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# Software Tester

- **Company:** Visma
- **Location:** Enschede, Netherlands
- **Experience:** Expert
- **Salary:** €13,347.0
- **Contract:** Temporary contract
- **Skills:** Testing (Software), .NET Framework, Application Programming Interfaces (APIs), VoIP, Software Debugging, Apache JMeter, Session Initiation Protocols, Load Testing, Mstest, Selenium, Wireshark, WebRTC, Gatling, Playwright, Kamailio
- **Published:** June 30, 2026
- **Apply:** https://www.nationalevacaturebank.nl/vacature/44ac28b5-af62-4f96-b95c-ca34deaf02a5/software-tester

## About the Role

Je bent in de kern een senior QA automation lead; je combineert technische diepgang met leiderschap op inhoud. Je hoeft geen pure telecom engineer te zijn, maar je bent wél comfortabel in real-time en protocol-gedreven complexiteit.

 + Aantoonbare senior ervaring in software testen/QA; ownership op kwaliteit binnen productteams.
 + Sterk in testautomatisering; framework ownership, CI integratie, flakiness elimineren, coverage schalen zonder delivery te vertragen.
 + Sterk in teststrategie; risk-based denken, duidelijke quality gates en heldere release-rapportage.
 + Sterk in debuggen over meerdere lagen; browser, APIs/services, omgevingen, pipelines.
 + Leiderschap door influence; standaarden neerzetten, teams coachen en kwaliteit verhogen zonder bottleneck te worden.
 + Non-functional mindset; performance en reliability vertalen naar herhaalbare tests en meetbare inzichten.
Pré

 + Ervaring met protocol- of real-time systemen; VoIP/SIP is een plus;
 + Ervaring met Playwright, Selenium of soortgelijke test frameworks;
 + Bekend met tooling zoals Wireshark en bij voorkeur sngrep; of vergelijkbare aanpak;
 + Bekend met VoIP (load)testing tools zoals SIPp, en VoIP client libraries zoals SIPSorcery;
 + Enige bekendheid met Kamailio en/of Asterisk; high-level is prima;
 + WebRTC basiskennis; ICE/STUN/TURN en typische browser/network edge cases;
 + Ervaring met loadtest tooling; k6, JMeter, Locust, Gatling of vergelijkbaar; plus netwerk-impairment aanpak/tooling;
 + Ervaring met .NET en de MSTest library.

## Description

In deze rol ligt de focus op de volgende stap van ons team van testers; het professionaliseren en integreren van QA in alles wat we doen. Jij vervult daarbij de senior/lead rol; je brengt richting, standaardisatie en technische diepgang in testautomatisering en je helpt teams consistent te leveren met aantoonbare release confidence.


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