How We Built a Kubernetes-based Platform and Tried Not to Slip into "Kuber with Authentication"

It is not a difficult task to build a Kubernetes cluster and add authentication to it, but will such a cluster help your business? What should a teamleader who builds a platform in a large bank be prepared for? How the task was decomposed and how they tried to "sit on all the chairs": to help the business in transformation, to carry out import substitution, not to burn out from bureaucracy, to create a convenient product.