[Software Architecture Patterns](https://learning.oreilly.com/library/view/software-architecture-patterns/9781491971437/ https://learning.oreilly.com/library/vi

[Software Architecture Patterns](https://learning.oreilly.com/library/view/software-architecture-patterns/9781491971437/ https://learning.oreilly.com/library/view/software-architect...) by Mark Richards answers your exact questions - goes into multi-tier, microservices, event-driven, etc. I'd highly recommend getting an O'Reilly membership. It gives you access to their entire catalog and you can just search whatever topic you're interested in and they'll let you read books on it. In terms of free resources, I like [Quastor](http://www.quastor.org/ http://www.quastor.org/). It's a newsletter that looks at all the big tech engineering blogs (Facebook Engineering, Uber Engineering, Lyft, etc.) and then sends a summary of the interesting ones published.