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 on the App Store, and served as project manager and lead developer for the guided workout feature of a mobile fitness app.


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 currently seeking mobile engineering internships 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