Should I add a skills section?

I think a skills section could be valuable if you actually have skills that do not fit cleanly into the experiences you listed.

For example, if you have a bunch of older jobs or internship that you left off, you can list them in a skills section. But be careful not to go overboard here (especially if you're junior), since it can otherwise appear that your claims of proficiency are fake.

I actually originally had a skills section on earlier versions of my resume. I removed it later on as the technologies were organically woven into the experience sections anyways, and I was running out of space due to my work experience and side projects growing rapidly.

I definitely don't think you need one (I'm living proof of that), but if you have the space, you can put it down. It'll reinforce your resume a little bit against the ATS keyword checking in theory. I don't think it hurts you unless you need the space.