Apple-platform developer, open-source maintainer & Swift contributor
C++ Interoperability Workgroup member
Envision WWDC founder & MacDigest lead
Swift Student Challenge winner
Website GitHub Swift Forums X Medium Email
I’m Jiaxu Li, a student developer building apps for Apple platforms and contributing to the tools and language behind them.
My work spans Swift language evolution, C++ interoperability, developer tooling, SwiftUI, Metal, and spatial computing. I maintain open-source projects, ship apps, and share what I learn through communities, writing, and developer events.
I’m a member of the Swift C++ Interoperability Workgroup, which works on bidirectional interoperability between Swift and C++. I joined in October 2025.
About the workgroup Swift Forums group
I authored SE-0554: Deployment Target Conditional Compilation, proposing #if deploymentTargetAtLeast(...) to conditionally compile code based on a module’s minimum deployment target.
Read the proposal Review discussion
Explore my pull requests across the Swift organization →
First-launch experiences for SwiftUI apps, made with Liquid Glass and Metal.
Add an introduction with one modifier. Compose eight kinds of pages, from a greeting written in glass to interactive graphics and custom SwiftUI content. Built for iOS and macOS, with accessibility support, no package dependencies, and no network requests.
Understand an Xcode upgrade before changing your project.
A terminal app that compares an Apple-platform project across two local Xcode installations. It examines SDK declarations, source context, and compiler diagnostics, then plans and validates source repairs before you apply them.
Built with Swift and SwiftSyntax. Reports findings alongside analysis coverage, with optional on-device assistance from Apple Foundation Models.
Charts reflect public GitHub data. Language proportions describe repository contents, not proficiency.
I build across iPhone, iPad, Mac, and Apple Vision Pro, with a particular interest in spatial experiences and accessible interaction.
| App | Focus |
|---|---|
| OpenReality | Creating and exploring interactive experiences across Apple platforms. |
| DarkSight | Exploring surroundings through LiDAR, depth, and distance. |
| PodcastIntelligent | Turning an idea into a podcast, from script and cover to listening. |
| MemoryCard | Collectible photo and video cards, spatial memories, and tactile accessibility. |
| GardenLab | Growing, experimenting, and learning in a garden on Apple Vision Pro. |
GardenLab was available on the App Store on Apple Vision Pro launch day.
Explore the apps, screenshots, and design stories →
| Year | Recognition |
|---|---|
| 2026 | Swift Student Challenge winner — the playground that became PodcastIntelligent. |
| 2026 | MAIC First Prize — Middle School Group, Qihang Track, with a developer tool. |
| 2025 | First place, Swift Middle School Challenge · Challenge Group — MemoryCard. |
| 2024 | Swift Student Challenge winner — MyHeart, a mood-journaling playground. |
Certifications: Apple Teacher · App Development with Swift, Certified User.
WWDC & speaking
- WWDC26 at Apple Park — Invited as a Swift Student Challenge winner.
- WWDC25 at Apple Park — Invited as a developer.
- Students, Swift, St★rs — Presented PodcastIntelligent in Cupertino during WWDC26 week.
- Swift Contributor Social — Attended during WWDC26 week.
- MAIC finals showcase — Presented MemoryCard in 2025.
- Sharing and Practice from WWDC — Shared experiences with students preparing for the Swift Student Challenge.
Apple acknowledged my assistance in its security release notes for:
- iOS 17 and iPadOS 17 — Notifications.
- iOS 16.4 and iPadOS 16.4 — Status Bar.
These acknowledgements appear under Additional recognition.
For security issues in my projects, please follow the repository’s security policy or contact me privately.
Founder and host of Envision WWDC, a free, independent online event during WWDC week, focused on visionOS, spatial computing, and Swift.
The event appeared on Apple’s community event pages for WWDC25 and WWDC26. Its first edition brought together about a hundred participants.
Head of MacDigest, covering Apple, Mac software, AI, and developer tools through news, explainers, and guides.
Author of Swift Starter Guide, an English-language introduction to Swift 6 for complete beginners, published on Apple Books in January 2026.
I’m also an Apple Services Performance Partner.
Where it started
I published my first app, a simple water tracker, when I was 10. About a dozen early apps followed.
Those apps have since been retired, but each one taught me something I still use—in the interfaces I design, the problems I investigate, and the projects I maintain.
Open to conversations about Swift, developer tools, spatial computing,
open-source collaboration, and developer communities.
Get in touch More about my work
Think Different.