Nubank purchased Cognitect (the consulting company behind Clojure) in 2020, as well as Platformatec (employers of Jose Valim); the latter was for access to Platformatec's project management expertise (see https://building.nubank.com.br/tech-perspectives-behind-nuba... there is no Elixir code running at Nubank AFAIK.
There is Python on the "other side" of the ETL pipeline, but everything user-facing is (again AFAIK) Clojure on the backend and TypeScript in the Android and iOS apps.
There is Python on the "other side" of the ETL pipeline, but everything user-facing is (again AFAIK) Clojure on the backend and TypeScript in the Android and iOS apps.