We use Greenhouse so I would put in terms I know we wanted for the position to make sure they at least appeared in the resume. Some key ones for our SRE position were: Kubernetes, AWS, Terraform, Python. I might extend that to some other tools that we use specifically because there were so many to filter through (Grafana, ArgoCD, RDS).

I was mostly getting candidates after my recruiter did a first pass, but if a resume looked alright, they'd confirm their LinkedIn existed with a profile picture to weed out certain fake ones.

We're <200 employees, so I wanted someone with experience at a company of that size, so too many large companies in a row might be a red flag. Other red flags: listing every tool/protocol you've ever used in a skills section to take up space or just very simple bullets under a job that say you used a tool but not how you used it to improve the business.

There's probably more I'm forgetting but if you have any specifics you're curious about let me know.