Even after Brexit (if it ever happens) you should still apply. Rights to work in the UK can be acquired. From my observation the number of non EU IT workers (and foreign workers in general) out-number those from the EU
If you’re ready to move to the UK for this, then you will be fine. Even with a hard Brexit , the sunset period for EU residents to apply for special grandfathering status of their residency doesn’t end until quite late:
> If you’re an EU, EEA or Swiss citizen, you and your family can apply to the EU Settlement Scheme to continue living in the UK after 30 June 2021. If your application is successful, you’ll get either settled or pre-settled status.
...
## If the UK leaves the EU without a deal
> You will need to be living in the UK before it leaves the EU to apply. The deadline for applying will be 31 December 2020.