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I help founders and engineering teams turn embedded concepts into production-ready IoT products - not just prototypes. I’ve worked on commercial IoT devices deployed in the European Union, taking full ownership of firmware, PCB design, and wireless communication to ensure reliability, manufacturability, and long-term stability. What I specialize in ☑️ PCB Design & Hardware Ownership Single and multi-layer boards designed for manufacturing, testing, and deployment. ☑️ Firmware for Real Products Clean, maintainable C/C++ firmware for ESP32-based systems. ☑️ Production-Grade Communication UART, I2C, SPI, MQTT, HTTP, BLE, Wi-Fi, OTA, ESP-NOW — implemented with reliability in mind. ☑️ End-to-End IoT Systems From schematic and PCB to firmware, cloud integration, and field deployment. What you get when you work with me • Manufacturer-ready deliverables (BOM, Gerbers, Pick-and-Place) • BOM optimized for cost and regional availability • Design decisions based on real deployment experience • Clear communication and product-level thinking Background • Embedded Systems Engineer at a German IoT company • Top-Rated on Upwork with consistent 5-star feedback • Experience delivering multiple commercial IoT product lines If you need someone who understands what happens after the device ships, let’s talk. 📩 Available for consultation, fixes, or full product develop

We are a specialized team in IoT, Robotics, and Embedded Systems development, led by Engineer Mahmoud, an Expert Embedded Engineer with 10+ years of hands-on experience in electronics design, firmware development, and system integration. As a B2B engineering team, we help startups and businesses transform ambitious product ideas into market-ready smart solutions, with direct communication with the team lead for clarity, accountability, and technical depth. 1. Hardware / Electronics Design --------------------------------------- 🔹 Analog Electronics - High-accuracy measurements - Noise filtration - Signal amplification - DAC/ADC conversions 🔹 Digital & High-Speed Electronics - Memories: DDRx, LPDDR, SDRAM - Camera & display interfaces: MIPI-DSI/CSI, DisplayPort - Data communication: QSPI, SPI, UART, I2C, FMC, I2S, USB 2/3.x 🔹 RF & Wireless Designs - Radars: 50–60 GHz - 1–6 GHz: UWB, Wi-Fi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave - NFC & RFID: 13.56 MHz & 128 kHz - Custom protocols: 433 MHz 🔹 PCB / FPC Design - Schematics & layout: Altium, KiCad, EasyEDA - High-speed & RF optimized boards --------------------------------------------------------------------------------- 2. Firmware Design (C/C++) --------------------------------- 🔹 Languages & Frameworks - C, C++, Assembler - GUI libs: LVGL, TouchGFX, emWin - Security: WolfSSL, MbedTLS - Sensor fusion: osxMotionFX (Kalman-based) - Files & network: FatFS, lwIP, WICED, Amazon FreeRTOS, Paho MQTT - AI: TensorFlow Lite 🔹 Embedded OS: A- FreeRTOS, Zephyr, TI-RTOS, Embedded Linux, Yocto, ROS 🔹 MCUs & MPUs - STM32, ESP32/ESP8266, NXP, Nordic, TI, Microchip, Cypress, Silicon Labs, Holtek, Kinetis - MPUs: Analog Devices ADSP-2156x, Qualcomm Snapdragon, Allwinner, ST STM32MP1 - SOMs: NVIDIA Jetson (Nano, Orin), Toradex, Raspberry Pi CM, Inforce, Sensiedge 🔹 Interfaces & Protocols - Interfaces: I2S, SAI, MIPI-DSI/CSI, USB 2/3.x, LTDC, DDR3/DDR4/LPDDR4, I2C, SPI/QSPI, UART, CAN, Ethernet - Wireless: NB-IoT, LTE-M, GPRS, GPS, UWB, Wi-Fi, BLE, ZigBee, Z-Wave, LoRa, Thread, 6LoWPAN, Sub 1GHz, NFC, RFID - Protocols: MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, Custom protocols - Security: AES, SSL/TLS, custom algorithms -------------------------------------------------------------------------------------------------------------- 3. Software & UX/UI Design ---------------------------------- 🔹 Applications: Android, iOS, Windows, Linux 🔹 Embedded GUI & UX: Touchscreen & embedded display design 🔹 System-level Software: Linux kernel & user-space development 🔹 Cloud Integration: AWS, Azure, Google Cloud, MQTT brokers 4. Embedded QA & Testing -------------------------------- 🔹 Manual & Automated Verification A- PCB/FPC inspection B- Functional & unit testing (Firmware/Software) C- Stress, performance, and environmental testing (temperature range, reliability) 🔹 Simulation & Advanced Testing A- Robotics & electromechanical systems: ROS, Gazebo B- Physics-based simulations: control, electromagnetics, dynamics C- AI/ML integration with embedded systems ------------------------------------------------------------------- 5. Value We Deliver ----------------------- ☑ Research – Feasibility & technology analysis ☑ Problem Solving – Debugging & troubleshooting complex issues ☑ Proof of Concept (PoC) – Idea validation to working demos ☑ Optimization – Performance tuning, cost & efficiency improvements ☑ Prototyping → Productization – MVP to production-ready solutions ☑ Custom Solutions – Tailored designs for unique business challenges ☑ Full Turnkey Development – Hardware, firmware, software, QA & documentation 6. Tools & Platforms ------------------------ 🔹 Electronics: Altium, KiCad, EasyEDA 🔹 Firmware: C/C++, FreeRTOS, Zephyr, Embedded Linux 🔹 Software: Python, Java, C#, Flutter 🔹 Simulation: MATLAB/Simulink, ROS/Gazebo 🔹 Cloud / IoT: AWS IoT, Azure IoT, Google Cloud, MQTT brokers 7. Example Projects ------------------------ ⚡ IoT air quality monitoring system (ESP32 + LoRa + AWS) ⚡ Smart wearable glasses with embedded AI assistant ⚡ Portable ECG healthcare device with BLE app & cloud integration ⚡ Powermeter / Power monitoring system ⚡ Inverter design & control ⚡ Joystick / Gamepad development ⚡ Smart door with AI camera ⚡ Tracking camera system ⚡ Robotic arm with custom electronics ⚡ Bluetooth & Wi-Fi scanner ⚡ PLC (Power Line Communication) project ⚡ Accelerator/sensor integration system ⚡ RFID-based access & tracking system ⚡ LiDAR-based navigation or mapping ⚡ Induction heater control system 8. Why Clients Choose Us ------------------------------- ☑ Full-stack engineering: Hardware + Firmware + Software + QA ☑ Direct communication with the team lead ☑ Experience across industrial, medical, robotics, and IoT sectors ☑ End-to-end delivery: Concept → Prototype → Mass Production

