Todd Hertzelle is a Principal iOS Engineer and founder with a decade-long career building native Apple-platform experiences and full-stack systems across healthcare, consumer electronics, and enterprise clients. He specializes in Swift/SwiftUI and Cocoa frameworks, having led major migrations (Objective-C to Swift), Bluetooth/IoT integrations, and identity verification work for airport security. Todd blends hands-on mobile UI/UX craftsmanship—evidenced by UI contributions to the open-source reimplementation of The Sims Online—with backend and cloud experience in NodeJS and GCP for scalable services. Based in Lake Saint Louis, Missouri, he mentors engineering teams, establishes mobile engineering practices, and routinely optimizes concurrency and performance for production apps. Outside of work he’s a keen pinball player, a subtle hint at his appreciation for tactile design and playful user experiences.
10 years of coding experience
9 years of employment as a software developer
Associate's degree, Associate's degree at St Charles Community College
Bachelor's degree, Bachelor's degree at University of Missouri-Saint Louis
Contributions:9 commits, 9 PRs, 25 comments in 5 years 5 months
Contributions summary:Todd primarily contributed to the user interface and user experience of the reimplemented Sims Online game. Their work included adding features such as resizing the property chat dialog and adjusting font sizes using keyboard shortcuts. They also improved the login workflow with UI enhancements and fixed bugs related to job information, including issues specific to the Dancer job. Additionally, they implemented UI for inventory actions.
Contributions:10 reviews, 18 PRs, 18 pushes in 4 months
objective-cios-sdkleancloudsdkswift
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