Merrymake is a serverless and infraless computing platform for running event-driven back ends. Serverless frees developers from provisioning and maintaining servers. Merrymake's platform scales to zero, has an average cascading-cold start time below 200 milliseconds, has no quotas and no limits, and you only pay for the milliseconds your code runs. The platform supports multiple programming languages, than have not been changed to achieve the cold-start time, and comes with a guided CLI with templates, for fast development and maintenance. It being infraless, it abstracts away many tools used for service-to-service communication behind a message-passing interface, enabling developers to focus on their code. CI/CD is also built in, so you can deploy with a single Git push. The platform is built with a flexible and robust indirect communication architecture, that brings a number of standardized solutions to traditionally difficult problems. As examples, Merrymake offers fan-out/fan-in, throttling, zero-downtime deployment (aka rolling updates), caching, and streaming, with a single command. The architecture further enables risk-free testing in Production, and makes service refactoring easy.