Senior DBA: High-Availability Databases & Time-Series

N.P.A.; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

N.P.A. is seeking an experienced Senior Database Administrator to join our Infrastructure team in London. You will own the database estate, manage MySQL, PostgreSQL and QuestDB deployments, and drive reliability, performance, and security across a diverse stack.

Responsibilities include upgrades, backups, monitoring, schema reviews, and collaboration with engineering to optimize data access and observability using Grafana dashboards. Experience in financial services is a plus.

Qualifications

• Proven hands-on experience as a DBA in production environments.
• Strong MySQL experience including replication and performance tuning.
• PostgreSQL experience and ability to work with QuestDB via the PostgreSQL wire protocol.
• Backup/restore strategies across MySQL and PostgreSQL.
• Experience with Grafana or similar observability dashboards.
• Familiarity with Redis and Elasticsearch administration.
• Linux-based server administration and CLI proficiency.
• Able to translate DB concepts to non-technical colleagues.

Responsibilities

• Administer, monitor, and maintain the database estate for high availability and performance.
• Plan and execute upgrades, patching, and migrations with minimal production disruption.
• Design and test backup/restore procedures with documented RPO/RTO.
• Monitor health, capacity, and performance; preempt bottlenecks.
• Collaborate with developers on schema changes and indexing strategies.
• Support querying optimization and access patterns across systems.
• Lead database incident escalation and root cause analysis.
• Integrate database queries with Grafana dashboards for metrics.

Skills

MySQL administration

PostgreSQL

QuestDB

Linux/Unix

SQL query optimization

Grafana monitoring

Collaboration & communication

Tools

Grafana

Dolt

Redis

Elasticsearch

Job description

N.P.A. is seeking an experienced Senior Database Administrator to join our Infrastructure team in London. You will own the database estate, manage MySQL, PostgreSQL and QuestDB deployments, and drive reliability, performance, and security across a diverse stack.

Responsibilities include upgrades, backups, monitoring, schema reviews, and collaboration with engineering to optimize data access and observability using Grafana dashboards. Experience in financial services is a plus.