The register
The register lists Happy Crab Ltd. in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Happy Crab Ltd., number 10435896, incorporated 2016: 10 years of filings behind the name. Registered office: Venture X, One Ariel Way, London, W12 7SL, W12 7SL. By its SIC codes the business is in it, software and media. It has traded under other names before, including Literarium Limited.
For a candidate this means one less obstacle: Happy Crab Ltd. already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.