"Build the APIs that unlock the power of data."
We are seeking an experienced API Developer with strong expertise in Java and Spring Boot to design and implement robust, scalable, and secure APIs. The ideal candidate will have a solid understanding of API development best practices, microservices architecture, and performance optimization. Reporting to the Head of Data, you will be part of a team of Developers and Data Engineers that work closely with our delivery team to create a scalable and performant data accessibility platform.
Design, develop, and maintain RESTful APIs using Spring Boot and tools like Restdocs or Springdoc.
Ensure API security, scalability, and high availability.
Implement unit and integration tests to ensure API reliability and performance.
Optimize API performance and troubleshoot production issues.
Maintain detailed technical documentation for API endpoints and usage.
Work with containerization and deployment tools for smooth API delivery.
Minimum 5 years of experience as an API developer;
Strong proficiency in Java and Spring;
Experience with asynchronous programming and performance tuning in Java;
Knowledge of OAuth2, JWT, and other authentication/authorization standards;
Deep understanding of RESTful API principles, HTTP methods, and best practices;
Experience working with containerization(Docker, Kubernetes), and cloud platforms (AWS, Azure, GCP);
Familiarity with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB);
Familiarity with CI/CD pipelines, version control (Git), and automated testing;
Knowledge of API documentation tools like OpenAPI/Swagger.
Nice-to-Have Skills:
Experience with GraphQL or gRPC;
Familiarity with microservices architecture and service orchestration;
Familiarity with API platforms, such as KONG;
Understanding of event-driven systems using Kafka, RabbitMQ, or similar tools;
Basic knowledge of DevOps practices and infrastructure-as-code tools (Terraform, Ansible).
Key Qualities:
Strong problem-solving and analytical thinking;
Excellent collaboration skills and ability to work in technical and cross-functional teams;
Ability to work independently and manage multiple priorities;
Motivated to learn and embrace new technologies;
Fluent in English (spoken and written) mandatory.
What Altares – Dun & Bradstreet offers you:
Alongside an informal, educational, and dynamic work environment, we also offer:
Competitive salary with an attractive bonus;
Hybrid working: partly at the office, partly at your favorite home workspace;
Working in a data-driven and innovative company;
A modern office in an iconic location in the heart of Rotterdam;
Access to a free gym, swimming pool, and sauna;
An incredibly fun and professional team where you can continue to grow;
Access to LinkedIn Learning and internal training programs;
And last but not least: Our “Fun & Bradstreet” events committee regularly organizes drinks, sports events, and other fun team outings.
Are you already interested in the API Developer position? Apply as soon as possible and don’t forget to include your motivation letter!
If you have any questions about this vacancy, let us know!
Altares Dun & Bradstreet does not accept unsolicited CVs from external recruiters.
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Hi, my name is Thirza and I'm the HR Recruiter at Altares. For questions about this position, or other things you'd like to ask me, feel free to reach out.
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Altares has been awarded the 'Great Place to Work' certification. This means that we prioritize a good, healthy work-life balance and are willing to go the extra mile for our employees.
At Altares Dun & Bradstreet, we place a high value on personal growth and development. Throughout the year we have various pathways to get the best out of yourself. For example, we have a Young Talent Program in which we give talented colleagues the opportunity to develop further in the workplace. We also have a Leadership Development Program. Here (new) leaders learn how they can best stimulate their team and achieve good results together. Guest speakers are also regularly invited to various teams and there are regular events.
"When we travel abroad with the whole company, there are always a few colleagues who add a few extra days before or after the trip together. It's pretty unique to get along so well with so many colleagues that you actually choose to spend your holidays and free time together. I think that says a lot about the great work atmosphere here."
Henrica Westhoeve - Marketing
