The modern web front end is run by a web team that pushes features as fast as it can deliver them.
We have an internal system tools team, which automates all the tedious processes possible.
A lot of trust is put into our big data team, utilizing data from a myriad of sources to find which pages are the most relevant for users. The related machine learning team uses even more data, to provide decisions about individual listings which help us provide the besta data for users, and gives them additional information.
Our backend team owns the critical infrastructure which collects, parses and searches listings, while having to provide massive scaling to do this for hundreds of millions of listings in real time.
Our quality team does QA, constantly tweak banner ads for maximum performance, owns all language related tasks, provides critical input on business logic, and monitors relevant parts of the web for us.
Together we deliver a service we are proud of.