John Ngoi
Software Engineer
San Francisco, California, United States
Summary
👤
SeniorJohn Ngoi is a seasoned software engineering leader and entrepreneur known for delivering scalable platforms and high-impact products. As Senior Software Engineering Manager at Twin Health, he steers mobile engineering (iOS/Swift, Android/Kotlin, Flutter/Dart) and IoT integrations, champions trunk-based development, release trains, and a left-shift, design-driven culture. He built the Maps+ platform at Pacific Gas and Electric, a highly adopted, award-winning product that boosted operational safety and efficiency, earned the Margaret Mooney Award, and secured a provisional patent. His career spans leadership and hands-on roles at Macy's, Capital One, UCWeb, Revel Systems, and more, where he rebooted apps, set architectural standards, and shaped hiring and engineering culture. A founder and advisor, he started Decimal Software, mentors startups through The Hacker Exchange, and is the author of the best-selling technical book Interviewing in Swift: Algorithms and Data Structures. Based in San Francisco, he holds a Stanford CS/ML degree and a BS in Computer Engineering from Iowa State, blending deep software engineering, product sense, and scalable cloud architecture.
11 years of coding experience
Github Skills (26)
shadow8
uiview8
perfect7
swift-47
swift-57
rotation7
hud7
back-end7
leancloud6
reimplementation6
swift-framework6
shake6
server-side5
swift5
api5
Programming languages (1)
Github contributions (5)
johnnst/Swift-Algorithms-And-Data-Structures
Aug 2016 - Sep 2021
This repo is to support my book.
Contributions:25 commits, 2 PRs, 30 pushes in 5 years 1 month
johnnst/John-Ngoi-Swift-Guide
Jan 2015 - Jun 2015
Contributions:5 pushes in 5 months
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