Finix Payments Inc. said it raised $35 million in Series B funding led by Sequoia Capital to help the payments infrastructure startup speed its product development and expand its engineering teams. 

The funding round was backed by Acrew Capital, Bain Capital Ventures and new investors Activant Capital and Inspired Capital. 

Finix helps provide software developers a third option beyond building their own payments infrastructure in-house or outsourcing the entire process. Finix helps these companies manage and monetise their own payments system. 

"We're only just beginning to see what amazing experiences can be built when companies begin designing payments deeply into their user experience rather than treating it as a bolt-on," Richie Serna, chief executive officer at Finix, said in a company release. "Every day, our customers prove to us they are able to build superior product experiences that delight both customers and merchants, when they have full control over their payment stacks."

Since its founding in 2015, the company has built a diverse base of customers, including Lightspeed POS, a retail point-of-sale firm, Kabbage, a small business cash flow platform and Passport Labs Inc., a mobility management platform.