Check out jobs.ac.uk for academic jobs in the UK. The Royal Economic Society also hosts a (smaller) conference similar to the ASSA meetings in that it brings together economics PhDs and recruiters. (It's called the RES PhD Meetings and will be held in London a week or two after the EEA meeting in Naples.) I was interviewed by several UK and European universities there for the 2015--2016 job market.
A lot of UK universities also advertise from March to August (i.e., after the normal job market cycle has ended). So be sure to keep looking and applying to these jobs if you need to. When I was on the market, I had zero offers by April and thought that meant I failed the market and would have to redo it all again the next year. But I kept applying to precisely these late-advertised jobs. Eventually---i.e., in August; no one said the job market was easy!---I got one in a research intensive university with colleagues I really like and in a city I adore.
If you are interested in an academic job in a non-U.S. location, ask your supervisor to mention it in his letter of recommendation.