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𝗜𝗺𝗮𝗴𝗶𝗻𝗲 𝘁𝘂𝗿𝗻𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝘄𝗲𝗯 𝗮𝗽𝗽 𝗶𝗻𝘁𝗼 𝗮 𝗿𝗲𝗮𝗹 𝗶𝗢𝗦 & 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗮𝗽𝗽 𝗻𝗼𝘁 𝗮 𝘀𝗹𝗼𝘄 𝘄𝗲𝗯𝘃𝗶𝗲𝘄, 𝗻𝗼𝘁 𝗿𝗲𝗷𝗲𝗰𝘁𝗲𝗱 𝗯𝘆 𝗔𝗽𝗽𝗹𝗲, 𝗮𝗻𝗱 𝗻𝗼𝘁 𝗹𝗼𝘀𝗶𝗻𝗴 𝘂𝘀𝗲𝗿𝘀. Right now, most SaaS founders and businesses are losing users and revenue because their apps are not optimized for mobile, their App Store submissions get rejected, their Stripe or Supabase setup breaks on mobile, or their AI-powered systems are not working as expected. That’s where I come in. I help you convert, build, fix, and scale high-performance mobile apps and AI SaaS systems using Claude Code, React Native Expo, OpenClaw, and modern vibe coding tools without trial and error. ⚠️ If You’re Experiencing Any of These: ❌ Your web app needs to be converted to iOS & Android ❌ Apple keeps rejecting your app or it behaves like a webview ❌ Stripe payments or Supabase auth not working on mobile ❌ Your Lovable, Replit, or Base44 app is broken or incomplete ❌ Your AI SaaS or automation system is not performing ❌ Push notifications, offline mode, or native features missing 👉 You’re losing users, retention, and revenue every single day. ✅ 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 (𝐀𝐧𝐝 𝐃𝐨 𝐁𝐞𝐭𝐭𝐞𝐫 𝐓𝐡𝐚𝐧 𝐌𝐨𝐬𝐭): 🔥 Web App to Mobile App Conversion Done Right No weak webviews. I convert your web app into a real mobile app using React Native, Capacitor, or Expo with native performance and smooth UX. 🔥 AI SaaS & MVP Development That Actually Works I build scalable AI SaaS apps and MVP platforms using Claude Code, OpenClaw, Gemini, and modern stacks designed for real-world usage and growth. 🔥 Vibe Coding & AI App Development From Lovable, Replit, and Base44 apps to full AI-powered systems, I fix, rebuild, and optimize apps using advanced AI assisted development tools. 🔥 Mobile App Deployment & Store Approval I handle App Store and Google Play submission, fixing rejection issues, optimizing performance, and ensuring your app gets approved and live. 🔥 OpenClaw Automation & Backend Systems I build smart automation workflows, API integrations, and backend systems that reduce manual work to your business operations. 💰 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐆𝐞𝐭: ✔️ High-performance mobile apps (iOS & Android) ✔️ Faster App Store approval & successful deployment ✔️ Working Stripe, Supabase, and backend integrations ✔️ AI-powered SaaS systems that scale with your business ✔️ Clean UI/UX with smooth performance and real native experience ✔️ Less manual work, more automation, more revenue 🧠 𝐖𝐡𝐲 𝐇𝐢𝐫𝐞 𝐌𝐞? Most developers: ❌ Build slow webview apps ❌ Break features during conversion ❌ Don’t understand deployment or AI systems I don’t. I understand both: ✔️ Mobile app architecture (what gets approved & performs well) ✔️ AI SaaS systems & automation (what actually works in production) That combination is why my clients don’t come back saying 👉 “It’s not working.” ⚡ Let’s Be Direct: If your app is not optimized for mobile, not deployed properly, or your AI system is not working… You are already losing users, growth, and revenue every single day. 