Senior Database Administrator

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Requirements:

• Advanced level of experience with MariaDB or MySQL database administration and replication topologies at scale.
• Proficiency in SQL.
• Experience with debugging query performance and schema design.
• Experience with MySQL high availability and replication management tooling.
• Knowledge of Linux and IO/data storage concepts, internals and troubleshooting.
• Experience with managing remotely both bare-metal servers and virtualized environments.
• 5+ years experience in a hands-on DBA role as part of a team.
• Experience with high traffic and highly available website architectures and operations.
• Strong English language skills.
• 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.

Responsibilities:

• Implementation, maintenance and troubleshooting of relational database systems in production and staging environments.
• Handling database version upgrades, testing and working with upstream on bug identification and resolution.
• Configuring replication, designing schema optimizations and running schema changes.
• Monitoring, debugging and improving query performance.
• Improving observability (alerting, metrics, monitoring) of database infrastructure.
• Multi-datacenter replication topology design, capacity and infrastructure planning.
• Taking part in incident response, diagnosis and follow-up on system outages or alerts across Wikimedia’s production infrastructure and participating in an on call rotation.