10 years after the advent of Spring, Spring Boot shifted the paradigm from XML to Annotations. 10 years later, it is time to shift the paradigm again, this time toward functional programming. Spring Boot has been quietly adding functional APIs and DSLs since 2.0. These APIs deliver many benefits such as better performance and easier learning curve. In this talk, we will learn how to uncover these hidden gems in Spring Boot.

This talk is intended for novice and expert developers with some experience in Spring Boot or Kotlin. It may be of particular interest to platform engineers who are building frameworks on top of Spring Boot.
The talk focuses on the built-in functional APIs of Spring Boot, but will also introduce a library called Spring FunK, authored by the speaker, which adds some ergonomics and extensions to these APIs.
I gave a lightning talk version of this talk at CJUG, but a full talk has not been delivered yet.