February 26th, 2015

Static code analysis: do it the right way

At Criteo, we have a team inside the R&D department dedicated to improving the build process. Our goal is to allow developers to push their code in production quickly and safely. We think that one way to achieve this is to provide early feedback to developers, during the development process, so that they feel confident that they are not going to break something. As adventurous as we are, we don’t feel production is an appropriate place to find out we might have goofed. We want to give feedback on code commits before they go through the integration pipeline.

February 6th, 2015

The buddy initiative: Your first hour at Criteo R&D

So, you’ve been hired by Criteo R&D, congratulations ! Now, what will your first hour in the Paris office look like ?

Well, get out of the metro, walk up the street a bit and find your way into the lobby. Ask the receptionist to ping your buddy. Wait, my WHAT ? Surely you mean my manager, my recruiter or some HR person ? Nope, I said “your buddy”. It’s someone from another R&D department  that will greet you when you arrive, show you around the important parts of the building, tell you the basic things you need to know and then deliver you into the waiting arms of your welcoming team. We thought “hey, welcome, I’m your buddy” is a nicer greeting than “hey, welcome, I’m your manager”. Dunno why but it’s true. Perhaps it’s the way it sounds ? Buddy. Rhymes with friendly.

January 15th, 2015

Great Engineers and Crap CVs

The Criteo R&D recruitment team receives a few applicant CVs, not as many as we would like as we are not that well known (yet) but far more hires come from headhunted candidates and referrals. We are used to working with LinkedIn profiles, github contributions, blogs, as well as notes from our discussions about what you do and want to do. I have been known to present only the sparse LinkedIn and github profiles instead of the available (and horrible) CV kindly sent by the great engineer I have been hunting for months. And our CV reviewers are more interested in seeing your code than what school you went to, or that you like cooking [Hiring Manager chiming in: SAY WHAAT ? Of course you get bonus points if you like cooking ! We just love home-baked cookies. Now if you “like hiking, reading and going to the movies”, then we couldn’t care less indeed, stop wasting pixels].

October 10th, 2014

Criteo Announces the Mo PB Mo Problems World Tour!

That’s right, Criteo R&D is on its way to NYC for Hadoop World 2014 and is bringing its Mo  PB Mo Problems World Tour with it! No, this isn’t a PR / marketing campaign to tell the world how much “big data” we have and why we’re so cutting edge that you should become a client immediately (which is all true, btw). This is our Paris – Bay Area recruitment tour with a (sole) stop at the 2014 NYC Hadoop World conference!

If you hadn’t heard, Criteo has a massive infrastructure and massively interesting engineering problems to tackle and so we’re hiring massively :).

September 25th, 2014

Kaggle contest dataset is now available for academic use!

We have launched a Kaggle challenge on CTR prediction 3 months ago.
Large participation, close race …
…and the winner will officially be announced next week!

Some updates on the contest have been presented at the Paris Machine Learning Meetup. Please visit the site for video of the meetup and slides.
We have updated the curves representing the evolution of the contest over time:


Meanwhile the dataset is now available for academic use.
This one is pretty big, have a lot of fun with it.

JB Tien.