Senior System Administrator
markham, york region, Canada • Posted June 01, 2026
Job Type:
Full-time
Location:
markham, york region
Posted:
June 01, 2026
Category:
Other-General
Application Deadline:
July 11, 2026
Role Description
Job Summary
We are seeking an experienced and highly skilled Senior PostgreSQL System Administrator with 5 to 7 years of hands‑on experience managing large‑scale PostgreSQL environments. The ideal candidate will be responsible for database performance, optimization, scalability, and security across mission‑critical systems, mentor junior DBAs, and support architectural decisions to ensure high availability and business continuity.
Key Responsibilities
- Lead the installation, configuration, and administration of PostgreSQL database servers across production and non‑production environments.
- Design and implement high availability (HA), disaster recovery (DR), and replication solutions.
- Monitor and analyze database performance, identify bottlenecks, and fine‑tune SQL queries and database configurations.
- Perform database upgrades, patching, and migrations with minimal downtime.
- Implement robust backup and...
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