I've worked on all the levels of the Linux graphics stack, from the kernel to the X Server to the OpenGL implementation to the cairo vector graphics library.
Since 2019 I've been working for Google on the graphics drivers for Chrome OS, including the reverse-engineered Qualcomm driver.
Prior to that I was at Broadcom working on Raspberry Pi's graphics driver. In the process I stumbled into becoming the kernel maintainer for the platform and soon turned into an expert on ARM SOCs. This was not my plan, but it was a fun ride.