Mumbai, May 20 -- In the crowded and competitive world of Indian fintech, few names stand out quite like Flipkart co-founder Sachin Bansal, once the posterboy of India's startup boom. The 2005 IIT-Delhi graduate had quit his job at Amazon Web Services (AWS) in 2007 to start Flipkart with Binny Bansal from a modest apartment in Bengaluru. Five years later, it became India's first e-commerce company to hit a billion-dollar valuation, following a $150 million funding round led by South Africa's Naspers and ICONIQ Capital. By the time Bansal exited 11 years later, Flipkart was valued at $21 billion.

In May 2018, eight months after he fully exited Flipkart following Walmart's $16 billion acquisition of the e-commerce firm, Bansal launched his...