Pros
Huge company with a very developed business. Adevinta consist of multiple "marketplaces" or sub-brands which have independently existed for years. Currently in the process of consolidation which is causing some major changes. From a developer perspective this is a fun challenge, without the risk of losing your job. Quite a few teams are doing serious experimentation, introduction new solution while trying to integrate formerly independent companies.
Cons
You could get stuck with a legacy project. Or one of the marketplaces sold off for being unprofitable. Generally it's not a fun company. Very serious and corporate, sometimes stereotypically so. However not in a malicious way. There is no "work hard party hard" mentality, but everyone will respect you as a person and employee.