A few books that are relevant to your situation:

  * High Growth Handbook - covering the operations and biz side
  * The DevOps Handbook - developer effectiveness in larger orgs with examples
  * Monolith to Microservices - how to execute the transition
  * Team Topologies - how to organize teams for effectiveness

My site has notes for these books and more: https://www.briansnotes.io/books/