Arnout Engelen
Independent at Engelen Open Source
Overijssel, Netherlands
Summary
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Rockstar🎓
Top School
Top expert inScala Ecosystem and Reactive Programming
Arnout Engelen is an open source-focused security and infrastructure engineer with 24 years of experience building reliable, reproducible systems and improving supply-chain security across diverse projects. He combines hands-on development—ranging from build tooling and CI/CD automation to backend and DevOps work—with program-level coordination as Security Response Program Manager for the Apache Software Foundation. Comfortable in Linux/NixOS ecosystems, he has contributed to notable projects like Akka, Scala 3, OpenSSF Scorecard and the CVE Binary Tool, often improving testing, determinism and dependency hygiene. As an independent consultant he helps organizations harden their software supply chains and make complex builds reproducible, while still finding time to play sax, run, and explore creativity at hackerspace Hack42. A pragmatic collaborator, he’s equally at ease mentoring contributors as he is aligning multi-project security processes across large open source communities.
24 years of coding experience
21 years of employment as a software developer
Master of Science (MSc), Computer Science, Master of Science (MSc), Computer Science at Radboud Universiteit Nijmegen
Dutch, English
Stackoverflow
6,808reputation
2.3mreached
141answers
17questions
java
top-5%
akka
top-5%
regex
top-5%
network-programming
top-5%
Github Skills (100)
dependency-management10
vulnerability-management10
python10
dependency-analysis10
testing10
http10
sbom10
websocket10
security-automation10
javas10
consul10
websockets-client10
build-automation10
backend10
client-websocket10
Programming languages (37)
Github contributions (5)
akka/akka-http
Oct 2017 - Sep 2022
The Streaming-first HTTP server/module of Akka
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:16 releases, 377 reviews, 384 commits in 4 years 10 months
Contributions summary:Arnout primarily contributed to the akka-http project by implementing and testing features related to caching directives. The contributions included adding new functionalities to existing directives for features such as caching and rejections, as well as improving examples of the java and scala APIs. Furthermore, the user integrated tests, and worked on supporting various http protocols and data.
http-clienthttp2streamingakka-httpwebsocket
akka/akka-samples
May 2017 - Jan 2021
Akka Sample Projects
Role in this project:Back-end Developer
Back-end DeveloperContributions:3 reviews, 55 commits, 56 PRs in 3 years 9 months
Contributions summary:Arnout primarily focused on updating and adapting existing Akka sample projects, specifically for version upgrades and the implementation of new features. They updated project dependencies, including the core Akka libraries and related tools like Camel and persistence layers, ensuring compatibility with new versions. Furthermore, they introduced a new sample demonstrating cluster sharding, showcasing their understanding of distributed systems and Akka's clustering capabilities. The user also added a Java version of the sharding sample.
sample-projectsplayframeworkakka-streamsscalaakka
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