Arjen Wisse
Software Architect at Mendix
Utrecht, Netherlands
Summary
👤
Senior🎓
Top SchoolArjen Wisse is a pragmatic Software Architect with 14 years of experience designing and hands-on building scalable backend systems, currently leading the Mendix Runtime architecture from Utrecht. He blends deep technical expertise in Java and Scala with operational experience in cloud integrations (AWS, PCF), clustering, and migrating stateful systems to stateless, high-availability architectures. At Mendix he helped create the R&D Architecture practice, chairs the Product Architecture Board, and drove a patent-pending workflow engine upgrade mechanism—demonstrating both strategic leadership and implementation ownership. His contributions to the widely used JUnit project show a continued focus on improving developer experience and test reliability. Analytical, perseverant and observant, he frequently pairs architecture work with code-level improvements to reduce organizational friction and speed delivery.
14 years of coding experience
21 years of employment as a software developer
De WittenbergBachelor, Advanced Informatics (specialized in technical informatics), Java, C++, UML, Software analysis, Software design, Bachelor, Advanced Informatics (specialized in technical informatics), Java, C++, UML, Software analysis, Software design at Avans Hogeschool TilburgHavo, Havo at Calvijn College
English, Dutch
Github Skills (8)
unit-testing10
javas10
junit10
exception-handling10
java10
test-automation10
tdd9
hamcrest9
Programming languages (10)
Github contributions (5)
junit-team/junit4
Jan 2012 - May 2012
A programmer-oriented testing framework for Java — :warning: maintenance mode
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:8 commits, 1 comment in 4 months
Contributions summary:Arjen primarily focused on improving the JUnit testing framework. Their contributions involved enhancing the `ExpectedException` rule by adding the actual exception's details to the error message for more informative test results. Further work included refactoring and relocating code within the `ExpectedExceptionRuleTest` and creating new matchers and tests for validating exceptions, leading to more robust test coverage within the JUnit framework. These changes indicate a focus on improving the framework's testing capabilities and error reporting.
javamaintenance-modetesting
mendix/wa-sqlite
Jan 2024 - Sep 2025
WebAssembly SQLite with experimental support for browser storage extensions
Contributions:1 review, 1 PR, 81 pushes in 1 year 7 months
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