Logan Johnson
Technical Lead, Mobile at Square
New York, New York, United States
Summary
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Rockstar🎓
Top SchoolLogan Johnson is a seasoned mobile engineering leader with 18 years of experience, currently serving as Technical Lead, Mobile at Square in New York. He has progressed through engineering and leadership roles at Square since 2012, driving products like Square for Restaurants, Register, and Point of Sale while balancing hands-on execution with team and architecture stewardship. Logan brings deep expertise in mobile navigation and state management—evidenced by meaningful open-source contributions to Square’s popular flow library, where he improved async transitions, view-state persistence, and core navigation APIs. His background spans platform and embedded systems work as well, from smart-TV/mobile integration to computer-vision projects for industrial scanners, revealing a comfort with both low-level systems and user-facing apps. Known for refactoring legacy APIs and enabling re-entrant asynchronous behavior, he combines pragmatic engineering with long-term maintainability. He holds a B.S. in Computer Science from Georgia Tech and prefers solving hard UX-to-system problems at scale.
18 years of coding experience
22 years of employment as a software developer
B.Sci. Computer Science, B.Sci. Computer Science at Georgia Institute of Technology
Stackoverflow
215reputation
8kreached
0answers
4questions
Github Skills (12)
javas10
state-management10
android10
java10
testing9
functional-programming6
model-view-controller6
monads6
concurrency6
haskell6
preference6
future6
Programming languages (6)
Github contributions (5)
square/flow
Sep 2013 - Jul 2017
Name UI states, navigate between them, remember where you've been.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:156 commits, 98 PRs, 162 pushes in 3 years 10 months
Contributions summary:Logan primarily worked on the `flow` library, focusing on the core navigation and state management features. They implemented enhancements to the `resetTo` and `replaceTo` methods, improving their functionality and behavior. Furthermore, they refactored the library to support asynchronous transitions, with re-entrant calls. They also improved the view state persistence and cleaned up deprecated APIs, and also created a basic sample app demonstrating use of their work.
navigate
loganj/atunit
Oct 2007 - Mar 2011
Contributions:28 commits in 3 years 4 months
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