Senior DBA: Lead High-Perf MySQL/PostgreSQL & QuestDB

Aquis Exchange PLC; Greater London; Hybrid; GBP 70,000 - 95,000; Full time

Job summary

Aquis Exchange is seeking a Database Administrator to join the Infrastructure team and take ownership of our database estate. This hands-on role covers day-to-day administration, reliability, design and support across MySQL, Redis, QuestDB, Dolt and Elasticsearch.

The successful candidate will work closely with Engineering and Operations to ensure high-performing, well-managed databases that support our exchange technology products and Grafana dashboards.

Qualifications

• Proven hands-on DBA experience in fast-paced production environments.
• Strong MySQL and PostgreSQL administration, replication, tuning.
• Experience with QuestDB and data time-series workloads is highly desired.
• Familiarity with Dolt or Git-for-data workflows.
• Knowledge of backup/restore, DR, and RPO/RTO.
• Experience with Grafana dashboards integration.
• Linux server administration and scripting.

Responsibilities

• Administer, monitor, and maintain the database estate ensuring high availability.
• Plan upgrades, patching, and migrations with minimal disruption.
• Design and test backup/restore procedures with defined RPO/RTO.
• Monitor health, capacity, performance, and resolve bottlenecks.
• Review schema changes with developers for safety and performance.
• Support developers with query optimization and index design.
• Escalate DB issues and coordinate with Eng and Ops teams.
• Collaborate on integration between app code and databases.
• Write and optimize SQL for Grafana dashboards.
• Ensure metrics/logs integrated into monitoring/alerting.
• Manage DB users, roles, permissions per least privilege.
• Ensure configurations comply with security policies.

Skills

MySQL

PostgreSQL

QuestDB

Dolt

Redis

Elasticsearch

Grafana

Linux

Backup & recovery

Query optimization

Monitoring & alerting

Tools

QuestDB

Dolt

Grafana

Redis

Elasticsearch

MySQL

PostgreSQL

Job description

Aquis Exchange is seeking a Database Administrator to join the Infrastructure team and take ownership of our database estate. This hands-on role covers day-to-day administration, reliability, design and support across MySQL, Redis, QuestDB, Dolt and Elasticsearch.

The successful candidate will work closely with Engineering and Operations to ensure high-performing, well-managed databases that support our exchange technology products and Grafana dashboards.