Alexandr Stelnykovych
Senior Software Engineer at IVPN
Kyiv, Ukraine
Summary
🤩
Rockstar🎓
Top SchoolAlexandr Stelnykovych is a Senior Software Engineer with 11+ years of hands-on experience building cross-platform systems and tooling, from embedded automotive diagnostics to desktop and daemon applications. He is fluent in Go, C#, C/C++ and JavaScript and has a deep background in low-level protocols (CAN, ISO 15765, SAE J1939), multi-threaded and sockets programming, and GUI stacks across Electron, WPF and Qt. At IVPN he contributes to the open-source multiplatform VPN core and UI, and his GitHub work on Portmaster highlights a focus on stability, Windows kernel interactions and system-level performance fixes. Alexandr combines broad legacy-desktop and embedded expertise with modern cloud/Go tooling, often bridging protocol-heavy engineering with polished user-facing clients. Based in Kyiv, he brings a pragmatic engineering style proven across automotive, security and networking domains, plus a track record of migrating and refactoring databases and native subsystems.
11 years of coding experience
16 years of employment as a software developer
Programming of electronic computers and microprocessor systems, Programming of electronic computers and microprocessor systems at Kiev industrially-economic college of National Aviation UniversityIgor Sikorsky Kyiv Polytechnic Institute
English, Russian, Ukrainian
Github Skills (14)
databases10
firewall10
go10
networking10
database10
golang9
privacy9
go-modules9
automations8
automation8
system-design8
testing7
sqlite7
cicd4
Programming languages (8)
Github contributions (5)
safing/portmaster
Apr 2024 - Mar 2025
🏔 Love Freedom - ❌ Block Mass Surveillance
Role in this project:
Back-end Developer & System Engineer
Back-end Developer & System EngineerContributions:3 releases, 4 reviews, 24 PRs in 11 months
Contributions summary:Alexandr primarily focused on bug fixes and improvements related to the core functionality of the Portmaster application. Their contributions addressed issues in Windows-specific kernel driver interactions, improved sticky domain handling, and optimized the handling of time.Ticker objects to prevent application crashes. The user also made updates to dependencies and refactored code related to database interactions, including the migration to a new SQLite database. The contributions highlight the user's focus on stability, performance, and system-level aspects of the application.
golangprivacy-toolsapplication-firewalldnsprivacy
stenya/winget-pkgs
Aug 2022 - Sep 2024
The Microsoft community Windows Package Manager manifest repository
Contributions:19 pushes, 8 branches in 2 years 1 month
mdtwindows-package-managerwindowsmanifestmicrosoft-community
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