As an early member of Square’s hardware team I lead the mechanical development of two generations of mobile card readers. Working closely with Square’s ID partners and internal electrical and firmware engineers, we brought both card readers to high-volume production very quickly.

Second generation Square card reader

Second generation Square card reader

Second generation Square card reader

Second generation Square card readers on the production line

Third generation Square card reader

Third generation Square card reader

Third generation Square card reader

Second and third generation Square card readers compared