The register
The register lists Hazelcast UK Limited in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. Rating on the current register: Worker (A rating).
Hazelcast UK Limited is the registered name (Companies House number 09844692), a private limited company on the register since 2015. Registered office: Building 4 Foundation Park, Roxborough Way, Maidenhead, SL6 3UD, SL6 3UD. By its SIC codes the business is in it, software and media. It has traded under other names before, including UK Software Services and Consulting Ltd.
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.