Walter Fettich

Delivered a prototype and scaled it to a production system deployed in over 16 locations: a computer-vision system that tests people's football skills. • Rapidly iterated and fine-tuned a CoreML model for ball and pose detection. • Built a functional system across iPad, iPhone, backend and TV. • Developed a stereo vision algorithm using 2 iPhones to accurately position the ball in 3D space. • Technologies: CoreML, Vision, MediaPipe, SwiftUI, Multipeer Connectivity.

• Developed the InkHunter app (AR + AI for tattoo previews). • Reused existing Objective-C code for AR overlay; built new SwiftUI architecture. • Delivered version 2.0 with redesigned UI. • Technologies: Objective-C, Swift, SwiftUI, ARKit, Metal, CoreImage, Vision, MVVM-C

• Contributed to Vision Bank’s fintech app for Saudi Arabia. • Collaborated with cross-functional teams on features like payments and onboarding. • Identified and resolved critical bugs, including a security design flaw. • Technologies: Swift, SwiftUI, Combine, The Composable Architecture, MVVM-C

• Worked on Onfido’s iOS SDK used for identity verification. • Developed new features like residency verification • Technologies: Swift, UIKit, Unit Testing, Bitrise CI

• Built ~60-screen e-commerce app using SwiftUI & Combine. • Collaborated with design, backend, and QA teams. • Technologies: Swift, SwiftUI, Combine, UIKit, MVVM-C

• Developed the wikoti app for restaurant discovery. • Improved the UI based on continuous user/tester feedback • Technologies: Swift, UIKit, Autolayout

• Built various apps for clients using iOS, Android, and React Native. • Adapted quickly to multiple tech stacks and specs. • Technologies: Objective-C, React Native, Redux, Android, Java

Many other projects done before 2017 using Objective-C, .net, C#, C++, Java