Alex S
Windows Software Developer at Protectimus Ltd
Ukraine
Summary
👤
SeniorAlex S is a Windows software developer with nine years of hands-on experience building low-level components in C, C++ and assembly across kernel and user modes. He specializes in Windows internals—implementing credential providers, authentication packages, security tokens, services, file systems, and both legacy and CNG crypto—while also working with IPC, RPC, COM, shell extensions and asynchronous event-driven designs. Currently at Protectimus Ltd, he focuses on robust Windows 2FA logon solutions that span boot-execution apps to registry and certificate-based authentication. Alex combines production-grade engineering with reverse engineering and deep debugging skills, enabling him to solve complex platform security and interoperability challenges. Based in Ukraine, he brings practical expertise in designing secure client↔server communications and extensible authentication flows. Colleagues rely on him for rare cross-cutting knowledge that bridges low-level OS mechanics with deployable security features.
9 years of coding experience
Stackoverflow
32,237reputation
1.0mreached
907answers
5questions
uwp
top-5%
asynchronous
top-5%
debugging
top-5%
multithreading
top-5%
dll
top-1%
winapi
top-1%
Github Skills (24)
dll10
windows10
winapi10
assembly9
asynchronous9
debugging9
x869
multithreading9
uwp9
socket9
ntdll7
kernel6
driver6
mfc6
ntfs6
Programming languages (3)
Github contributions (5)
rbmm/GetPdb
Aug 2021 - Jan 2023
Contributions:16 commits, 16 pushes, 1 branch in 1 year 4 months
rbmm/cmd
Jan 2019 - Jan 2025
Contributions:7 pushes, 1 branch in 6 years
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