WEAVE-QSO and J-PAS are two large astrophysical surveys active from 2022 to 2029, on two major observatories, supported by two international collaborations: WEAVE-QSO (European) and J-PAS (Brazilian-Spanish). These two surveys are partners towards a common goal: cosmology and galaxy formation in the first half of the history of the universe using data of unprecedented quality and size. J-PAS does this by performing imaging in 56 colours and WEAVE-QSO follows this up with spectroscopy. The exploitation of this data presents a variety of challenges and opportunities that we seek to address through machine learning. In some cases, initial steps have been undertaken, in other cases the project is in the cradle. The leads of these surveys propose to pool the expertise of the partners and bring together innovative methods for the fullest exploitation of our large common data set.