Justin Williams
Principal Engineer - Design Software at Spatial
Denver, Colorado, United States
Summary
👤
Senior🎓
Top SchoolJustin Williams is a Principal Engineer specializing in design software with 12 years of experience building polished, user-focused mobile and desktop applications from startup products to enterprise SDKs. Based in Denver, he’s led iOS teams at TED, Neurotrack, PFF, and now Spatial, delivering major redesigns, cross-platform SDKs, and SwiftUI tooling that helped products scale across platforms and languages. He combines hands-on implementation—shipping custom video players, Live Activities, home-screen widgets, and macOS apps—with API and developer experience design to make integrations easy for partners and internal teams. An active contributor to mobile open-source, he adapted PINRemoteImage for multi-target Apple platforms and added WebP support, reflecting a pragmatic approach to cross-platform compatibility. Early founder experience with Second Gear and award-winning apps demonstrates his product instinct and end-to-end ownership. Colleagues describe him as someone who builds things people want to use and confidently recommend.
11 years of coding experience
10 years of employment as a software developer
Bachelor of Science (BS) Computer and Information Technology, Bachelor of Science (BS) Computer and Information Technology at Purdue University
Stackoverflow
723reputation
56kreached
6answers
19questions
Github Skills (13)
uiimage10
objective-c10
uiimageview10
ios10
image10
cocoa9
tvos8
webp7
xcode6
appstore6
sqlite6
iphone6
swift5
Programming languages (9)
Github contributions (5)
pinterest/PINRemoteImage
Feb 2016 - Nov 2017
A thread safe, performant, feature rich image fetcher
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:9 commits, 5 PRs, 12 comments in 1 year 9 months
Contributions summary:Justin primarily focused on adapting the codebase for different iOS targets (iOS and tvOS) and platform-specific implementations. They introduced conditional compilation using macros to differentiate between iOS and macOS platforms. The user made several adjustments to image handling and UI elements, ensuring compatibility across different iOS versions and device types, including WebP image format support. They modified a number of files to use iOS/tvOS specific frameworks.
objective-cimagegifsfeature-richsdwebimage
justin/Aspen
Dec 2015 - May 2017
Contributions:13 releases, 44 commits, 5 PRs in 1 year 5 months
objective-cloggerlogging-librarylogginglogging-framework
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