schema registry, idempotency).
- Exposure to AWS cloud infrastructure (EKS, Fargate, RDS, Route 53, etc.).
- Familiarity with CI/CD, observability tools (metrics/logging/tracing).
- Strong analytical thinking and a pragmatic, delivery-oriented mindset.
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.