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Are you looking for a Senior Mobile Architect who doesn't just write code, but designs scalable, high-performance architectures, leads engineering teams, and bridges the gap between cross-platform frameworks and Native systems? I am a Senior Software Engineer with 9 years of professional experience, including over 5 years acting as a Mobile Architect and Tech Lead. My core specialization lies in building enterprise-grade React Native and Flutter applications, backed by a deep, production-tested foundation in Native iOS (using Swift) and Android (using Java). Having heavily operated in the Fintech and Banking domains, I excel at turning complex business requirements—such as Customer 360 dashboards, Lead or Campaign pipelines, and high-security eKYC systems—into seamless, secure, and production-ready mobile applications. 🚀 WHY PARTNER WITH ME? Cross-Platform Mastery with Native Performance: I deep-dive into React Native’s New Architecture (Fabric, TurboModules, JSI, and Codegen). If an open-source library doesn’t cut it, I build custom Native Bridges and standalone iOS or Android SDKs from scratch to handle heavy system-level processes. Fintech & Banking Domain Expertise: Extensive experience implementing high-security modules including eKYC via NFC (reading chipped ID cards), asset portfolios, secure data storage, data masking or encryption, and certificate pinning. AI-Driven Development Velocity: I leverage state-of-the-art AI tooling (Claude Code, Cursor, Custom Rules, and MCP to Figma automation workflows) to accelerate development speed by converting designs to clean, scalable code without sacrificing architectural integrity. Proven Leadership & Scalability: As a Tech Lead, I have designed Clean Architectures and Monorepo structures using Nx that reduced UI development time for entire engineering teams by 30 percent. 🛠 TECHNICAL SKILLS & TOOLKIT Cross-Platform & Core RN: React Native (TypeScript and JavaScript), Flutter, Advanced State Management (Zustand, TanStack Query), React Navigation, Reanimated. Native Mobile Engineering: Android (Java), iOS (Swift), Custom Native Modules, Mobile SDK Development (Behavior tracking, Inter-app messaging). Performance Engineering: Memory leak debugging, render optimization (useCallback, useMemo, handling large lists), Hermes engine, high-performance local storage (MMKV). Real-time Capabilities: Enterprise-grade real-time messaging (Social Inbox integration via WebSockets and Socket IO) featuring automated reconnection and state synchronization. Architecture & Infrastructure: Clean Architecture, Shared Component Ecosystems, Monorepos (Nx), Unit Testing (Jest), Firebase Crashlytics. Fullstack Capabilities: Web Frontend (Angular), Backend Ecosystems (NodeJS, Express, and NET). 💼 HIGHLIGHTED PROJECT EXPERIENCE 1. Enterprise Banking App & Customer Data Platform (CDP) Role: Mobile Architect & Tech Lead Impact: Architected the entire core mobile application using Clean Architecture and Nx Monorepos. Engineered an independent Native SDK (Swift and Java) for user behavioral tracking and inter-app communication. Key Features: Designed core banking modules (Leads, Opportunities, Customer 360, Asset Portfolios) and integrated secure eKYC via NFC chip scanning. 2. Real-Time Omnichannel Social Inbox Impact: Developed a real-time communication platform handling customer messages across multiple social channels (Facebook, Instagram, Zalo) via WebSockets, optimizing conversation distribution and offline synchronization. 3. Enterprise CRM Systems Role: Web & Systems Engineer Impact: Built and maintained robust internal backend services using NodeJS and NET, alongside enterprise web portals using Angular, cementing a strong foundation in high-scale systems. 🎓 EDUCATION & QUALIFICATIONS B.S. in Computer Science – Hanoi University of Industry (Good Degree Classification) Whether you need a rock-solid foundation for a brand-new banking application, a rescue mission for a laggy cross-platform app, or a technical leader to guide your mobile strategy, let’s jump on a call and bring your vision to life. Click "Invite to Job" or "Message" to discuss your project!

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.

