As technical leads or architects it is very useful to know how to view, filter and analyse the costs of the application we build.

Actually I found Cost Explorer already very useful when I was working as a Senior Engineer because it provided lots of insights about the usage of our services, how much they costed and helped me in looking for possible optimisations. I found that being aware of costs belonged to the idea of ownership: I was not just responsible for the task of building an API and retrieve data from a DynamoTable, but to solve a business problem with the best tools and the least costs.