Lead iOS Developer in Islamabad

Hadia Chaudhary

I build intuitively designed, AI-powered subscription apps where engineering, user experience, and revenue are one discipline.

See my work

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Open to workFull-time, contract and freelance

8+ yearsShipping for iPhone and iPad since 2018

4.5+App Store rating held release after release

40%Stability gain from Crashlytics and profiling work

15%Fewer drop-offs after an onboarding rebuild

Coming soon to the App Store

BillBuddy

My indie app: a simple, intuitive way to track recurring services, bills, and renewals in one place, so you’re always one step ahead of your next payment.

SwiftUILottieDesign systemIndie

Apps on real phones, in real places.

My client work ships under NDA, so names stay private.

Healthcare
iOS
Video consultations

Telemedicine platform

Healthcare provider in Europe

Architected a scalable iOS platform for video consultations, AI-driven workflows and secure patient data.
Built an offline-first architecture with resilient networking, so consultations hold up on weak connections.
Integrated real-time communication SDKs behind secure APIs.

SwiftReal-time videoOffline-firstSecure data

Productivity
iOS
Audio + journaling

Voice journaling app

Consumer recording and journaling app

Built seamless recording, playback and voice-based journaling flows.
Designed secure local persistence for recordings and journal entries.
Tuned performance and offline access so every entry is there when you need it.

AVFoundationLocal persistencePerformance

Events
iOS
Large-scale, offline-first

Conference event app

US event-tech platform for international events

Built and maintained an offline-first app for events with tens of thousands of attendees, reliable in packed halls with no signal.
Designed a Realm-based persistence and sync system on Operation Queues: background sync, local-first UI and batched APIs for peak traffic.
Migrated networking to a custom URLSession layer with Codable for better performance.

RealmBackground syncURLSessionCodable

More client work

Also under NDA.

Subscription consumer app

Paywall A/B tests with Superwall, CleverTap engagement campaigns, dark mode, multilingual support, push and geofencing.

−15%

registration drop-off after the onboarding rebuild

Legacy app, modernised

Objective-C to Swift migration with MVVM, key screens rebuilt in SwiftUI, RevenueCat subscriptions and CloudKit multi-device sync.

+40%

app stability, with release turnaround cut 30% via Fastlane and GitHub Actions

Hardware companion app

Core Bluetooth integration for real-time communication with BLE peripherals, plus camera and location features, across every iPhone and iPad size.

BLE

real-time link between iPhone and custom hardware

Open on GitHub.

Client code stays private, so these repos are where you can read mine. Each one is a focused SwiftUI or UIKit build: clean MVVM, real APIs and the animation and audio work I enjoy most.

My PortfolioMy résumé as an app

AudioEffectsPlayer screen with pitch, speed and effect controls

Audio EffectsReal-time audio effects

BlockbusterVault movie grid and movie details screens

Blockbuster VaultMovie catalog

LottieAnimationGallery playing an animation with scrub and speed controls

Lottie GalleryPlayback controls

SweetTreatsGuide dessert list and recipe screens

Sweet TreatsDessert recipes

Recreated iPhone Screen Distance warning screen

Screen DistanceiOS warning, recreated

MyPortfolioMy résumé as a native SwiftUI app. Tab-based, with separate feature modules for experience, education and career goals, each with its own view model.

SwiftUIMVVMFeature modules

AudioEffectsPlayerA custom audio engine with real-time pitch, speed, reverb and delay, driven by custom SwiftUI sliders and a live visualiser.

AVAudioEngineSwiftUIMVVM

LottieAnimationGalleryA grid of live Lottie previews with play, pause, speed and scrubbing controls, bridged into SwiftUI with UIViewRepresentable.

LottieUIViewRepresentableNavigationStack

BlockbusterVaultPopular movies from a REST API in a grid, with ratings, genres and production details, plus image caching for smooth scrolling.

REST APIJSONImage caching

SweetTreatsGuideDessert recipes from an API, with ingredients, step-by-step instructions and embedded video.

SwiftUIMVVMWeb content

iPhoneScreenDistanceAnimationA UIKit recreation of the iOS Screen Distance warning animation.

UIKitSPMViewAnimator

Browse all 34 repositories on GitHub

Everything between the idea and the App Store.

From architecture and sync to paywalls, pipelines and release day.

Languages and UI

Swift, Objective-C, SwiftUI, UIKit, Auto Layout, reusable design systems

Architecture

MVVM, VIPER, MVP, Clean Architecture, Repository pattern, server-driven UI

Data and sync

Combine, RxSwift, Core Data, Realm, SQLite, CloudKit, offline-first sync

Monetisation

RevenueCat, Superwall, StoreKit subscriptions, paywall A/B testing

Growth and analytics

Firebase, CleverTap, Crashlytics, push campaigns, geofencing

Connectivity

Core Bluetooth (BLE), REST, GraphQL, WebSockets, location services

Testing and delivery

XCTest, XCUITest, TDD, Fastlane, Bitrise, GitHub Actions, CircleCI, Jenkins

AI workflow

Claude, ChatGPT, Cursor, GitHub Copilot, Apple Intelligence APIs, MLKit

Eight years, always climbing.

Tap a waypoint on the ridge to see each role.

2022 to now

Devsinc, Islamabad

Lead iOS Developer

Drive features end to end, from UX collaboration through App Store submission.
Set up Superwall paywall A/B tests and CleverTap engagement analytics.
Shipped dark mode and multilingual support (20% accessibility gain), push notifications and geofencing.
Rebuilt onboarding for 15% less drop-off and kept the rating above 4.5.
Brought AI tools into the workflow, cutting development cycle time by about 20%.

Built for low signal.

I've spent eight years on iPhone, and the problem I keep coming back to is the same one I meet in the mountains: what happens when the connection disappears. A doctor's call on a weak network. A conference hall with ten thousand phones and no Wi-Fi. A voice note that has to be there tomorrow.

So I design apps local-first. Data lands on the device, sync happens quietly in the background, and the interface never makes you wait for a server to feel responsive.

The other half of the job is the business: paywalls, trials, onboarding funnels and the A/B tests that prove what converts. These days I work AI-assisted, with Claude, Cursor and Copilot, so I can spend more time on the decisions that matter.

Experience: 8+ years, since 2018
Current role: Lead iOS Developer, Devsinc
Platforms: iOS and iPadOS
Education: BS Computer Science
Based in: Islamabad, Pakistan (UTC+5)
Open to: All roles, remote or on-site

Above the treeline.

When I'm not shipping, I'm usually somewhere colder and higher.

Movies

A great film and a great app share one rule: every cut and every transition has to earn its place.

Travelling

New places, new constraints. Every trip is a lesson in designing for people who aren't like you.

Mountains

No signal, real stakes. The best reminder of why offline-first matters.

Snow

My favourite weather. Try the snow button at the top of the page.

Hadia on a snowy forest trail with a trekking pole — Snowline trail

Hadia on a boat on a turquoise mountain lake — Turquoise water, granite walls

Shot on iPhone, of course.

Let's build something that works anywhere.

Open to full-time, contract, and freelance iOS roles across Lead and Senior positions. Remote or on-site. Available for indie app mentoring.

ch.hadia.work@gmail.com

Connect on LinkedIn