Jilles van Gurp
Senior backend engineer and Elasticsearch specialist that sometimes doubles as a CTO or product architect. I've also built stuff with the Stellar blockchain and can help companies with any of these things.
I can work with many tech stacks. Currently I favor Kotlin (with Spring Boot, Ktor, or similar) on the backend but I've also used python, go, node.js (with typescript), and a few other tech stacks.
I also maintain the Kotlin OSS clients for Elasticsearch and Stellar.