Arjen is an experienced software engineer with talent and passion for designing simple, yet powerful programming interfaces.

For nearly 20 years, he was a key contributor to the Spring Framework, where he played a vital role in conceiving and developing features such as @Controller, functional web endpoints, and Spring’s suite of HTTP clients—including RestTemplate, WebClient, and RestClient.

Today, Arjen leverages his deep expertise to help organizations improve the design, development and growth of their APIs, and help navigate the open-source ecosystem. He also specializes in reducing code complexity, offering pragmatic guidance to teams aiming for more maintainable and efficient software.