Jeroen Vermeulen
Freelance Webdeveloper & Hosting Expert at DeoVero BV
Retie, Antwerp, Belgium
Summary
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Senior🎓
Top SchoolJeroen Vermeulen is a freelance web developer and hosting expert with 13+ years designing high-performance, secure Magento and Shopware platforms and running Kubernetes- and PHP-based infrastructures. He has led technical teams as CTO at Savvii and built hosting automation and BGP-enabled infrastructure from the ground up, combining low-level Linux and network expertise with pragmatic product-focused engineering. An active open-source contributor, Jeroen has improved Magento malware scanning rules and contributed display drivers to the widely used Tasmota firmware, showing a rare blend of web security and embedded-systems work. Customers praise his direct communication and ability to make complex performance and security trade-offs easy to understand, enabling teams to sleep well during high-traffic events like Black Friday. Based in Retie, Belgium, he prefers direct client engagements and brings a track record of preventing hacks, optimizing caching (Varnish/ESI) and squeezing maximum reliability from dedicated hosting.
13 years of coding experience
29 years of employment as a software developer
HAVO Dutch English Physics Economics Chemistry Scientific Math, HAVO Dutch English Physics Economics Chemistry Scientific Math at Hertog Jan College / Were Di CollegeHBO / Bachelor Information Engineering (H.I.), HBO / Bachelor Information Engineering (H.I.) at Fontys University of Applied SciencesHBO / Bachelor Information Engineering (H.I.), HBO / Bachelor Information Engineering (H.I.) at Eindhoven University of TechnologyElementary School reading writing spelling math geography history English natural sciences crafts drawing, Elementary School reading writing spelling math geography history English natural sciences crafts drawing at St. Nicolaasschool Valkenswaard
Dutch, English, French, German
Stackoverflow
11reputation
9kreached
1answer
0questions
Github Skills (27)
caching10
firmware10
it-security10
magento10
esp826610
security10
tasmota10
iot10
php10
driver10
malware10
varnish10
esp3210
arduino10
scanner9
Programming languages (15)
Github contributions (5)
nexcess/magento-turpentine
Aug 2013 - May 2017
A Varnish extension for Magento.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:30 commits, 24 PRs, 40 comments in 3 years 10 months
Contributions summary:Jeroen primarily contributed to the backend functionality of the Varnish extension for Magento, focusing on optimizing caching behavior and improving integration with Varnish. They implemented "lurker-friendly bans" to prevent excessive ban list growth, added a feature to cache ESI blocks, and fixed an issue related to HTTPS ESI URLs. Furthermore, the user improved code related to static file caching and load balancing support.
magento2-modulecachingmagento2varnishmagento
gwillem/magento-malware-scanner
May 2017 - Jul 2018
Scanner, signatures and the largest collection of Magento malware
Role in this project:Security Engineer
Security EngineerContributions:28 commits, 35 PRs, 13 pushes in 1 year 2 months
Contributions summary:Jeroen's contributions primarily focus on improving the project's security posture and detecting malicious code. They added and updated rules for a malware scanner, including those targeting Magento-specific vulnerabilities. The user also whitelisted files and enhanced a deobfuscation script, demonstrating a commitment to identifying and mitigating potential threats within the repository's context. These actions directly contribute to the project's core function of malware detection and analysis.
scannersignaturesmagento2malwaremagento
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