Jildert Miedema is a Co-founder and Senior Developer based in Amsterdam with 12 years of hands-on back-end experience, specializing in DDD, Kotlin, Java and Spring Boot. He builds reliable B2B systems and purchase/sales workflows, having run his own consultancy and co-founded Juntos to deliver production-grade services. His background in biomedical engineering and early work on an eye-blink controlled wheelchair reflect a practical, systems-oriented mindset that surfaces in robust architecture and test-driven practices. As a contributor to the widely used oauth2-client library, he improved test coverage and reliability around token handling—evidence of his attention to quality in open-source ecosystems. Colleagues describe him as an entrepreneurial engineer who moves from hardware-rooted prototypes to scalable server-side solutions while keeping operational resilience front and center.
12 years of coding experience
13 years of employment as a software developer
Ing, Electro engineering / Medical engineering, Ing, Electro engineering / Medical engineering at Noordelijke Hogeschool Leeuwarden
Msc, Biomedical Engineering, Msc, Biomedical Engineering at Eindhoven University of Technology
Easy integration with OAuth 2.0 service providers.
Role in this project:
QA Engineer / Test Automation Engineer
Contributions:15 commits in 1 month
Contributions summary:Jildert primarily contributed to improving the testing suite within the OAuth2 client library. Their work involved adding tear-down methods to existing test classes for various providers like Eventbrite, Instagram, and Facebook, ensuring proper test environment cleanup. They also fixed test counts and adapted tests to ensure they passed, demonstrating a focus on test coverage and reliability. Furthermore, they added and modified tests related to token expiration and access token handling.
Contributions:4 commits, 1 push, 1 comment in 3 years 6 months
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Jildert Miedema - Co-founder & Senior Developer at Juntos