Jim McKelvey is an American entrepreneur and co-founder of Square, a financial services and mobile payment company. He played a significant role in developing the company alongside Jack Dorsey, who is also known for co-founding Twitter. McKelvey's vision for Square was to make it easier for small businesses to accept credit card payments. In addition to his work with Square, McKelvey is an accomplished glass artist and has authored a book titled "The Innovation Stack." He is also involved in various philanthropic efforts, including supporting LaunchCode, an organization that helps people learn coding and find jobs in technology.