Senior iOS Engineer with 16 apps on the App Store, 6 of them solo built — shipped for clients in the US, UK, Ireland, and Australia, with users in 50+ countries.
My core is iOS native (Swift, SwiftUI, UIKit, Objective-C). I specialize in Apple's Screen Time API — Family Controls, ManagedSettings and DeviceActivityMonitor (7 production apps on it, a rare skill) and on-device Machine Learning: CoreML + Vision powering KYC with e-passport NFC, face matching (PyTorch → Core ML), and liveness detection. Also StoreKit 2 and RevenueCat subscription paywalls, encrypted VoIP, blockchain on Bitcoin SV, Core NFC, fintech and payments, and offline MapKit tile caching.
- 📱 16 production apps on the App Store — search them by name
- 🧠 On-device ML — CoreML, Vision, PyTorch model conversion, no cloud round trip
- 🤖 AI-assisted engineering — I ship with Claude Code daily and review every line
- 📖 Published Author — iOS Development using UIKit (243 pages, Apple Books)
- 🤝 Open Source Contributor — SwifterSwift (14.9K+ GitHub stars)
- 🌍 asadchattha.com · Based in Lahore · Open to remote & relocation
Every name below is a live App Store link — tap and check the reviews yourself.
| App | Rating | What I built |
|---|---|---|
| Athanify | ★ 5.0 | My own app · Prayer companion · Solo built, design to launch |
| Shelly | ★ 5.0 | Screen Time control · Custom Shield UI · DeviceActivityMonitor |
| HiiKER | ★ 4.6 | 130K+ trails · Offline maps · Used by Mountain Rescue teams |
| Going Solo | ★ 4.5 | Solo travel social network · Firebase · CoreLocation |
| Focus Bear | ★ 4.5 | ADHD productivity · Apple Watch · HealthKit |
| Pryvate | ★ 4.4 | E2E encrypted VoIP · RSA 4096-bit · 50+ countries |
| Peptify | ★ 4.2 | Medical tracker · On-device Vision OCR |
| Plant Health | — | Plant diagnosis · RAG + local LLM · Vision · Solo built |
| Chapter | — | Habit replacement · Screen Time · Gamification |
| Bright Start | — | Morning routines · Camera light sensing · FamilyControls |
| Block | — | NFC app blocking · ShieldConfiguration · Solo built |
| 1st-Response | — | Field audio recording · Offline-first · Secure upload |
| Officetree | — | Business phone · SIP VoIP · Stripe + Apple Pay |
| Fonder Cards | — | Couples conversation cards · WidgetKit · Real-time shared state |
📖 Bonus: iOS Development using UIKit — my 243-page book on Apple Books.
Full portfolio with screenshots: asadchattha.com
Languages Swift · Objective-C · SQL · GraphQL
UI SwiftUI · UIKit · WidgetKit · Live Activities · ARKit · Combine
Apple frameworks Screen Time (Family Controls, ManagedSettings, DeviceActivityMonitor) · HealthKit · StoreKit 2 · MapKit & CoreLocation · Core NFC · Core ML & Vision · CallKit · AVFoundation · WatchKit
On-device ML Core ML · Create ML · Vision · PyTorch → Core ML conversion
Payments StoreKit 2 · RevenueCat · Superwall · Apple Pay · Stripe · Tap to Pay
Backend & tooling Firebase · Supabase · AWS · Fastlane · Proxyman · Postman · TestFlight · App Store Connect · Figma · Claude Code
My portfolio is a time machine. Rather than one site, it is four, each built in the spirit of a different era of web design. Every one stays online.
| asadchattha.com | Current | Navy and teal, monospace accents, a cursor spotlight |
| v3.asadchattha.com | Minimal | One screen, one sentence, one link, light and dark |
| v2.asadchattha.com | Cinematic | Dark and full bleed, parallax, serif display, dot nav |
| v1.asadchattha.com | Classic | Photo hero, fixed nav, the way portfolios used to look |
Every project I have shipped: asadchattha.com/archive
