I’m an embedded Linux developer experienced in building tailored Linux images for embedded, or anywhere a customized Linux OS is needed, I bring 5+ years of seasoned expertise in the realm of Embedded Linux, coupled with a commendable 4+ years of hands-on experience in the field. My skills are : - • Embedded programming in C, C++, Python. • Yocto and Buildroot. • BSP (Qualcomm, NXP, Beagelbone, Raspberry Pi). • Linux kernel and user space drivers, device trees. • Emulation of firmware with Qemu.

✅ Responds within 10 to 15 minutes ✅ Among the Top 3% of Upwork Freelancers with consistent 5-star ratings ✅ 30+ production systems shipped using ESP32, STM32, nRF52, Yocto, Zephyr RTOS, Linux Kernel, including ISO 26262 safety-critical projects 8+ years building production-grade C/C++ firmware for several Embedded Systems, IoT devices, and industrial systems. from first prototype through certification and manufacturing. ── WHO I WORK WITH ── Whether you're a startup bringing a hardware product to market, an OEM needing automotive-grade embedded software, or an IoT company scaling a connected device. I deliver clean, testable firmware that passes certification and works in the field. ── WHAT I DELIVER ── ✅ Rapid prototyping: from concept to working proof-of-concept in weeks, not months ✅ Production firmware for automotive systems: AUTOSAR (Classic & Adaptive), CAN/J1939, LIN, ISO 26262 functional safety ✅ IoT device firmware: ESP32, BLE, WiFi, MQTT, OTA updates, sensor integration, low-power design ✅ HMI/display development: Qt/QML touchscreen interfaces on embedded Linux platforms ✅ RTOS-based systems: Zephyr, FreeRTOS, bare-metal, real-time performance on ARM Cortex-M and embedded Linux ✅ Documentation & standards: SRS, SAD, ICD, MISRA-C, traceability for safety-critical projects ── CORE TECHNICAL STACK ── Languages: C, Embedded C, C++17, Python MCU/Platforms: ESP32, STM32, ARM Cortex-M, Raspberry Pi, Infineon AURIX, Nordic nRF RTOS & OS: Zephyr, FreeRTOS, Embedded Linux, QNX Protocols: CAN, J1939, LIN, UART, SPI, I2C, BLE, WiFi, MQTT Standards: AUTOSAR Classic & Adaptive, ISO 26262, MISRA-C Tools: Git, CMake, STM32CubeIDE, ESP-IDF, PlatformIO, MATLAB/Simulink, Qt/QML ── HOW I WORK ── You'll get regular progress updates, clear documentation, and no surprises. I scope honestly, flag risks early, and deliver tested, production-ready code. I'm available for overlap with US, EU, and MENA teams. ── LET'S TALK ── Send me a message with your project brief and timeline. I'll respond within a few hours with an honest assessment of whether I'm the right fit and if I'm not, I'll tell you that too.

I design and develop production-ready firmware for connected and embedded systems, with a strong focus on reliability, performance, and long-term maintainability. My work spans the full development lifecycle, including system architecture, firmware design and implementation, hardware bring-up, optimization, and deployment support for production environments. I primarily work in C and C++ for ARM Cortex-M, ESP32, and NRF52 platforms. Both bare-metal and RTOS-based approaches are used, especially FreeRTOS, to build deterministic and efficient embedded systems. This includes designing multitasking architectures, handling interrupts, and implementing low-level peripheral control for real-time applications. Strong experience with embedded communication protocols such as SPI, I2C, UART, CAN, BLE, and WiFi, along with development of custom drivers for sensors and external hardware. The focus is on stable integration and efficient operation in resource-constrained embedded environments. On the IoT side, I build firmware for secure and reliable connectivity between devices and cloud platforms. This includes MQTT-based telemetry systems, REST API integration, OTA update support, and low-power optimization techniques such as sleep modes, deep sleep, and duty cycling for battery-powered devices. I also handle hardware bring-up and system-level debugging to support early-stage development and integration between firmware and hardware. Close collaboration with hardware teams ensures smooth integration between PCB design and firmware behavior. In addition, I have experience in embedded AI and edge computing, including deploying TinyML models on microcontrollers. I work with startups, hardware teams, and product companies, helping take embedded products from early prototypes to production deployment, as well as supporting existing systems through debugging, optimization, and firmware evolution.