📩 Next Step: Send me a message or invite me to your job. I’ll quickly review your project and tell you: ✔️ What’s wrong ✔️ What’s missing ✔️ What’s blocking performance ✔️ How to fix it fast No fluff. Just results. ai saas development, ai web app, ai app development, ai integration, ai agent systems, claude code, claude cowork, E commerce Website gemini ai, vibe coding, lovable ai app, replit app, base44 app, react native developer, react native expo, flutter app, mobile app development, ios android app, web app to mobile app, pwa to ios android, app conversion, app deployment, app store deployment, google play deployment, firebase, push notification, mvp app development, api integration, supabase, postgresql, authentication system, stripe integration, push notifications, offline mode, n8n automation, backend automation, app debugging, fix existing app, Progressive Web App, production ready app, next js, node js, mern stack, full stack development, frontend development, backend development, cross platform mobile app, hybrid mobile app, android app developer, ios app developer, ai saas mvp, ai web application, ai chatbot, api development, web developer, webhook integration, supabase auth, firebase auth, real time database, vercel deployment, cloud deployment, mobile app ui ux, dashboard, admin panel, crm system, booking system, real estate, ai video, higgsfield ai, stripe, firebase, supabase, website migration, lovable to ios, android kotlin, revenuecat, despia, capacitor, ionic angular, codex, react native app, app publish, pwa, vpn app, chrome extension development, ai video generation, App Store submission,Google Play deployment, fix app rejection, PWA to mobile app, Base44 developer, Lovable developer, Bubble developer, Replit developer, Open Claw developer, Vibe Coding developer, No code developer, cordova, polymarket tradind bot, kalshi bot, hermes.

With 3+ years of hands-on experience, I specialize in taking embedded products from prototype to mass production. I've completed 10+ real-world projects and successfully shipped consumer products that are now in end-users' hands. What I Do Best I build production-grade firmware — not hobby projects. My work spans the full embedded stack: hardware bring-up, device drivers, firmware, bootloaders, OTA systems, and companion mobile/PC apps. Core Expertise - MCU Platforms: STM32 (F0/F1/F4/L0/L4), ESP32/ESP32-S3/ESP32-P4/ESP32-C3, nRF52480/NRF52832, ARM Cortex-M & RISC-V, ... - RTOS & Bare-Metal: FreeRTOS (advanced task sync — queues, semaphores, event groups, task notifications), bare-metal programming, custom bootloader development, ... - Peripherals: I2C, SPI, I2S, UART, PWM, ADC/DAC, RMT, Modbus RTU, USB HID, ... - Connectivity: Wi-Fi, BLE, LoRa, NFC, GSM/GPRS, NB-IoT, 4G, ... - IoT & Cloud: MQTT, HTTP/HTTPS, WebSocket, TCP/UDP | Azure IoT, AWS, Firebase, ... - Security: Secure Boot, encrypted NVS storage, FIDO2 passwordless authentication - Languages: C/C++ (primary), Python, Dart/Flutter (mobile & desktop apps), Java - Sensors: Accelerometer, IMU, Gyroscope, Time-of-Flight (ToF), Fingerprint, Ambient Light, Temperature, Humidity, Water Quality, Gas, Heart Rate & SpO₂, ... - Peripherals: Camera, Microphone, Speaker, Buzzer, ... - Displays: TFT, OLED, LCD, HMI, ,.. - Build & Debug: ESP-IDF, Makefiles, CMake, linker scripts, GCC toolchain, GDB/JTAG — fully IDE-independent - Other: Embedded Linux (Raspberry Pi, Orange Pi), Edge AI on MCUs, VoIP, WireGuard VPN, OTA update systems, PCB design (EasyEDA) What Sets Me Apart I deliver production-ready firmware, not proof-of-concepts. Clean architecture, proper error handling, memory optimization, and power management. I work at the toolchain level — Makefiles, linker scripts, GCC, GDB — not dependent on any IDE. I collaborate effectively with backend teams, including building systems using MCP (Model Context Protocol). I've shipped real consumer electronics — I understand what it takes to go from "it works on my bench" to "it works in 10,000 units." If you're a startup building a hardware product and need someone who can take it from prototype to production, let's talk.

