Senior Database Administrator (5F15A8D)

Referment; Greater London; On-site; GBP 75,000 - 115,000; Full time

Job summary

Referment is seeking a skilled Database Administrator to own and operate the production database estate underpinning live trading and operational systems for a regulated European stock exchange operator. You will manage MySQL, PostgreSQL, QuestDB, Dolt, Redis and Elasticsearch; implement backups, upgrades, monitoring with Grafana, and work with developers on schema changes and performance tuning.

The role suits an experienced DBA in fast-paced, regulated environments who wants end-to-end

Qualifications

• Proven hands-on DBA experience in a fast-paced production environment, ideally in financial services or a regulated setting.
• Strong MySQL knowledge: installation, replication, tuning and user management.
• Strong PostgreSQL working knowledge (query planning, indexing, roles, connections).
• Backup and restore experience across MySQL and PostgreSQL, including point-in-time recovery.

Responsibilities

• Administer, monitor and maintain the production database estate supporting engineering and operations teams.
• Plan upgrades and migrations with minimal production disruption; design and test backup/restore against recovery objectives.
• Collaborate with developers on schema changes, query optimization and index design; manage database users and permissions.
• Integrate database metrics/logs into the monitoring stack (Grafana dashboards) and act as the escalation point for database issues.

Skills

DBA experience

MySQL

PostgreSQL

Time-series database

Linux CLI

Performance monitoring

Tools

Grafana

Redis

Elasticsearch

Dolt

QuestDB

Job description

Referment is working with a regulated European stock exchange operator that runs pan-European equities trading and licenses its own exchange technology. Its Infrastructure team is looking for a Database Administrator to take ownership of a production database estate that underpins live trading and operational systems.

The Role

You’ll be the primary resource administering, monitoring and maintaining the database estate that supports the Engineering and Operations teams. This is a hands‑on role across a varied stack: MySQL, PostgreSQL, a high‑performance time‑series database (QuestDB) used for market data and operational metrics, a version-controlled SQL database (Dolt), plus Redis and Elasticsearch. You’ll plan upgrades and migrations with minimal production disruption, design and routinely test backup and restore procedures against documented recovery objectives, and monitor health, capacity and performance to catch bottlenecks before they hit services.

You’ll also work closely with developers on schema-change reviews, query optimisation and index design, integrate database metrics and logs into the company's monitoring and alerting stack (including Grafana dashboards), and manage database users, roles and permissions on a least-privilege basis. You’ll act as the primary point of escalation for database issues across the business.

What We’re Looking For

• Proven hands‑on DBA experience in a fast‑paced production environment, ideally within financial services or another regulated, compliance‑driven setting.
• Strong MySQL knowledge — installation, configuration, replication, tuning and user management.
• Strong PostgreSQL working knowledge (query planning, indexing strategies, roles, connections). QuestDB experience is a plus but a solid PostgreSQL background and interest in time‑series workloads fits well since QuestDB speaks the PostgreSQL wire protocol.
• Practical backup and restore experience across MySQL and PostgreSQL, including point‑in‑time recovery.
• Comfortable in a Linux server environment with command‑line tooling.

Experience with Redis, Elasticsearch, Grafana or branching/version‑controlled databases would be advantageous, as would an understanding of audit and change‑control requirements.

This could suit an experienced DBA who enjoys owning a database estate end to end and wants to learn newer, specialist database technologies in a low‑latency trading environment.