✅ 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.

Do you have an innovative electronic product idea?, what if you can have your ideas developed from concept to completion, and made into reliable and robust solutions while knowing your project was in the hands of someone you trust that could: ✅Design hardware schematics. ✅Design PCBs and produce full standard production files. ✅Optimize components BOMs and coordinate with fab houses. ✅Develop custom embedded and IOT firmwares. ✅Integrate hardware and software efficiently and successfully. Look no further!. With 5+ years of experience in various types of projects and a wealthy skill set I’m ready to transform your concepts into fully functional systems and products while guiding you through every step of the process. Skills : IOT: ✅ESP32 and ESP8266. ✅Bluetooth and BLE-enabled devices. ✅WiFi and internet connectivity management. ✅MQTT - HTTPS - Websockets - Firebase and more. ✅GSM Tracking devices. ✅Battery-powered devices. ✅Wearable devices. ✅Smart home automation. PCB Design: ✅Softwares: KiCAD - Eagle CAD - EasyEDA - Proteus. ✅Multilayer design. ✅Component selection. ✅Standard manufacturing documents for JLCPCB, PCBWay, etc. Firmware Development: ✅Languages: C - C++ - Python. ✅MCUs: ESP32 - ESP8266 - Raspberry Pi - Arduino - AVR - PIC. Just shoot me a message and let’s start DEVELOPING!.

Your prototype works on the bench. The first time a real customer plugs it in, it falls over — Wi-Fi setup fails, the firmware locks up after a week, the battery dies in three days instead of three months. That's the gap I close. I'm an embedded systems and IoT engineer. I take connected devices from "it works for me" to "it ships to customers and survives in the field." Most of my work falls into three areas: Embedded firmware on ESP32, STM32, nRF52, RP2040, AVR, and Raspberry Pi. C/C++ and Python. FreeRTOS and bare-metal. Low-power design when battery life matters — pushing sleep currents into single-digit µA, debugging the wake-up paths, tracking down the rogue peripheral that's keeping your device awake. Connectivity across BLE, Wi-Fi, MQTT, LoRa, LTE-M, NB-IoT, CAN, RS-485. Consumer IoT and headless devices. Captive-portal Wi-Fi onboarding so a non-technical customer can set up the device from their phone. Systemd watchdog services that recover from network drops automatically. OTA update infrastructure for fleet deployment. SD card write minimization on Linux-based devices, because the field failure mode no one warns you about is filesystem corruption six months in. PCB design when the project needs it. 2 to 8 layer boards in KiCad and Eagle, IPC-2221/7351 compliant. DFM and DFT review baked in from the schematic stage. Signal integrity, RF layout, and the kind of board-level decisions that affect yield, cost, and certification much more than firmware ever will. A few things worth knowing about how I work: I'm honest about scope. If your project doesn't need a custom PCB, cloud infrastructure, or edge ML, I'll tell you. I'd rather build the right thing for your actual budget than oversell. I think about the device's whole life, not just the demo. SD card longevity, Wi-Fi recovery, what happens when your customer's router changes, what happens when the firmware bug shows up in month six. The failure modes that matter are rarely the ones that show up on day one. I document for the human who comes after me. The setup guides and handoff docs I write are aimed at a non-technical reader — your future self, your in-house team, or whoever takes ownership when the contract closes. If you're building a connected device and the path from working prototype to shipping product isn't obvious yet, send me a message with what you're working on. I'll tell you honestly whether I can help.

Top-Rated Embedded Engineer, 40+ projects shipped. I build STM32/ESP32 firmware, PCB designs, and custom PySide6/Qt desktop tools that turn hardware concepts into products. Most hardware projects stall in the gap between the silicon and the software that has to drive it. That's exactly where I work, I take a project from schematic and PCB layout, through low-level firmware, all the way to the desktop application your team uses to configure, test, and visualize the system. What I build: • Firmware & embedded C/C++ - STM32 and ESP32 development, from bare-metal drivers to production firmware, with hardware bring-up and debugging. • Hardware & PCB - DFM-ready schematic capture and PCB layout in Altium and KiCAD, designed alongside the firmware so the two actually fit. • Desktop tools & GUIs - Native PySide6 / PyQt / C++ applications purpose-built for hardware interfacing, instrument control, data visualization, and automated test. • Automation & reliability - Self-hosted n8n pipelines with custom Python/JavaScript, plus CI/CD, Git, and automated unit testing across C and Python codebases. Because I own both sides - the hardware and the software that controls it, you don't have to coordinate two contractors who blame each other when something doesn't talk. You get one engineer accountable for a working, production-ready system. If you've got an embedded product, a test rig, or a hardware-control tool that needs building, send me the details and I'll tell you straight whether it's a fit and how I'd approach it.