Sergei was a MySQL developer since 1998. From 1999 to 2009 in MySQL AB, Sun, then in Monty Program AB and SkySQL/MariaDB Corporation on MariaDB. During these years he has touched almost every part of the server. To list a few projects – fulltext search, XA, HANDLER, precision math library, parallel repair and bulk inserts in MyISAM, indexes in MERGE, pluggable authentication, password validation, encryption. Sergei is a primary architect of the plugin API and an author of the “MySQL 5.1 Plugin Development” book. Sergei was the MySQL Security Coordinator during all his time in MySQL AB and Sun Microsystems, and now is doing the same in MariaDB.