Huzaifa A.

I design PCBs and write firmware for connected devices built on ESP32, STM32, Nordic nRF and Embedded Linux, using BLE, Wi-Fi, LTE and LoRa. 413 Upwork jobs and 13,500+ hours so far, mostly taking products from schematic to a working, manufacturable board. Whether you have a new product idea, a prototype that needs a proper PCB, or a board that isn't working, I can pick it up at any stage. PCB and hardware design • Schematic capture and multilayer PCB layout in Altium Designer and KiCad • Low-power and battery-powered designs, Li-ion charging, BMS and power management • RF module and antenna placement for BLE, Wi-Fi, and LTE • BOM, Gerbers, assembly files and DFM review, ready for JLCPCB, PCBWay or your own manufacturer Embedded firmware • Embedded C/C++ on ESP32 (ESP-IDF, Arduino), STM32 (HAL, CubeIDE) and Nordic nRF52/nRF53 (nRF Connect SDK, Zephyr) • Embedded Linux and Raspberry Pi • BLE, Wi-Fi, LTE Cat-M1, NB-IoT, LoRa, GPS/GNSS and NFC • Sensor and peripheral integration over UART, SPI, I2C, RS-485, CAN, Modbus and ADC/DAC Testing and fixes • Board bring-up, debugging, and firmware validation • Reviewing and fixing existing schematics and layouts before you order boards Industries I've worked in: IoT, wearables, medical electronics, industrial monitoring, automation, smart sensors, and consumer electronics. When a project needs more than electronics, my team also covers enclosure design, mobile apps and cloud, so you have one point of contact for the whole product. To get started, send me: • what the device needs to do • the chip or platform you have in mind, if any • power source and connectivity • any existing schematic, PCB, or code • expected production volume I'll reply with a clear scope, timeline and price. Huzaifa