Had the same exact issue. Sprayed the living shit out of the baseboards, both inside and outside with this spray you can get on Amazon. I only ever see a living spider once every few months now.
Years ago I moved into a place that had roaches. A flying one even woke me up one night cause it was so big I could hear it moving around. I got this that same night off Amazon and it worked great. Works for spiders too. I will say that when I first sprayed a bunch of spiders came out of hiding but after the second spray around my place it was rare to see them
1.Ortho Home Defense - spray around the exterior of your doors and windows and other places where bugs may get in
2a. Advion Cockroach Gel Bait - use this and put small amounts of bait in/under cabinets and other places where roaches are likely to gather, but be mindful that this stuff is toxic and needs to be kept out of reach of children and pets before and after application
2b. Advion Cockroach Bait Station - similar to most of the bait stations that you're probably used to seeing at Home Depot or Walmart
I'd recommend buying #1 and then either 2a or 2b, or buy all 3 if you've got big money.