Staff Database Administrator

Advanced level of experience with MariaDB or MySQL database administration as the primary production database, including complex replication topologies at scale Advanced proficiency in SQL and query/schema optimization Experience with debugging query performance and schema design Experience with high traffic and highly available website architectures and operations Experience with MySQL high availability and replication management tooling Knowledge of Linux and IO/data storage concepts, internals and troubleshooting 6+ years experience in a hands-on DBA role as part of a team Solid English language skills Ability to travel 1-2 times a year Ability to work independently in a fast paced environment, as an effective part of a globally distributed team B.Sc. or M.Sc. in Computer Science, or equivalent work experience

Ensure the health and performance of Wikimedia’s production relational database systems, and the structural integrity of its data. Deploy, maintain and troubleshoot relational database systems in production, development and staging environments Design, implement, manage and automate (multi-site) replication topologies Consult in the design of database schemas and queries, and implement/oversee database schema changes in production Monitor, debug and optimize database query performance Improve observability (alerting, metrics, monitoring) of database infrastructure Capacity and infrastructure planning, including (on-prem) bare-metal hardware Contribute to the automation of common database management workflows Enable the reliable generation and timely restoration of database backups Maintain relationships with the MariaDB upstream projects/organizations, and working with upstream developers on bug identification and resolution Participate in a 24/7 on-call rotation shared across the team