Mark Fiorentino is a former Stripe operator who spent five years across sales support, credit underwriting, finance, corporate development and investor relations before joining Index Ventures, giving him detailed operator-level understanding of payments, risk, and fintech unit economics. He focuses on picks-and-shovels fintech infrastructure that rides on top of large secular shifts, framing opportunities as ETFs on ecosystems rather than standalone point solutions, with particular conviction on Latin American fintech infrastructure like card issuing and cross-border payment rails. Mark Fiorentino is a former Stripe operator who spent five years across sales support, credit underwriting, finance, corporate development and investor relations before joining Index Ventures, giving him detailed operator-level understanding of payments, risk, and fintech unit economics. He focuses on picks-and-shovels fintech infrastructure that rides on top of large secular shifts, framing opportunities as ETFs on ecosystems rather than standalone point solutions, with particular conviction on Latin American fintech infrastructure like card issuing and cross-border payment rails.