I am a professional embedded software engineer with more than ten years of experience. My current areas of expertise are IoT Applications & Embedded Systems Design, including embedded hardware/software. - Connectivity Domain Ethernet 802.3, WLAN (Wireless 802.11), Bluetooth Low Energy protocol stack, and low layer I2C, SPI, UART, RS485, etc. technologies. - Good exposure and worked with various protocols likes I2C, SPI, UART, CAN. - Proficient with ESP32, Raspberry Pi, Atmel, ARM, PIC32, Renesas boards, and communication with various sensors. - Experienced in Android framework & HAL layer exploration, development, Customization and bug fixing on Qualcomm development boards. - Have experience using debugging tools such as Segger Jlink, CAN bus analyzer (CL3000), Logic analyzer. - IoT devices with wireless connectivity such as LTE, CAT-M1, NB-IoT, LoRa/LoRaWAN, BLE, WIFI, ZigBee, NFC - Experienced in AWS Service, AWS IoT. 🔑𝐊𝐄𝐘𝐖𝐎𝐑𝐃𝐒: Embedded Design, Hardware Design, Firmware Development, Mobile App Integration, IoT Device, Medical Device Design, Embedded Systems, Real-time Operating Systems (RTOS), Microcontroller Programming, Sensor Integration, Wireless Communication (Bluetooth, Wi-Fi), Low Power Design, Wearable Devices, Firmware Architecture, Embedded Software, Device Drivers, System-on-Chip (SoC), PCB Design, Signal Processing, IoT Platforms, Cloud Integration, Mobile App Development, Web Portal Design, Healthcare Technology, Remote Monitoring, Data Security, Telemetry, ARM Cortex, ESP32, Device Connectivity, Embedded Prototyping, Human-Machine Interface (HMI), Medical Device Compliance, Mobile-Connected Devices, IoT Security, BLE, Firmware Debugging, Connectivity Solutions, Edge Computing, Smart Devices, Industrial IoT.

✅TOP RATED PLUS Firmware and Hardware Developer ✅ 100% Job Success Rate ✅12+ years of experience in PCB Design - 1000+ PCB developed ✅8+ years of experience in Hardware Development - 45+ Products Developed ✅6+ years of experience in Firmware Development - 400+ codes developed and modified ✅Power Electronics, High-Speed Signals, FPGA, EMI/EMC ,UL Compliance Hi, I'm Neel Shah, an architect of innovative technology products with expertise in IOT and embedded systems. With over 11 years of experience as an Electronics Engineer, I specialize in PCB design, Hardware and Firmware development. Throughout my career, I have successfully designed over 1000 PCBs and developed 400+ firmware codes for a wide range of products, including smart home automation, consumer electronics, Space applications, EVs, and so on! Please review my portfolio, which showcases my past projects, achievements, and a satisfied client base. My commitment lies in understanding your specific requirements and delivering exceptional results. Let's connect and discuss how I can contribute to your success! Best regards, Neel Shah

Embedded firmware engineer, 4+ years shipping production firmware in C and C++ on ARM Cortex-M. I take products from board bring-up to certified, manufacturable firmware: ESP32, STM32, nRF52, NXP S32K, with FreeRTOS, Zephyr, and embedded Linux. Your product launch should not be delayed by flaky firmware, mystery resets, or power problems found during certification. That is what I am for. RECENT PRODUCTION WORK: - EV wallbox charger: dual-MCU architecture, ESP32 application processor plus NXP S32K144 safety controller over SPI, OCPP back end, MID-certified energy meter integration, A/B OTA with rollback and secure boot - Seven shipped home automation products: BLE Mesh, AWS IoT, Home Assistant integration, energy metering with per-unit hardware calibration, and end-of-line production test firmware for mass manufacturing - Wearable power optimisation: cut consumption by 40 percent and doubled battery life - Two medical-grade embedded systems for operating theatre use, zero post-deployment failures - Bare-metal STM32: wrote a cooperative scheduler with Cortex-M assembly context switching, plus Modbus RS-485 industrial links TECHNICAL STACK: MCU: STM32 (F1, F4, F412, H7), ESP32 (S3, C3), nRF51/52/91, NXP S32K144, Raspberry Pi, Quectel RTOS and OS: FreeRTOS, Zephyr, bare metal, Yocto, embedded Linux Wireless: BLE, BLE Mesh, Wi-Fi, Matter, Thread, LoRa Protocols: MQTT, OCPP, Modbus RTU and TCP, CAN, SPI, I2C, UART, HTTPS, TCP/IP Cloud: AWS IoT Core, Azure IoT Hub, Firebase, ThingsBoard Production: A/B OTA, secure boot, bootloaders, EOL test firmware, calibration UI: LVGL, Qt/QML HOW WE WORK TOGETHER: Week 1: discovery call, written scope, hardware and spec review, milestone plan so scope does not creep. During the build: regular progress updates rather than silence then a dump, shared repo access, demo video at every milestone. At handoff: documented code with a README and build instructions, plus a 30-day post-delivery support window. YOUR NEXT STEP: Send me a short message with your MCU, your wireless requirement, and your target date. You will get an honest answer on whether I am the right fit within a few hours, and if I am, a scoped plan with a timeline inside 24 hours. Also experienced with: ESP-IDF, STM32CubeIDE, nRF Connect SDK, device drivers, board support packages, hardware debugging with JTAG and SWD, logic analyser and oscilloscope work, EV charging firmware, bootloaders and A/B partitioning, low power design, battery optimisation and sleep modes, sensor integration, signal processing, smart home firmware, medical device firmware, industrial automation, and production test firmware.

