Matt Rothenberg
Principal Systems Engineer at Matt Rothenberg
New York, New York, United States
Summary
🤩
Rockstar🎓
Top School
Top expert iniOS Swift Development
Matt Rothenberg is a Principal Systems Engineer with 16 years of experience blending product design, front-end engineering, and backend systems work from freelance startups to Cloudflare. He has led product-focused engineering at GitHub Next and Replicate, co-created and shipped developer tools like Copilot CLI, and contributed to widely used open-source Swift and iOS projects including Alamofire and AFNetworking. Comfortable across the stack, Matt’s work spans UX-driven React apps and low-level Swift/Ruby tooling, with notable contributions to package management, networking, and media libraries. He brings a designer’s eye to engineering problems—running a longstanding freelance design/dev practice while shipping research-forward prototypes at scale. Known for refactoring for maintainability and pragmatic API improvements, he often surfaces subtle UX and reliability wins that aren’t obvious from product screenshots alone. Based in New York, he pairs curiosity about developer ergonomics with hands-on coding across languages and platforms.
17 years of coding experience
14 years of employment as a software developer
Political Science, Political Science at ICPBachelor of Arts Government French, Bachelor of Arts Government French at Skidmore College
English, French
Stackoverflow
86reputation
16kreached
2answers
2questions
Github Skills (122)
dependency-management10
postgresql10
mobile-development10
package-management10
python10
dependency-analysis10
image-processing10
testing10
command-line-interface10
http10
accelerator10
coretext10
ruby10
storekit10
data-transformation10
Programming languages (26)
Github contributions (5)
Jounce/Surge
Aug 2014 - Jan 2021
A Swift library that uses the Accelerate framework to provide high-performance functions for matrix math, digital signal processing, and image manipulation.
Role in this project:
Backend Developer
Backend DeveloperContributions:5 reviews, 60 commits, 20 PRs in 6 years 5 months
Contributions summary:Matt primarily focused on enhancing the Surge Swift library, specifically by adding and improving mathematical functionalities. Their contributions include the addition of Fast Fourier Transform (FFT) capabilities and the implementation of matrix operations, which are central to the library's purpose. They also addressed performance considerations by adjusting benchmark tests. Furthermore, the user contributed to the test suite, ensuring the reliability of mathematical functions.
accelerate-frameworkdigital-signal-processingimage-manipulationswiftaccelerate
mattt/TransformerKit
Nov 2012 - Mar 2020
A block-based API for NSValueTransformer, with a growing collection of useful examples.
Role in this project:Back-end Developer
Back-end DeveloperContributions:111 commits, 6 PRs, 19 pushes in 7 years 5 months
Contributions summary:Matt primarily contributed to the development of string, image, and date transformers, adding new functionalities like reversing strings, removing diacritics, and transliterating strings to Latin characters. They also introduced image transformation capabilities for PNG and JPEG representations. Furthermore, the user updated and refactored existing code, changing the namespace, adding date transformers and addressing compiler warnings.
nsvaluetransformerobjective-cswiftdata-transformation
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