Primarily an embedded developer (low-level, hardware registers, etc) but capable of putting my hand to all manner of programming tasks, especially in the mobile domain. With extensive experience in C, Android, Java, C# and web-based technologies such as HTML and CSS, I am capable of working on a multitude of tasks and jobs.

I design and develop embedded electronic devices, working across hardware and firmware from initial design to production-ready systems. I work end-to-end: from schematics and KiCad PCB layout to firmware bring-up, debugging, validation, and preparation for manufacturing. Platforms & systems: • ESP32, STM32, nRF52 • C / C++, ESP-IDF, FreeRTOS, Zephyr, bare-metal Wireless & device protocols: • Wi-Fi, Bluetooth LE, Thread, Matter / HomeKit • Sub-GHz RF (433 / 315 MHz), infrared Hardware & production: • Multilayer PCB design in KiCad (fab-ready files, realistic BOMs) • Hardware bring-up, debugging, and validation • Preparing designs for manufacturing and real-world use Mechanical & product design: • Functional enclosure and mechanical part design (Fusion 360) • Design for 3D printing and rapid prototyping • Mechanical integration of electronics into real products Why work with me: • Production-first mindset — not just working prototypes • Strong understanding of hardware–firmware interaction • Clear communication and realistic timelines If you’re building a device and need an engineer who can turn it into a reliable, production-ready product — let’s talk.

I design and build complete embedded products — from PCB to firmware to software — so you don't need to coordinate three different specialists. 15+ years of experience, low-power and Bluetooth design expertise, and every line of firmware backed by real testing. * Hardware Design ---------------------- I design complete boards in Altium, KiCad, and OrCAD — power section, MCU section, digital and analog peripherals — based on Microchip PIC, ARM Cortex, and ESP32 microcontrollers. Specific areas of expertise include: * Low-power design for battery-powered devices * Shield design for commercial platforms (Arduino, Raspberry Pi, BeagleBone) * PCB design with Bluetooth connectivity (Classic and BLE) * Firmware Development ----------------------------- I write firmware in C for ARM Cortex M0/M0+/M3/M4/M33 architectures (STM32, NXP, Silicon Labs EFM32/EFR32, Nordic nRF5x) and for ESP32 using the ESP-IDF framework, in both bare-metal and multitasking environments (FreeRTOS, RTX). I cover the full application stack: * Low-level drivers (GPIO, UART, SPI, I2C, PWM) * Drivers for sensors, MEMS, memories, fuel gauges, displays * Application logic, bootloaders, and OTA * Bluetooth stacks (Classic and BLE) * Every firmware project I develop comes with unit, integration, and stress testing to ensure robustness and long-term reliability. * Why Work With Me ------------------------ My key strength is cross-domain vision: I can design hardware with the firmware that will run on it already in mind, and write firmware knowing exactly what happens at the electrical level. This reduces iterations, development time, and project risk — real value whether you need fast prototyping or a product ready for mass production. I'm quick to pick up new frameworks and toolchains based on project needs.

Hi, I'm Thao With 14+ years of experience, I specialize in: - ESP32 / nRF52/ nRF53/ nRF54/ nRF91 / STM32 PCB and Firmware (FreeRTOS, Zephyr) - BLE, Wi-Fi, LTE-M / NB-IoT connectivity - Sensor integration and low power optimization - End-to-end IoT systems (device → cloud via AWS IoT/Thingsboard/EMQX/..., MQTT/HTTP/...) 🔧 Firmware Development - Extensive experience with MCUs: ESP32, STM32, NXP, Nordic (nRF52, nRF5340, nRF54L, nRF91) - Wireless technologies: Wi-Fi, BLE, LoRa - Cellular: 4G / LTE-M / NB-IoT - SIMCOM (SIM800, SIM7000, SIM7600, SIM7020, etc.) - Quectel (BG95, BG96, EC21, EC25, EG25, etc.) - u-blox, Sierra Wireless - QuecOpen development - GNSS integration (u-blox, SIMCOM, Quectel) ⚙️ Peripherals & Systems Interfaces: UART, SPI, I2C, USB, ADC, PWM, CAN, DALI 2 Industrial communication: RS485, Modbus RTU Sensors: Temperature, humidity, pressure, gas (CO, SO2, NO2, O3), dust, pH, EC, light ☁️ IoT & Cloud Integration AWS IoT (MQTTs, HTTPs, provisioning, S3) EMQX, HiveMQ Thingsboard End-to-end IoT system integration 🧠 RTOS / Platforms FreeRTOS Zephyr RTOS Arduino framework 🔊 Other Experience Alexa-enabled devices and audio streaming systems 🛠️ Hardware Design Schematic design: Digital, Analog, Power electronics PCB design: 1–4 layers, 3D layout Tools: KiCad Manufacturing: JLCPCB, PCBWay I would be happy to discuss your project and help you build the best possible solution. Best regards, Thao Nguyen

