Willy Liu
Senior Software Engineer at Meta
Stony Stratford, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolWilly Liu is a Senior Software Engineer with 10 years of experience, currently leading web engineering for Messenger’s end-to-end encrypted backups at Meta and driving adoption for millions of users. He blends full-stack web development with an AI-first, agentic workflow approach, owning projects end-to-end from code to data-driven growth tracking and experiments. Previously he helped build Reality Labs’ design system and improved accessibility across Meta’s core component libraries, partnering with central a11y and web core teams and authoring company-wide playbooks and office hours. Willy is an active TypeScript contributor—enhancing DefinitelyTyped definitions for real-world API clients—which reflects his attention to developer experience and tooling. He holds an MSc in Computer Science from KTH and brings a pragmatic focus on scalability, usability, and measurable impact. Less obvious: he combines deep accessibility expertise with hands-on experimentation leadership, making inclusive design a growth lever rather than a checkbox.
10 years of coding experience
5 years of employment as a software developer
Teknik: Informations- och medieteknik, Teknik: Informations- och medieteknik at Gymnasium VästerhöjdMaster of Science - MS, Computer Science, Master of Science - MS, Computer Science at KTH Royal Institute of Technology
Swedish, English, Chinese
Stackoverflow
11reputation
666reached
0answers
1question
Github Skills (10)
typescript10
typescript-definitions10
typescripts10
api10
type-definition10
apidoc10
typescript-types10
javascript8
azure6
azure-active-directory6
Programming languages (7)
Github contributions (5)
DefinitelyTyped/DefinitelyTyped
Jan 2019 - Jan 2019
The repository for high quality TypeScript type definitions.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:11 commits, 1 comment in 1 day
Contributions summary:Willy primarily contributed to enhancing the type definitions for the snoowrap library, which appears to be a wrapper for the Reddit API. They added missing options and properties across multiple files, including those for core objects like `Submission`, `Comment`, `RedditUser`, and `Subreddit`. Additionally, they addressed linting issues and fixed type inconsistencies in the test files and method signatures. This work primarily focused on TypeScript and API interaction.
typescript-definitionstype-definitionshigh-qualitydtsdefinitions
willwull/circle-slider
Aug 2017 - Mar 2018
A slider, except it's round
Contributions:108 commits, 19 PRs, 48 pushes in 7 months
roundslider
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