Sander Saares
Principal Software Engineer at Microsoft
Estonia
Summary
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RockstarSander Saares is a Principal Software Engineer with 13 years of experience building high-scale, secure media and web services from Estonia, currently focused on advancing Rust as a first-class platform for global-scale cloud services at Microsoft. He has driven architecture and implementation for the media delivery network behind Teams, Skype and Azure Communication Services, delivering solutions that support tens of thousands of concurrent participants while meeting stringent regulatory and privacy requirements. Sander pairs deep systems and backend expertise (C#, Rust, .NET) with pragmatic performance optimization—sometimes re-implementing C# paths in Rust to close performance gaps and reduce costs. He has led distributed teams across time zones, introduced Scrum-derived processes, mentored engineers, and participated actively in hiring to build diverse, resilient organizations. An active open-source contributor, he’s improved production-grade .NET libraries for Prometheus metrics and JWT handling, notably adding robust byte-array payload support and label-removal for collectors—practical enhancements that reflect his attention to compatibility and operational needs.
13 years of coding experience
8 years of employment as a software developer
English, Estonian
Stackoverflow
25,985reputation
3.9mreached
149answers
28questions
model-view-controller
top-5%
type-conversion
top-1%
combobox
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datetime
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svn
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uwp
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Github Skills (35)
datetime10
net10
web-token10
dotnet10
asp-net10
casting10
prometheus10
encoding10
jsonwebtoken10
dotnet-core10
jwt10
data-handling10
type-conversion10
binary-data10
performance-monitoring10
Programming languages (17)
Github contributions (5)
prometheus-net/prometheus-net
Feb 2017 - Jan 2023
.NET library to instrument your code with Prometheus metrics
Role in this project:
Back-end Developer
Back-end DeveloperContributions:29 releases, 6 reviews, 487 commits in 6 years
Contributions summary:Sander focused on improving the core functionality of the .NET Prometheus library. Their contributions included fixing a culture-related bug in the `ThreadSafeDouble.ToString()` method and downgrading a tester dependency to align with other project dependencies. They also added the `Collector.RemoveLabelled()` method, providing functionality to remove labelled child collectors when data with certain labels is no longer needed. Additionally, the user made restructuring changes to the project assemblies and upgraded dependencies for maintainability.
net-libraryinstrumentationhttpclientfactoryhealthchecksgrpc
dvsekhvalnov/jose-jwt
Jun 2016 - Jun 2016
Ultimate Javascript Object Signing and Encryption (JOSE), JSON Web Token (JWT) and Json Web Keys (JWK) Implementation for .NET and .NET Core
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 commits, 1 PR, 17 comments in 10 days
Contributions summary:Sander primarily contributed to the implementation of byte array payload support within the JWT library. This involved creating new APIs with a "Bytes" suffix for encoding and decoding binary data, while maintaining backward compatibility with existing APIs. They also added new methods for decoding byte array payloads and implemented corresponding tests. These changes enhanced the library's functionality for handling binary data within JWT tokens.
signingsignatureweb-tokenjwkjson-web-token
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