Medina Capital, the Miami private equity firm that invests in high-growth companies, led a $35 million Series C investment round in Booker, a full-service digital platform for service commerce, the companies announced Tuesday. The round of funding also includes a strategic investment by First Data and investment firms Jump Capital and Signal Peak Ventures, as well as early investors including Bain Capital Ventures, Revolution Ventures, TDF Ventures and Grotech Ventures.