First, don't worry, we've all had crappy jobs. You will be OK. You have no reason to feel guilty at all. You don't owe them anything. You always have to go be

First, don't worry, we've all had crappy jobs. You will be OK. You have no reason to feel guilty at all. You don't owe them anything. You always have to go behind your employer's back when you're looking for a new job, even if you have a great relationship with them. Stay in your job until you have another one lined up. When you do resign, smile, be professional, don't argue with them about what might have been and don't agree to do anything beyond your notice period. I'm based in London and have ~8 years experience of the tech scene here. I'd be happy to look at your CV and give you some pointers (feel free to anonymise, don't mind either way) or answer any other questions: my anonymous email is in my profile.