I am a Hardware Engineer specializing in prototype-to-production electronics development. I help startups and product teams turn ideas, dev-board prototypes, and rough proof-of-concept systems into reliable custom hardware that is ready for testing, assembly, and manufacturing. My work covers schematic review, circuit design, PCB layout, embedded hardware integration, board bring-up, debugging, and manufacturing preparation. I understand that a design is not successful just because it works once on the bench. It must power up reliably, communicate correctly, route cleanly, fit mechanically, and be practical for fabrication and assembly. I have strong experience with ESP32, STM32, nRF52, wireless, IoT hardware, sensor integration, power management, motor controller , mixed-signal layout, and production-ready PCB design. I develop production-ready hardware using Altium Designer, KiCad, Cadence Allegro PCB Designer, OrCAD Capture CIS, and EasyEDA, delivering multilayer PCBs for embedded systems, IoT devices, industrial electronics, wireless products, battery-powered devices, and mixed-signal applications. I also work with real manufacturing constraints, including component availability, BOM optimization, footprint verification, JLCPCB and PCBWay assembly requirements, stack-up planning, and DFM. I am especially effective in projects that involve: • converting dev-board or module-based prototypes into custom PCBs • bringing up first-pass hardware and solving boot, power, or communication issues • cleaning up inherited schematics and layouts • improving reliability before fabrication • preparing designs for repeatable assembly and production My goal is always the same: deliver hardware that is practical, manufacturable, stable, and ready to move forward.

I've run 100+ person organizations including an MCI engineering team in the 80's and a small army of developers while I was CTO at Arthur Andersen's VLN division. I designed and manufactured most of Hydrofarm's Autopilot line of Ag Tech including upgrading their flagship Phantom lighting products and digital controls, and have designed and manufactured lighting and electronic controls for many others. I'm semi-retired now, but always looking for interesting and exciting projects, especially those requiring Asian manufacturing since I have a second home in Thailand. I’m comfortable in Altium designing circuits and laying out boards, coding in C, C++ and assembly on whatever the chosen chipset is from PICs to ARMs, ESP32, STM32, etc., and I manage and lead teams of coders and engineers better by being able to do what they do.

