Of course Accenture outsources stuff.

They're based in Ireland. There's like 42k software developers in the entire country* and Accenture has 779k staff**, so they had to hire people in foreign places like Norway and the USA.

* OK, it says "Computer Programming": https://enterprise.gov.ie/en/publications/publication-files/...

** and I have no idea how many of them do "Computer Programming"