Hello, I’m an Embedded Firmware & Hardware Engineer with solid experience in developing IoT, automation, and wireless systems. I specialize in low-level firmware design, communication protocol integration, and user interface development, combined with practical hardware design and testing. My goal is to deliver robust, efficient, and production-ready solutions tailored to your needs. 🔧 Key Experience ► Embedded firmware design: Bare-metal & RTOS (C/C++) ► Board bring-up, debugging & validation ► Hardware schematic & PCB design (analog, digital, mixed-signal) ► Parts selection, BoM creation & manufacturing file preparation ► Power supply design: DC-DC (buck/boost), linear regulators ► Documentation & source code management 🛠 Microcontrollers & Platforms ► STM32 (Cortex-M0+/M3/M4/M7) ► ESP32, ESP8266 ► nRF52 series ► Holtek, PY32, MG82F6D17 ► Arduino, Raspberry Pi 🔗 Interface Protocols ► UART, SPI, I2C, RS485 ► QUADSPI, ADC, DAC ► USB 2.0, USB 3.0 📡 Wireless & Communication ► Wi-Fi, BLE (Bluetooth Low Energy) ► Ethernet, 4G/LTE ► LoRa, LoRa Mesh, LoRaWAN ► NFC, RF Modules, Power Amplifiers 📺 Displays & Modules ► UI development with LVGL on TFT Touchscreens ► LCD, OLED Displays ► Sensor integration (temperature, GPS, ultrasonic, laser) ⚡ Hardware & PCB Design ► Multi-layer PCB design (1–6 layers) ► Impedance-controlled routing, high-speed interfaces ► Mixed-signal circuit design (ADC/DAC, filters, amplifiers) ► Motor control: BLDC, Stepper, Servo, DC ► RF & antenna design basics 🏆 What I Deliver ✔️ Reliable embedded firmware (C/C++) with efficient drivers & protocols ✔️ Robust, manufacturable hardware designs ✔️ End-to-end IoT & embedded solutions (from prototype to production) 🤝 Let’s work together to turn your embedded system ideas into scalable, reliable products.

I have 5 years+ of experiences developing mobile apps. I have worked in FPT Software with many well-known clients such as Boeing, Canon, Softbank, P.S Solution. I’m currently working with Canadian customers. 📱App I made from scratch * Cantec Courier * Cantec Driver 🧑‍💻 IOS Skills * Swift / SwiftUI / RxSwift * MVC / MVP / MVVM / VIPER * Push Notifications * Bluetooth (BLE) * Core Locations * Localization * REST API (JSON, XML) * App submission/ Testflight 📦 Database: * Realm * Core Data * MySQL 🛠 Integrations * Facebook, Instagram, Google Firebase, Dropbox * Google maps, Mapbox * Amazon Web Service (Amplify, S3, SNS, DynamoDB, Cognito…etc) * Fastlane 📊 Workflows: * Github, Gitlab, Bitbucket * Trello, Jira

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.

Over 7 years of experience building mobile apps for iOS and Android, from first concept to a live listing on the App Store and Google Play. I work fluently in both native languages (Swift, SwiftUI, Java, Kotlin, Jetpack Compose) and cross-platform frameworks (React Native, Flutter), so I can recommend the right approach for your product instead of forcing one stack onto every problem. That broad experience helps clients make the call that fits their goals. Should you use React Native or Flutter to ship faster and lower cost? Should you go native for maximum performance and the latest platform features? Those are exactly the trade-offs I help you weigh before a line of code is written. I don't just build to a spec, I help define it. I can join at any stage of the app lifecycle: clarifying requirements, UX and architecture decisions, development, testing, release, and post-launch iteration. I've taken apps through the full App Store and Google Play submission and review process many times and can guide you through it smoothly. WHAT I BRING + Platforms: iOS (iPhone, iPad), Android (phone, tablet) + Native: Swift, SwiftUI, UIKit, Objective-C basics, Java, Kotlin, Jetpack Compose + Cross-platform: React Native, Flutter (Dart), Expo + Languages: Swift, Kotlin, Java, JavaScript, TypeScript, Dart + Backend & data: RESTful and GraphQL APIs, Firebase, real-time sync, offline-first data, local storage (SQLite, Realm, Core Data) + Common features: Google/Apple Maps, geolocation, push notifications (FCM, APNs), in-app purchases, subscriptions, Stripe and payment integrations, social login, camera and media + Architecture: MVVM, MVC, Clean Architecture, state management (Redux, Provider, Bloc) + Quality: unit and UI testing, high code coverage, debugging and crash reporting (Crashlytics, Sentry) + Performance: optimizing battery, smoothness (60fps UI), memory, and network usage + Release & DevOps: App Store and Google Play submission, TestFlight, Fastlane, CI/CD for mobile (GitHub Actions, Bitrise) + Tools: Xcode, Android Studio, VS Code, Git Whether you need a new app built from scratch, an existing one improved and stabilized, or advice on the best technical path forward, I'd be glad to help you ship something users actually enjoy.