Jason Imison
Senior Software Engineer at Microsoft
London, England, United Kingdom
Summary
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RockstarJason Imison is a Senior Software Engineer with 15 years of experience building developer tools and language platforms, currently working on Power BI's Mashup Language at Microsoft. A generalist and creator of OmniSharp, he has deep expertise in compiler and language-server work, notably contributing to the F# compiler, FsAutoComplete, and Mono to improve debugging, portable PDBs, and code-completion performance. His background spans Visual Studio for Mac, Codespaces, and Xamarin, where he focused on making F# a first-class citizen across tooling and mobile scenarios. Jason combines back-end build engineering and full-stack plugin work—ranging from runtime patches in mono to UI and testing improvements in editor plugins—so he understands both low-level runtime issues and developer UX. He is based in London and brings a practical, systems-oriented approach to improving developer productivity across the .NET ecosystem.
15 years of coding experience
8 years of employment as a software developer
Github Skills (41)
debugging10
vsix10
debug10
roslyn10
msbuild10
compiler-development10
net10
dotnet10
language-server-protocol10
netframework10
vim10
asp-net10
compiler-compiler10
mono10
visual-studio10
Programming languages (18)
Github contributions (5)
OmniSharp/omnisharp-vim
Jan 2013 - Oct 2015
Vim omnicompletion (intellisense) and more for C#
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:515 commits, 16 PRs, 20 pushes in 2 years 8 months
Contributions summary:Jason contributed to the C# Vim plugin by changing the test folder structure, fixing and adding new tests, and fixing references. Their work involved modifying existing code, indicating bug fixes, code improvements and refactoring. The user's commits also demonstrate a focus on ensuring the quality and correctness of the project through testing.
vim-pluginsvimomnisharpcsharpintellisense
OmniSharp/omnisharp-roslyn
Dec 2014 - Nov 2015
OmniSharp server (HTTP, STDIO) based on Roslyn workspaces
Role in this project:Back-end Developer
Back-end DeveloperContributions:27 releases, 255 commits, 135 PRs in 10 months
Contributions summary:Jason contributed to the OmniSharp server by implementing a "goto definition" endpoint and the corresponding response model. They also removed unnecessary code and refactored existing methods to enhance code quality. Furthermore, the user added a "find usages" feature and other core features to support the C# development experience within the server.
roslyndotnetmonoomnisharpstdio
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