The app Seller focuses constantly provide relevant content to the day to day business, leaders and sales teams and customer service. William Caldas, graduated in Social Communication, Bachelor of Public Relations has extension in Knowledge Management from Fundação Getúlio Vargas and extent Disneylogia and Positive Psychology by Seeds Of Dreams Institute and Disney Institute, Orlando USA 2013. He was elected in 2009 by Editora 3C Rio de Janeiro, as one of 30 leading experts in motivation of Brazil. The app will bring your users tips and important information on sales issues, customer service, leadership, and team motivation.

He lectured to KLA, Pearson, Post Office, Serasa Experian, Vivo, Grupo Pão de Açúcar, General Motors, Coca Cola, Cyrella, Sebrae, Pythagoras, Fiemg, CNC National Confederation of Commerce, CDLs, Federations of Commerce and Trade Associations in several cities among other companies in the Brazilian market.