The register
The register lists boxxe Limited in York as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Boxxe Limited (company number 02109168), a private limited company incorporated in 1987, 39 years ago. The registered office is at Floor 3, Artemis House, Eboracum Way, York, YO31 7RE, YO31 7RE. Its filed activity puts it in it, software and media. It has traded under other names before, including Software Box Limited.
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.