---
title: Jonathan Gan — React Native & Mobile Engineer
description: Mobile engineer shipping production iOS, Android, and watchOS products with on-device AI, native camera integrations, Swift, Kotlin, and Expo.
canonical_url: https://jongan.com/
md_url: https://jongan.com/index.md
last_updated: 2026-08-23
---

# Jonathan Gan — React Native & Mobile Engineer

Jonathan Gan is a Miami Beach–based mobile engineer with 7+ years in software and 5+ years shipping production React Native systems across iOS, Android, and watchOS. He builds apps around on-device AI, camera and hardware integrations, and offline-first architectures for fintech, healthcare, and consumer products.

Jonathan owns delivery end to end: architecture, React Native and Expo implementation, native Swift and Kotlin modules, backend delivery, CI/CD, App Store release engineering, and post-launch iteration.

## When to work with Jonathan

Reach out when a product needs one accountable engineer to move a mobile app from concept or unstable prototype to a tested release. Best-fit work includes:

- React Native or Expo product development for iOS and Android.
- Native Swift, Kotlin, watchOS, HealthKit, BLE, PTP, or camera integrations.
- On-device AI, local inference, privacy-first data flows, or offline-first architecture.
- App Store signing, TestFlight, release readiness, CI/CD, and production stabilization.
- Technical audits or focused rescue work for mobile products with native or hardware constraints.

When contacting Jonathan, include the target platforms, current product stage, most important user flow, hardware or native requirements, desired release window, and any existing repository or build evidence.

## Experience

### Freelance Software Engineer — July 2024 to present

Independently owns architecture, native integrations, backend delivery, signing, deployment, monitoring, and post-release iteration across Expo and React Native products, including App Store and hardware-integrated releases shipped as sole contributor.

### Senior Analyst III / Delivery Cloud Engineer, Kin + Carta — 2022 to 2024

Shipped React and enterprise solutions for Syngenta Digital, including responsive interfaces, Java code audits, regulated delivery support, cloud deployment automation, and practical LLM pilots for internal operations.

### React / React Native Developer, ChainBytes LLC — 2021 to 2022

Built mobile and web features for a Bitcoin ATM platform, including real-time transaction-state interfaces and wallet functionality.

Earlier work includes Accusoft, BlockSpaces, and mentoring more than 30 students at theCoderSchool. Jonathan earned a B.S. in Information Science from the University of South Florida.

## Selected work

### [Expo Sony Camera](https://github.com/jongan69/expo-sony-camera)

An MIT-licensed Expo native module for Sony camera live view and remote capture over PTP. Jonathan is the sole author and maintainer of the Kotlin and Swift bridge. The experimental 0.x package is published on [npm](https://www.npmjs.com/package/expo-sony-camera).

### [ReelAgree](https://reelagree.com)

A live movie-night planning web app with blind group voting and server-authoritative consensus, built from an Expo codebase targeting web, iOS, and Android.

### [PrepAI](https://prepaihq.com)

A private iPhone health intelligence app with on-device AI, clinical knowledge logic, HealthKit ingestion, local health-record storage, and offline core tracking. Jonathan is the founder and lead mobile architect; the iPhone release is in progress.

### [ListingOS](https://listingos.expo.app/)

A public camera-first AI seller demo that turns product photos into review-ready eBay listing drafts with comparable-backed pricing. Jonathan is the sole developer of the Expo application and Cloudflare backend.

### [PushUp Timer Pro](https://apps.apple.com/us/app/pushup-timer-pro/id1664672788)

A published watchOS workout timer with one-handed interactions and HealthKit integration, built and released by Jonathan.

### [YouTubeResearchAI](https://jongan.com/YouTubeResearchAI/) and [OpenDating Mobile](https://jongan.com/opendating-mobile/)

YouTubeResearchAI turns video URLs into citation-oriented research reports. OpenDating Mobile is a privacy-first decentralized dating application on Nostr with end-to-end encrypted messaging.

## Technical focus

- Mobile: React Native, Expo, Expo Router, TypeScript, Swift, Kotlin, watchOS.
- Native and hardware: HealthKit, BLE, PTP camera control, UVC.
- AI: on-device inference, ExecuTorch, LLM integrations, GPT and Claude APIs.
- Backend and delivery: Node.js, Cloudflare Workers, PostgreSQL, Firebase, Supabase, EAS, App Store Connect, GitHub Actions, and Docker.

## Contact

- [Email Jonathan](mailto:jongan.engineering@outlook.com)
- [GitHub](https://github.com/jongan69)
- [LinkedIn](https://linkedin.com/in/jongan69)
- [Résumé](https://jongan.com/Jonathan-Gan-Resume.pdf)

## Agent resources

- [Agent instructions](https://jongan.com/llms.txt)
- [XML sitemap](https://jongan.com/sitemap.xml)