As a platform engineer, I was responsible for building the core logistic platform on which every trip for every business line of Uber happened. We were a small team of ~50+ engineers owning over 100+ key integration points across 10s of microservices. We were supporting 2000+ internal engineers to use our platform. We used all different tools - wikis, docs, API docs etc. To scale better, we wrote tutorials, playbooks, how-tos, guides, runbooks etc. (called practical documentation).