London Senior DBA: PostgreSQL & MySQL, Performance & HA

Hunter Bond; Greater London; On-site; GBP 81,000 - 99,000; Full time

Job summary

Hunter Bond is seeking an experienced DBA to join a growing FinTech in London. You will own the expansive database estate, covering MySQL and PostgreSQL (or QuestDB), with day-to-day administration, reliability, design and support.

You will write complex SQL, optimise queries, design backups, monitor health and performance, and collaborate with developers on integrations and dashboards (Grafana).

Qualifications

• Hands-on DBA experience in production environments.
• Strong knowledge of MySQL and PostgreSQL, with backup and restore strategies.
• Experience with QuestDB is a plus.
• Familiarity with Grafana and Observability tooling.
• Comfortable in Linux environments and the CLI.
• Ability to write complex SQL and optimize queries.
• Knowledge of indexing, query planning, and access controls.

Responsibilities

• Own the database estate, including administration, monitoring, HA, and reliability.
• Perform upgrades, patching, and version migrations.
• Design backups, restores, and relevant documentation.
• Monitor health, capacity, and performance; identify bottlenecks.
• Review schema changes with developers.
• Collaborate on integrations and data pipelines.
• Write and optimise SQL queries for dashboards and reporting (Grafana).
• Manage permissions and privileges.

Skills

Linux CLI

SQL scripting

Performance tuning

Query optimisation

Team collaboration

Tools

MySQL

PostgreSQL

QuestDB

Grafana

Redis

Elastic

Dolt

Job description

Hunter Bond is seeking an experienced DBA to join a growing FinTech in London. You will own the expansive database estate, covering MySQL and PostgreSQL (or QuestDB), with day-to-day administration, reliability, design and support.

You will write complex SQL, optimise queries, design backups, monitor health and performance, and collaborate with developers on integrations and dashboards (Grafana).