🚀 Top Rated Plus | ESP32 & STM32 Firmware Developer | Embedded Systems & IoT Engineer | 6+ Years Experience Looking for an experienced Embedded Firmware Developer who can turn your idea into a reliable, production-ready product? I'm a Top Rated Plus Embedded Systems & IoT Engineer with over 6 years of experience developing embedded firmware, designing custom hardware, and building IoT products for startups, SMBs, and enterprise clients worldwide. I specialize in: • ESP32 Firmware Development • STM32 Firmware Development • Embedded C & C++ • ESP-IDF • FreeRTOS • BLE • MQTT • IoT Product Development • PCB Design • LVGL • TouchGFX • AWS IoT I provide complete end-to-end engineering services, from hardware design and firmware development to cloud connectivity, GUI development, testing, and production support. ━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS HIRE ME ━━━━━━━━━━━━━━━━━━━━━━ • Top Rated Plus Freelancer with a proven track record • Production-Ready Firmware • Clean, Maintainable & Well-Documented Code • Fast Communication & Daily Progress Updates • Strong Debugging & Problem Solving Skills • End-to-End Product Development • Long-Term Technical Support ━━━━━━━━━━━━━━━━━━━━━━ FIRMWARE DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━ Programming Languages • C • C++ • Python Expertise • Embedded Firmware Development • Bare-Metal Programming • FreeRTOS • Zephyr RTOS • ESP-IDF • STM32Cube • Arduino Framework • PlatformIO • Mbed OS • Bootloader Development • Secure Boot • OTA Firmware Updates • Device Driver Development • Memory Optimization • Low Power Design • Firmware Optimization ━━━━━━━━━━━━━━━━━━━━━━ MICROCONTROLLERS ━━━━━━━━━━━━━━━━━━━━━━ Espressif • ESP32 • ESP32-S2 • ESP32-S3 • ESP8266 STMicroelectronics • STM32F0 • STM32F1 • STM32F3 • STM32F4 • STM32H7 • STM32WB • STM32U5 Nordic • nRF51 • nRF52 Microchip • PIC12 • PIC16 • PIC18 • PIC24 • dsPIC30 • dsPIC33 • PIC32MX • PIC32MK • PIC32MZ ━━━━━━━━━━━━━━━━━━━━━━ COMMUNICATION PROTOCOLS ━━━━━━━━━━━━━━━━━━━━━━ • UART • USART • SPI • I²C • I²S • CAN Bus • USB (CDC, HID, DFU, MSC) • Ethernet • RS485 • Modbus RTU • Modbus TCP • OneWire • ADC • DAC • PWM • SD Card • SDMMC ━━━━━━━━━━━━━━━━━━━━━━ WIRELESS & CONNECTIVITY ━━━━━━━━━━━━━━━━━━━━━━ • Bluetooth Low Energy (BLE) • WiFi • MQTT • HTTPS • WebSockets • LoRa • LoRaWAN • Cellular (4G/5G) • Zigbee • Z-Wave Cellular Modems • SIM7600 • EC25 • EC200U • A7672 Series ━━━━━━━━━━━━━━━━━━━━━━ CLOUD & IoT ━━━━━━━━━━━━━━━━━━━━━━ • AWS IoT Core • Google Cloud • MQTT Brokers • REST APIs • HTTPS • WebSockets • Remote Device Management • Secure Device Provisioning • OTA Firmware Updates ━━━━━━━━━━━━━━━━━━━━━━ GUI DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━ • LVGL • TouchGFX • Qt for MCUs Experience • Animated User Interfaces • Touchscreen Applications • Dashboards • TFT Displays • OLED Displays • E-Ink Displays • Capacitive Touch • Resistive Touch ━━━━━━━━━━━━━━━━━━━━━━ HARDWARE & PCB DESIGN ━━━━━━━━━━━━━━━━━━━━━━ Tools • Altium Designer • KiCad Services • Schematic Design • PCB Layout • Prototype Development • Hardware Bring-up • Design for Manufacturing (DFM) • Production Support ━━━━━━━━━━━━━━━━━━━━━━ INDUSTRIES ━━━━━━━━━━━━━━━━━━━━━━ • Industrial Automation • Consumer Electronics • Medical Devices • IoT Products • Smart Home • EV & Automotive Electronics • Wireless Products • Energy Monitoring • Sensor Networks ━━━━━━━━━━━━━━━━━━━━━━ SERVICES I OFFER ━━━━━━━━━━━━━━━━━━━━━━ • ESP32 Firmware Development • STM32 Firmware Development • Embedded C/C++ Development • ESP-IDF Development • FreeRTOS Development • BLE Firmware Development • MQTT IoT Development • Device Driver Development • Bootloader Development • OTA Firmware Updates • PCB Design • Hardware Design • Embedded GUI Development • LVGL Development • TouchGFX Development • Cloud Integration • Firmware Debugging • Performance Optimization • Legacy Firmware Modernization • Complete IoT Product Development If you're looking for an ESP32 Firmware Developer, STM32 Firmware Developer, Embedded Systems Engineer, or IoT Firmware Expert who delivers reliable, production-ready solutions, I'd love to discuss your project. Let's build something amazing together! Best Regards, Haresh Sondagar Embedded Systems & IoT Engineer

