Startups do not have the cushion or luxury of time and resource compared to larger companies like Google. They usually have a specific tech. stack that they use

Startups do not have the cushion or luxury of time and resource compared to larger companies like Google. They usually have a specific tech. stack that they use especially in the early days. OTOH, Google etc. have engineers building things in every possible language. So there is no specific need to only hire say Python engineers.