Hi. There's an ongoing online competition Tech Arena by Huawei.

There are two optimization problems, with total prize pool of 20k GBP. You should form a team of up to 3 university students (age 18+), registration deadline is November 30.

If I understand correctly, the competition used to be available only for UK students and now it's the EU too. There seems to be an optional trip to China for winners (it was just a trip/ceremony in UK last year).