The register
SirionLabs Limited, London, holds a Home Office sponsor licence covering 2 routes: Skilled Worker and Global Business Mobility: Senior or Specialist Worker. It has been on the register since at least 2026. Its rating on the register is Worker (A rating).
Sirionlabs Limited is the registered name (Companies House number 12545426), a private limited company on the register since 2020. Registered office: 11 Cursitor Street, London, EC4A 1LL, EC4A 1LL. Its filed activity puts it in it, software and media.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.