Full-Cycle Hardware & Embedded Engineer | PCB · Firmware · Linux · IoT | 13 Years I help startups and companies build connected embedded products from prototype to production — combining embedded firmware, hardware integration, IoT connectivity, and system debugging into one streamlined development process. Whether you're building an IoT device, industrial controller, smart monitoring system, or connected consumer product, having one engineer handle firmware, hardware integration, and cloud communication helps reduce development time, simplify debugging, and avoid integration issues. With 13+ years of embedded systems experience and 20+ completed embedded and IoT projects, I develop reliable, production-ready solutions focused on stability, maintainability, and real-world deployment. ━━━━━━━━━━━━━━━ ⚡ WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━ ✅ 13+ years of Embedded Systems & IoT experience ✅ 20+ Embedded and IoT projects completed ✅ Strong expertise in ESP32, STM32, FreeRTOS, and Embedded Linux ✅ End-to-end support: firmware → hardware integration → cloud connectivity ✅ Experience across industrial, renewable energy, medical, and smart devices ✅ Practical engineering approach focused on stable production systems ✅ Clear communication, organized development, and long-term support ━━━━━━━━━━━━━━━ ⚙️ EMBEDDED FIRMWARE — C / C++ ━━━━━━━━━━━━━━━ • Embedded firmware development using C/C++ • ESP32, STM32, nRF52, Raspberry Pi • Bare-metal and FreeRTOS-based systems • Bootloaders, OTA firmware updates, diagnostics, and logging • Peripheral drivers: GPIO, SPI, I2C, UART, CAN, RS485, ADC, PWM • Low-power optimization and real-time applications ━━━━━━━━━━━━━━━ 🌐 IoT & CLOUD CONNECTIVITY ━━━━━━━━━━━━━━━ • AWS IoT Core, MQTT, REST APIs • WiFi, BLE, Cellular, and IoT device connectivity • Secure cloud communication and remote monitoring • ESP-IDF, Arduino Framework, PlatformIO • Device telemetry, remote updates, and backend integration ━━━━━━━━━━━━━━━ 🐧 EMBEDDED LINUX ━━━━━━━━━━━━━━━ • Raspberry Pi and Linux-based embedded systems • Embedded Linux application development • System integration and device communication • Python scripting and automation tools ━━━━━━━━━━━━━━━ 🔧 HARDWARE INTEGRATION & PROTOTYPING ━━━━━━━━━━━━━━━ • Sensor and actuator integration • Hardware bring-up and debugging • Prototype development and testing • UART, SPI, I2C, CAN, RS485 communication systems • Basic PCB review and hardware troubleshooting support ━━━━━━━━━━━━━━━ 🏭 INDUSTRIES ━━━━━━━━━━━━━━━ ✔ Industrial Automation ✔ Renewable Energy Systems ✔ IoT & Connected Devices ✔ Medical & Smart Devices ✔ Monitoring & Control Systems ✔ Embedded Linux Products ━━━━━━━━━━━━━━━ 📦 WHAT YOU RECEIVE ━━━━━━━━━━━━━━━ • Production-ready firmware • Clean and maintainable source code • Debugging and testing support • Documentation and integration guidance • Long-term support for scaling and improvements ━━━━━━━━━━━━━━━ 📩 LET'S WORK TOGETHER ━━━━━━━━━━━━━━━ I work best with startups, founders, and engineering teams building embedded and IoT products where reliability and long-term maintainability matter. If you need help with firmware development, IoT integration, embedded Linux, debugging, or complete embedded product development — feel free to send a message with your project details. ━━━━━━━━━━━━━━━ 🔑 KEYWORDS ━━━━━━━━━━━━━━━ Embedded Systems, Firmware Development, Embedded C, C++, ESP32, STM32, nRF52, Raspberry Pi, FreeRTOS, Embedded Linux, IoT, AWS IoT Core, MQTT, REST API, Driver Development, Hardware Integration, Wireless Communication, BLE, WiFi, Cellular, UART, SPI, I2C, CAN, RS485, ESP-IDF, Arduino, PlatformIO, Python, Product Development

