Test Engineer: Command & Control Systems - The Hague

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

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.