James Paolantonio
Software Engineer at Apple
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolJames Paolantonio is a seasoned mobile-focused software engineer and technical leader with 11 years of experience building and managing iOS and Android products for startups and public companies. Currently at Apple, he previously served as a Staff Software Engineer at Lyft and led mobile teams as Senior Engineering Manager at Betterment and Director of Mobile Engineering at Slice, where he drove a Swift-based MVVM-FRP rewrite and CI, testing, and architecture improvements. He combines hands-on compiler work—contributing to Swift’s compile-time constant extraction—with product-minded leadership that aligns design, engineering, and operations to ship stable, user-focused apps. A Penn State alum based in New York, he’s known for mentoring engineers, pushing language boundaries in Swift and Kotlin, and translating messy legacy apps into testable, maintainable systems.
12 years of coding experience
9 years of employment as a software developer
BS, Information Sciences & Technology, Minor Engineering Entrepreneurship, BS, Information Sciences & Technology, Minor Engineering Entrepreneurship at Penn State University
Stackoverflow
2,194reputation
94kreached
66answers
11questions
ios
top-5%
Github Skills (22)
abstract-syntax-tree10
compiler-development10
swift10
ios9
code-optimization9
typed-array7
annotations7
multidimensional-arrays7
json7
tuple7
enums7
dynamic-array7
arrayobject7
tuples7
annotate7
Programming languages (5)
Github contributions (5)
swiftlang/swift
Nov 2022 - Jan 2023
The Swift Programming Language
Role in this project:
Back-end Developer
Back-end DeveloperContributions:37 reviews, 13 commits, 33 PRs in 2 months
Contributions summary:James's commits primarily focus on enhancing the Swift compiler's compile-time constant extraction capabilities. They've added support for extracting values from computed properties, initialization calls, tuples, arrays, and enums, as well as handling property wrappers and static function calls. The contributions include changes to the ConstExtract and ConstTypeInfo components, indicating a focus on improving the compiler's ability to optimize code by identifying and utilizing compile-time constants. Moreover, the user also implemented features for extracting source locations and annotations.
programming-languageswift
jPaolantonio/JPAttributedString
Mar 2015 - Oct 2017
A DSL for creating, changing, and using NSAttributedStrings
Contributions:9 commits, 15 PRs, 46 pushes in 2 years 7 months
dsl
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