In my 8 or so jobs, I’ve always worked at technology-driven companies, even if some of those roles were consulting to other companies.
One safe-ish bet is to work for companies that make software — i.e. technology is the product, not a means of delivery. While that doesn’t guarantee that the company is truly a technology company, it does mean you are one of the “first class citizens” at the company, and so it’s important for the business to be technology-driven. As a result, there is a good chance technology is a core value. Even if it’s not when you are joining at a senior level, it’s possible (if hard) to get it there.
You talk about how startups are holistic by necessity. One open question I have is whether as the company grows, whether (also by necessity) it has to become business-driven, and so the technology side becomes more prescriptive. You are post-product-market fit and so it’s more about optimizing and expanding as opposed to (as much) innovation, which makes sense to be more holistic. Another reason is that when you have hundreds and thousands of people, you need more process and role definition to give clarity. You also have much more at stake, so an hour of downtime costs more than it did when you had 10 employees, and thus it’s smart to invest more in processes to prevent it.
Maybe that’s what you are trying to get at — looking for companies that “made it,” to scale and are successful businesses, but are still technology-driven at their core?