Most hardware products don't fail at the idea — they fail at execution. I lead architecture, embedded, and firmware work for founders building hardware that has to ship at production, not just demo. I'm Karlis, principal engineer and founder of null2.one — a small senior studio for 0→1 hardware product work. We work with founders, scale-ups, and engineering teams where the cost of a wrong technical decision is months and six figures. Where I'm strongest — Hardware product architecture — Embedded systems and firmware (STM32, ESP32, nRF, Linux) — Power electronics, battery, USB-PD, thermal — Sensors and closed-loop control — Robotics and mechatronics — DFM and industrialization (EVT → DVT → PVT) What I actually solve — "Our prototype works on the bench but won't survive a factory." — "We've burned months on the wrong architecture and need to reset before raising again." — "We're juggling four freelancers and have no senior technical owner." — "We need to validate the risky paths before committing to tooling and certifications." — "Our BOM looks fine on paper and is unmanufacturable at volume." How I work — three phases, fixed scope, fixed price 01. Product Definition & Architecture — 4 to 8 weeks Turn product ambiguity into explicit architectural, commercial, and production decisions before execution begins. Output: a product definition that survives contact with production. 02. Prototype & Validation — 6 to 14 weeks Architecture-first prototyping that surfaces real constraints early. EVT-grade hardware with a clear path to production. Firmware, electronics, and mechanical integrated into one validated system. 03. Production Readiness & Industrialization — 8 to 20 weeks Design for manufacturing, supplier selection, EVT/DVT/PVT gate support, end-of-line test strategy, clean handoff to manufacturing. The work that decides whether first-run yield holds. Every engagement starts with Phase 01. No exceptions. You decide whether to continue to the next phase based on what comes out of the previous one. Indicative pricing (USD) — Phase 01 — Definition & Architecture: $8k–$25k — Phase 02 — Prototype & Validation: $35k–$120k — Phase 03 — Production Readiness: $60k–$250k+ Background — Principal engineer & founder, null2.one — Senior Product Manager, Aerones — robotics for wind-turbine inspection and maintenance — CTO & CCO, NovaticLab — patent-pending robotic automation — BEng, VIA University College, Denmark — 10+ years across robotics, embedded, IoT, wearables, ruggedized industrial hardware Why this works You stop paying for time and start paying for outcomes. Each phase has a defined deliverable and a price agreed before any engineering begins. You decide whether to continue at every gate — no open-ended retainers, no scope drift. Everything we produce belongs to you: architecture, design files, firmware, test procedures, supplier relationships. No IP lock-in. Who I work with — Hardware founders who need clarity and a real architecture before raising or building — Scale-ups who need deep technical execution on a critical system — Funded startups where the next architecture decision is worth six figures of avoided rework — Engineering teams that need senior system-level leadership without hiring a CTO Not a fit — Pure SaaS or web work — "Can you just build this?" hourly task work — Sub-$5k scopes — Buyers shopping primarily on price — Branding or marketing-only engagements Next step If you have a hardware product where the technical decisions are expensive to get wrong, send the job invite. I respond within one business day with an honest read on whether we're a fit. If we are, we scope a Phase 01 — fixed price, defined deliverable, no commitment beyond that.

Hello! I’m a passionate and experienced Electrical Engineer specializing in PCB design & layout, Arduino programming, IoT development, ESP modules, and embedded systems. I turn complex ideas into functional and reliable hardware—designed for performance, efficiency, and scalability. 🛠️ Key Skills & Expertise: 1- PCB Design & Layout: Professional PCB design using Altium, KiCAD, and Eagle, including multi-layer boards, DFM-ready Gerber generation, and BOM preparation. 2- Arduino & Microcontroller Programming: Developing firmware for Arduino, ESP8266, ESP32, and other MCUs with precise sensor/actuator control. 3- IoT Systems Development: Creating smart, connected devices for home automation, industrial monitoring, and remote control using MQTT, HTTP, and other protocols. 4- Embedded Systems & Prototyping Designing and testing integrated hardware-software solutions with reliable EEPROM-based data handling and wireless communication. 5- ESP Module Integration: Building Wi-Fi/Bluetooth-enabled devices with robust connectivity and OTA capabilities. 🌐 Experience Highlights: ✅ Designed custom PCBs for consumer, industrial, and automation projects with optimized layout and minimal EMI. ✅ Developed Arduino & ESP-based IoT systems for real-time monitoring and control. ✅ Delivered fully tested prototypes from schematic to final PCB fabrication and assembly. ✅ Successfully implemented EEPROM-based storage systems for critical data retention. ✅ Maintained 100% client satisfaction with consistent 5-star feedback on Upwork. Why Choose Me? ✅ End-to-End Service: I handle everything from your idea to a working prototype or production-ready PCB. ✅ Professional Designs: Industry-grade PCB layout with EMI/EMC consideration and design rule checking. ✅ Clear Communication: Regular updates, transparent processes, and collaborative decision-making. ✅ Cost & Space Optimized: I focus on minimizing board size and component cost without sacrificing performance. ✅ Updated with Industry Trends: Always learning the latest in PCB technologies, design tools, and embedded systems.

