Large scale companies have much more complex websites, have graphic designers, front end coders, back end programmers, UX designers to build the websites, and multiple of each role because there is a lot of changes being made, tests being run, issues being fixed. There are also IT people managing the servers or AWS/Azure environment, managing databases, cybersecurity, etc. and people who monitor sites, run analytics, and such.

Then there are tons of sales people/account reps working with companies to manage profiles and set up job listings, tons of support people screening job postings, providing customer service to job seekers.

Then there are the roles all companies have — marketing departments, accounting department, HR, legal, IT and such…