You're a British citizen, you can move to any country in the EU. If you marry your girlfriend, she can move with you, and other countries in the EU will not require her to show income to move with you. You could be there in a few months, without waiting for companies to notice you. Source: am British citizen by descent, have lived in France.
Edit: and then to move to Britain from an EU country she doesn't need to show an income at all https://europa.eu/youreurope/citizens/residence/family-resid...