Test Engineer (Integrated Command and Control Systems) for NATO with security clearance

WLG; Den Haag; On-site; EUR 42,000 - 62,000; Full time

Job summary

WLG in The Hague is seeking a Test Engineer to own quality for mission-critical command and control software. You will craft test plans and cases from requirements, balance manual and automated testing, and verify APIs and data flows through SQL drives. This role emphasizes edge-case discovery and meticulous problem-solving.

On-site in The Hague, the team values precise validation, robust traceability, and a proactive approach to delivering reliable software with real operational impact.

Qualifications

• Turn requirements into structured test artefacts, not just executing scripts.
• Ability to write SQL and perform API testing.
• Experience with issue tracking in JIRA and basic Linux usage.

Responsibilities

• Analysing requirements and writing structured test plans, test cases and scenarios from them.
• Deciding what deserves a manual test and what deserves an automated one, across functional, regression, performance and security testing.
• Querying databases directly in SQL to prove what the application is really doing.
• Testing APIs with Postman, SOAPUI or the equivalent.
• Logging, managing and chasing issues through JIRA.
• Hunting the edge cases — the meticulous, logical part of the job that separates a good test engineer from a checklist.

Skills

Structured test artefacts

SQL

JIRA

Linux

Attention to detail

Tools

Postman

SOAPUI

Selenium

Playwright

Job description

The bugs that matter here are the ones nobody thought to look for. A team in The Hague is delivering gap capability work packages on integrated command and control software, and it needs a test engineer who can own the quality of what ships. On-site in The Hague, Netherlands. What You Will Be Doing

• Analysing requirements and writing structured test plans, test cases and scenarios from them
• Deciding what deserves a manual test and what deserves an automated one, across functional, regression, performance and security testing
• Querying databases directly in SQL to prove what the application is really doing
• Testing APIs with Postman, SOAPUI or the equivalent
• Logging, managing and chasing issues through JIRA
• Hunting the edge cases — the meticulous, logical part of the job that separates a good test engineer from a checklist

What you will need

• Real experience turning requirements into structured test artefacts, not just executing someone else's script
• SQL you can write yourself, and hands-on API testing
• JIRA or a comparable issue tracker as daily habit
• User-level comfort on Linux
• An eye for detail and a problem-solving mindset

Nice to have

• Experience with test automation tooling such as Selenium or Playwright
• Background in command and control or air operations planning environments

Why this one is worth a look Testing here is not a rubber stamp at the end of a sprint — the software is operationally significant, so the quality bar is real and your findings actually change what ships. Normal office environment, an established team, and work that is visibly worth doing.