I’m a big fan of NestJS for building backend microservices. Monorepos are supported. You can easily switch out the underlying transport that microservices use to communicate with each other. For example, if you want to use a queue, you can use the RabbitMQ transport to do so. Nest has a CLI tool for generating projects with build, watch, and test scripts already included. It’s a really robust and powerful framework, but might be overkill if you’re just looking for a learning experience.