Oleksandr Deundiak
Senior Staff Software Engineer at Zscaler
Ottawa, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolOleksandr Deundiak is a Senior Staff Software Engineer with 11 years of experience specializing in Rust, secure protocol design, networking, and cryptography, currently based in Ottawa and working at Zscaler. He has driven open-source secure tunneling, peer-to-peer connectivity, and Zero Trust identity work at Ockam, contributing to credentials flows, secure channels, and eBPF integrations for hardened data paths. Previously he led a team building open-source cryptographic SDKs at Virgil Security, shipping low-level crypto primitives up to user-facing services, and earlier cut his teeth on high-performance C++ and iOS code. Equally comfortable in Rust, Python, Swift, C and C++, he combines deep systems knowledge—TCP/UDP, NAT traversal, MPTCP, Linux internals—with pragmatic engineering leadership. His GitHub history shows attention to detail in low-level text rendering and memory/glyph fixes as well as meaningful contributions to the Ockam project, reflecting a blend of security-first thinking and production-grade implementation.
11 years of coding experience
6 years of employment as a software developer
Igor Sikorsky Kyiv Polytechnic Institute
Ukrainian, English
Github Skills (13)
access-control10
objective-c10
textbox10
rust10
layout10
coretext10
cryptography10
ebpf9
memory-management9
low-level8
net8
network8
networking8
Programming languages (17)
Github contributions (5)
build-trust/ockam
Jun 2020 - Jan 2023
Orchestrate end-to-end encryption, cryptographic identities, mutual authentication, and authorization policies between distributed applications – at massive scale.
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:1754 reviews, 757 commits, 874 PRs in 2 years 7 months
Contributions summary:Oleksandr's commits primarily involve implementing and updating features within the `ockam` project, specifically focusing on the credentials flow, secure channel, and data structures. They've made changes to enhance security measures through the addition of credential access controls and integration of eBPF, enhancing the protection of sensitive data. The contributions show an understanding of cryptography and security best practices.
policyenforcemente2eeidentitycredentials
Cocoanetics/DTCoreText
Jul 2015 - Aug 2015
Methods to allow using HTML code with CoreText
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits, 1 PR in 1 month
Contributions summary:Oleksandr focused on improving the text rendering capabilities of the `dtcoretext` repository. Their contributions primarily involved modifying and enhancing the CoreText implementation for improved line truncation and text layout. The commits also involved refactoring and creating utility functions to enhance the overall code quality and maintainability of the project. Further contributions addressed and corrected bugs related to memory management and glyph handling within the text rendering process.
coretext
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.