🔌⚙️ Let’s Make Your Devices Talk: BLE, Zigbee, WiFi, LoRaWAN, and More! 📡💡 If your device needs to transmit data, talk to the cloud, or mesh with others, I’m the embedded firmware developer who speaks its language in C, C++, and wireless protocols. I have 20+ years of relevant experience in the field and ready to showcase it to you! I help you build connected, low-power, production-grade embedded systems that actually work in the real world from BLE wearables to LoRaWAN sensors in the middle of nowhere. 🌐 Wireless & IoT Protocols I Specialize In ◆Bluetooth Low Energy (BLE): custom GATT services, ultra-low-power modes, secure pairing for wearables and beacons ◆Zigbee & Z-Wave: smart home integration, mesh networking, lighting control systems ◆Wi-Fi (ESP32/ESP8266): cloud API integration, MQTT, HTTP/HTTPS communication ◆LoRa & LoRaWAN: long range, low power networks for industrial IoT, smart cities, and agriculture 🔩 Microcontroller & Embedded Platform Expertise ◆STM32, nRF52, ESP32, SAMD, AVR, PIC, ARM Cortex-M, Raspberry Pi, Arduino Pro series ◆RTOS Development: FreeRTOS, Zephyr, Mbed OS, bare-metal firmware design ◆Peripheral & Sensor Integration: I2C, SPI, UART, PWM, ADC, GPIO, DMA, sensor drivers ◆Low Power Design: battery optimization, sleep modes, energy harvesting ◆Secure Firmware: OTA updates, secure bootloaders, encryption for IoT devices 🛠 Embedded Development Tools & Workflow ◆Embedded C/C++, PlatformIO, STM32CubeIDE, SEGGER Embedded Studio ◆Debugging with logic analyzers, oscilloscopes, JTAG/SWD ◆Git based version control, VS Code, and CI/CD pipelines for embedded systems Whether you’re creating a smart IoT device, a remote sensor system, or a custom wireless solution, I’ll make sure your firmware is efficient, scalable, and bulletproof. 📲 Let’s turn bits and bytes into real-world wireless magic. 💬 Message me to get started!

Top Rated Freelancer | 95% Job Success | 6+ Years of Experience | 50+ Projects Delivered I help startups, product companies, and businesses transform innovative ideas into reliable, production-ready embedded products. From custom PCB design and embedded firmware to AI-powered devices and IoT solutions, I provide end to end engineering support throughout the complete product development lifecycle. Whether you're building an MVP, improving an existing product, or preparing for manufacturing, my focus is on delivering practical, scalable, and high quality engineering solutions. Over the past 6+ years, I've successfully delivered 50+ projects for clients across industrial automation, medical electronics, automotive systems, IoT, AI powered embedded devices, and secure software applications. My approach combines hardware, firmware, AI, and system architecture to build complete solutions, not just individual components. Core Expertise: Embedded Systems Embedded Firmware Development ESP32, STM32, nRF52, AVR & PIC Raspberry Pi Development Hardware Bring-up, Debugging & Testing PCB Design Custom PCB Design Schematic Capture PCB Layout Altium Designer KiCad Manufacturing-Ready PCB Design AI & Computer Vision Edge AI Integration OpenCV YOLO TensorFlow Lite AI-Powered Embedded Applications IoT & Connectivity Wi-Fi BLE LoRa LTE MQTT Sensor Integration Advanced Engineering System Architecture Runtime Validation Secure Software Design Application Integrity Product Optimization Technologies Programming: C, C++, Python Microcontrollers: ESP32, STM32, nRF52, AVR, PIC, Raspberry Pi PCB Design: Altium Designer, KiCad Communication: UART, SPI, I²C, CAN, BLE, Wi-Fi, LoRa, LTE, MQTT AI & Computer Vision: OpenCV, YOLO, TensorFlow Lite What You Can Expect: Endto end product development, from concept to production Reliable, manufacturing ready PCB designs Clean, scalable, and maintainable firmware Strong analytical thinking and practical problem solving Clear communication and transparent project updates Long term engineering support For projects requiring backend development, cloud integration, DevOps, mobile applications, or web dashboards, I collaborate with experienced specialists to deliver complete end to end solutions while remaining your primary engineering point of contact. I believe successful products are built through thoughtful engineering, attention to detail, and close collaboration with clients. My goal is not just to complete a project, but to deliver a solution that is reliable, manufacturable, and built to perform in real world environments. If you're looking for an engineer who can design hardware, develop firmware, integrate AI, and build complete embedded products, I'd be happy to discuss your project and help bring your idea to life.

