RYUN Engineering & Research
Blog & Engineering Notes
Things we built, measured, or got wrong. Written by the developer, dated, and updated in place when code or benchmarks change.
Articles (1)
#NetherlandsΒ·12 min
The Visa Sponsorship Blackbox: Why 80% of "Sponsoring" Job Postings Are Ghost Listings (And How to Map Verified Sponsors via State Registers)
Commercial job boards monetize fake visa sponsorship checkboxes and third-party recruiter spam. Discover the statutory mechanics behind verified employer registers in the Netherlands, Germany, the Nordics, and the UK, and how open data eliminates ghost listings.
Nov 7, 2026Read