I applied to the Paris office. The interview process is composed of the following steps: - 30min phone call with HR - 1h phone call with the recruiting manager - you have to do a "SE hiring exercise" that takes about 14-15h to complete. It makes you use Datadog's solution and doing some troubleshooting for clients. - 3h30 of regular interviews to assess your cultural fit, technical knowledge and coding skills. You have to complete some basic coding exercises. I do not live in Paris, so we did it online using Zoom. The recruiting sourcer called me a few days after the last step of the recruitment process to tell me that I successfully went through all steps, and that she needed a few more days to confirm my starting date before sending me a contract. A week goes by, and I haven't heard from her. I emailed her to ask for an update, and she called me back telling me that they finally went with another candidate. I couldn't get any real explanations feedback. I find it unprofessional not to have kept me informed, and to not have received any proper feedback. After about +20h spent doing exercises and interviews, you don't get any feedback! Unbelievable -- Update After emailing directly my interviewers, I could finally get some proper feedback. I encourage you to do so and bypass the recruiting sourcer.