Sergey Kolodiy
Founder at Self-employed
Moscow, Moscow City, Russia
Summary
👤
Senior🎓
Top SchoolSergey Kolodiy is a founder and senior .NET/.NET Core software engineer with over a decade of commercial experience designing secure, high-performance, and scalable systems for clients ranging from startups to enterprises like SogoTrade, TÜV SÜD and Infor. He combines strong architecture and coding skills with a passion for clean, testable, and maintainable code, and has published guidance on writing testable software. Sergey has delivered business-critical features, performance optimizations, and complex integrations across APIs, microservices, trading platforms and SaaS products, and has hands-on experience with CI/CD, identity/security services and real-time data systems. As a remote-first consultant and digital nomad, he founded Orthogonal and built an algorithmic trading solution that integrates with Telegram for remote management. He’s comfortable owning end-to-end delivery—design, implementation, testing and deployment—and often introduces pragmatic middleware and extensions to improve reliability and observability. Not actively looking for new roles, he nonetheless remains available for selective consulting and high-impact engagements.
11 years of coding experience
11 years of employment as a software developer
Bachelor's Degree Information Systems and Technologies, Bachelor's Degree Information Systems and Technologies at Voronezh Institute of High Technologies
Russian, English
Stackoverflow
5,879reputation
1.2mreached
77answers
14questions
entity-framework
top-5%
moq
top-5%
linq
top-5%
owin
top-5%
unit-testing
top-5%
encryption
top-5%
Github Skills (68)
dotnet9
owin9
scada9
edi9
api9
edifact9
x129
odata9
linq9
entity-framework9
asp-net9
encryption9
logger9
unit-testing9
netstandard9
Programming languages (2)
Github contributions (5)
sergey-kolodiy/PolyGen
Jun 2017 - Sep 2019
Contributions:86 commits, 1 PR, 81 pushes in 2 years 3 months
apiuser-interfacecode-generatordatabaserest
sergey-kolodiy/Permission
Feb 2018 - Sep 2019
Contributions:27 commits, 16 pushes, 1 branch in 1 year 7 months
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