Smeaton, I am 40 and looking for a relationship. I am on tinder and POF I prefer tinder.
For me, the job and university are very important. I am highly educated from a top university (and I have further qualifications) so I want someone whom I consider a peer intellectually. I might be missing some super clever guys who simply didn't go to university for a number of reasons, but there has to be a cut off somewhere.
Job: I prefer a professional job. I have been chatting to bankers, lawyers etc. We immediately find common grounds, talk about current affairs, legislation etc. It might sound boring but also so far (3 men) I have always also found common friends who work in those professions. This is not about money, it is about being able to enter the respective worlds very quickly. I even helped one with the interpretation of some papers (unfortunately it didn't go well after that).
As for profile, keep it short (for tinder) but I want to know if you are after a bit of fun or if you are looking for a relationship (which is what I am looking for). Don't say you are looking for your other half etc it makes you sound desperate.
Say whether you have children or not. Hobbies: mention 2-3, possibly sport and something else.
Also, finally I would really appreciate if you said you have tattoos or not (personal preference).
I hope this helps.