Jan-hendrik Kuperus
Founder And Director at Yoink!
Utrecht, Utrecht, Netherlands
Summary
👤
Senior🎓
Top SchoolJan-hendrik Kuperus is a seasoned Java-focused software architect and founder with over a decade of experience building resilient, event-driven systems and leading engineering teams across finance, government, and aviation. As Founder and Director of Yoink, he cultivates a learning-first consultancy that pairs senior and junior developers to deliver Java-ecosystem solutions with an eye toward societal and environmental impact. He combines hands-on expertise in Scala, Java, Akka, Axon Framework and cloud-native tooling with practical leadership—having driven mission-critical projects at Rabobank, KLM and the Dutch Police. A former university teaching assistant and frequent conference speaker, he brings a teacher’s instinct for mentorship and tool mastery to client engagements. Skilled at rapid delivery under constraints, he has orchestrated short timelines for regulatory systems and large-scale data processing architectures that integrate event sourcing, streaming and search technologies.
11 years of coding experience
12 years of employment as a software developer
MSc, Computer Science (Formal methods and tools), MSc, Computer Science (Formal methods and tools) at University of TwenteVWO, English, Dutch, German, Mathematics A, Mathematics B, Economics II, Physics, Chemistry, VWO, English, Dutch, German, Mathematics A, Mathematics B, Economics II, Physics, Chemistry at CSG Liudger
English, German, Dutch, frisian
Github Skills (81)
reveal-js10
chaining10
cqrs9
mistral9
sql9
golang9
ollama9
database9
slideshow9
asciidoctor9
llm9
event-sourcing9
cockroachdb9
java9
llama9
Programming languages (11)
Github contributions (5)
Rabobank-Archive/rule-engine
Feb 2016 - Oct 2017
A rule engine supporting forward chaining
Contributions:174 commits, 67 PRs, 100 pushes in 1 year 8 months
chainingrule-engine
jhkuperus/spring-webmvc-profile-conditions
Feb 2015 - Mar 2020
Provides a new annotation @RequireProfile which allows a @RequestMapping's produces-expression to be restricted to certain profiles
Contributions:2 PRs, 10 pushes, 1 branch in 5 years 1 month
requestmappingrestrictedannotation
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