Justin Willemsen
Software
Developer

About

Hi! I'm Justin.


A computer science student with experience designing and building iOS apps using SwiftUI. I launched QuitClock, a bad-habit–tracking app currently available on the App Store, and I recently built the guided workout feature for an iOS fitness app as part of a collaborative course project. I’m currently developing an Army Fitness Test application intended for public release.


I spent over 13 years in the Army, where managing systems, personnel, and resources helped me develop a strong combination of technical, organizational, and leadership skills. I graduate in December 2026 and am actively seeking an iOS or mobile engineering internship for Summer 2026.

Projects

QuitClock app screenshot

QuitClock

iOS app that helps users track progress since quitting a bad habit

Language: Swift

Frameworks: SwiftUI, SwiftData, StoreKit

Fitness app screenshot

Mobile Fitness

iOS app focused on ease of use for individuals new to fitness

Language: Swift

Frameworks: SwiftUI, SwiftData, Combine, AudioToolbox

* Group project. I was project manager and developed the guided-workout feature.

Splits app screenshot

Splits: Running Calculator

Web application to quickly determine pace, time, or distance in real time

Language: Python

Framework: Reflex

Contact

[email protected]
in/jstnwll
jstnwll
@jstnwll.com