Hire the Best Sencha Touch Developers in Karachi, PK

Most developers build you an app. I build you a product. There's a difference. An app is code that works. A product is something users keep using, and pay for. I know the difference because I've shipped both sides. I built core modules for Traderverse, a social trading platform that scaled to 28,000 users with real-time feeds, live portfolio tracking and Swift Charts. I've also published four of my own apps on the App Store, funded with my own money: Balancio, Just Invoice, Scan IT, and Timey. When you self-publish, you learn fast which decisions actually matter: paywall placement, subscription flows, onboarding, App Store review. What I build: * Native iOS in Swift and SwiftUI (MVVM, SwiftData, Combine, AlarmKit, VisionKit) * Subscriptions and monetization with RevenueCat, StoreKit 2, paywalls, entitlements * Backend and auth using Firebase, Supabase, social sign-in, cross-device sync * Real-time data via WebSockets, live feeds, Swift Charts for financial and analytics UIs * Localization into 5+ languages including Arabic RTL with full UI mirroring * Shipping through Xcode Cloud, TestFlight, App Store Connect, ASO What you can expect: * Conservative estimates. I'd rather quote four weeks and deliver in three * Early warnings when something is at risk, not surprises at handoff * Honest scoping. If a request is outside my strength, I'll say so upfront * Products shipped end to end, from concept through App Store review and ASO I also work in React Native and Flutter for cross-platform projects, and build web SPAs in Vue and React, including Trader Analytics, a live equities dashboard with 80+ KPIs and subscription tiers. Both my Upwork contracts closed at 5.0 with 100% Job Success. Available for a call to talk through what you're building.

As a highly skilled embedded systems engineer with 8+ years of experience and a passion for IoT and cutting-edge technology, I specialize in the design and development of advanced embedded systems using a variety of platforms and tools. Here is a list of my core skill set: 1. Extensive experience in embedded C, C++ and RTOS 2. ESP32 using IDE such as IDF, Arduino and platformIO and combination of these platforms for complex projects 3. ARM cortex MCUs such as STM32 and TI MSP series using KEIL. 4. Bluetooth Low Energy (BLE) application development using nRF52 SoCs and NRF5 SDK. Firm grip in BLE protocols. 5. Raspberry Pi with Python for IoT and GUI applications. 6. Also have vast experience in PIC, Atmel, NXP for complex application and low level driver development (Bare metal programming) 7. Schematic and multilayer PCB designing for high speed and complex embedded systems using Altium, Eagle etc. 8. Advance GUI based applications using LCD and e-Paper display. 9. Vast experience in varieties of pheripherals such as EEPROM, camera (object / face recognition), SD Card, 3G / 4G module, GPS, RF transceivers and BLE and sensors such as motion, accelerometer/ gyroscope, infrared, RFID, NFC, pH, TDS, proximity, magnetic and temperature. 10. Communication - UART, SPI, I2C, CAN etc. 11. Internet of Things - MQTT, HTTP & NodeRed, RestFul API's and AWS IoT 12. MATLAB: Image processing and power electronics application

I build Flutter apps people actually depend on. The Courier App runs 6,000+ UK drivers on code I shipped, and Calcount has 1,000+ users in Australia. 100% Job Success, Top Rated, and I get apps through App Store review on the first try. 🚀 I go deepest on the parts most devs avoid; real-time, payments, hardware; here's the full kit: 📹 Video Calling: Agora, Zego, VideoSDK.live, Jitsi, WebRTC 📞 VoIP: SIP calling and real-time communication 📡 BLE: ESP32-WROOM-32D, Nordic nRF52840, Adafruit Bluefruit nRF52, Keil 💳 Payments: Stripe, In-App Purchases, RevenueCat ☁️ AWS: EC2, CloudFront, S3, Route53, SNS, SES, MediaConvert ⚡ Supabase: Edge Functions, Auth, Realtime, the full stack 🔥 Firebase: Cloud Functions, Cloud Console, Firestore, FCM, Analytics 🗺️ Maps: Google Maps, Mapbox, OpenStreetMap, live tracking, geofencing, navigation 🎬 Media: FFMPEG, HLS streaming, AWS MediaConvert 🤖 AI: OpenAI, Gemini, Claude, YouTube Transcript APIs 🔐 Auth: Email/Password, Phone OTP, Google, Apple Sign-In 💬 Realtime Chat: SocketIO, WebSockets, Google gRPC Protocol Buffers 🗄️ Backend: Node.js, NestJS, Laravel, Django, MongoDB, PostgreSQL 🔔 Notifications: OneSignal, Firebase Push Notifications 🔗 Deep Linking and Referral Systems 📊 Monitoring: Sentry, PostHog (used on every project) 🔄 CI/CD: GitHub Actions, Azure Pipelines 🏗️ Architecture: DDD, Clean Architecture, Repository Pattern, BLoC, Riverpod, Provider 🎨 Animations: Lottie, Custom Painters, complex UI 🛒 E-Commerce: WooCommerce, custom cart systems 📍 Location: Background services, geofencing, live tracking, on-map navigation Don't just take my word for it 💬 🇹🇷 Berk (Voltran, Turkey): "This kind of work ethic is not easy to find" 🇸🇬 John Alam, CEO Nautilus SIP (Singapore): "Shahzad is quite hard-working, he spends good time trying to find the solution and ensures he has tried all possible ways before giving up" 🇬🇧 Chris Hamilton, CEO The Courier App (UK): "If I could relocate Shaz to the UK, I wouldn't let him out of our reach. That probably says enough on its own." Got an idea? A project stuck halfway? Or just need someone who actually cares about your product? Hit that invite button or send me a message. Let's talk 💬 Best regards

