Hire the Best ESP8266 Specialists

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.

I am a professional Embedded Engineer with over 10 years of experience in embedded systems design, covering both hardware and firmware/software development. I have also set up and led a full-service engineering team, delivering complete products from concept to production, including hardware design, embedded software, cloud integration, and, AI, mobile app development, product/industrial design. I specialize in wireless IoT devices, wearable/medical technology, and embedded firmware with a strong background in end-to-end product development and team leadership. What We Can Offer Firmware Development - Embedded software for IoT, wearables, medical, and consumer electronics - Driver development, RTOS integration, and low-power optimization - Connectivity stacks: BLE, Wi-Fi, NFC, LoRa, LTE, CAT-M1, NB-IoT - Secure OTA updates, device provisioning, and cloud integration Hardware Design - Custom PCB design with multiple layer and layout for high-reliability embedded systems - Power management & battery systems (BMS, energy optimization) - Prototyping, testing, and design-for-manufacturing (DFM) Product & Industrial Design - Mechanical design, 3D modeling, and enclosure development - Ergonomics and usability design for consumer and medical devices - Design-for-production (DFP) and certification support (CE, FCC, FDA-ready) AI & Data Processing - Edge AI/ML model deployment (Edge Impulse, TensorFlow Lite) - Predictive maintenance and anomaly detection for IoT/IIoT - Cloud-based AI integration with AWS/Azure/Google Cloud Mobile App & Cloud Integration - Cross-platform mobile apps (Android/iOS) - Secure Bluetooth, Wi-Fi, and cloud connectivity with devices - Web portal/dashboard development for monitoring and analytics

Top 5% Talent on Upwork | Embedded & Hardware Engineer | 100% Job Success | 10+ Projects Delivered | 5+ Years of Experience Are you looking for an experienced Embedded Systems & Hardware Engineer who can transform your idea into a fully working smart device? You’re in the right place. I specialize in designing and developing complete IoT products — from schematic + PCB design, to firmware programming, to wireless communication integration, testing, debugging, and final prototype support. Whether you're building a: ✔ Smart Home Device ✔ Wearable Product ✔ Industrial Sensor Node ✔ BLE Tracker ✔ WiFi Enabled Controller ✔ Battery Powered Embedded System ✔ Custom Wireless PCB Product ◆ Core Expertise ▸ Embedded Systems & Electronics ✓ Microcontrollers: STM32, ESP32/ESP8266, nRF52 ✓ Ultra-Low Power Design: sub-µA standby, long-life battery systems ✓ PCB Design: multi-layer, high-density, signal integrity optimized ✓ Embedded Firmware: UART, SPI, I2C, real-time systems ✓ Wireless: BLE, WiFi, LoRa, MQTT ✓ Motor Control: PID, stepper/servo systems ▸ System Development ✓ Hardware + Firmware integration ✓ Debugging & production validation ✓ Power profiling & optimization ✓ OTA, bootloaders, custom protocols ◆ Tools & Technologies ▸ Firmware: C, C++, Python, FreeRTOS ▸ Hardware: KiCad, Altium, JTAG, Oscilloscope ▸ Communication: UART, SPI, I2C, RS485, Modbus ▸ IoT: BLE, WiFi, LoRa, MQTT ◆ Why Work With Me ✓ Ultra-low power specialist (battery-operated systems) ✓ Full-stack embedded (hardware + firmware) ✓ Production-ready design focus ✓ Clear communication & reliable delivery ✓ Post-project support I can help you engineer it professionally, efficiently, and production-ready. I can help connect your hardware seamlessly to mobile apps, gateways, or cloud platforms.

