Are you specifically looking for recent Portuguese authors or are you open to recommendations in general? Because honestly, Leya has some cool collections, but I can't really talk about the specific books in that series on contemporary writers without having actually read them, you know?
What I'd suggest is checking out reviews on Skoob or even Goodreads, because you'll find people who actually read them and leave useful comments. The advantage is seeing what other people thought of the writing, the pacing, whether it's actually worth the money. There are also literature bloggers who cover Portuguese releases pretty heavily, and honestly those reviews are more reliable than someone just saying "oh, that book is good" without going into details.
If you want something safer, maybe it's worth looking into shortlists or Portuguese literature awards from recent years - that usually points to works that really made an impact. Then you already know you're picking something that at least got noticed.