Open Source DBA — PostgreSQL and MySQL (Replication, Tuning, RCA) for NATO with security clearance

Wlgroup; Brussel Hoofdstad; Sur place; EUR 60 000 - 90 000; Plein temps

Résumé du poste

Wlgroup is seeking a production DBA in Brussels to manage PostgreSQL 12+ and MySQL 8+ in standalone and clustered environments. You will perform maintenance, tuning, capacity planning and proactive monitoring to prevent incidents.

You will troubleshoot data issues, optimize queries, and coordinate with application and infrastructure teams to keep environments consistent and reliable. This on-site role demands hands-on problem solving.

Qualifications

• Solid production experience on PostgreSQL and MySQL.
• Replication, clustering and recovery experience proven in production.
• Real query optimisation practice on both engines.
• Capacity planning and monitoring instincts.
• Ability to coordinate with application and infrastructure teams.

Responsabilités

• Install, configure, maintain and upgrade PostgreSQL 12+ and MySQL 8+ in various setups.
• Run routine maintenance, schema housekeeping and statistics.
• Manage users, roles, privileges, and authentication with least-privilege.
• Forecast storage growth and advise on partitioning and archiving.
• Troubleshoot production problems and analyse root causes.
• Monitor health: lock contention, replication lag and resource use.
• Analyse and optimise query performance with execution plans.
• Produce root cause analyses for incidents and keep environments consistent.

Connaissances

PostgreSQL

MySQL

Replication

Clustering

Query optimization

Capacity planning

Monitoring

Cross-team coordination

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.