08/14/2026 updated
KK
100 % available
Senior MySQL & MariaDB DBRE | HA Architect & Consultant | Galera, Replication, ProxySQL
Portugal
Only remote
MSc, Cracow University of Technology (Politechnika Krakowska), 2000–2005About me
Senior MySQL and MariaDB DBRE and high-availability consultant. 21 years operating production databases, including 14 years of independent consulting through DB-Ex. I design and run resilient MySQL/MariaDB systems: Galera, InnoDB Cluster, replication, ProxySQL/MaxScale, performance audits, DR.
Shard (Database Architecture)Disaster RecoveryPython (Programming Language)MariaDBMongoDBMySQLPerformance TuningHigh Availability ClustersAWS AuroraDatabase ReplicationTerraform
Senior MySQL and MariaDB DBRE and high-availability consultant. 21 years operating production databases, including 14 years of independent consulting through DB-Ex. Skills: MySQL, MariaDB, Galera Cluster, InnoDB Cluster, Replication, High Availability, ProxySQL, MaxScale, Performance Tuning, Amazon Aurora, AWS, MongoDB, MongoDB Atlas, Terraform, Python, ClusterControl, Disaster Recovery, Sharding.
Experience
Professional experience10+ years
Freelancer since2012
Languages
EnglishFluentPolishNative speaker
Project history
700+ Amazon Aurora clusters and MongoDB Atlas; designed sharding; Aurora major-version upgrades on 30+ clusters; MongoDB performance debugging; Jira-based alerting; schema and query work with developers. Remote, Madeira.
Independent consulting: MySQL, MariaDB, Galera, InnoDB Cluster; performance audits; HA/replication/failover/DR; audit → PoC → production → ops. Remote.
Led global support. High availability with MySQL, MariaDB, Galera, ProxySQL, MaxScale, MongoDB; pre-sales and PoCs; webinars and blogs; Percona Live Europe speaker; ClusterControl. Contract, remote.