Well they started off in Boston and were MIT/Harvard grad students. And the backend was a DARPA project. So not really Brooklyn at heart, though some millennial New Yorkers pretended it was. They even had a personality trait for how much a user reminded them of Harvard girls. Like many "only in New York!" things it was really something that had mass appeal and gave a sense of quirkiness that was actually widespread in our generation.
"New Yorkers will say 'only in New York!' and it's the most normal shit ever."
Not sure if it was DARPA, but the web server used Tame, a custom event-driven framework at a time where the thread vs. events debate was all the rage in the academic community. (I did a PhD on the topic and that's how I learned about Ok Cupid!)
"New Yorkers will say 'only in New York!' and it's the most normal shit ever."