I've done this kind of work, and my first thought is that you're seriously underestimating the difficulty in getting data consolidated in one place at most companies. The barriers aren't technical, they are things like sprawling poorly designed databases, critical information found in disparate systems, and having to work with uncooperative DBAs who want to maintain their private empires. (You may also have smaller data volumes. That definitely helps performance!)

Your experience is in a young startup which hasn't accumulated layers of legacy cruft, with a reasonable schema, where you understand the data model, and you have good relations with key players you need to cooperate with. As a result you encountered none of the common problems that are endemic in more established companies.

I say this as warning, not discouragement. As you pursue this course, be warned that you will encounter those problems and they will take more time than you think. Be prepared for that, don't over promise, and when you arrive at a company pay attention to those possible roadblocks so that they don't catch you by surprise. Because forewarned is fore armed.