🚀 Ranked #1 iOS Developer on Upwork in Vietnam 🇻🇳 Trusted by startups and growing businesses to build, launch, and scale native iOS apps With 9+ years of experience in Apple development, I've helped startups, SaaS companies, and growing businesses transform ideas into high-quality native iOS applications used by thousands of users. Whether you're launching a new product, modernizing an existing app, or bringing your Android/Web platform to iOS, I deliver scalable, maintainable solutions with clean architecture and an exceptional user experience. What I can help your business with - End-to-end iOS app development - Native iOS apps using Swift & SwiftUI - Convert Android/Web apps into iOS apps - MVP development for startups - Long-term product maintenance & scaling - Performance optimization & refactoring - UI/UX implementation with pixel-perfect accuracy - App architecture improvement & technical consulting - Team collaboration and Agile/Scrum workflow Technical Expertise - UI Development: UIKit, SwiftUI, Auto Layout, Core Animation - Reactive Programming: RxSwift, Combine - Networking & API Integration: RESTful APIs, URLSession, Alamofire - Backend & Cloud Services: Firebase, Firestore, Authentication, Analytics - Push Notifications: APNs, Firebase Cloud Messaging (FCM), OneSignal - Architecture Patterns: MVVM, Clean Architecture, Modular Architecture - Local Storage & Database: CoreData, UserDefaults, Realm - Media & Realtime Features: AVFoundation, WebSocket - AI & AR Features: CoreML, ARKit, Vision Framework - Authentication & Security: OAuth, JWT, Keychain - Maps & Location Services: MapKit, CoreLocation, Google Maps SDK - Testing & Debugging: XCTest, Instruments, Memory Leak Detection - CI/CD & Version Control: Git, GitHub, Fastlane, Xcode Cloud - Project Management: Agile, Scrum, Jira, Trello Why clients work with me - 9+ years of professional iOS experience - Successfully launched and maintained production apps - Strong focus on clean, maintainable, scalable code - Clear communication and reliable delivery - Experience collaborating with startups and remote teams - Detail-oriented with strong debugging and problem-solving skills - Long-term partnership mindset I care about building stable products that support real business growth — not just writing code. If you’re looking for a reliable iOS engineer to build, improve, or scale your mobile product, let’s connect.

𝐖𝐞 𝐨𝐟𝐟𝐞𝐫 𝐅𝐑𝐄𝐄 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐚 𝐅𝐑𝐄𝐄 𝐪𝐮𝐢𝐜𝐤 𝐫𝐞𝐯𝐢𝐞𝐰 𝐨𝐟 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭, 𝐚𝐧𝐝 𝐮𝐬𝐮𝐚𝐥𝐥𝐲 𝐫𝐞𝐬𝐩𝐨𝐧𝐝 𝐰𝐢𝐭𝐡𝐢𝐧 𝐚 𝐟𝐞𝐰 𝐡𝐨𝐮𝐫𝐬. We are Teaser Software, an ITO company based in Hanoi, Vietnam. If you’re looking for a reliable team to take your project from idea → design → development → launch → maintenance, while leveraging AI to accelerate development and improve efficiency without compromising quality, you’re in the right place. Whether you already have a detailed specification or just an initial idea, we can help shape it into a clear roadmap with realistic timelines and costs. 𝐋𝐞𝐭’𝐬 𝐜𝐨𝐧𝐧𝐞𝐜𝐭. 𝐉𝐮𝐬𝐭 𝐬𝐞𝐧𝐝 𝐮𝐬 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐚𝐧𝐲𝐭𝐢𝐦𝐞. 𝐖𝐞 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐭𝐢𝐦𝐞 𝐳𝐨𝐧𝐞𝐬, 𝐬𝐨 𝐨𝐮𝐫 𝐭𝐞𝐚𝐦 𝐢𝐬 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝟐𝟒/𝟕, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐰𝐞𝐞𝐤𝐞𝐧𝐝𝐬.

