Hire the Best ESP32 Freelancers
in Bangladesh

I'm a Computer Science and Engineering student at the Rajshahi University of Engineering & Technology (RUET). Furthermore, I am a competitive programmer and a freelancer. Working with Arduino and embedded systems is something I'm passionate about. A mechanical ventilator project launched my career in this industry. After that, I worked on several Arduino, ESP8266, and ESP32 projects. I've worked with Arduino-based systems for two years. I have completed several mega projects, including an automatic Ambu bag-based medical ventilator, bee-hive monitoring, and controlling system, a CPAP-BiPAP ventilator, an environmental pollution monitoring system, an IoT-based soil moisture monitoring and controlling system, and an IoT-based dog tracking system, to name a few. Apart from that, I can create Android and Web applications. I've previously worked on Android apps like Bluetooth-based ventilator monitoring and control, BLE-based distance measurement systems, WiFi-based home automation apps, and web apps like IoT-based dog tracker projects. I've worked with Android apps using Java and Flutter before. I'm currently working on machine learning with TensorFlow.

🎯 With 8+ years of experience in developing IoT and embedded systems using ESP32, ESP8266, Raspberry Pi (2/3/4/5/Pico/Pico W), Arduino, STM32, etc. | HTTP, MQTT, CoAP | AWS IoT Core, Thingsboard, Node-Red, Home Assistant, Tasmota, Blynk, etc., along with custom dashboard integration with firmware. Python, uPython, C/C++, & javascript, I help clients build smart, connected, and scalable solutions. Project and Product development tailored to their real-world needs. 🚀 Bringing Smart Ideas to Life – Reliable, Scalable, and Cost-Effective IoT Solutions Are you seeking a skilled engineer to bring your IoT idea to life as a functional, connected product? I’m a results-driven IoT & Embedded Systems Engineer with a strong foundation in microcontroller & micro-processor programming, Bearmetal driver development, sensor integration, wireless communication, and cloud connectivity. I specialize in building high-performance IoT systems with smooth communication protocols and long-term reliability. ✅ What I Can Do For You: 🔌 Custom IoT/ Firmware development using Arduino, ESP32, Raspberry Pi, and STM32 🛠️ Custom Product Development: I have the whole solution from scratch to product deployment. 📡 Wireless protocols: MQTT, HTTP/HTTPS, WebSocket, BLE, Esp-Now, LoRa, Zigbee, etc. ⚙️ Device protocols: UART, SPI, I2C, I2S, Modbus, CANbus, Baremetal driver development, etc. 🌐 Dashboard Integration: ThingsBoard, Blynk, Firebase, Node-RED, Home Assistant, Tasmota, ESP Rainmaker, etc. 🔧 Embedded Sensor/Actuator interfacing for automation & control 🔁 OTA firmware updates, watchdog timers, and power-saving modes 🧰 Troubleshooting, optimization, and clean modular/OOP-based C/C++, Python firmware. 