US-based mobile payments specialist Square has acquired New York design firm 80/20 which specialises in interface design.

US-based mobile payments specialist Square has acquired New York design firm 80/20, which specialises in interface design. Terms were undisclosed.

The latest acquisition comes after the San Francisco-based company closed a deal last month which brings the total investment in the company to $341m since it was founded in 2009. Square closed its series D round, raising $200m from investors including coffee shop Starbucks, private equity investor Suhail Rizvi, and Citi Ventures. The company is also backed by…