I develop complete embedded systems, including firmware, PCB design, IoT solutions, desktop software, and mobile applications. Whether you need a prototype, MVP, or production-ready product, I can support the entire development process from concept to deployment. I maintain an in-house inventory of microcontrollers, sensors, and development hardware, along with a dedicated testing lab. This allows me to start development immediately without delays caused by sourcing components. Microcontrollers & Embedded Platforms ESP32 (All Series), ESP8266, STM32, Raspberry Pi, AVR, PIC, Nordic nRF52, Arduino Communication Protocols BLE, Wi-Fi, Bluetooth, MQTT, NFC, LoRa, RF, RS485, UART, SPI, I2C, CAN, Modbus IoT & Cloud Platforms AWS IoT Core, Azure IoT Hub, Google Cloud, Firebase, DigitalOcean PCB Design & Hardware Development Schematic Design, PCB Layout, Circuit Design, Sensor Integration, Hardware Debugging Development Tools ESP-IDF, ESP-ADF, Arduino IDE, PlatformIO, STM32CubeIDE, SEGGER Embedded Studio, KiCad, EasyEDA, Eagle Additional Expertise Wireless Medical Devices, Healthcare IoT, Wearables, BLE Medical Sensors, Patient Monitoring Systems, React Native Mobile Apps If you're unsure which components or architecture are best for your project, I can help you select the right hardware and software before development begins. Most of my Upwork projects are covered by NDAs, so many of the products I have developed cannot be shared publicly. However, I am happy to discuss my experience, development approach, and how I can help bring your idea to life.

more10 years of expertise in embedded systems and IoT. My skills encompass both software and hardware aspects of embedded systems, including: Raspberry Pi, ESP32,Yun, among others. In terms of hardware, - I have knowledge and experience in PCB prototyping and production. This includes designing and manufacturing . - I have a strong understanding of digital transformation and how it applies to various industries. On the software side, - I have proficiency in developing mobile applications for both iOS and Android via React native or thunkable. - I have a diverse range of programming skills, including Node.js, PHP, HTML, CSS, C++, nodejs, Bash. - mange servers and networks, ensuring the smooth operation and connectivity of various systems. I am eager to take on creative challenges that allow me to showcase my expertise while making a meaningful impact.

