Paulo Arruda presented on designing a simple serverless/FaaS architecture using Redis. The key aspects discussed were: 1) Using Redis to store metadata about workspaces and functions. 2) Implementing a reliable queue pattern with Redis to distribute function execution across multiple "Runners" and decouple the HTTP server from code execution. 3) When a request comes in, the HTTP server pushes the job onto an input queue in Redis. Runners then pull jobs off the queue and execute the function code.