The register
The register lists ShelfNow Limited in London 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).
At Companies House the business is Shelfnow Limited (company number 11042412), a private limited company incorporated in 2017, 9 years ago. The registered office is at 124 Goswell Road, London, EC1V 7DP, EC1V 7DP. By its SIC codes the business is 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.