Rizwan A.

Top-Rated Embedded Systems Engineer & IoT Product Developer From Concept to Mass Production: High-Performance Firmware, Multilayer PCB Design, and Secure Cloud Connectivity. Are you looking for an experienced Embedded Systems Engineer who can take your product from an initial concept to a production-ready, reliable reality? As a results-driven Embedded Hardware & Firmware Developer, I specialize in designing high-performance, ultra-low-power embedded systems, robust custom firmware, and scalable IoT solutions. Whether you need a secure wireless sensor node, complex industrial automation hardware, or a complete PCB layout, I deliver production-grade engineering tailored to strict performance and power budgets. 🛠️ Core Expertise & Technical Stack Microcontrollers & SoCs: ESP32 (ESP32-S3, ESP32-P4), STM32, Nordic nRF Series (nRF52, nRF53, nRF91), Raspberry Pi & RP2040, ARM Cortex-M Firmware Development: Advanced C/C++, Bare-Metal Programming, FreeRTOS, Zephyr RTOS, Low-Power/Sleep Mode Optimization, Hard Debugging PCB Design & Layout: Multilayer, High-Speed, Low-Noise Schematics & Layouts using Altium Designer, KiCAD, EasyEDA Pro, Fusion 360, LTspice Wireless & Communication Protocols: BLE (Bluetooth Low Energy), Thread, Zigbee, LoRaWAN, Wi-Fi, Ethernet, CAN Bus (J1939), UART, SPI, I2C, USB IoT Architecture & Cloud: MQTT, REST APIs, Secure OTA (Over-The-Air) Updates, AWS IoT Core, Azure IoT Hub, Ubidots Embedded Linux & Co-Design: Custom Linux builds, driver integration, EMI/EMC mitigation, hardware-software co-design, and comprehensive validation 🚀 Services I Provide End-to-End Embedded Product Development: Proof-of-Concept (POC) to manufacturing-ready Gerber files, BOMs, and prototypes. Custom Firmware Development: Clean, maintainable, real-time optimized code built on bare-metal architectures or RTOS (FreeRTOS/Zephyr). Professional PCB Layout & Schematic Capture: Multi-layer, signal-integrity-focused designs ready for seamless fabrication. Low-Power IoT Solutions: Battery-optimized devices featuring advanced power management and energy harvesting for long deployment lifespans. Wireless & Protocol Implementation: Custom Nordic nRF BLE stacks, mesh networks, and industrial communication interfaces (CAN/RS485). System Testing & Documentation: Thorough debugging, validation, clear schematics, and production handoff documentation. 🏭 Industries I Serve Industrial Automation & Robotics Automotive & CAN Data Systems Smart Agriculture & Environmental Monitoring Wearables & Consumer Electronics Smart Home Automation & IoT Networks 💡 Why Work With Me? I bridge the gap between hardware and software, ensuring your physical electronics and firmware work together flawlessly under real-world conditions. You’ll get clean, fully documented code, reliable hardware architectures, and transparent, professional communication throughout your project lifecycle. Let’s turn your idea into a market-ready product. Click "Hire Me" or send a message to discuss your project requirements today!