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Hi, I’m Joon Jang, a Senior iOS Engineer with nearly a decade of experience delivering high-performance mobile apps for both consumer and enterprise markets. I’ve led initiatives in Web3-enabled platforms (digital collectibles) and have a strong background in automotive software, consistently ensuring reliability and strong user experiences across complex, high-traffic products. I focus on native iOS development with Swift, SwiftUI, and Objective-C, applying MVVM/MVC architectures. I’m passionate about building scalable architectures, optimizing performance, and collaborating across product, design, and QA to ship features that users love while maintaining a crash-free track record.…Hi, I’m Joon Jang, a Senior iOS Engineer with nearly a decade of experience delivering high-performance mobile apps for both consumer and enterprise markets. I’ve led initiatives in Web3-enabled platforms (digital collectibles) and have a strong background in automotive software, consistently ensuring reliability and strong user experiences across complex, high-traffic products. I focus on native iOS development with Swift, SwiftUI, and Objective-C, applying MVVM/MVC architectures. I’m passionate about building scalable architectures, optimizing performance, and collaborating across product, design, and QA to ship features that users love while maintaining a crash-free track record.

Joon Jang

App Developer, Web Developer, Front-End Developer, +2

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Hi, I’m Joon Jang, a Senior iOS Engineer with nearly a decade of experience delivering high-performance mobile apps for both consumer and enterprise markets. I’ve led initiatives in Web3-enabled platforms (digital collectibles) and have a strong background in automotive software, consistently ensuring reliability and strong user experiences across complex, high-traffic products. I focus on native iOS development with Swift, SwiftUI, and Objective-C, applying MVVM/MVC architectures. I’m passionate about building scalable architectures, optimizing performance, and collaborating across product, design, and QA to ship features that users love while maintaining a crash-free track record.…Hi, I’m Joon Jang, a Senior iOS Engineer with nearly a decade of experience delivering high-performance mobile apps for both consumer and enterprise markets. I’ve led initiatives in Web3-enabled platforms (digital collectibles) and have a strong background in automotive software, consistently ensuring reliability and strong user experiences across complex, high-traffic products. I focus on native iOS development with Swift, SwiftUI, and Objective-C, applying MVVM/MVC architectures. I’m passionate about building scalable architectures, optimizing performance, and collaborating across product, design, and QA to ship features that users love while maintaining a crash-free track record.

Available to hire

Hi, I’m Joon Jang, a Senior iOS Engineer with nearly a decade of experience delivering high-performance mobile apps for both consumer and enterprise markets. I’ve led initiatives in Web3-enabled platforms (digital collectibles) and have a strong background in automotive software, consistently ensuring reliability and strong user experiences across complex, high-traffic products.

I focus on native iOS development with Swift, SwiftUI, and Objective-C, applying MVVM/MVC architectures. I’m passionate about building scalable architectures, optimizing performance, and collaborating across product, design, and QA to ship features that users love while maintaining a crash-free track record.

Skills

Experience Level

Expert

Expert

Expert

Expert

Work Experience

Senior iOS Mobile Engineer at Dapper Labs

August 1, 2023 - January 1, 2026

Led major engineering initiatives for the NFL ALL DAY iOS app, driving feature development and ensuring performance and stability for a high-traffic consumer product. Directed the one-year maintenance cycle for the Disney Pinnacle iOS app, including collaboration with Disney+ to launch the Disney Perks Promo event, resulting in over 300% growth in new user acquisition. Designed and implemented complex In-App Purchase (iAP) processing flows for digital collectibles on iOS. Leveraged Kotlin Multiplatform to architect shared network calls and data models for cross-platform consistency. Contributed to performance optimization and troubleshooting for NBA Top Shot iOS, achieving a 99% crash-free rate.

Senior iOS Developer at ClearMarket

February 1, 2016 - May 1, 2023

Architected and maintained three mission-critical automotive mobile applications (AuctionLane, InspexCR, Logistix) that streamline auction and inspection workflows. Built AuctionLane for iOS to enable dealers to search, manage, and find inventory; pioneered InspexCR for iOS and integrated with complex auction management systems. Implemented MVC/MVVM architectures to handle complex data and UI interactions, boosting developer efficiency and code clarity. Engineered offline data synchronization for text, images, audio, and video, and implemented camera features with AVFoundation and video stabilization to improve inspection accuracy. Achieved 99% crash-free performance across the suite.

iOS Developer at FamSee Inc

May 1, 2015 - January 31, 2016

Led UI/UX architecture for a complex photo application on iPad, delivering an interactive interface that significantly boosted user engagement. Implemented user-friendly features to improve overall app functionality and usability within a nine-month development window.

Senior iOS Developer at ClearMarket (Automotive)

February 1, 2016 - May 1, 2023

Architected and maintained three mission-critical automotive mobile applications (AuctionLane, InspexCR, and Logistix); developed AuctionLane for iOS to streamline dealer inventory workflows; created InspexCR for iOS to optimize inspections and integrate with auction management systems; implemented MVC/MVVM architectures, offline data synchronization, and advanced camera features with AVFoundation to enhance inspection accuracy; achieved 99% crash-free performance across the app suite.