average is the key part here. When I was looking for jobs in London, the average salary was just over 50k GBP. I would not take a job for that money in London.

average is the key part here. When I was looking for jobs in London, the average salary was just over 50k GBP. I would not take a job for that money in London. But good companies, with good developers and good hiring bars, will pay good salaries for you to do a good job. Averages and selection biases are abound here. Granted, hired.com probably has a higher-level sample than something like glassdoor. (biggest edit: engineer --> developer, cos we're mostly not engineers)