Marco Rossignoli
Principal Software Enginner at Microsoft
Prague, Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolMarco Rossignoli is a Principal Software Engineer with two decades of experience building high-availability distributed systems, from low-latency fintech CEP engines to modern agentic LLM tooling for millions of developers. Based in Prague, he combines deep .NET expertise—contributing to core projects like dotnet/runtime and co-maintaining Coverlet—with practical systems knowledge in Azure, microservices, and secure telemetry. At Microsoft he designs and implements agentic systems and LLM evaluation infrastructure for GitHub Copilot, bringing rigorous testing and prototype-driven innovation to production-scale AI. Marco’s background in OS internals, WinDbg, and multicore programming gives him an unusual ability to optimize both runtime and developer-facing tooling, and he’s known for turning rapid prototypes into reliable, auditable systems.
9 years of coding experience
22 years of employment as a software developer
Electronic, Electronic at Istituto Statale Superiore Carlo Anti Villafranca di Verona
Italian, English
Stackoverflow
1reputation
0reached
0answers
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Github Skills (20)
unit-testing10
mstest10
testing10
net10
test-runner10
dotnet-new10
dotnet10
teste10
asp-net10
dotnet-core10
async-await10
code-coverage10
netcore10
csharp10
ui-testing10
Programming languages (9)
Github contributions (5)
coverlet-coverage/coverlet
Jun 2018 - Oct 2022
Cross platform code coverage for .NET
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 releases, 135 reviews, 290 commits in 4 years 5 months
Contributions summary:Marco primarily contributed to code coverage functionality within the .NET project. Their commits focused on modifying the code to handle different file extensions (.exe), and address feedback on pull requests. They introduced changes to improve branch coverage and reduce false positives. The user was also involved in refactoring the async/await state machine handling and added support for source-generated files.
instrumentationdotnetbytecodeunittestcoverlet
microsoft/vstest
Nov 2019 - Jan 2023
Visual Studio Test Platform is the runner and engine that powers test explorer and vstest.console.
Role in this project:Test Automation Engineer / QA Engineer
Test Automation Engineer / QA EngineerContributions:3 releases, 422 reviews, 92 commits in 3 years 2 months
Contributions summary:Marco primarily contributed to the test platform, focusing on test automation and quality assurance. They addressed issues related to the Coverlet in-process collector and SocketCommunicationManager, indicating a focus on improving test execution and communication. Several commits included fixing tests, implementing new tests, and addressing test failures suggesting a dedication to enhancing the reliability and stability of the test platform.
visual-studiodotnetconsoletest-platformtesting
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