Chris Czub
Staff Cybersecurity Engineer at Seesaw Learning
Detroit, Michigan, United States
Summary
👤
Senior🎓
Top SchoolChris Czub is a Staff Cybersecurity Engineer with 15 years of combined software and security engineering experience, currently building scalable security programs at General Motors and Seesaw Learning. He brings an engineer-first approach to security, creating tooling, CI integrations, and secure defaults that enable teams to move fast while staying protected. As the first security hire at multiple companies—including Duo Security, Doppler, and Penumbra Labs—he has designed incident response plans, run SOC 2 audits and bug bounty programs, and mentored growing security teams. He’s a hands-on Rust and backend developer who contributed to notable open-source projects like mitmproxy and the privacy-focused Penumbra blockchain, demonstrating deep expertise in network interception and decentralized systems. Comfortable at the intersection of product and infrastructure, he focuses on practical, automatable controls, threat-aware developer workflows, and developer empathy.
15 years of coding experience
19 years of employment as a software developer
B. Sc., Computer Science, B. Sc., Computer Science at Oakland University
python, perl, php, objective c, html, javascript
Stackoverflow
3,295reputation
377kreached
20answers
49questions
Github Skills (31)
debugging10
debug10
tls1210
python10
back-end-development10
http10
proxy10
tls1310
security10
mtls10
mitmproxy10
blockchain10
libtls10
rust10
protobuffer10
Programming languages (22)
Github contributions (5)
penumbra-zone/penumbra
Nov 2021 - Jan 2023
Penumbra is a fully private proof-of-stake network and decentralized exchange for the Cosmos ecosystem.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 228 reviews, 347 commits in 1 year 2 months
Contributions summary:Chris primarily contributed to the back-end of the Penumbra project, making changes related to error handling, implementing core features and addressing performance issues with several commit. Their contributions also include improvements to CLI functionality and the implementation of a dex component with associated data structures. The user demonstrates strong skills in Rust, Protobuf, and the core logic of a decentralized exchange.
exchangeprivacyethereumproof-of-stakedecentralized-exchange
mitmproxy/mitmproxy
Sep 2015 - Nov 2015
An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
Role in this project:Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:10 commits, 7 PRs, 9 comments in 2 months
Contributions summary:Chris primarily contributed to the mitmproxy project by modifying and extending its core functionality. Their work included refactoring existing code, implementing new features like custom content view support, and addressing bugs related to error handling. A significant portion of the commits involved enhancing security aspects, particularly concerning network traffic interception and platform-specific configurations. The user also demonstrated proficiency in adding and testing new content view plugins, improving the project's flexibility.
http-headerpythonsslproxyja3
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