Jeanfrançois has been working in software engineering for the last 18 years. He studied pure mathematics and worked for a Canadian research centre, doing mathematical modeling in C++ until someone introduced him to a new language called Java. He never stopped using it. Jeanfrançois worked for Sun Microsystems for almost 10 years where he first participated in the Apache Tomcat works donated by Sun, adding XML support and an improved security mechanism. He was also an active member of the Jakarta Digester project. He then wrote one of the first NIO frameworks, Grizzly, which was originally targeted to replace the Tomcat Coyote Connector in GlassFish, but evolved into its own framework and is now used by thousands of applications. Jeanfrançois also developed the Grizzly Comet Framework, which was an early way to implement asynchronous web applications. He then started the Atmosphere Framework, which brings portability across Servlet container and allows the creation of WebSocket and Comet applications. He is still leading and actively developing the framework.