Ruby on Rails jobs in London

London is the largest concentration of Rails roles in the UK, with fintech leading (GoCardless, Monzo, Marshmallow, FreeAgent), health-tech as the second cohort (Patchwork Health, Kooth, NHS suppliers), and a steady drip of media, edtech, and marketplace teams shipping Rails behind their billing, member dashboards, and editorial workflows. Most product companies offer remote-UK or hybrid 2-day contracts; full five-days-in is rare.