Software Engineer in Test

Company: La Fosse
Apply for the Software Engineer in Test
Location: London
Job Description:

Please note: Sponsorship is not available for this role; therefore, candidates must hold full right to work in the UK.

La Fosse has partnered with a SaaS business to recruit an experienced SDET into their growing team. This role will be responsible for driving quality across a complex suite of web and mobile applications, working alongside engineering to improve testing capability, increase automation, and support the ongoing modernisation of their platform

Key Requirements:

  • Strong experience in C# / .NET environments (essential)
  • Proven background testing API driven architectures
  • Experience testing across web and mobile applications
  • Ability to operate as a senior, self-sufficient QA. setting direction rather than taking it
  • Experience working on modernisation / transformation programmes
  • Strong understanding of end-to-end testing strategy across multiple systems
  • Comfortable working across multiple applications / large, complex platforms
  • Experience integrating or testing third-party systems / external APIs
  • Exposure to full-stack environments (C#, backend services; Blazor desirable but not essential)

Nice to have:

  • Experience with test automation (or introducing automation into low maturity environments)
  • Experience working in low process or early-stage QA functions
  • Knowledge of mobile testing (Android / Flutter)

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Posted: September 21st, 2026