JeanFrancois is a contributor to the extremely popular Apache Tomcat web server and created the GlassFish web container. He authored project Grizzlyand the Glassfish v3 micro-kernel, a framework for creating NIO and HTTP applications. JeanFrancois led the GlassFish Application Server project including its migration to open-source. Grizzly was one of the first production ajax push+comet frameworks, the technology which brought “chat” to the web.
At Ning and Sonatype he went on to author the Asynchronous HTTP Client (AHC), a client library for asynchronous java remote event processing. He conceived of Atmosphere, a framework for real-time communications through HTTP streaming, Comet, and WebSockets and has been leading it ever since. He was an active member for NIO.2 and Servlet 3.0 JSP committee.