I am a Senior System Software / Firmware / Embedded Engineer.

System software development for Linux & Unix and/or Windows. I always have one foot in Ring 0 and the other foot in Ring 3.

Specialties: Working in both kernel space and user space, on various OSes. Linux, Windows, BSD Unixes. Especially embedded computing systems(including IoT), working with I²C, SPI, PWM, A to D, D to A, multiple styles of timer, interrupts, and power management.