[dredmorbius]

Glassdoor can at least give you some insights.

I find media-bestowed "best places to work" awards tend to be greatly overstated.

Look for shops with people genuinely happy to do what they're doing, and sticking with it for a long time. Often out of the limelight. Attitude toward customers /end users is also key (it should be positive).

For a time Google seemed to have this, though I believe they're slipping.