Nice! Talking of JSON schemas and validating JSON documents against schemas, for Java, I wrote unify-jdocs where I do not use JSON schemas but still do validations (I found them unwieldy to use and was looking for something simpler). You can find details here -> https://github.com/americanexpress/unify-jdocs. Also, no POJOs / model classes, just reading and writing JSON paths in a single line of code. It's helped us tremendously in managing complexity in a very large internal project. I am hoping it helps others.