🛠️ Tools, Technologies & Expertise 📟 Microcontrollers & Boards ESP32, ESP8266 (NodeMCU, WROOM, WROVER) Arduino (Nano, Uno, Mega, Pro Mini, MKR1000) Raspberry Pi (2, 3, 4, 5, Pico, Pico W, Compute Modules) STM32 (Bluepill, STM32F103, STM32CubeMX/HAL) BeagleBone Black, Orange Pi, Banana Pi ATmega328P, ATTiny85, NRF52, RP2040, CH32V, PIC 💻 Programming Languages C, C++, Embedded C (bare-metal, HAL/LL) MicroPython, Python (asyncio, machine) JavaScript (Node.js for IoT, WebSocket) Shell scripting (Bash) for Linux automation JSON, YAML, INI (config formats for IoT) 📡 Communication Protocols # MQTT (public & secured brokers) # HTTP, HTTPS, WebSocket, CoAP # ESP-NOW, BLE, LoRa (RA-02, RYLR), Zigbee (CC2530, ZBBridge) # GSM/GPRS, SIM800L, NB-IoT (BG95, SIM7020), Wi-Fi # RS-232, RS-485, CANbus, Modbus RTU/TCP 🔌 Device/Peripheral Protocols # UART, SPI, I2C, I2S, OneWire, PWM, ADC, DAC # SD Card (FATFS), EEPROM/Flash handling # GPIO interrupt handling, timer/counter config # Bare-metal driver development and peripheral abstraction 🧰 Development Tools & IDEs # Arduino IDE, PlatformIO, STM32CubeIDE, ESP-IDF, VS Code, Thonny, Geany, etc. # Linux (Ubuntu/Raspberry Pi OS/Debian) CLI Tools # Git, GitHub/GitLab, Version Control for Embedded # Serial Monitors (PuTTY, TeraTerm, minicom), Logic Analyzers (Sigrok) ☁️ Cloud Platforms & Integrations # AWS IoT Core (MQTT, Shadow, Rules Engine) # ThingsBoard (CE/PE), Blynk (legacy and new), Firebase Realtime/Firestore # Node-RED (on-prem or cloud), Home Assistant (ESPHome, MQTT) # Tasmota customization (Rules, MQTT, Templates) # ESP RainMaker, Google Firebase, Azure IoT Hub 📊 Dashboards & Custom UIs # Web dashboards with HTML/CSS/JS # REST API consumption and creation. # Local dashboards using Node-RED, Grafana, InfluxDB, etc. 🔐 Security & Optimization #TLS/SSL for MQTT & HTTP # Data encryption (AES, base64, JWTs) # Memory and power optimization for low-power devices (deep sleep, watchdogs) # Fail-safe firmware design with bootloader, rollback 📦 Product Development & Hardware Integration # PCB interfacing and prototyping (breadboard to custom PCB) # Sensor calibration (temperature, humidity, motion, distance, gas, etc.) # Relay, triac, motor, servo, LED matrix, and display (OLED, LCD I2C, TFT) # Custom device firmware from scratch to OTA-ready product 🌟 Why Choose Me: 🧠 Expertise You Can Trust – Solid engineering principles and deep technical know-how 📈 Results-Driven Development – Focused on delivering working, scalable solutions ⏱️ Timely Delivery – Respect for your deadlines and project milestones 📣 Clear & Professional Communication – Regular updates, detailed reports, and zero guesswork 🔁 Post-Delivery Support – Guidance, maintenance, and iteration support available 💯 Client Satisfaction is My Top Priority 💼 Availability: 📅 Available for full-time, part-time, and long-term projects 🌍 Comfortable with clients worldwide and flexible with time zones 🤝 Long-term support, NDA-friendly, and confidential work welcomed 🚀 Let’s build something smart together – Message me today! SHAMIM HASAN Embedded Software Engineer

