Muhammad Ammar Y.

"Really experienced firmware programmer, knowledgeable about hardware design, which makes him a good solution provider." - Nizan (Upwork client) Hi, I'm Ammar, a Senior Embedded Engineer with 12+ years of experience. I build firmware and IoT devices that don't just work on the bench, they keep working in the field. QUICK FACTS Days: Monday to Friday Hours: Flexible Time zones: PKT, Europe, US East WHAT I CAN DO FOR YOU • Firmware development: bare-metal and RTOS (FreeRTOS, TI-RTOS, Micrium OS-III) in C and C++ • Embedded Linux: system programming, drivers, kernel work, shell scripting • IoT devices: ESP32, nRF52, nRF9160, TI CC32, Telit and u-blox modules, u-blox GNSS • Secure networking: TCP/IP, UDP, HTTP, MQTT, SSL/TLS, AWS IoT Device Management • Hardware bring-up and debugging: I2C, SPI, UART, USB, Ethernet • PCB review, schematic design and system integration TYPICAL PROJECTS • Working prototypes with sensors, motor control and connectivity • Taking a prototype to a stable, production-ready product • Fixing or stabilizing firmware on an existing device • Reading and documenting existing C firmware (ESP32 and STM32) • Industrial controllers, smart home and relay control, audio and IoT boards WHY CLIENTS WORK WITH ME ✔ I understand both hardware and software, so problems get solved faster ✔ Production-focused code, not demo-only code • Clean, documented, maintainable firmware • Clear communication and on-time delivery Clients mention clear communication, reliable delivery and strong technical knowledge. Tell me what you are building, what is not working, and your deadline. I will reply within a few hours with a clear plan.