[chintler]

I have been in the same position, and here's what my experience has been(sample size 1)

Standardize the stack. Use one stack, one set of tooling, one set of practices, and libraries that are very well known and has decent community support. As you start delivering code, the knowledge builds upon itself.

For example, I pretty much standardized REST API, microservices, Python, Flask, Redis, MongoDB, Nginx for the first 2-3 years. As teammates joined in, they were encouraged to reuse code. Slowly, as more senior engineers started working in the team, they brought their own processes, and consequently the organization became more flexible and robust.