Zeshan C.

I design embedded hardware and firmware that has to work in the field, not just on the bench: avionics, industrial machines and connected IoT products, from schematic to production. 9+ years in embedded engineering. Team Lead at Zero Axis Technology, where our team has delivered 1,263+ hours on Upwork with 100% Job Success and Top Rated Plus status. WHAT I CAN DO FOR YOU • Firmware: bare-metal and RTOS (Zephyr, FreeRTOS, TI-RTOS) on STM32, Nordic nRF52/nRF53, ESP32, TI, Renesas and Microchip • Hardware: multilayer PCB design in Altium, including schematic, layout, BOM, board bring-up and validation • Protocols: CAN, RS485/Modbus, SPI, I2C, UART, BLE, LoRa, LTE/NB-IoT, MQTT, MIL-STD-1553B • Embedded Linux: PetaLinux and Yocto-style builds, drivers, Zynq SoC/FPGA integration • IoT end to end: sensor, device, then secure cloud (AWS IoT) SELECTED WORK • ATEX/IP66 gas telemetry controller: STM32-based field unit for hazardous, explosive-atmosphere metering sites. It reads pressure, temperature and Namur/pulse gas-meter encoders; talks to an EVC over isolated RS232/RS485 and an optical interface; and powers and supervises an LTE modem. A local display and keypad let technicians commission it without a laptop. I built the hardware in Altium and the enclosure in SolidWorks, to ATEX and IP66 requirements. • Avionics: firmware and hardware for MIL-STD-1553B systems, plus a MATLAB test GUI for chassis validation • Industrial: upgraded pipe cleaning, coating and inspection machines to Aramco standards • Universal heat pump controller: custom PCB and embedded firmware • USB-C PD board with audio DAC and OLED: full PCB design • Smart safety helmet: gas sensing, Zigbee/BLE, SD logging and RTC HOW I WORK • Clear written plan and estimate before any work starts • Regular progress updates with schematics, code and test results you can review • Documentation and clean handover, so your team can maintain the design after me Have a schematic, a half-finished prototype or just an idea? Send me the details. I'll reply with a technical approach and estimate within 24 hours.