Andrei Belov
Principal Software Engineer at F5
Lafayette, Colorado, United States
Summary
🤩
Rockstar🎓
Top SchoolAndrei Belov is a Principal Software Engineer with 14 years of experience building and operating high-scale web and SaaS infrastructure, currently contributing to F5's NGINX-based offerings from Lafayette, Colorado. He began his career in core web server development and played multifaceted roles at NGINX from early startup days through acquisition, shipping features in the nginx core and Unit and shaping release and DevOps practices for Amplify and Controller. Deeply experienced in backend and security engineering, Andrei has fixed memory leaks, hardened file/symlink handling, and improved ModSecurity and GeoIP2 integrations—contributions visible in prominent open-source repos like nginx and ModSecurity. He combines hands-on systems programming with release engineering and SRE collaboration, and brings an uncommon mix of low-level C expertise and pragmatic product-focused operational skills informed by years of running distributed monitoring services.
14 years of coding experience
15 years of employment as a software developer
Information Technology, Information Technology at Moscow State University of Economics, Statistics and Informatics (MESI)
Stackoverflow
1,201reputation
67kreached
9answers
1question
networking
top-5%
nginx
top-5%
Github Skills (58)
web-application-firewall10
filesystem10
c-language10
reverse-proxy10
system-programming10
waf10
package-development10
plugin-development10
it-security10
http10
software-distribution10
software-update10
c1110
file-operations10
cicd10
Programming languages (17)
Github contributions (5)
owasp-modsecurity/ModSecurity-nginx
Nov 2016 - Dec 2021
ModSecurity v3 Nginx Connector
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:69 commits, 26 PRs, 17 pushes in 5 years 2 months
Contributions summary:Andrei primarily contributed to the back-end logic of the ModSecurity Nginx connector, modifying the code to improve logging, error handling, and overall performance. Their work included decreasing log levels for expected actions, extending PCRE malloc/free wrappers to use nginx pools, and fixing a memory leak in intervention processing. The user also addressed a compilation issue related to specific nginx versions and introduced directives for transaction IDs, indicating a focus on stability and security enhancements.
nginxconnectormodsecurity-nginxwafmodsecurity
nginx/nginx
Jan 2017 - Jan 2025
The official NGINX Open Source repository.
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 reviews, 1 PR, 14 comments in 8 years 1 month
Contributions summary:Andrei primarily contributed to the core functionality of the Nginx web server. Their work included implementing features related to file handling, specifically incorporating `openat()` and `fstatat()` functions to enhance symlink handling and improve security. They also modified core functions and added a new core variable for response status, demonstrating a focus on optimizing server behavior. Additionally, they updated modules to leverage the new functionality and incorporated the `$status` variable.
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