Hi there! Sorry for the super-delayed followup.
We’re currently building on an internally-managed Kubernetes cluster, and we have multiple pods housing our API servers, which are all written in Elixir. The client-facing code executes on JS in the Browser + on Node.js workers and hits the API via intra-cluster RPC calls. We run with 8-12 pods on normal daily traffic, spiking to dozens during sale days. For the most part the servers themselves are somewhat-stateless, and we use MySQL as our primary data store. We also use message queues backed by Redis. The legacy system’s PHP codebase and Memcache sometimes access but are never accessed by the API.
