I had a question regarding a job.

it’s for a recruitment company that post job adverts for tech companies in the UK and US. The only concern I have that some of the companies that use said company to post their jobs are dealing in haram such as alcohol/debt collection/gambling companies because tech encompasses all categories. These aren’t the majority at all.

My job will be to process the adverts and assign attributes to them such as the years of experience required, which category the job falls into e.g. engineering, marketing etc so our system can show the job to the relevant candidates.

It would not be permissible to process the adverts of haram companies (like those that sell alcohol). If you have a way of picking and choosing which adverts to process, then it would be halal to take this position. Otherwise you should avoid it.