 SAN FRANCISCO--BUSINESS WIRE--Upwork NASDAQ: UPWK, the worlds work marketplace that connects businesses with independent talent, today announced that Saty Bahadur has joined the company as its new chief technology officer. Bahadur joins Upwork from Amazon, where he spent the last four years as a general manager, most recently leading the team responsible for preventing worldwide fraud and abuse on Amazon.com. Previously, he led the Alexa artificial intelligence group and built the platform 