David Mark Clements is a Principal Architect, technical author, public speaker and OSS creator specializing in Node.js and browser JavaScript.

David has been writing JavaScript since 1996 and has been working with, speaking and writing about Node.js since Node 0.4 (2011). He is the author of various open source projects. Of note among them is Pino, the fastest Node.js JSON logger available and 0x, a powerful profiling tool for Node.js.

David is the author of the first three editions of Node Cookbook, the technical lead and primary author of the official OpenJS Node.js Application Developer Certification (JSNAD) and OpenJS Node.js Services Developer Certification (JSNSD). He is also the author of the Node.js Application Development (LFW211) and Node.js Services Development (LFW212) courses plus a freely available course, Introduction to Node.js (https://www.edx.org/course/introduction-to-nodejs-2).