Knowledge and interests: Java (and the JVM ecosystem in general). Programming, languages, techniques, idioms, etcetera. Type systems. Declarative languages. Concurrency. GUI toolkit architecture.

Focusing on full stack, single-page web apps, preferably avoiding seven-framework pile-ups.

Special Itch/es: feedback (e.g. nice error messages instead of bad ones); availability of ways to debug problems in components, plugins and applications. Project source tree organization by features, abstractions or concepts (instead of the often seen layered one). Etc, etc.