Nubank uses Cognitect’s programming and database tools, Wible said. The firms began working together in 2014. Cognitect has about 20 employees, who will join Nubank. Chief technology officer Rich Hickey and President Stuart Halloway will also become Nubank partners. “As we grew, we felt we lacked the mentors to guide our more-senior engineers, which we will now have after the acquisition,” Wible said. Cognitect’s Clojure programming language will remain open source, he said, and customers of the firm’s Datomic database won’t see disruptions. Cognitect is Nubank’s second acquisition. In January, the firm purchased Plataformatec, a Brazilian software company. Nubank has a workforce of more than 2,700, with about 600 engineers.

https://www.bloomberg.com/news/articles/2020-07-23/fintech-powerhouse-nubank-buys-u-s-software-firm-cognitect?sref=EcccZSTc