Mattias Geniar
CTO at Mechel Trading
Lier, Antwerp, Belgium
Summary
👤
Senior🎓
Top SchoolMattias Geniar is a pragmatic problem solver and founder with 15 years of hands-on experience in Linux systems, PHP back-end development, and DevOps. Based in Lier, Belgium, he combines consultancy work at Robot Studios with building SaaS products at Immutable, regularly shipping practical automation and hosting solutions. His open-source contributions show deep operational knowledge—improving Varnish caching templates, extending SSL certificate validation (SNI, CA chains, wildcard handling), and hardening web crawlers and security tooling. Comfortable moving between support management, systems engineering and PHP hacking, he has a knack for turning forensic insights from breached servers into tools that improve detection and resilience. Quietly entrepreneurial, he blends client-facing support experience with low-level infrastructure fixes that keep services reliable at scale.
16 years of coding experience
13 years of employment as a software developer
Toegepaste Informatica, Toegepaste Informatica at Karel de Grote-HogeschoolSint-Jozef Instituut Kontich
English, Dutch
Stackoverflow
31reputation
0reached
0answers
0questions
Github Skills (26)
caching10
ssl10
tls1210
cert10
validations10
apidoc10
web-application-security10
testing10
validation10
tls1310
guzzle10
php10
certificate10
api10
varnish10
Programming languages (21)
Github contributions (5)
mattiasgeniar/php-exploit-scripts
Jun 2014 - Apr 2022
A collection of PHP exploit scripts, found when investigating hacked servers. These are stored for educational purposes and to test fuzzers and vulnerability scanners. Feel free to contribute.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:57 commits, 17 PRs, 36 pushes in 7 years 10 months
Contributions summary:Mattias contributed a Joomla exploit script, demonstrating an understanding of PHP and web application security vulnerabilities. The code changes involve obfuscated PHP code, indicating an interest in analyzing and potentially exploiting PHP-based systems. The user's contributions focus on the identification and analysis of malicious code within a Joomla environment.
exploitphpvulnerability-scanners
mattiasgeniar/varnish-4.0-configuration-templates
Apr 2014 - Oct 2019
Configuration templates used for Varnish 4.0 implementations.
Role in this project:DevOps Engineer
DevOps EngineerContributions:45 commits, 16 PRs, 30 pushes in 5 years 7 months
Contributions summary:Mattias primarily contributed to refining and improving the Varnish configuration templates. Their work involved fixing syntax errors, implementing bug fixes for the 4.0.1 release, and enhancing the overall functionality of the VCL configuration files. They focused on cookie manipulation, removing various cookies, and also handled aspects of caching static content and handling redirects. The contributions showcase an understanding of Varnish's configuration options and best practices.
varnish
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