Connectifier, a company that helps place candidates into new jobs, has been using Datadog to optimize its infrastructure and troubleshoot performance issues. When the company's application began slowing down due to an issue with MongoDB's WiredTiger database, they used Datadog to identify the problem and implement a fix. The open-source model of Datadog allowed Connectifier to contribute directly to its development by submitting pull requests and receiving prompt feedback from the Datadog team. Overall, the company found Datadog to be a valuable tool for monitoring and analyzing their infrastructure's performance.