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.

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, including ticket tracking systems and asynchronous communication tools
B.Sc. or M.Sc. in Computer Science, or equivalent work experience

Staff Database Administrator

Key skills