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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Open Source DBA - PostgreSQL and MySQL (Replication, Tuning, RCA) for NATO with security clearance - **Company:** Wlg - **Location:** Brussel, Belgium - **Contract:** Permanent contract - **Skills:** Query Performance, Data Analysis, Databases, PostgreSQL, MySQL, Open Source Technology, Performance Tuning, Query Optimization - **Published:** August 28, 2026 - **Apply:** https://www.careerjet.be/jobad/bec762d9982f0c5dc52d389dc337bf7eec ## About the Role * 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. ## Description WLG and our selected partners use cookies and similar technologies (together "cookies") that are necessary to present this website, and to ensure you get the best experience of it. 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You can provide or withdraw your consent to the different types of cookies using the toggles below. You can change or withdraw your consent at any time, by clicking the link "Manage Cookies", which is always available at the bottom of the site. To learn more about what the different types of cookies do, how your data is used when they are set etc, see our . Strictly necessary These cookies are necessary to make the site work properly, and are always set when you visit the site. Vendors Teamtailor common--cookies--preferences#handleCategoryToggle"> Analytics These cookies collect information to help us understand how the site is being used. Vendors Teamtailor common--cookies--preferences#handleCategoryToggle"> Marketing These cookies are used to make advertising messages more relevant to you. In some cases, they also deliver additional functions on the site. Vendors Youtube common--cookies--preferences#handleAccept">Accept these cookies common--cookies--preferences#handleDecline">Decline all non-necessary cookies common--header--menu#toggle" data-common--header--menu-target="button" > Career menu Employee Candidate Homepage common--dropdown#toggle"> Share page common--share#handleClick" data-provider="Facebook"> Facebook common--share#handleClick" data-provider="Twitter"> X common--share#handleClick" data-provider="LinkedIn"> LinkedIn Infrastructure & Platform Support · Brussels Open Source DBA - PostgreSQL and MySQL (Replication, Tuning, RCA) for NATO with security clearance Open source databases in production, run properly - replication that holds, queries that behave, and a root cause for every incident. Brussels, on site. careersite--jobs--form-overlay#showFormOverlay" data-careersite--jobs--form-overlay-target="coverButton"> Apply for this job blocks--cover--scroll#handleScrollDown" title="Scroll to content"> 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., Open Source DBA - PostgreSQL and MySQL (Replication, Tuning, RCA) for NATO with security clearance Open source databases in production, run properly - replication that holds, queries that behave, and a root cause for every incident. Brussels, on site. Loading application form jobs--overlay#closeOverlay"> Close modal * cookie-preferences#openCookiePreferences" aria-label="Manage cookies" class="company-link font-company-body py-1 my-1 @sm:my-0 @sm:py-0 px-4">Manage cookies ## Related Videos - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Optimizing Discovery: PostgreSQL's Role in Transforming GetYourGuide's Search](https://www.wearedevelopers.com/videos/1647-optimizing-discovery-postgresql-s-role-in-transforming-getyourguide-s-search) - [Kubernetes and Microservices with Multi-Model Databases](https://www.wearedevelopers.com/videos/382-kubernetes-and-microservices-with-multi-model-databases) - [Branch your database like your code: How schema changes and pull requests go hand in hand](https://www.wearedevelopers.com/videos/350-branch-your-database-like-your-code-how-schema-changes-and-pull-requests-go-hand-in-hand) - [Tracking vehicles at scale](https://www.wearedevelopers.com/videos/1999-tracking-vehicles-at-scale) - [Discover the open source trio you didn’t expect: .NET and PostgreSQL on Linux](https://www.wearedevelopers.com/videos/2042-discover-the-open-source-trio-you-didn-t-expect-net-and-postgresql-on-linux) ## Related Articles - [Making Data Warehouses Fast: A Developer’s Story](https://www.wearedevelopers.com/magazine/107-making-data-warehouses-fast-a-developer-s-story) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 168: Hacking Postgres, Blocking Meta and Fixing CSS](https://www.wearedevelopers.com/magazine/588-dev-digest-168-hacking-postgres-blocking-meta-and-fixing-css) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Dev Digest 138 - Are you secure about this?](https://www.wearedevelopers.com/magazine/486-dev-digest-138-are-you-secure-about-this) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)