Hi, I'm David. I help turn complex electronic concepts into dependable, production-ready products. With over 5 years of practical experience, I support clients through the full development cycle, from initial design to functional prototypes and manufacturing handoff. My focus is on building efficient, scalable, and cost-conscious hardware systems that perform reliably in real-world conditions. 1. What I Deliver: Embedded Systems & Hardware Development - PCB Design & Hardware Engineering: Circuit design, multi-layer PCB layout, component selection, impedance tuning, compact design, and cost optimization. Emphasis on IPC standards, signal integrity, EMI/EMC mitigation, and thermal considerations. - High-Speed & Complex Systems: Hands-on work with DDR, HDMI, MIPI (CSI/DSI), PCIe Gen1/2, along with SoC and FPGA-based prototyping. - Embedded Platforms: STM32N6, STM32H7/STM32H5, STM32F7/STM32F1/F3/F4, ESP32/ESP8266, Nordic nRF52 series, ARM Cortex-A systems, Raspberry Pi (CM4/CM5), Zynq-7000. - Power & Mixed-Signal Design: Switching regulators (Buck, Boost, Flyback), LDOs, battery systems, motor control (BLDC, stepper, servo, DC), and analog/digital integration, PoE, LLC. - Manufacturing Readiness: BOM preparation, Gerber generation, and design adjustments to streamline production and reduce costs. - Tools: Altium Designer, KiCad, LTspice, Proteus, MATLAB/Simulink . 2. Firmware & Software Development - Programming: C, C++, Embedded C, Python (for automation and validation). - System Development: Linux-based platforms, MCU firmware, RTOS (FreeRTOS), power optimization, bootloaders, OTA updates, and debugging. - Connectivity & IoT: WiFi, BLE, LoRa, Zigbee, GSM/LTE/NB-IoT/5G, GPS, RFID, NFC. - Communication Interfaces: UART, I2C, SPI, I2S, RS232, RS485, CAN, Modbus RTU/TCP, USB, Ethernet. - User Interface: LVGL-driven GUIs, TFT/OLED displays, and touch interfaces. 3. Development Process & Collaboration - Product Lifecycle Support: Concept → prototyping → validation → production handover. - Workflow & Management: Organized development using Git, Jira, and structured documentation with clear milestones. - Global Collaboration: Experience working across US, EU, and Asia time zones with consistent communication. - Troubleshooting: Strong capability in diagnosing and resolving both hardware and firmware issues. 4. Why Choose Me? - Unified Skillset: Combined hardware and firmware capabilities help minimize back-and-forth and speed up delivery. - Practical Engineering Approach: Designs are built with real-world constraints in mind — not just theory. - Efficiency-Oriented: Focus on reducing unnecessary costs while maintaining performance and reliability. - Clear & Responsive Communication: Regular updates, well-documented progress, and quick feedback. Looking to bring your idea into a functional, well-engineered product? Feel free to reach out. I’d be glad to discuss your project !!!

I'm a Software and Hardware Application developer with extensive experience in building and maintaining high quality applications. My experiences range from building extensive mobile (both android and ios) applications to building scalable websites for multiple service industries. Having an experience of more than 6 years, I like working on projects with a team that cares about creating modern, creative and usable interfaces. Having an electrical engineering academic background, I have also the skill set and experience of working on engineering related work like designing electronic circuits, programming iot boards, designing pcbs and providing customized engineering solutions. It's important to me to build long term relationships with clients, so I'm primarily looking for long term projects. I'm flexible with my working hours and am happy to work closely with any existing freelancers you work with. I look forward to hearing from you!

Hi! This is Efrain Manuel L. I have been working as a Professional PCB Designer and an Embedded System Expert for more than 6 years. I have been working in the field of Designing & Implementing : ☑️ Circuit, PCBs for both Commercial and Industrial purposes. ☑️ Microcontroller Based Projects. ☑️ IOT-based automation Projects. ☑️ Projects Related to Robotics. ⚡I have graduated in Electrical & Electronic Engineering (EEE). ⚡I have been collaborating on high-complexity long-term projects with various clients worldwide. ☑️ Through this profile, I Provide the Following Services: ✔ Schematic Design ✔ PCB Design (1/2/4/6/8 Layers) ✔ Gerber Export ✔ BOM Validation & Sourcing ✔ 3D CAD Design of PCB (.obj /.step) ✔ Reverse Engineering (PCB to New Schematic) ✔ Custom Symbol & Footprint from Datasheet ✔ Microcontroller Based PCB Design ✔ Writing code for the specific microcontrollers ☑️ I have implemented lots of microcontroller-based projects using Arduino, ATMEGA Series, STM32, NODEMCU, ESP8266, and ESP32 series. Why You Should Hire Me: ☑️ On-time delivery with the Best quality for every project at a reasonable rate ($). ☑️ Assist With PCB Fabrication. ☑️ 100% Guarantee on Customer Satisfaction. ☑️ 24/7 Support After Project Completion (Free of Charge) So, what are you waiting for? If you have any Ideas and PCB Design related projects or any Microcontroller based projects give me a knock as soon as possible. I assure you.