I’m Hamza a Biomedical Engineer with a passion for Embedded Systems, IoT, Electronics, and Robotics. I turn ideas into real, working prototypes and products. Whether it’s designing smart devices, building automation systems, or creating medical technology, I bring innovation to life. What I Do Best: Embedded Systems & IoT Experience with ESP32, NRF52, ATMEL, STM32, PSOC, PIC Work with Raspberry Pi, VisionFive (Linux Board), and Unihiker Programming Proficient in C/C++, Python, Java, MATLAB, JavaScript, and Flutter Connectivity & Communication Skilled in UART, I2C, SPI, MQTT, BLE, BLE Mesh, Sigfox, and Wi-Fi Hardware Design & Prototyping Specialize in PCB Design, 3D Modeling, and Product Prototyping GUI Development Develop Touchscreen Interfaces, E-Paper & TFT Displays, Web Dashboards, and Desktop Applications Work with LVGL, Tkinter, PyQt, and Kivy Framework IoT & Cloud Integration Experienced with AWS IoT, Firebase, ThingsBoard, and WebSocket-based real-time control Industrial IoT (IIoT) Expertise in CAN Communication, Factory Automation, and Smart Sensor Networks Remote Monitoring & OTA Updates Work with ESP-IDF OTA, BLE DFU, and Cloud-Based Device Management I’ve built industrial prototypes, smart sensors, automation systems, and medical devices, real-time data processing and device connectivity. If you need a reliable, high-quality solution, let’s make it happen! Let’s Collaborate!

Need an AI-powered mobile app shipped to the App Store in weeks, not months? You'll get a production-ready React Native & Expo app with AI integration and real monetization built in — so you launch fast and start earning from day one. I help startups, founders, and SaaS businesses turn ideas into revenue-generating iOS and Android apps using React Native, Expo, and LLM APIs (OpenAI, Claude, Gemini). Clean TypeScript, scalable architecture, cross-platform performance — not just a demo that looks nice in Figma. ⭐⭐⭐⭐⭐ "Very professional delivery on time and quality work. Highly recommend." — Recent Client What I Build ✅ AI-Powered Mobile Apps — AI chatbots, voice AI, OCR, LLM integrations, prompt engineering ✅ SaaS & Subscription Apps — paywalls, free trials, recurring revenue with RevenueCat, Superwall, Stripe & In-App Purchases ✅ Startup MVPs — idea to App Store & Google Play in weeks using Expo EAS Build & Submit ✅ Cross-Platform iOS & Android Apps — one clean codebase, native-level performance, production-grade quality ✅ Real-Time Apps — push notifications (FCM, OneSignal, Expo Notifications), messaging, deep linking, WebSockets Tech Stack ✅ Mobile: React Native, Expo, Expo Router, TypeScript, Reanimated, React Navigation ✅ State Management: Redux, Redux Toolkit, Zustand, React Query, Context API ✅ Backend & Database: Node.js, Firebase, Supabase, PostgreSQL, MongoDB, REST APIs, GraphQL ✅ AI & LLMs: OpenAI API, Claude API, Gemini, LangChain, RAG, Voice AI (Whisper, Deepgram) ✅ Monetization: RevenueCat, Superwall, Stripe, Apple Pay, Google Pay, In-App Purchases ✅ Deployment: Xcode, TestFlight, App Store Connect, Play Console, Expo EAS, OTA Updates, CI/CD, Fastlane Why Clients Hire Me ✅ 4+ years of React Native & Expo development for startups worldwide ✅ 20+ cross-platform mobile apps shipped to App Store and Google Play ✅ AI-accelerated delivery using Cursor, Claude Code & GitHub Copilot — faster ship times, same code quality ✅ Scalable, clean architecture — your app stays fast as it grows ✅ Store compliance expertise — proven track record of App Store and Google Play approvals ✅ 0–4 hour response times with daily updates How I Work ✅ Free 30-min discovery call to align on goals, scope, and timeline ✅ Clear proposal with milestones and fixed delivery dates ✅ Daily updates — you always know what's shipping next ✅ App Store & Google Play submission included ✅ Post-launch support for scaling and new features Types of Apps I Ship ✅ AI chatbots, voice assistants & LLM-powered apps ✅ Subscription-based SaaS mobile apps ✅ eCommerce & marketplace platforms ✅ Booking & on-demand service apps ✅ Social, dating & community apps ✅ Health, fitness & wellness apps ✅ Real-time chat & messaging apps Let's Build Your App If you need a React Native developer who ships production-ready apps with AI and real monetization built in , let's talk. 📩 Send me a message with your project details. I reply within 4 hours and offer a free 30-minute strategy call to map out your fastest path to launch.