• 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 - taking part in incident response, diagnosis and follow-up on system outages or alerts across Wikimedia’s production infrastructure.