Rarely. In a team of 3-4 engineers who share the on-call responsibility, I think one of us gets paged every 3-4 months.

Normal shift is like every other day. Just go to work, do my job. Come home, eat, chill a bit and go to sleep.

It used to be more. The company started with three people three years ago (myself included). Now we're over 50. We have enough resources to fix and solve problems before they become real problems.