Checkr’s mission is to build a fairer future by improving understanding of the past. We are based in San Francisco and Denver. We have found some limitations in only using JSON-based RESTful APIs to communicate between services. Moving to gRPC has allowed us to better document interfaces and enforce stronger boundaries between services. In this session we will share the lessons we have learned while incorporating gRPC into our application, walkthrough setting up a new rails project with gRPC support, and how we plan to expand our usage of gRPC in the future.