Julia Liuson, president of Microsoft's developer division (DevDiv), will resign at the end of June, though she will continue in an advisory role.

Liuson is part of Microsoft's CoreAI division, introduced by CEO Satya Nadella in January 2025 and headed by EVP Jay Parikh, former head of engineering at Meta, who joined the company in October 2024. Liuson also assumed responsibility for GitHub when its CEO Thomas Dohmke stepped down in August 2025, at which time GitHub became part of CoreAI.

According to The Verge, Liuson said in an internal memo: "I've been thinking about this for a while, and in January I shared with Satya and Jay that the timing feels right for me to take this step."

The Register has asked Microsoft to comment.

Liuson started at Microsoft after graduating in 1992, according to a company bio. She is credited with "leading the effort to make the .NET platform open source and cross-platform," though her role in this is tarnished by a 2021 incident when a .NET tooling feature, Hot Reload, was removed to become exclusive to Visual Studio. This was reportedly under instruction from Liuson, though the feature was reinstated after developer outcry.

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Despite that U-turn, Microsoft later shifted Visual Studio Code (VS Code) .NET tooling from the open source OmniSharp to the closed source, licensed C# Dev Kit, causing Mono creator Miguel de Icaza, formerly at Microsoft, to say that "the .NET platform is becoming closed, to ensure it is only useful if you are a customer."

The significance of such things is small, though, compared to the impact of AI on Microsoft's developer strategy. When Microsoft formed CoreAI in January 2025, Nadella said the new division would build an AI-first app stack.

"Azure must become the infrastructure for AI, while we build our AI platform and developer tools – spanning Azure AI Foundry, GitHub, and VS Code – on top of it," Nadella said, adding that "building custom applications will be driven by software (i.e. 'service as software')."

Developers will be watching to see what direction DevDiv takes following Liuson's departure. Changes are likely, potentially including less emphasis on tools such as Visual Studio and VS Code, and more on agentic development.

Echoing Nadella, Microsoft technical fellow Anders Hejlsberg, inventor of both C# and TypeScript, said earlier this year that AI makes traditional IDEs less important, that "you're supervising what it's doing, and it doesn't necessarily need an IDE in the same way." ®

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