Billy Castelli
Senior Software Engineer at Apple
Cupertino, California, United States
Summary
👤
Senior🎓
Top SchoolBilly Castelli is a Senior Software Engineer with nine years of experience building full-stack web applications, currently on Apple’s engineering team in Cupertino. He brings deep hands-on experience with Python and TypeScript and a track record of shipping services using React, Node, Flask, Docker, Kubernetes, and AWS (CDK, Lambda, S3, DynamoDB). Billy has moved from intern roles into senior individual contributor work, contributing to internal APIs, CI/CD pipelines, and automation frameworks that improve developer productivity and deployment reliability. His background includes flight-simulation verification and tooling at General Atomics, reflecting strong testing and automation instincts alongside product delivery. Known for bridging frontend and backend concerns, he excels at turning complex requirements into maintainable, production-ready systems. Based in the heart of Silicon Valley with a CS degree from UC Irvine (cum laude), he combines enterprise-scale engineering experience with a pragmatic focus on developer ergonomics.
9 years of coding experience
5 years of employment as a software developer
Carlsbad High SchoolUniversity of California, Irvine
Github Skills (35)
apple-silicon10
macbook-pro10
menu10
rosetta10
react-forms10
architecture9
brightness9
react-hooks9
form-validation9
swiftui9
arm9
react8
password-manager7
python7
flask7
Programming languages (7)
Github contributions (5)
billycastelli/Movie-Watchlist
Sep 2018 - Jul 2021
Flask based web application to create film watchlists. Supports user accounts and saves user data using MySQL.
Contributions:44 commits, 11 PRs, 33 pushes in 2 years 11 months
flaskmysqlmoviespython
pmmc-map/PMMC-Back-End
Oct 2019 - Jul 2021
INF 117: Flask backend for Pacific Marine Mammal Center app
Contributions:41 PRs, 144 pushes, 18 branches in 1 year 9 months
app-centercenterpythonflask-apiflask
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