How do I feel good about work behind the scenes that no one sees?

You keep the systems steady as a quiet service, content that the smooth running no one sees is your work. That is a mature and peaceful place to stand. You have stopped needing the day to notice you and started taking your satisfaction from the thing itself: it works, because you tend it. There is real freedom in that. When your worth does not depend on being seen, no one can withhold it from you. The applause economy has no hold on you. You do good work, the systems hold, and you know it. That knowledge is yours to keep, outage or not, thank-you or not. Guard that contentment by staying honest with yourself about what you do. At the end of the day, name one thing you kept running well. Not for anyone else, just to keep your own accounts true. A person who can find quiet pride in unseen work carries a steadiness most people never reach.