Senior Database Engineer (PostgreSQL 12+, MySQL 8+, High Availability) for NATO with security clearance

Wlgroup; Brussel Hoofdstad; Sur place; EUR 70 000 - 100 000; Plein temps

Résumé du poste

Wlgroup in Brussels is seeking a production DBA skilled in PostgreSQL and MySQL to run on prem, across development, test and live. You will optimize queries, manage replication, and plan capacity to prevent capacity issues.

Responsibilities include provisioning, backup and recovery, monitoring, and post-incident root-cause analysis to prevent recurrence. On-site, full-time in Brussels.

Qualifications

• Solid production experience on PostgreSQL and MySQL.
• Experience with replication, clustering and recovery that has been tested.

Responsabilités

• Install, configure, maintain PostgreSQL 12+ and MySQL 8+ (standalone and clustered).
• Run routine maintenance: schema housekeeping, index maintenance, statistics, retention.
• Manage users, roles, privileges and authentication on least-privilege basis.
• Forecast storage growth and advise on partitioning and archiving.
• Troubleshoot production problems: data corruption, replication failures, performance issues.
• Monitor database health: locks, deadlocks, wait events, replication lag, resource use.
• Analyse and optimise query performance with execution plans and InnoDB tuning.
• Produce root cause analyses for critical incidents and ensure environment consistency.

Connaissances

PostgreSQL

MySQL

Replication

Clustering

Query optimisation

Capacity planning

Monitoring

Incident analysis

Outils

InnoDB tuning

Execution plans

Description du poste

This is a production DBA post on open source engines: PostgreSQL and MySQL, standalone and clustered, across development, test and live. It is the unglamorous half of database work — the half where replication lag, lock contention and a badly planned query decide whether anyone else can do their job today.

It suits someone who tunes rather than guesses, who has restored from backup in earnest, and who writes the root cause analysis afterwards because the next incident depends on it.

What you would be doing

• Install, configure, maintain and upgrade PostgreSQL 12+ and MySQL 8+, standalone and clustered.
• Run routine maintenance properly — schema housekeeping, index maintenance, statistics, retention.
• Manage users, roles, privileges and authentication on least-privilege lines.
• Forecast storage growth and advise on partitioning and archiving before capacity becomes an incident.
• Troubleshoot production problems: data corruption, replication failures, performance degradation.
• Monitor database health — lock contention, deadlocks, wait events, replication lag, resource use.
• Analyse and optimise query performance, with execution plans and InnoDB tuning as everyday tools.
• Produce root cause analysis for critical incidents and keep environments consistent.

What you would bring

• Solid production experience on both PostgreSQL and MySQL.
• Replication, clustering and recovery experience that has been tested rather than documented.
• Real query optimisation practice on both engines.
• Capacity planning and monitoring instincts.
• The habit of coordinating with application and infrastructure teams rather than around them.

The work is full time on site in Brussels.