Expertise
- .NET, C#, Roslyn, MSBuild, Visual Studio, editors, WPF, MEF
- Developer productivity, build observability, engineering systems
- Author and maintainer of widely used open source developer tools
Kirill Osenkov
Principal Software Engineer at Microsoft · .NET developer tools since 2004
- github.com/KirillOsenkov
- Bluesky
- Bellevue, WA, USA
- US Citizen
Microsoft · 2007–present
2024–2026
Azure Data Fabric Engineering Systems
DevOps, developer productivity, security, modernization
- Migrated a 1200-project build to modern MSBuild — incrementality and robustness
- Binlogs everywhere for build observability
- Wrote and integrated BinaryCompatChecker to catch binary compatibility issues at build time
- Wrote and integrated Beetle to investigate test failures across 100,000 machines
- Maintained il-repack, MSBuild binlog viewer and other open source
- An ocean of small improvements across the board, coaching and knowledge sharing
2023
Power BI — Reporting and Exploration
- Numerous build fixes and improvements
- Improvements to the MSBuild binlog viewer and BinaryCompatChecker
- Rewrote most T4 templates using Roslyn source generators
2007–2022
Developer Division
SDET, SDE → Principal SDE. Mission: making .NET developers worldwide more productive.
2017–2022
Visual Studio for Mac — Core/Editor
- Integrated the VS editor, Roslyn and web tools (HTML, CSS, JS/TS), shared between VS and VS for Mac
- Quality, reliability and performance
2017
MSBuild
- Invented and shipped MSBuild binary logging and the MSBuild Structured Log Viewer
- Used by tens of thousands of developers worldwide to diagnose MSBuild issues
2015–2016
CodeFlow
- Maintained and improved Microsoft's internal code review app for 25,000 users company-wide
2007–2014
Managed Languages (C#, VB, F# IDE)
- Shipped and open-sourced Roslyn — the new C#/VB compiler and IDE services
- Set up test infrastructure, ensured Roslyn quality, found ~2000 bugs
- Ensured Roslyn is not dependent on VS and can be hosted anywhere; built EditorTestApp, a lightweight managed IDE hosting Roslyn services outside VS
- Patent: a testing DSL for calling APIs
- Created a novel Roslyn-based online source browsing experience: source.dot.net, referencesource.microsoft.com, sourceroslyn.io
2005–2006
Microsoft Internships
- Two summer internships as SDET in VS Team Architect (DSL Tools)
Education
2003–2007
M.Sc. in Computer Science
Brandenburgische Technische Universität Cottbus, Germany