> Markdown version of [/jobs/ext/1946900-java-api-developer-flexible-hours-rest-openapi-focus](https://www.wearedevelopers.com/jobs/ext/1946900-java-api-developer-flexible-hours-rest-openapi-focus). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Java Api Developer - Flexible Hours, Rest & Openapi Focus - **Company:** Utimaco Safeware Ag - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Java Platform Enterprise Edition (J2EE), Swagger, Openapi, Api Design, Restful APIs - **Published:** August 6, 2026 - **Apply:** https://www.buscojobs.com.es/java-api-developer-flexible-hours-rest-openapi-focus-en-madrid-ID-365701294 ## About the Role You will design, code, verify, test and document APIs to integrate 3rd party software with Utimaco products.The role requires 3-5+ years in API development, strong Java/J2EE skills, and experience with OpenAPI and Swagger tools. A university degree in CS or similar is expected, with excellent English communication and a collaborative, agile mindset. #J-*****-Ljbffr ## Description Utimaco Safeware AG in Madrid, Spain seeks an API-focused software engineer to implement, integrate, and document REST API frameworks for GP HSMs.You will design, code, verify, test and document APIs to integrate 3rd party software with Utimaco products.The role requires 3-5+ years in API development, strong Java/J2EE skills, and experience with OpenAPI and Swagger tools.A university degree in CS or similar is expected, with excellent English communication and a collaborative, agile mindset.#J-*****-Ljbffr ## Related Videos - [For the REST of us: API First and Conway’s Law](https://www.wearedevelopers.com/videos/1932-for-the-rest-of-us-api-first-and-conway-s-law) - [Using code generation for test automation – the fancy way](https://www.wearedevelopers.com/videos/230-using-code-generation-for-test-automation-the-fancy-way) - [API Design - Getting Started](https://www.wearedevelopers.com/videos/33-api-design-getting-started) - [API = Some REST and HTTP, right? RIGHT?!](https://www.wearedevelopers.com/videos/1675-api-some-rest-and-http-right-right) - [Awful APIs: A History Lesson in Industry Mistakes and Mishaps](https://www.wearedevelopers.com/videos/759-awful-apis-a-history-lesson-in-industry-mistakes-and-mishaps) - [Contract-First Frontend: Scaling Reliable UIs with OpenAPI and AI](https://www.wearedevelopers.com/videos/1995-contract-first-frontend-scaling-reliable-uis-with-openapi-and-ai) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)