Justin Hatin
Staff Software Engineer, IOS at Block
Charlottesville, Virginia, United States
Summary
🤩
Rockstar🎓
Top SchoolJustin Hatin is a Senior iOS Software Engineer with a decade of experience building scalable native apps for iOS, tvOS, and Android that run on millions of devices. He’s delivered major features for Square Point of Sale and led Modes and Remote Mode Selection efforts, improving shipping cadence through heavy adoption of AI agent workflows like Claude Code and Amp. Equally comfortable in Swift, Kotlin, Objective‑C, and several backend and web technologies, he’s owned SDKs, instrumentation, and rollout strategies to ensure performance and stability at scale. Based in Charlottesville, VA, Justin combines hands‑on implementation with strong organizational skills and a knack for applying emerging AI tooling to streamline developer workflows. An ex-game‑development student, he brings a product-minded approach to mobile UX, platform design, and cross-platform collaboration.
10 years of coding experience
8 years of employment as a software developer
Bachelor’s Degree Game Development/Design, Bachelor’s Degree Game Development/Design at Rochester Institute of Technology
Github Skills (20)
kotlin10
kotlin-android10
protocol-buffers9
java9
square9
android9
combine9
protobuf9
grpc9
swift8
swiftui8
pie-chart8
tvos7
uikit7
declarative-ui6
Programming languages (4)
Github contributions (5)
jhatin94/Election-Sim-Calc
Jul 2016 - Sep 2019
Contributions:64 pushes, 1 branch in 3 years 2 months
jhatin94/Personal-Website
Jul 2016 - Nov 2021
Personal Website for Resumes or anything I'd like to host
Contributions:40 PRs, 59 pushes, 3 branches in 5 years 5 months
javascripti-dhostresumes
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