You're getting answers in child responses that while accurate are not necessarily answering the spirit of your question. In my personal opinion, you'll find what you're looking for by searching for a high growth Series A - B startup (I would recommend Seed but that's almost a different animal in terms of risk) with a technical product and strong technical founders + eng leadership.
When you're at a company at that stage that's doing well and has a lot of commercial runway ahead of it, the reality can often end up being that the golden age will last long enough for a very pleasant 4-6 year tenure if you so decide to stay at the company through its growth phase (which often takes it from a 50m-100m valuation to $1B+). Some of these companies will also make the leap from $1B+ to $10B+ or beyond (which makes the golden era at least as long as 6-10 years) and although nothing lasts forever, it can last long enough for you to find what you're looking for at least for a decently long period of time. This pertains to what other commenters have mentioned with regards to "making it golden" -- the golden era is what it is because everyone needs to make it golden and the company is too small for anyone who would dilute that for their own gain to do so without anyone noticing.
The challenge to this approach is that it requires being able to assess a company's commercial prospects as well as the quality of the company's founders, leadership and early team well enough to assess whether the company merely looks like a golden era company or whether it is actually the real deal -- something which even professional investors who target these kinds of companies struggle with. It is possible, but in my experience, it definitely took a couple of rounds of trial and error and getting burned a few times before my radar worked.
When you're at a company at that stage that's doing well and has a lot of commercial runway ahead of it, the reality can often end up being that the golden age will last long enough for a very pleasant 4-6 year tenure if you so decide to stay at the company through its growth phase (which often takes it from a 50m-100m valuation to $1B+). Some of these companies will also make the leap from $1B+ to $10B+ or beyond (which makes the golden era at least as long as 6-10 years) and although nothing lasts forever, it can last long enough for you to find what you're looking for at least for a decently long period of time. This pertains to what other commenters have mentioned with regards to "making it golden" -- the golden era is what it is because everyone needs to make it golden and the company is too small for anyone who would dilute that for their own gain to do so without anyone noticing.
The challenge to this approach is that it requires being able to assess a company's commercial prospects as well as the quality of the company's founders, leadership and early team well enough to assess whether the company merely looks like a golden era company or whether it is actually the real deal -- something which even professional investors who target these kinds of companies struggle with. It is possible, but in my experience, it definitely took a couple of rounds of trial and error and getting burned a few times before my radar worked.