Why do start ups use Ruby as their primary backend stack?
and then hire people to change it to something like Java. like Stripe and Flexport Does it really take that longer to develop in Java or something else?
Yes
Even Twitter did the same. It’s easy/fast to go to market and prototype rapidly in a competitive world. And then when shit hits fan they revert to time tested options.
As others have said, it’s easy to get a prototype up and running(especially with scaffolding) and get interest from investors and customers.
Because at some point the companies realize they have to grow up and use real solutions
Kids didn't know better at first
GitHub uses RoR afaik. So did Shopify
Twitch did the same.
I think it’s a byproduct of when these companies started. GitHub, Stripe, and Twitter all started building these applications ~10 years ago when Ruby was really popular. That’s changed over time and they’ve scaled the language and frameworks with it (GitHub pushing Rails forward, Stripe with Sorbet, etc). At some point though, there’s a desire to move to different languages for hiring, types, etc.
Facebook went the other way. They kept the language (PHP), changing the underlying implementations and evolved the language incrementally to allow for more efficiency and stability.
Because “efficiency” and “stability” come to mind when I think of Facebook lol
May be stability is a wrong word, but predictability of the language. As for efficiency, what is your metric?
I think it’s for TTM? Also I don’t think it’s that common anymore - it’s a new information for me.