How to hire your first engineer - https://blog.ycombinator.com/how-to-hire-your-first-engineer...
Convincing Engineer to join your team and a basic structure for the process - https://blog.ycombinator.com/convincing-engineers-to-join-yo...
General thoughts about hiring - http://blog.samaltman.com/how-to-hire
The book "Who" gives a good idea about a good process. Hard to apply when you are not looking for a "generalist" - https://www.amazon.com/Who-Geoff-Smart/dp/0345504194/
Some of the manager tools podcasts episodes - https://www.manager-tools.com/map-universe/hiring-0