Introducing Chablon: A Simple Training Caller for Footwork Practice
Introducing Chablon, a simple caller app for focused footwork and movement training.
Engineering polished products across Apple platforms and the web.
I am Johnny Peterson, a staff software engineer focused on fast, thoughtful interfaces, pragmatic architecture, and the craft it takes to ship software people trust.
01SwiftUI, UIKit, MapKit
Native apps with crisp interaction, accessibility, and performance.
02Full-stack product engineering
End-to-end delivery across frontend, backend, infrastructure, and pipelines.
03Technical leadership
Clear reviews, maintainable roadmaps, and calm delivery habits.
Recent writing
Notes from shipping, learning, and moving between native and web work.
From Swift Publish to Next.js
Why I moved this site from Swift Publish to Next.js, and how that opens up more room for frontend work beyond iOS.
init()
How I became an iOS engineer and what I value when building apps.
Find My Ultra
A SwiftUI + MapKit companion that helps ultrarunners discover races.