You should check out beakerx: https://github.com/twosigma/beakerx https://github.com/twosigma/beakerx It'll give you Java, Scala, Kotlin, and Groovy kernels.

You should check out beakerx: https://github.com/twosigma/beakerx https://github.com/twosigma/beakerx It'll give you Java, Scala, Kotlin, and Groovy kernels. I would particularly suggest the Groovy kernels (and Groovy in general) for munging around data with Java. I actually prefer it to pandas/Python except for the less rich ecosystem around machine learning / stats / deep learning. NB: For the SPA-like side, have a look at Micronaut which will work nicely with Groovy / Kotlin / Java and then you don't need Node, just interface Micronaut directly with your React code.