Design Patterns

No book has influenced the software development as design patterns from the Gang of Four (Gamma et al.)

Enterprise Integration Pattern

The standard for the development a Message Oriented Middleware is to apply the EIP patterns:
http://www.eaipatterns.com/

HTTP REST/JSON

and who wants to build an standalone service might choose the common HTTP-REST JSON approach for communication with the outer world. Stefan Tilkov describes this  in his book:
REST and HTTP