Mat Stankiewicz
Principal Software Engineering Manager at Microsoft
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolMat Stankiewicz is a Principal Software Engineering Manager at Microsoft with nine years of experience leading large-scale web client infrastructure for Microsoft Teams, where he drove the New Teams client that significantly improved speed and reliability for millions. He blends deep technical expertise in TypeScript, C#, and distributed web systems with strategic architectural leadership, influencing features like Teams Free and early Copilot investments. A hands-on manager and mentor, he focuses on empowering teams to ship high-performance, resilient systems while improving developer experiences for third-party integrations. Mat also contributes to open-source tooling for Teams (notably refinements to the BotBuilder-MicrosoftTeams library), reflecting a commitment to production-grade interoperability. Based in San Francisco, he pairs a Drexel CS background with a track record across Amazon, WideOrbit, and Microsoft, bringing both executional rigor and a penchant for incremental platform improvements that scale.
8 years of coding experience
12 years of employment as a software developer
Master's Degree Computer Science, Master's Degree Computer Science at Drexel University
French, English, Polish
Github Skills (12)
bot-framework10
microsoft-teams10
csharp10
dotnet-core10
unit-testing9
asp-net9
net9
dotnet9
typescript-types6
typescripts6
typescript6
nodejs5
Programming languages (8)
Github contributions (5)
OfficeDev/BotBuilder-MicrosoftTeams
Jul 2018 - Sep 2018
Microsoft Bot Builder extension library for developing bots for Microsoft Teams
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 4 PRs, 5 pushes in 2 months
Contributions summary:Mat focused on enhancing the Microsoft Teams Bot Builder extension library. Their primary contributions involve refining the TeamsChannelAccount model and associated parsing logic. Specifically, the user addressed how AAD object IDs are handled, updating the `TeamsChannelAccount.cs` file and adding unit tests to ensure proper parsing from various message sources. They also updated a TypeScript definition file.
microsoft-teamsdevelopingbotbuilderbots
OfficeDev/Orky
Aug 2017 - Apr 2019
You can use Orky to register your own local bot in Microsoft Teams and execute scripts from ANYWHERE!
Contributions:1 release, 48 commits, 12 PRs in 1 year 8 months
microsoft-teamsbotanywhereoffice365bots
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