Patrick Leonard
Washington, District of Columbia, United States
Summary
🤩
Rockstar🎓
Top SchoolPatrick Leonard is a product-minded software engineer with 11 years of experience building and supporting mobile SDKs and developer tools, currently contributing at Anthropic and Mapbox. He architects and implements features for Mapbox's Maps SDK for iOS, mentors engineers, and has led mobile support teams that enable mission-critical client integrations. An active open-source contributor, he added geometry operations, GeoJSON import, and visualization UI to the notable GEOSwift geometry engine and improved examples, localization, and performance in the widely used mapbox-maps-ios SDK. His background blends front-end data visualization, epidemiological data analysis, and developer-focused support, giving him a rare mix of product, customer empathy, and technical depth. Based in Washington, D.C., he brings practical experience across iOS, Swift, JavaScript, and data tooling to bridge developer needs and shipping reliable mapping features. A small but telling detail: his GitHub summary simply says "Maps!"—a succinct hint at the focus that ties together his work and open-source contributions.
11 years of coding experience
6 years of employment as a software developer
Master of Arts - MA, International Relations and Affairs, Honors, Master of Arts - MA, International Relations and Affairs, Honors at University of Chicago - Committee on International RelationsA.B, Social Studies, A.B, Social Studies at Harvard UniversityDiploma, General Studies, Advanced Placement, Diploma, General Studies, Advanced Placement at Whitman-Hanson Regional High School
English, Spanish, French, Swahili
Stackoverflow
414reputation
31kreached
18answers
0questions
Github Skills (17)
map-box10
ios10
mapbox-gl10
ui-design10
uid10
front-end-development10
maps10
swift10
geojson9
metal9
geo8
geospatial8
html6
toggle6
json6
Programming languages (9)
Github contributions (5)
mapbox/mapbox-maps-ios
Feb 2021 - Jan 2023
Interactive, thoroughly customizable maps for iOS powered by vector tiles and Metal
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:3 releases, 96 reviews, 30 commits in 1 year 11 months
Contributions summary:Patrick primarily contributed to the iOS Mapbox Maps SDK, focusing on implementing and improving example applications. Their work included adding new examples showcasing features like tracking mode and live data, along with refining existing ones like the custom 2D puck. They also addressed bugs and performance issues within the examples, specifically resolving a retain cycle and integrating new features such as the ability to cluster point annotations. The user also localized labels, updated documentation and added tests.
metalmapboxcustomizablemapios
GEOSwift/GEOSwift
Jul 2022 - Jan 2023
The Swift Geometry Engine.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:14 commits, 4 PRs, 23 pushes in 6 months
Contributions summary:Patrick contributed significantly to the development of a Swift geometry engine by adding core functionality and UI elements. Their work includes implementing geometry operations, adding example applications, and building out views to visualize different geometric shapes. The user also refactored and refined the UI, integrating new features and error messages. They enabled the importing of GeoJSON data and improved the handling of imported geometries.
geospatialgeocartographyswiftgeometry
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