[OkayPhysicist]

If you're not talking about compensation, you're leaving money on the floor. I'm no "best engineer", but I've never failed to get meaningful bumps to my starting comp by giving some pushback on a company's initial offer. Most of the time the only leverage you'll have is the innate friction in the hiring process: By the time a company has extended an offer to you, they've committed non-trivial resources convincing people you're the right pick. It's a PITA to throw all that away, so something like "I'm very interested your offer. For $(offer+X) I could sign today" or "I like your company, but you're offering a bit below market rates. (A contractual pay bump after 3/6 months, an additional week PTO, whatever) or an extra $X would make me willing to accept immediately." will likely work. This should be ideally in person, or at lease over the phone or VOIP, so you have the opportunity to smooth things over and retreat with your tail between your legs if they take it very poorly, but I've never seen that happen. Worst I've heard of is a firm "Sorry, that's the offer, take it or leave it", leaving the applicant no worse off than they were before.

Not negotiating compensation just means you're paying a conflict avoidance tax.