I've been independently (that is -- in my free time) researching vector search databases and neural search frameworks. You can find my findings in the Medium blog. I also consult on these topics, if you need a hand or support in designing your vector search powered engine.
Vector search blog: https://dmitry-kan.medium.com/
Vector Podcast: https://www.youtube.com/c/VectorPodcast
GitHub: https://github.com/DmitryKey/bert-solr-search
Twitter: https://twitter.com/DmitryKan