Sergey Tepliakov
Principal Software Engineer at Microsoft
Redmond, Washington, United States
Summary
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Rockstar🎓
Top SchoolSergey Tepliakov is a Principal Software Engineer with over 15 years of hands-on experience building reliable, high-performance distributed systems and currently driving engineering excellence for Azure Core in Redmond. He specializes in C#, C++ and system design, with a track record of fixing elusive performance and reliability issues that yielded 5–10x throughput improvements in cloud build and cache systems. A former Microsoft C# MVP and long-term contributor to notable open-source projects like microsoft/CodeContracts and BuildXL, he brings deep expertise in compiler integration, async state machines, and observable, maintainable infrastructure. Sergey pairs technical leadership with active mentoring and process improvements, enabling teams to scale sustainably while tackling the hardest production problems. An interesting detail: beyond architecture and coding he has a background delivering .NET training and shaping developer productivity through both official and informal coaching.
15 years of coding experience
20 years of employment as a software developer
Master Computer Science, Master Computer Science at Donetsk National Technical University
English
Stackoverflow
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10questions
namespaces
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task-parallel-library
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Github Skills (31)
roslyn10
net10
dotnet10
asp-net10
performance-optimization10
dotnet-core10
error-handling10
csharp10
filesystem9
oop9
enums9
serialization9
multithreading9
file-operations9
build-system9
Programming languages (5)
Github contributions (5)
microsoft/BuildXL
Mar 2019 - Jan 2023
Microsoft Build Accelerator
Role in this project:
Backend Developer
Backend DeveloperContributions:559 commits, 182 PRs, 87 pushes in 3 years 10 months
Contributions summary:Sergey's commits primarily focus on improving the performance and stability of the build system. Their work includes addressing and resolving issues such as exceptions during file operations by adding error handling. They also made multiple changes related to improving the efficiency of memory usage. Additionally, they implemented features that enhance and improve the cache's performance through careful design.
kernelunixcompilermicrosoftexecutable
microsoft/CodeContracts
Jun 2015 - Mar 2017
Source code for the CodeContracts tools for .NET
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 releases, 240 commits, 177 PRs in 1 year 9 months
Contributions summary:Sergey primarily worked on the CodeContracts tools for .NET, focusing on extracting and rewriting code contracts to include runtime checks. They addressed issues related to the Roslyn compiler, particularly regarding async methods and state machine generation. Their contributions included adding support for new compiler versions (VS14RC) and fixing bugs related to expression tree parsing within contracts, ensuring that code contracts are correctly processed during the rewriting phase. Additionally, the user modified and added test cases to ensure correct behavior of the Code Contracts tools with a variety of C# language features.
dotnetcsharp
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