I'd really consider Barcelona and here are a few reasons why: * Compact and easy to travel around * Ton of engineers looking for interesting startups, enginee

I'd really consider Barcelona and here are a few reasons why: * Compact and easy to travel around * Ton of engineers looking for interesting startups, engineering quality is higher than the average in the UK. * Beautiful city, easy to attract talent. * Engineering salaries are much cheaper so less money needed to start hiring. * Lots of awesome co-working,meetups and cafes to work in, goes hand in hand with being easier to travel around. * I've lived in the city on 12k euros before and still had a very comfortable life, gives you more runway! Reasons that Barcelona isn't suitable: * The legal system and bureaucracy is much more complex and slow which can result in a lot of costs. * If you start as a sole trader equivalent here you have to pay around 250 euros a month regardless of whether you turn a profit (or even bill anything) which is just maddening. * Transient population, there are a lot of folks that move here from all over the world and move on again after a year or two. It can be harder to start,keep and maintain professional relationships. * The official languages are not English, they are Catalan and Spanish. Everyone is bilingual but it does bring challenges in communication, learning two languages and also can be trickier targeting the US/UK market for example (whilst developers here will have English sufficient to work in if needed copywriters/marketers won't always have the native level needed). * As with most major European cities there are direct flights to London/Madrid/Berlin/Paris/Milan/Rome/Prague/USA etc