For example one company was a media company that you've probably heard of. For their next growth phase, they have two separate legacy PHP systems that they need to integrate and they need to modernize their front end. Their development team isn't capable of doing that project. They've been spinning their wheels for a few years. I thought it might be fun to go in to that company, understand their systems, architect the new solution, lead/coach their team through building it. I could also help them set up automated build systems, introduce React and coach them through learning that. Maybe help them hire some more modern developers as well. That kind of thing.
I've got a lot of experience doing complex architecture and also training up junior developers, so it sounds like projects like that could play to my strengths.