Craig Motlin
Vice President at Two Sigma
Fort Lee, New Jersey, United States
Summary
🤩
Rockstar🎓
Top SchoolCraig Motlin is a seasoned engineering leader with 15 years of experience, currently serving as Vice President and Engineering Manager of the SDLC Merge Team at Two Sigma. He brings deep back-end expertise from a long tenure at Goldman Sachs and notable open-source contributions to high-profile Java projects like Netty and Eclipse Collections, where he focused on performance optimizations and code quality. Craig combines a Wharton finance background with a computer science foundation, enabling him to bridge technical and business perspectives on complex systems. Known for improving maintainability—through refactoring, CheckStyle enforcement, and documentation fixes—he quietly elevates developer experience and reliability across large codebases.
15 years of coding experience
12 years of employment as a software developer
Finance, General, Finance, General at University of Pennsylvania - The Wharton SchoolComputer Science, Computer Science at University of Pennsylvania
Stackoverflow
26,632reputation
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137answers
53questions
conventions
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java
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oop
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arraylist
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Github Skills (42)
unit-testing10
algorithms10
javadoc10
data-structure10
java10
refactor10
javas10
performance-optimization10
collections10
data-structures10
refactoring10
documentation10
code-formatting10
constructor9
oop9
Programming languages (10)
Github contributions (5)
goldmansachs/gs-collections
Jan 2012 - Nov 2015
GS Collections has been migrated to the Eclipse Foundation, re-branded as Eclipse Collections. https://www.eclipse.org/collections/
Role in this project:
Back-end Developer
Back-end DeveloperContributions:302 commits, 1 PR, 3 pushes in 3 years 11 months
Contributions summary:Craig contributed to the core data structures and algorithms of the GS Collections library. They implemented core methods related to sets, bags, and maps, optimized the implementation of existing classes, improved iteration patterns, and fixed bugs related to their implementation. The user’s work focused on performance optimization of the existing code.
eclipse-collectionsbrandedfoundationeclipsejava
eclipse-collections/eclipse-collections
Dec 2015 - Jan 2023
Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1 release, 240 reviews, 397 commits in 7 years 2 months
Contributions summary:Craig's primary contribution appears to be related to code style and formatting. The commits focus on standardizing and applying consistent copyright headers across multiple Java source files within the "eclipse-collections" project. Further commits involve fixing CheckStyle configurations and related violations, and more recently, turning on additional CheckStyle checks for invalid whitespace.
eclipse-collectionsapijava-collectionsprimitive-collectionscollections-framework
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