Justin Jiang

iOS Engineer Intern at MyFitnessPal

Built the redesigned Progress Hub, a new primary bottom tab bar for health metrics tracking using Swift, SwiftUI, MVVM; collaborated with PMs, QA, and designers in Figma; boosted DAU engagement by 15%.

iOS Engineer Intern at U-Haul

Modernized mobile POS architecture by migrating the Settings module (12+ views) from UIKit to SwiftUI with security features like biometric authentication (Face ID / Touch ID) and automated session timeout; leveraged MVVM + Clean architecture to reduce legacy code by 35% and cut view render latency by 5%.

Programming Instructor at The Coder School

Led customized project-based curricula (Java, Python, PixelPAD, Scratch) in 1:1 and group classes for 20+ students aged 6–16.

iOS Engineer Intern at MyFitnessPal

Built the redesigned Progress Hub, a new primary bottom tab for health metrics tracking using Swift, SwiftUI, and MVVM; collaborated with PMs, QA, and designers in Figma, boosting DAU engagement by 15%.

iOS Engineer Intern at U-Haul

Modernized mobile POS architecture by migrating the Settings module (12+ views) from UIKit to SwiftUI with security features like biometric authentication (Face ID/Touch ID) and automated session timeout, leveraging MVVM + Component architecture to reduce legacy code by 35% and cut view render latency by 5%.

Programming Instructor at The Coder School

Led customized project-based curricula (Java, Python, PiskelPAD, Scratch) in 1:1 and group classes for 20+ students aged 6–16.

iOS Engineer Intern at MyFitnessPal

Built the redesigned Progress Hub, a new primary bottom tab for health metrics tracking using Swift, SwiftUI, and MVVM. Collaborated with PMs, QA, and designers in Figma to align roadmap and UI with product goals, boosting DAU engagement by 15%. Implemented dynamic animations, navigation transitions, advanced scrolling, embedded hyperlinks, and deep links to improve user experience and engagement.

iOS Engineer Intern at UnibUI

Led an iOS app release using Swift, SwiftUI, MVVM, and Figma. Implemented sign-up, login, and password recovery flows with Firebase, enhanced the UI with animated launch screens, and redesigned profile views, boosting app retention by 25%.