I'm not sure how you surface the more nuanced understanding of each users knowledge or interests.
The few things I'm thinking are 1) more weight to more recent content than earlier. We change and grow as people. I used to be in the music industry, then 3d mapping, and now neurotech. My music experience is now old, but neuro is fresh. That may be more interesting/valuable.
2) commonality with the viewing user. Where do we overlap, and again, where do we overlap where others don't? How often would a person be searching for someone whom they don't have overlap with? We are likely interested in the same things. Though perhaps somebody who knows nothing about marketing, is looking for marketing help, so I'm not sure how you surface that.
I guess I'm wondering what you imagine the ultimate use case being? Or the early adopter use case. You may be prioritizing the algorithm for uses I'm not expecting.