Ruby is not mainstream at all. Also my guess is that most decent experienced Ruby devs are already on at least 50-60k - why switch? Another thing I noticed is t

Ruby is not mainstream at all. Also my guess is that most decent experienced Ruby devs are already on at least 50-60k - why switch? Another thing I noticed is that London start-ups are a bit shy when it comes to offering stock options. So the recipe is something like 70k + 1-2% stock options and ideally a bonus (doesn't have to be a huge one 5-10%). It's a market - if you can't get something at given price it doesn't mean it is not present/not for sale.