After working for a long time for a company you would expect to be the go to point in case of issues, be acknowledged and be promoted. Not at Criteo Barcelona, here you simply get ignored, nobody cares about your opinion if you are not in a management position (where you only get to if you are French of have French friends). If you intend to get promoted expect to be spending your after works at Barnabier on the "management table", the one where all the managers gather and only people who want to be promoted try to glue themselves on. If you try to get promoted like in any normal company (working hard and being there for your colleagues), you get forgotten - they will do their best to make you get pissed off so that you leave yourself and they don't have to pay the golden handshake fee.
To the juniors out there - stay home in your cold countries, do not be deceived by Criteo HR promising your amazing views and spamming their Linkedin profiles with it. It's all a nice cover for the mess that's actually happening inside and you will find out very soon after joining.