Jean-François is a System/Infrastructure Engineer and MySQL Expert. He recently joined MessageBird, an IT telco startup in Amsterdam, with the mission of scaling the MySQL infrastructure. Before that, J-F worked on growing the Booking.com MySQL and MariaDB installations including dealing with replication bottlenecks (he also works on many other non-MySQL related projects that are less relevant here). Some of his latest projects are making Parallel Replication run faster and promoting Binlog Servers. He also has a good understanding of replication in general and a respectable understanding of InnoDB, MySQL, Linux and TCP/IP. Before Booking.com, he worked as a System/Network/Storage Administrator in a Linux/VMWare environment, as an Architect for a Mobile Services Provider, and as a C and Java Programmer in an IT Service Company. Even before that, when he was learning computer science, Jeff studied cache consistency in distributed systems and network group communication protocols.