Sergey Nizovtsev
Kernel Developer at CloudLinux
Bar, Montenegro
Summary
👤
Senior🎓
Top SchoolSergey Nizovtsev is a seasoned kernel and systems developer with 16 years of experience in C and C++ focused on low-level programming, performance optimization, and maintainable build systems. He has delivered production-grade networking and security work across companies like Tempesta Technologies, Kaspersky Lab, Yandex and CloudLinux, including kernel XDP datapath integration with Hyperscan and contributions to high-performance CDN and DDoS protection software. Sergey combines hands-on kernel patching and TLS/hardening work with build-system and tooling expertise (OpenWrt, Bazel, Envoy plugins), and has a track record of fixing subtle stability and security bugs in open-source projects. Based in Montenegro, he balances deep systems craftsmanship with freelance and research experience in SDN and distributed systems. Note: he is bound by an active non-compete in trading/HFT through 2027.
16 years of coding experience
9 years of employment as a software developer
Lomonosov Moscow State University
Русский, Английский
Stackoverflow
79reputation
4kreached
3answers
1question
Github Skills (25)
tls1210
http10
c1110
tls1310
security10
c1710
mtls10
libtls10
web-security10
performance-monitor9
performance-analytics9
performance-measurement9
performance-monitoring9
performance-analysis9
error-handling9
Programming languages (11)
Github contributions (5)
tempesta-tech/tempesta
Sep 2021 - Sep 2021
All-in-one solution for high performance web content delivery and advanced protection against DDoS and web attacks
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:11 reviews, 44 commits, 3 PRs in 13 days
Contributions summary:Sergey primarily focused on improving the security and stability of the Tempesta web content delivery solution. Their contributions included fixing formatting issues in IPv4/port handling, enhancing the TLS layer with improved error messages, and optimizing code for performance. They also addressed potential vulnerabilities by removing orphan error codes and strengthening TLS-related functionalities, thereby enhancing the robustness of the system against various attacks.
content-deliverylinux-kernelhttp-acceleratortlsweb-application-firewall
tmux/tmux-fuzzing-corpus
Oct 2020 - Oct 2020
Contributions:3 commits in 1 day
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