🔹 Welcome to My Profile! 🔹 Are you seeking a seasoned Embedded Systems Engineer with a track record of successfully bringing startup projects to production? Look no further! With over six years of hands-on experience in the field, I specialize in turning innovative ideas into fully functional embedded solutions. My expertise spans across a wide range of industries, including IoT, automotive, consumer electronics, and more. 🛠️ What I Offer: ✅ Embedded Systems Development: From concept to deployment, I excel in designing and implementing embedded systems tailored to your specific requirements. Whether it's firmware development, hardware integration, or system optimization, I ensure top-notch performance and reliability. ✅ IoT Solutions: Harnessing the power of interconnected devices, I create robust IoT solutions that enable seamless communication and data exchange. From sensor integration to cloud connectivity, I deliver end-to-end solutions that drive business innovation. ✅ Startup Project Expertise: Having spearheaded numerous startup projects, I understand the unique challenges and tight deadlines associated with bringing a product to market. My proven ability to navigate these obstacles ensures timely delivery without compromising quality. ✅ Prototyping and Testing: With a keen eye for detail, I meticulously prototype and test embedded systems to validate functionality and performance. Through rigorous testing methodologies, I identify and address any potential issues before they impact your project. Why you should hire me? ☑️ High-Quality Work ☑️ Cost-Efficient Services ☑️Collaborative, motivated, enthusiastic and dedicated to achieving goals ☑️ Long-term working relationship Expertise - Embedded systems - Hardware Design - Firmware development - Research and development Programming languages and concepts - C/C++ programming - Python programming language - JavaScript Hardware platforms - ESP32/ESP8266 - STM32F4 - Arduino - Raspberry Pi - NVIDIA Jetson nano - nRF52 Softwares and tools - KiCad - EasyEDA - Altium Designer - Arduino IDE - PlatformIO - Eclipse - STM32CubeIDE - TinkerCad - Espressif IDF - nRF Connect SDK Other Skills - UART - I2C - SPI - MQTT - HTTP - I2S - FreeRtos - BLE - TFT Displays - TinyML - Automation I ensure cost-effective designs that works as you want, every time.

Embedded software engineer with 7+ years of experience developing firmware and system software for automotive and IoT devices. I specialize in low-level embedded and application development, device connectivity, and hardware integration. • Embedded firmware development in C/C++ • MCU platforms: STM32, ESP32, Aurix TC39x, NXP S32K • Communication protocols: CAN, UDS, BLE, MQTT, SPI, I2C, UART • AUTOSAR and safety-critical (MISRA C) software • Bootloaders, OTA updates, external flash (QSPI/XIP) • Embedded Linux development (BeagleBone, system monitoring, OTA) • Hardware bring-up, debugging and diagnostics • Python tools for automation, testing, and device communication Experience includes ADAS systems, vehicle teleoperation platforms, IoT controllers, CAN gateways, and custom embedded devices.

Greetings ! I’m a Senior Embedded Linux and Firmware Specialist with over 15 years of experience in developing robust and efficient firmware solutions. My expertise spans across various programming languages including C/C++, C#, Java, and Python. I have a proven track record of delivering high-quality embedded systems and firmware for a wide range of applications Key Skills and Expertise : 1) Embedded Systems Development : ✔MCU Firmwares : STM32 family, PIC18F, Atmega family, 8051 families, MSP430 - Arduino UNO, Arduino Mega2560, ESP32/8266. ✔ Linux-Embedded: Raspberry Pi, Beaglebone, Orange PI, Banana Pi,. ✔SDK Tools: Keil, IAR, Atmel Studio, QT IDE, Arduino, Visual Studio. ✔Communication Protocol: Bluetooth 5, Wifi, Zigbee, Lora Worked with nRF-51DK, core nRF51822, beaconkit, NRF52832 dev-kit. - Adafruit BLE, CC2540/CC2541, CC3200, ESP8266/ESP32 - GSM SIM800 SIM900 GPS MODBUS (TCP/IP) (RTU) ,CANBUS ✔ Build Yockto Linux integrate with Qt5 for Raspberry ✔ Customize the AOSP images 2) IoT Application Development Some of my product that I have designed and released to the market: ✔ Home application: Design Air-condition use Toshiba IC, control motor BLDC, have FPC to 7A, 380V, power supply 1000W, temperature resistor sensor, WIFI and IR to control AC Fan by Triac… ✔ Smart Home Product: Design Home Gateway with Ethernet, WIFI , Zigbee and TFT LCD. Design Smart Switch with capacitive touch, Zigbee communication, Single Phase Power Meter, 220VAC/110VAC load control,... and a lot of other products . 3) Mobile Application development ✔Define an interface where you can send and receive data via Bluetooth, WIFI ✔Make a graph which plot data, design database where store the IoT data ✔Design base on MVVM, MVP, Clean Architecture 4) Build-In Desktop Application ✔ Develop desktop application by WPF, Winform using the MVVM pattern, clean architecture ✔Help you solve any problem in the project. ✔ Build GUI app for Mac, Linux, Win by PySide, Python 5) Web Application Development ✔ Consult that make your business successful with my expertise and knowledge ✔Good at the framework: Spring Boot, .NET core, Django, ReactJS - Configuring and administrating CI (Continuous Integration) & CD (Continuous Delivery) tools/utilities to support in deploying 6) Do data entry, data mining, web scraping, and data extraction ✔ Write a custom script for the website that will extract the required data without relying on any specific software ✔ Make scraping tool that performs web crawling, deliver qualified & well-organized databases as your needs (XLSX, CSV, TXT, IMG, XML, JSON) I am dedicated to delivering top-notch solutions that meet and exceed client expectations. My strong technical skills, combined with my commitment to quality and timely delivery, make me the ideal choice for your embedded systems and firmware development needs. Let’s work together to bring your project to life!