⭐ I am an Embedded Systems Engineer with 5+ years of experience designing embedded hardware, production-ready PCBs, firmware, and IoT devices for industrial, wireless, sensor, and battery-powered applications. I support projects from system architecture and component selection through schematic design, PCB layout, firmware development, prototyping, testing, and manufacturing handoff. ➤ 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 ✔ Embedded systems architecture ✔ PCB design and electronic hardware development ✔ Embedded firmware in C and C++ ✔ IoT and wireless device development ✔ Low-power and battery-powered systems ✔ Industrial controllers and sensor nodes ✔ Hardware debugging, testing, and optimisation ➤ 𝗣𝗖𝗕 & 𝗛𝗔𝗥𝗗𝗪𝗔𝗥𝗘 𝗗𝗘𝗦𝗜𝗚𝗡 ✔ Schematic capture and circuit design ✔ Single-layer, double-layer, and multilayer PCB layout ✔ Analog, digital, mixed-signal, RF, and power electronics ✔ Component selection and BOM optimisation ✔ Signal integrity, grounding, thermal, and EMI/EMC considerations ✔ DFM, DFA, and DFT review ✔ Gerber, BOM, CPL, fabrication, and assembly files ➤ 𝗘𝗠𝗕𝗘𝗗𝗗𝗘𝗗 𝗙𝗜𝗥𝗠𝗪𝗔𝗥𝗘 ✔ ESP32, STM32, Nordic nRF52 and nRF53 ✔ Embedded C and C++ ✔ FreeRTOS and Zephyr ✔ UART, SPI, I²C, CAN, RS-485, USB, and Modbus ✔ Sensor, display, motor, and communication integration ✔ Low-power modes, debugging, and hardware bring-up ✔ Real-time control and data-acquisition systems ➤ 𝗜𝗢𝗧 & 𝗪𝗜𝗥𝗘𝗟𝗘𝗦𝗦 ✔ Bluetooth Low Energy and Wi-Fi ✔ LoRa and LoRaWAN ✔ LTE-M and cellular IoT ✔ MQTT, HTTP, and HTTPS ✔ Remote monitoring and wireless sensor systems ✔ IoT gateways and connected industrial devices ➤ 𝗧𝗢𝗢𝗟𝗦 ✔ Altium Designer ✔ KiCad ✔ EasyEDA ✔ STM32CubeIDE ✔ ESP-IDF ✔ nRF Connect SDK ✔ PlatformIO ➤ 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗬 / 𝗗𝗢𝗠𝗔𝗜𝗡 ✔ IoT & Smart Devices ✔ Wearables Devices ✔ Industrial Automation ✔ RF & Wireless Systems ✔ Embedded Control Systems ✔ Sensor & Monitoring Systems ➤ 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗥𝗘𝗖𝗘𝗜𝗩𝗘 ✔ Complete hardware and firmware source files ✔ Organised schematics and PCB layouts ✔ Manufacturing-ready PCB documentation ✔ Clear technical documentation ✔ Prototype testing and debugging support ✔ Support from concept through production handoff ⭐ Share your requirements, block diagram, schematic, PCB files, firmware, or prototype details. I will review the project, identify the main technical risks, and recommend a practical development approach. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Embedded Systems, PCB Design, Firmware Development, Embedded Firmware, Hardware Design, Circuit Design, ESP32, STM32, Nordic nRF52, Altium Designer, KiCad, EasyEDA, Embedded C, C++, FreeRTOS, Zephyr, IoT Hardware, BLE, Wi-Fi, LoRaWAN, LTE-M, MQTT, Power Electronics, Multilayer PCB, Signal Integrity, DFM, Industrial Automation, Sensor Systems, Hardware Prototyping 𝗛𝗮𝘀𝗵𝘁𝗮𝗴𝘀 #EmbeddedSystems #PCBDesign #FirmwareDevelopment #EmbeddedFirmware #HardwareDesign #ESP32 #STM32 #NordicnRF #AltiumDesigner #KiCad #IoTHardware #PowerElectronics #IndustrialAutomation #EmbeddedC #ProductDevelopment

Thank you for visiting my page. I'm Hoang ( you can call me Vincent) I have more than 5 years of experience with embedded systems. My current areas of expertise are Embedded Systems Design, including embedded hardware/software. I have experience working at major corporations such as Samsung and LG Electronics. ___________________________________________ What I can do for you : ELECTRONICS HARDWARE DESIGN: + SCH: Analog, Digital, RF (WiFI, 3G/LTE, GPS, etc.), Power electronics; + PCB Layout: 1 - 12 layers, High Density possible. + Electrical CAD: Altium Designer, Kicad. FIRMWARE: + MCU firmware in C/C++, MicroPython, PIC,NXP,ESP32, STM8, STM32, Arduino,.. + Bluetooth, BLE, ZigBee, UWB, RF design with custom frequencies possible +Strong knowledge of standards: I2C, SPI, UART, CANBUS, MODBUS, ETH, USB,...