Maybe it is „very” professional, so he is part of one of hundreds of teams and he is creating micro parts of big system and with such setup he is easily hiding in ocean of very low performing people. In many big setups there are so-called microservices that in reality are picoservices doing function of 1-2 method and 1-2 tables in db.

Either way - the setup looks nice and is one of very few that really shows how to make things work. A lot of people say about 5-10x improvements not showing even the prompts, because probably they made some 2 model CRUD that probably can be already made with 20 lines of code in Django.