Senior embedded and mobile engineer helping hardware teams turn connected-device prototypes into reliable products. I specialise in Nordic and Zephyr firmware, Bluetooth LE, LTE-M, secure OTA, and companion iOS/macOS apps. I work directly with founders, CTOs, and product teams on new builds, technical audits, difficult integrations, and long-term device support. Selected work: • AirTurn — sole developer of its iOS app and SDK, macOS app, and Zephyr-based firmware platform, supporting a decade of Bluetooth pedals and remotes. • KēZ — firmware, SwiftUI app, and backend integration for an LTE-M vehicle-security product with OTA updates and live diagnostics. • Positive Grid — nRF Connect SDK and Zephyr firmware for production Bluetooth and USB MIDI controllers. • ROUTES — Raspberry Pi, Python, MQTT, and WireGuard control system for a large public-art installation. Typical engagements: • Embedded firmware and connected-product architecture • BLE/LTE-M integration and companion apps • Security, OTA, reliability, and codebase audits • Long-term ownership of deployed devices Most projects begin with a short discovery phase or fixed-scope audit. You receive a clear plan covering risks, priorities, acceptance criteria, and next steps before a larger build. UK-based and working internationally. If you are building a connected product, inheriting an embedded codebase, or need a senior engineer to take ownership of a device already in the field, send me the hardware, current stage, and main technical risk.

I develop Embedded software often related to Networking and WiFi. With experience working on various different technologies , I know how things work across all levels of abstraction. Whenever you need to work on something challenging, you can trust my expertise. Overview: - CEO/CTO of a startup. ( Spectromus Technologies) - Masters degree in IT, Certified Ethical Hacker - C, GoLang applications - from design to implementation. - Linux kernel/driver development - Experience in reverse-engineering and hacking embedded devices Technologies: * eBPF *OpenWrt, QSDK * Linux WLAN device drivers (qca drivers, ath10k,mtk) * OpenWrt Firmware customization on various Access point platforms (IPQ8064, IPQ8074, IPQ4019, MT7688, IPQ6018, etc) *Yocto * Network Intrusion detection/ Prevention System (IDS/IPS) * Golang * Projects worked on: 1. Rate adaptation on Atheros WiFi cards. 2. WiFi Access in Vehicular environments (802.11p, WAVE, DSRC, V2V) 3. WiFi Mesh networks (Qualcomm Wifi SON, Multi AP architecture, EasyMesh) 4. City wide WiFi Network. 5. Captive portals for WiFi networks 6. Cloud platforms - OpenSync , OpenWISP, MQTT based Platform 7. PX4, ArduPilot, OpenDroneID, RemoteID, UAV 8. GNURadio, SDR, HackRF, RTLSDR 8. Open-weight models, LLM

I help startups, product companies, and engineering teams transform ideas into market-ready electronic products. With 10+ years of hands-on experience in embedded systems, electronics design, and industrial automation, I specialize in developing reliable, scalable, and production-ready solutions that work in the real world—not just in the lab. My expertise includes designing high-performance hardware and firmware using ESP32, STM32, Arduino, Raspberry Pi, and other embedded platforms. I have extensive experience building connected products that integrate seamlessly with cloud platforms, mobile applications, industrial equipment, and enterprise systems. Core Technical Expertise • Embedded Firmware Development (C/C++) • ESP32, STM32, Arduino, Raspberry Pi • Custom PCB Design (Altium Designer) • Schematic Capture & Hardware Architecture • Product Prototyping & Manufacturing Support • IoT Solutions (MQTT, Firebase, AWS, Cloud Integration) • UART, I2C, SPI, CAN, Modbus, RS-232, RS-485 • Industrial Automation & Control Systems • Sensor Integration & Data Acquisition • Wireless Technologies (Wi-Fi, Bluetooth, Zigbee, GSM/LTE) • Battery Management & Low-Power Design • Power Electronics & Embedded Power Systems • EMI/EMC-Aware PCB Layout & Design Validation • Hardware Debugging, Testing & Optimization What You Can Expect • Complete Product Development – Hardware, Firmware, and System Integration • Production-Ready Designs – Built with manufacturability, reliability, and scalability in mind • Strong Problem-Solving Skills – Able to diagnose and resolve complex hardware and firmware challenges • Clear Communication – Regular updates, transparent progress tracking, and professional collaboration • Long-Term Reliability – Designs focused on stability, maintainability, and real-world performance If you are looking for an engineer who can understand your requirements, take ownership of the development process, and deliver a professional, production-ready solution, I would be happy to discuss your project.