Kernel Hacker
Noun · Hacker Culture
Definitions
A programmer who works on operating system kernels or similarly low-level systems code involving schedulers, memory management, drivers, filesystems, or core interfaces. The term carries strong credibility in systems-oriented tech culture because of the difficulty and risk of the work.
In plain English: A programmer who works on the deepest core parts of an operating system.
Example: "Only a kernel hacker would call that page-table bug a relaxing weekend project."