Jang Seoksoon's Homepage

Shopkick is a leading shopping rewards app that awards users points (“kicks”) for store visits, barcode scans, and purchases. It serves millions of users across the U.S. and beyond.

Projects:

Legacy Code Modernization:
- Modernized a legacy 10+ year Objective-C codebase by rewriting it in Swift and integrating SwiftUI for enhanced scalability.
- Optimized CI/CD pipelines, unit testing, and release management to ensure seamless deployments.

iOS Application Enhancements
- Designed and maintained high-performance codebases using Swift and Objective-C.
- Implemented user interfaces with SwiftUI and leveraged modern concurrency (async/await, actor).
- Translated requirements and designs into production-ready code.

Links:

iOS: App Store
Android: Google Play
Wikipedia: Link
YouTube commercial: Link1, Link2

HLVM

Founder (November 2022 – Present)

HLVM: High Level Virtual Machine

We're building HLVM, an AI-powered native desktop app that redefines how you interact with your computer. It begins with a streamlined search bar—like macOS Spotlight—that instantly finds files, launches apps, and runs commands. HLVM goes further by integrating local LLMs such as Llama and Deepseek, enabling natural language interactions to execute tasks—think of it as a smarter, more capable macOS Siri. For power users, HLVM includes an embedded JavaScript runtime and an abstraction layer so you can write, run, and share automation scripts at scale. In short, HLVM combines spotlight search, generative AI, and programming runtime into one platform to supercharge developer productivity.

Also, HQL, inspired by Swift and Clojure, is a general-purpose scripting language built into HLVM I am writing. While HLVM can work entirely with natural language, for power users seeking to harness programming capabilities to maximize productivity, HQL is there as a first-class citizen language alongside natural language and JavaScript for advanced abstraction and automation in HLVM. HQL leverages LISP properties to the fullest. One notable example is its REPL-driven development via nREPL for live code evaluation, enabling real-time programmatic control of HLVM—including direct control of local LLMs. This is where programming meets AI.

Projects:

In progress

Contract Software Engineer

Seoul, South Korea - Hybrid

Software Engineer (Contract) (June 2016 – Present)

July 2016 – December 2020

Projects

Provided contract software engineering services for clients ranging from early-stage startups to major tech companies.
Platforms: iOS, macOS, Android, React Native, Web, Firebase, Serverless
Worked as a contractor for companies ranging from early-stage startups to major Korean companies such as LG CNS, KT, and more through Wishket, Upwork, and more.
Wishket Profile, Users' rating

KOINO

Seoul, South Korea - On-site

Full-time iOS Software Engineer, R&D Department 2 (April 2014 – June 2016)

Responsible for the development, testing, distribution, and maintenance of iOS/macOS applications. Built and maintained internal static libraries, SDKs, and numerous user-facing applications based on SIP and VNC, while also supporting Android development.

Projects:

107 Telecommunication Relay Service (Hearing-impaired) (iOS/Android, September 2015 – January 2016)
- Concurrently developed applications for both iOS and Android.
- Links: Android , iOS
- Press coverage: YTN, KTV #1, KTV #2
KEB Hanabank: Non-Face-to-Face Bank Account SDK (iOS) (October 2015 – April 2016)
- App Store
- Received media coverage via ZDNet
Seoul City: Angel Eyes Project (iOS, October 2015 – April 2016)
- For end users: App Store , For service providers: App Store
- Press coverage: KBS, TBS #1, TBS #2, KTV
LG CNS IVCT Video Call (iOS, April 2014 – June 2016)
- Developed multiple versions for general users and service providers: LG CNS IVCT, VIDEO CALL, For Provider, IVCT For Provider
Link me mine (iOS/macOS, January 2016 – June 2016)
- Released via the official homepage: Official homepage
- iOS App Store
110 Government Civil Service Call Center (iOS, March 2015 – August 2015)
- App Store
- Featured in MBC
National Human Rights Commission of Korea (iOS, April 2014 – June 2014)
- App Store
Anysupport (iOS/macOS, April 2014 – February 2016)
- Developed a remote support solution for screen sharing across desktop and mobile platforms. Preview
- iOS version
- macOS version

BPNR

Intern, Solution R&D Department (January 2013 – March 2013)

Served as a Java back-end engineering intern, contributing to the development of an internal forum using Java, Spring, and Oracle RDBMS on the JVM platform.