Kræn is a Senior Software Engineer at MongoDB, building developer tools, such as Compass and the mongosh CLI. Previously contributing primarily to Atlas Device SDKs (formerly Realm) and its related packages (combined ~60K weekly downloads on NPM). He holds a masters degree in Computer Science from the Technical University of Denmark and has built and maintained multiple TypeScript libraries and React apps. Kræn lives 30 minutes west of Copenhagen, with his wife, their 6-yo twin girls and 2-yo baby girl.