🚀 Senior React Native & IoT Engineer | BLE | ESP32 | Embedded Systems | Mobile Apps Top Rated Plus | 100% Job Success | Proven Delivery Record I help startups and businesses build complete connected products—from embedded hardware and firmware to cross-platform mobile applications. Whether you’re developing an IoT device, BLE-enabled product, industrial automation system, or a production-ready mobile app, I can take your idea from prototype to deployment. What I specialize in: * 📱 React Native (iOS & Android) * 📶 Bluetooth Low Energy (BLE) & Classic Bluetooth * ⚡ ESP32, Arduino, Raspberry Pi & Embedded Firmware * 🔌 IoT Systems, MQTT, Wi-Fi & Cloud Connectivity * 🛠 PCB Design Support & Hardware Integration * ☁ Firebase, REST APIs & Real-time Applications * 🤖 Industrial Automation & Smart Device Development Why clients work with me: * ✅ Top Rated Plus with 100% Job Success * ✅ Clear communication and weekly progress updates * ✅ End-to-end development—from hardware to mobile app * ✅ Clean, scalable, and maintainable code * ✅ Reliable delivery with long-term support If you’re looking for someone who understands both hardware and software and can bridge the gap between embedded systems and modern mobile applications, I’d be happy to discuss your project. Let’s build something great together.

Working On Mobile Development for both iOS and Android - Experience of working with Frameworks like MVVM, MVP, Viper etc. - Experience of working with dependency injection (Hilt,Dagger,Koin) - Experience of working with Firebase-Auth, Firestore, Real-time Database, Crashlytics, Analytics, Push Notifications - Experience of working with Google Maps Api (Location, Places etc) - Experience of working with Android POS Terminal (PAX, Verifone, POYNT, Newland NPT, Ingenico, BBPOS) - Experience of working with Card and Payment Solutions - Experience of working with MAG/EMV/NFC based cards - Experience of using Material Design - Experience of working JetPack compose navigation control - Worked on Google Map Application. - Worked on OCR (Optical Character Recognition). - Worked on QR Code Reader (ZXING API) - Worked on Firebase Cloud Messaging (FCM). - Worked on Google Push Notification. - Worked on Social 3rd party APIs. - Worked on Retrofit, OkHttp, Volley etc

Hi, I’m Zeeshan Ali, a seasoned React Native Developer with over 7 years of experience building high-performance, scalable, and visually stunning mobile applications for Android and iOS. I specialize in AI-driven mobile app development, leveraging cutting-edge tools like Cursor IDE, Detox, Sentry, React Native Rollbar, and Firebase Crashlytics to ensure seamless performance, minimal bugs, and faster development cycles. 🔹 Core Expertise & Tech Stack ✅ React Native | Android & iOS — Crafting optimized cross-platform applications with clean architecture and smooth performance ✅ AI-Powered Development — Enhancing productivity with intelligent code automation via Cursor IDE ✅ UI/UX Excellence — Designing intuitive and engaging interfaces using Paper, Chakra UI, MUI, and Animated UI ✅ Backend & API Integrations — Proficient in REST APIs, Social Logins, 3rd-Party Services, and Payment Gateways (Google Pay, Apple Pay, Stripe, Bank Integrations) ✅ Hardware Access & Control — Expert in integrating Camera, Gallery, Bluetooth (BLE), and Wi-Fi modules ✅ Real-Time Communication — Implementing Socket.io, SignalR, and AI-powered Chatbots for interactive experiences ✅ Monetization & In-App Purchases — Implementing React Native IAP for subscription and revenue optimization ✅ Cloud & Database Solutions — Deep experience with Firebase, Realtime Databases, and Cloud Storage ✅ Crash Reporting & QA — Advanced error tracking with Sentry, Firebase Crashlytics, and React Native Rollbar ✅ Push Notifications & Deep Linking — Seamless integration of Firebase Notifications with background, foreground, and deep link handling 🔹 Agile Development & Version Control I thrive in Agile/Scrum environments — ensuring continuous integration, feature enhancement, and transparent collaboration. Skilled with GitHub, Bitbucket, and GitLab for version control, CI/CD, and streamlined deployment pipelines. 🌟 Why Work With Me? I combine AI-assisted efficiency, clean code practices, and real-world experience to deliver apps that are: ⚡ Fast & Scalable 🧠 Intelligently Optimized 🎨 Visually Stunning 🧩 Feature-Rich & Reliable 💡 Let’s connect and discuss how I can help scale your mobile app idea into a high-performing, future-ready product. 📩 Your vision, built smarter with AI and React Native expertise.