Database architect (database design proposal, performance tuning - MySQL/Percona/MariaDB, HBase, Hive, Impala)
Hadoop ecosystem expert
Relational databases clustering/sharding
InnoDB/XtraDB/MyISAM performance tuning
HBase - architecture, performance tuning, real-time data warehousing
SolrCloud - architecture, performacne tuning, data-sharding
Hive, Impala - SQL friendly Hadoop systems
Leading databases training/tutorial and consultation
Java - high performance plugins for Hadoop and Hbase
Knowledge and practical experience with MongoDB, Redis, PostgreSQL
Java, C++ developer
SQL, PL/SQL