Until the end of this year nothing will change. You can still move to and settle in the UK, if you're crazy enough to want to for some reason.<p>It's not yet known what the situation will look like post-2020.<p>You'll need to apply for pre-settled status before mid next year
For now, nothing.<p>But EU citizens working in the UK must apply for pre-settled status by the 30 June 2021. But who know what will happen by the end of 2020. A FTA by the UK-EU or US or an out right no deal scenario are possible outcomes from the process which could change this situation for EU citizens in the UK.
Trust me, if you're an EU citizen, you don't want to work in the UK. Horribly dysfunctional, overtaxed country run by evil kleptocratic psychopaths. Take a look at the Nordics instead.
For the moment it’s not clear what’s ahead, but for those EU developers who are allowed to work in the UK in the future, as I see it the biggest risk is that the current reciprocal agreements concerning healthcare, retirement plans, and unemployment insurance will no longer exist, and so the cost of that will have to be factored in when considering a job offer.