🔌 Powering 3.5M+ connected devices worldwide. I deliver end-to-end IoT and AI-powered solutions from firmware to cloud for Smart Home, Automotive, Energy, and Healthcare industries. 📊 WHY CLIENTS CHOOSE ME: • 3.5M+ IoT devices connected in production (Geeni smart home ecosystem) • 10+ years building IoT products, from PoC to mass production • 599+ hours on active firmware contract (Zephyr RTOS, Nordic, BLE) • AI-powered development: agentic pipelines, intelligent automation, ML integration for IoT • HIPAA-certified team for medical IoT projects • Top Rated Plus, 100% Job Success Score 🔧 WHAT I BUILD: → Firmware Development: Zephyr RTOS, FreeRTOS, ESP32, STM32, NRF, ARM Cortex. SPI, UART, I2C, Modbus, GPIO → Wireless Connectivity: BLE 5.3, Matter, Thread, Zigbee, LoRa, MQTT, LTE-M, NB-IoT, WiFi → IoT Cloud Platforms: AWS IoT Core, Azure IoT Hub, Google Cloud IoT, Firebase, InfluxDB → AI & ML for IoT: predictive maintenance models, anomaly detection, sensor data pipelines, edge AI, agentic workflows → Mobile IoT Apps: React Native, Flutter, Swift, Kotlin — companion apps for connected devices → Security & Compliance: TLS, OAuth2, JWT, Secure Boot, OTA updates, HIPAA compliance 🤖 AI ENGINEERING: I integrate AI across the full IoT stack from edge inference on embedded devices to cloud-based ML pipelines. I build agentic AI systems, intelligent automation workflows, and enterprise-grade AI pipelines that go beyond simple chatbots into production-ready infrastructure. 🏗 INDUSTRIES WE SERVE: • Smart Home — built app ecosystem for 3M+ devices (smart bulbs, cameras, sensors, switches) • Automotive — OBD-II fleet management, connected car platforms, predictive maintenance • Energy — Smart Grid management, EV charging, HVAC telematics with cellular IoT • Healthcare IoT — ECG monitoring wearables, Remote Patient Monitoring (RPM), HIPAA-compliant platforms 👥 TEAM: I also lead a dedicated team of 20+ engineers: embedded/firmware, AI/ML, mobile (iOS + Android), backend, QA, DevOps, and project management. We can work as your extended engineering team — same timezone overlap, daily standups, transparent communication. 💬 MESSAGE ME with your IoT or AI project details — I'll respond with relevant case studies and a preliminary architecture within 24 hours.

Clinical Insight Meets Advanced Engineering I am a Biomedical Systems Engineer with a Master’s degree in Embedded Systems and Medical Equipment, combined with 8 months of frontline clinical experience as a Radiology Technician and OR Nurse. This gives me a unique perspective to design safe, effective, and practical medical devices and IoT solutions. I specialize in embedded systems, IoT, and web-connected devices, delivering end-to-end solutions from sensor acquisition to web dashboards. My projects combine hardware, software, and user-focused design, ensuring devices are both functional and reliable in real-world medical or industrial environments. Core Technical Expertise: Embedded Hardware: Arduino, ESP32, Raspberry Pi, NVIDIA Jetson Nano, OpenPilot CC3D Biomedical Sensors: ECG, SpO₂, Temperature, Heart Rate, Ambient Sensors IoT & Communication: MQTT, HTTP, REST APIs, Device-to-Cloud Integration Web & Mobile Apps: Node.js, Express.js, MongoDB, Bootstrap, Mobile App Control Edge & Real-Time Systems: Sensor acquisition, data processing, dashboards Hardware–Software Integration: Firmware development, debugging, and optimization Selected Projects: Smart Patient Monitoring System: Jetson Nano + multiple sensors + MERN dashboard for real-time health tracking Myoelectric Prosthesis Prototype: Embedded control system with sensor integration Automated Room Sterilization System: Arduino + UV LEDs + Mobile App Quadcopter with Video & Image Capture: Raspberry Pi + OpenPilot CC3D + Web App Arduino Drawing Tablet Network: Multiple devices connected to mobile app for interactive drawing I provide clean, well-documented, and stable systems designed for biomedical, IoT, and automation applications. If you are looking for a single engineer who can handle embedded hardware, cloud-connected devices, and web dashboards, I’m ready to help you prototype, develop, and scale your next project.