The customer is a cloud provider that offers large-scale Database-as-a-Service for multiple database products like PostgreSQL, MongoDB, and MSSQL. The customer databases are run across a large number of different Kubernetes clusters. I was part of the engineering team that created the Kubernetes operators, written in Go, which manage every database product's infrastructure. We developed the existing unreliable operators from the ground up, defining a new, reliable, and extensible architecture, as well as thorough quality assurance with various testing levels from unit to end-to-end tests, thereby increasing maintainability and robustness.

As part of a great team that develops and operates a complex mircoservice system for customer subscription management. We faced stringent requirements for resilience and throughput to deliver an excellent experience to millions of customers.