I'm immersed in the world of embedded systems, particularly in the realm of IoT-based digital device development. Over the past 4 years, I've been diving deep into the intricacies of designing and implementing these devices. My focus extends to areas like PCB design using (Altium ,kicad,Esay EDA), 3D modeling for physical components using (Solidworks), firmware development using (Keil uvision,Cube ide, Cube MX, and Arduino), and even delving into the realm of PLCs. It's an exciting journey, exploring the convergence of technology and creativity in this ever-evolving landscape.

Goal-driven hard worker, responsible and 3 years+ experience in PCB design, analog and mixed signal design, High-speed design. Skilled in the Internet of Things (IoT), hardware concept prototyping, embedded systems, and robotics.

I am an Embedded Systems, IoT, FPGA, and AI Engineer with experience designing production-ready embedded solutions, industrial automation systems, real-time firmware, and cloud-connected IoT platforms. I help startups, research teams, and businesses transform concepts into reliable embedded products—from prototype development to deployment. My expertise spans embedded firmware, STM32, Arduino, ESP32, Raspberry Pi, FPGA development, Embedded Linux, real-time systems, industrial communication protocols, edge AI, and cloud-integrated IoT solutions. I have successfully developed embedded applications involving: • Embedded C/C++ Firmware Development • Arduino, STM32, ESP32 & ARM Cortex-M Programming • Embedded Linux & Linux Device Development • FPGA Development using Xilinx Vivado & Vitis HLS • Real-Time Embedded Systems • LinuxCNC Motion Control • EtherCAT Industrial Automation • Industrial IoT (IIoT) • Internet of Medical Things (IoMT) • Cloud-connected IoT Platforms • Edge AI & Machine Learning Deployment • Sensor Networks & Data Acquisition • Robotics & Motion Control Systems Whether you need a prototype, firmware optimization, industrial automation, FPGA acceleration, or a complete IoT ecosystem, I deliver clean, maintainable, and scalable solutions. ⸻ What I Can Do Embedded Systems ✔ Embedded C/C++ Development ✔ Firmware Development ✔ Bootloader Development ✔ Bare-Metal Programming ✔ Embedded Linux ✔ FreeRTOS ✔ Driver Development ✔ Hardware Bring-up ⸻ Microcontrollers ✔ Arduino ✔ STM32 ✔ ESP32 ✔ Raspberry Pi ✔ ARM Cortex-M ✔ AVR ⸻ FPGA & High-Performance Computing ✔ Xilinx Vivado ✔ Vitis HLS ✔ Zynq UltraScale+ ✔ Kria KR260 ✔ AXI-Based IP Development ✔ FPGA Acceleration ✔ LinuxCNC Integration ✔ Real-Time Motion Control ✔ EtherCAT ✔ Hardware/Software Co-Design ⸻ Internet of Things ✔ Complete IoT Product Development ✔ Industrial IoT (IIoT) ✔ Internet of Medical Things (IoMT) ✔ MQTT ✔ TCP/IP ✔ HTTP/HTTPS ✔ Wi-Fi ✔ BLE ✔ GSM ✔ Ethernet ✔ Remote Monitoring ✔ OTA Firmware Updates ✔ Sensor Integration ✔ Cloud Dashboards ⸻ Cloud Platforms ✔ AWS IoT Core ✔ Azure IoT Hub ✔ Google Cloud Pub/Sub ✔ ThingsBoard ✔ ThingSpeak ✔ Adafruit IO ⸻ Artificial Intelligence ✔ Edge AI ✔ TinyML ✔ Machine Learning Integration ✔ Computer Vision ✔ Sensor Data Analytics ⸻ Programming Languages • C • C++ • Python • MATLAB • SQL • PHP • HTML • CSS ⸻ Communication Interfaces • UART • SPI • I²C • CAN • USB • Ethernet • BLE • Wi-Fi • GSM • MQTT • HTTP • TCP/IP ⸻ Development Tools • STM32CubeIDE • PlatformIO • Arduino IDE • Vivado • Vitis • MATLAB • Git • VS Code • Android Studio • Anaconda ⸻ Operating Systems • Linux • Embedded Linux • Windows • FreeRTOS ⸻ Why Clients Hire Me ✅ Production-quality embedded software ✅ Strong debugging and troubleshooting skills ✅ Clean, modular, and well-documented code ✅ Reliable communication throughout the project ✅ On-time delivery with long-term support ✅ Experience bridging research prototypes into deployable products

Experienced Embedded Systems & IoT Engineer Hi there! I’m a passionate Embedded Systems and IoT Developer with over 4 years of experience bringing hardware ideas to life. I specialize in building end-to-end solutions using micro controllers like Arduino, ESP32, and ESP8266 and I’m deeply involved in everything from firmware development to custom PCB design. I’ve spent years working with a wide range of technologies to create seamless user experiences: Interfaces & Displays: Designing intuitive controls using OLED, TFT, Nextion, and Matrix displays. Connectivity: Integrating GSM, GPS, Wi-Fi, and Bluetooth for smart, connected devices. Cloud & Backend: Building real-time monitoring systems using Firebase, MQTT, Blynk, and MySQL/PHP. Prototyping: Utilizing Wokwi and Tinkercad to ensure designs are flawless before they hit the bench. What I bring to your project: I don’t just provide code; I deliver a complete, functional package. You’ll receive clean C/C++ or .ino source code, detailed circuit diagrams, and simulation files where applicable. Most importantly, I provide the expert advice needed to ensure your project is reliable and scalable. I’m a firm believer in "measure twice, cut once," so please feel free to contact with me. I’d love to discuss your vision for free and make sure we’re the perfect fit for a successful collaboration! Looking forward to building something amazing with you.