Strongly disagree on Django, unless it is something you are already at a senior level at pre-AI. I've had the displeasure of cleaning up multiple Django backends lately, and the combination of standard fail-open, weak validation, mediocre ORM, and bad testing frameworks lead to issues I've simply not had when managing agents doing Go, Java or Rust.

Go probably wins as a matter of trade-offs for pure productivity (speed, reliability, ease of refactor), but Java Spring Boot works excellently if you're willing to take the plunge (pretty steep learning curve), and the ecosystem really lends itself to building more complex stuff that holds for a while.

Rust is fun because it is an amazing multi-faceted language where agents will constantly deliver you working yet surprising implementations you'll have to quintuple check, and sometimes spend and afternoon trying to grok. The outcome is also perfectly usable, fast, and reliable, but developer velocity is lower.