[xer]

At Annsec we are all out on serverless infrastructure and use Lambdas and Step functions in two development teams on a single backlog. Extensibility of a well written lambda is fenomenal. For instance we have higher abstraction lambdas for moving data. We make them handle several input events and to the greatest extent as pure as possible. Composing these lambdas later in Step functions is true developer joy. We unit test them locally and for E2E-tests we have a full clone of our environment. In total we build and manage around 40 lambdas and 10 step functions. Monitoring for failure is conducted using Cloudwatch alarms, Ops Genie and Slack bots. Never been an issue. In our setup we are aiming for an infrastructure that is immutable and cryptological verifiable. It turned out to be bit of a challenge. :)