Groupon announced today that it has acquired Obtiva, a Ruby on Rails software development firm from Groupon’s hometown of Chicago.

“We’ve been working side-by-side with our Obtiva colleagues since way back in 2009, when Groupon had a handful of engineers,” says Julie M. on the Groupon Blog. “Today, many of our 600W development teams have Obtivians on them (and several are led by Obtivians.) We decided to stop living in sin and tie the knot.”

“We’re constantly impressed by how capable Obtiva developers are and we’re really looking forward to expanding the team,” she adds, adding that Groupon is also looking to hire engineers.

Terms of the deal were not disclosed.

Apart from being considered the “fastest growing company ever,” Groupon has been very busy lately. In addition to recently filing for its IPO (which has been pushed back as the SEC reviews the company’s accounting practices), Groupon has also acquired Pelago, makers of the Whrrl check-in app, launched Groupon Now, partnered with Loopt and Foursquare for Groupon Now, and partnered with Expedia.