Usman C.

I help startups, product teams, and hardware companies 𝐝𝐞𝐬𝐢𝐠𝐧, 𝐝𝐞𝐯𝐞𝐥𝐨𝐩, 𝐚𝐧𝐝 𝐬𝐡𝐢𝐩 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐞𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 by combining 𝐟𝐢𝐫𝐦𝐰𝐚𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱, 𝐈𝐨𝐓 𝐜𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐫𝐞𝐚𝐥-𝐰𝐨𝐫𝐥𝐝 𝐡𝐚𝐫𝐝𝐰𝐚𝐫𝐞–𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧. With 𝟏𝟓+ years of experience in 𝐞𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐂 𝐚𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, I focus on 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐦𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐚𝐛𝐥𝐞, 𝐚𝐧𝐝 𝐦𝐚𝐧𝐮𝐟𝐚𝐜𝐭𝐮𝐫𝐚𝐛𝐥𝐞 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 — not quick prototypes that break at scale. If you need 𝐄𝐒𝐏𝟑𝟐 𝐟𝐢𝐫𝐦𝐰𝐚𝐫𝐞, 𝐧𝐑𝐅𝟓𝟐/𝐧𝐑𝐅𝟓𝟐𝟖𝟒𝟎/𝐧𝐑𝐅𝟓𝟑𝟒𝟎, 𝐃𝐅𝐔, 𝐙𝐞𝐩𝐡𝐲𝐫 𝐨𝐫 𝐅𝐫𝐞𝐞𝐑𝐓𝐎𝐒 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, 𝐘𝐨𝐜𝐭𝐨-𝐛𝐚𝐬𝐞𝐝 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱 𝐜𝐮𝐬𝐭𝐨𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧, 𝐬𝐞𝐜𝐮𝐫𝐞 𝐎𝐓𝐀 𝐩𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬, 𝐨𝐫 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞 𝐈𝐨𝐓 𝐝𝐞𝐯𝐢𝐜𝐞 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, I deliver structured engineering from bring-up to deployment. 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 𝐁𝐞𝐬𝐭 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐅𝐢𝐫𝐦𝐰𝐚𝐫𝐞 & 𝐌𝐢𝐜𝐫𝐨𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐞𝐫 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • ESP32 firmware (Wi-Fi, BLE, MQTT, REST, OTA) • Nordic nRF52 / nRF52840 firmware & DFU • STM32, ARM Cortex-M, Arduino-based systems • Bare-metal, FreeRTOS, Zephyr development • Secure OTA (including production-grade FOTA systems) • Low-power design & optimization • Clean, scalable C/C++ firmware architecture 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱 & 𝐎𝐒-𝐋𝐞𝐯𝐞𝐥 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • Yocto-based Embedded Linux development • Linux bring-up on Raspberry Pi & custom boards • Driver integration & hardware debugging • Application-layer firmware on Linux • Production hardening & system optimization 𝐈𝐨𝐓 & 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 • AWS IoT Core, MQTT, TCP/UDP • Wi-Fi, BLE, LTE, GNSS, LoRa, CAN • Secure device-to-device communication • Gateway architecture & cloud integration • Reliable data transmission & validation 𝐇𝐚𝐫𝐝𝐰𝐚𝐫𝐞–𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • ESP32, STM32, Nordic, u-blox, BeagleBone, Raspberry Pi • Sensor integration (IMU, environmental, GNSS, flow, etc.) • Hardware bring-up & debugging • Oscilloscope & logic analyzer-based validation • System-level architecture & scalability planning 𝗧𝗲𝘀𝘁𝗶𝗻𝗴, 𝗩𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻 & 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗥𝗲𝗮𝗱𝗶𝗻𝗲𝘀𝘀 • Hardware & firmware testing • Debugging & troubleshooting • Performance optimization & reliability testing • Simulation, emulation & field-deployment validation • Production-ready handoff & documentation 𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐅𝐎𝐓𝐀 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐟𝐨𝐫 𝐮-𝐛𝐥𝐨𝐱 Architected and implemented a complete firmware-over-the-air system with secure updates and version control. 𝐍𝐨𝐫𝐝𝐢𝐜 𝐁𝐋𝐄 𝐖𝐞𝐚𝐫𝐚𝐛𝐥𝐞 𝐒𝐲𝐬𝐭𝐞𝐦 (𝐧𝐑𝐅𝟓𝟐𝟖𝟒𝟎-𝐃𝐨𝐧𝐠𝐥𝐞/𝐧𝐑𝐅𝟓𝟑𝟒𝟎) Designed GATT architecture with 517-byte MTU, serial command interface, and multi-sensor communication stack. 𝐋𝐨𝐑𝐚-𝐁𝐚𝐬𝐞𝐝 𝐒𝐦𝐚𝐫𝐭 𝐃𝐨𝐨𝐫 𝐋𝐨𝐜𝐤 (𝟐𝟎𝟎+ 𝐔𝐧𝐢𝐭𝐬) Built secure unlock feedback system with device-to-device communication and structured unit validation logic. 𝐒𝐦𝐚𝐫𝐭 𝐀𝐪𝐮𝐚𝐫𝐢𝐮𝐦 & 𝐏𝐥𝐚𝐧𝐭 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 Designed real-time environmental monitoring systems integrating sensors, pumps, and actuators with embedded control logic. 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 Firmware: C, C++, Embedded C, FreeRTOS, Zephyr, ESP-IDF, Nordic SDK, Arduino Embedded Linux: Yocto, Buildroot, OpenWrt Hardware Platforms: ESP32, STM32, nRF52, nRF53, ARM Cortex-M, Raspberry Pi, u-blox Connectivity: Wi-Fi, BLE, LTE, GNSS, LoRa, CAN, MQTT, REST, MODBUS Cloud & IoT: AWS IoT Core Tools: Git, CI/CD pipelines, Keil, PlatformIO, Oscilloscopes, Logic Analyzers 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 End-to-end embedded expertise (firmware to deployment) Strong OTA and connectivity background Production-focused engineering mindset Clean, maintainable code architecture System-level debugging capability Experience supporting hardware bring-up and manufacturing transition Long-term collaboration & NDA-friendly 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Embedded Systems, Firmware Development, ESP32, nRF52840, nRF5340, Zephyr, FreeRTOS, Embedded Linux, Yocto, IoT, OTA, FOTA, ARM Cortex-M, MQTT, LoRa, BLE, AWS IoT, Modbus, Sunspec, Hardware Software Integration, Low Power Design, Production Firmware 𝗛𝗮𝘀𝗵𝘁𝗮𝗴𝘀 #EmbeddedSystems #FirmwareDevelopment #ESP32 #IoT #EmbeddedLinux #Microcontrollers #RTOS #FreeRTOS #HardwareEngineering #FOTA #OTA #IOT #MODBUS #SunSpec #LowPowerDesign #ProductionReady #IoTGateway If you need an 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 and 𝐈𝐨𝐓 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 with deep expertise in firmware, hardware design, manufacturing processes, and real-world deployment, I’m ready to collaborate.