Zark Khan
Mobile Developer
Zark brings over six years of production engineering experience building and scaling Android and iOS applications across fintech, automotive/EV charging, and healthcare. He specializes in Clean Architecture, MVVM, and state management patterns (BLoC, Riverpod) that keep mobile codebases modular and rock-solid.
His engineering spans hardware and financial primitives—from Visa/Mastercard tokenization and BLE hardware communication to real-time wallet systems and WebSockets. Having delivered apps from napkin sketch through App Store and Google Play releases, Zark focuses on deep memory optimization, crash reduction, and automated CI/CD deployment pipelines.
What Zark works on
Cross-Platform Mobile Architecture
Architects modular Flutter and React Native applications using Clean Architecture, BLoC, and Riverpod patterns for long-term maintainability.
Fintech & Tokenized Payments
Integrates Visa/Mastercard tokenization, payment gateway SDKs, encrypted wallet architectures, and secure financial transaction workflows.
Hardware & BLE Integrations
Builds real-time Bluetooth Low Energy (BLE) communication protocols for automotive diagnostics, EV charging stations, and IoT hardware.
Performance & Store Releases
Optimizes cold start times, eliminates memory leaks, minimizes crash rates, and automates CI/CD releases across App Store Connect and Google Play.
Tools and technologies
Mobile & Cross-Platform
- Flutter
- Dart
- React Native
- Kotlin
- Swift
- Android SDK
- iOS Development
Architecture & State
- Clean Architecture
- BLoC
- Riverpod
- MVVM
- Provider
- Dependency Injection
Payments & Hardware
- Tokenization (Visa/Mastercard)
- Payment Gateway SDKs
- BLE (Bluetooth Low Energy)
- Crypto Wallets
- Ethereum APIs
Backend & Cloud
- Node.js
- Express.js
- Firebase
- Firestore
- Appwrite
- AWS (EC2, S3)
- REST APIs
- WebSockets
- JWT
DevOps & Data
- CI/CD Pipelines
- GitHub Actions
- Google Play Console
- App Store Connect
- SQLite
- Git
Selected work
- 01
6+ years of cross-platform mobile engineering
Architected, built, and launched production mobile applications across Flutter and React Native serving fintech, automotive, EV charging, and healthcare sectors.
- 02
Automotive & EV charging mobile ecosystem
Led mobile engineering for EV charging platforms, implementing real-time charging status services, BLE hardware interaction, and secure wallet charging mechanisms at Coeus Solutions.
- 03
Tokenized payment SDK integration
Engineered secure Android-based payment SDK integration with Visa/Mastercard tokenization, encrypted storage, and JWT session handling for financial transactions.
- 04
Startup speed & memory optimization
Optimized application rendering lifecycle and memory allocations, significantly reducing crash rates and accelerating startup speeds on low-memory devices.
- 05
Bond app concept-to-release leadership
Delivered the Bond mobile application from initial concept through production App Store release at Magus Global (Dubai), implementing reward systems and AWS backend deployment.
- 06
Telemedicine platform with real-time video
Built healthcare mobile apps with live video consultation SDKs, encrypted medical records storage, appointment scheduling, and instant push notifications at Magnatec Systems.
- 07
Crypto wallet & POS transaction systems
Developed cryptocurrency wallet applications and point-of-sale platforms integrated with Ethereum smart contracts and multi-currency payment gateways at Maqware Solutions.
