Cal Stephens
Senior Software Engineer, IOS at Airbnb
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolCal Stephens is a Senior iOS engineer with 12 years of experience building production mobile experiences and developer tooling, currently at Airbnb in San Francisco. He blends product-focused app development with deep open-source contributions—most notably to airbnb/lottie-ios and the Swift compiler and tooling—improving animation performance, formatter rules, and closure semantics. Cal has a track record of shipping features across consumer apps and developer tools, from prototyping data visualizations at Apple to automating style and lint workflows at Airbnb. A hackathon enthusiast and long-time contributor to high-profile Swift projects, he pairs pragmatic engineering with a curiosity for language-level edge cases and test-driven improvements.
12 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at Georgia Institute of TechnologyHigh School, Brodcasting and Film, High School, Brodcasting and Film at Davidson Fine Arts Magnet School
English, Spanish
Stackoverflow
743reputation
163kreached
22answers
7questions
loops
top-5%
Github Skills (38)
closure10
lottie10
test-automation10
programming-language10
ios10
parser10
swiftlint10
animation10
testing10
swiftui-app10
ui-design10
uid10
automation10
front-end-development10
parsing10
Programming languages (13)
Github contributions (5)
airbnb/lottie-ios
Dec 2021 - Jan 2023
An iOS library to natively render After Effects vector animations
Role in this project:
Mobile Developer (iOS) & UI/UX Developer
Mobile Developer (iOS) & UI/UX DeveloperContributions:24 releases, 797 reviews, 174 commits in 1 year 1 month
Contributions summary:Cal primarily contributed to the iOS application by implementing new features within the example application and expanding testing capabilities for the Lottie library. This included support for a browsing interface showcasing various sample animations, and the implementation of demo controls showcasing advanced features. They also added and improved the snapshot tests, and improved overall performance.
renderios-transitionios-libraryanimationafter-effects
airbnb/swift
Aug 2019 - Nov 2022
Airbnb's Swift Style Guide
Role in this project:DevOps Engineer / Automation Engineer
DevOps Engineer / Automation EngineerContributions:8 releases, 344 reviews, 73 commits in 3 years 3 months
Contributions summary:Cal primarily contributed to the configuration and automation of the Airbnb Swift style guide project. Their commits focused on integrating and updating SwiftFormat and SwiftLint, including upgrading versions, enabling new rules, and refining configuration options within the `airbnb.swiftformat` file. They also implemented features like the Swift Package Manager command plugin, along with various improvements, such as supporting the `--exclude` flag and Xcode 14 compatibility.
swiftformatstyle-guideairbnbstyleguideswiftpm
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.