tl;dr: “In this blog post, we describe our journey of building an architecture from scratch which now enables us to process, generate, digitally sign, and e-mail out 1.5+ million PDF contract notes in about 25 minutes, incurring only negligible costs. We self-host all elements of this architecture relying on raw EC2 instances for compute and S3 for ephemeral storage. In addition, the concepts used for orchestration of this particular workflow can now be used for orchestrating many different kinds of distributed jobs within our infrastructure.”