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A profile about the people, projects and experiences behind their work. Discover their career, contributions and connections.

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Company name

2022

Founder

Company name

2022

Founder

Fiona Fung | Cosign

Fiona Fung

Fiona Fung Leads the engineering organization behind Claude Code and Cowork at Anthropic. Previously held engineering leadership roles at Meta and Instagram, working on Facebook Marketplace, smart glasses, and infrastructure. Earlier, built developer tools including Visual Studio and TypeScript at Microsoft.

Career

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Anthropic

Sep 2025 — Present

Member of Technical Staff

Meta

Apr 2024 — Aug 2025

Senior Engineering Director

Instagram

Apr 2022 — Apr 2024

Senior Engineering Director

Meta

Sep 2017 — Apr 2022

Senior Engineering Director

Facebook

Jun 2015 — Sep 2017

Engineering Manager

Microsoft

Sep 2012 — May 2015

Principal Group Engineering Manager

Microsoft

May 2010 — Oct 2012

Principal Engineering Manager

Microsoft

Feb 2008 — Apr 2010

Engineering Manager

Microsoft

Oct 2003 — Feb 2008

Software Design Engineer

IBM

Aug 2001 — Aug 2002

Software Developer (Intern)

Microsoft

Jun 2001 — Aug 2001

Software Design Engineer in Test (Intern)

IBM

Jun 2000 — Aug 2000

Quality Assurance Specialist (Intern)

University of Toronto

Bachelor's studies