The register
The register lists Those Aren't Mountains Ltd in Hackney as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Those Aren't Mountains Ltd, number 10073193, incorporated 2016: 10 years of filings behind the name. Registered office: 4th Floor 86-90 Paul Street, Hackney, London, EC2A 4NE, EC2A 4NE. Its filed activity puts it in it, software and media. It has traded under other names before, including Clear Paper Printing 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.