Gregory L.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I have 8 years experience in developing BSP and drivers for various embedded operating systems such as Linux, Android, and Windows Embedded Compact. I am familiar with various hardware platforms, mostly ARM based, such as processors from Freescale, Texas Instruments, NXP, Altera, Xilinx, and others... I have a deep knowledge of the Linux kernel internals, and give Linux kernel trainings to embedded professionals on a regular basis. I also have a great knowledge of C/assembly low-level programming for µControllers running bare-metal. I have years long experience with controllers and buses such as I2C, SPI, UART, USB, PCIe, SDHC, etc... Most of all, I am passionate about everything embedded from small headless memory-constrained devices to high-end graphical tablet-like devices.