Neat! A bit over a decade ago, I had a similar experience with Lucene (not that I implemented it from scratch, but certainly used it in a fairly unorthodox, fo

Neat! A bit over a decade ago, I had a similar experience with Lucene (not that I implemented it from scratch, but certainly used it in a fairly unorthodox, for the time, manner). I had to implement some search stuff and Elastic Search was still in its infancy so was not necessarily the "obviously right choice" as it has been recently for this kind of document search job. I implemented a multi-tenant search engine on top of Lucene using C# and Azure Blob Storage under the direction of my manager at the time. This was actually pretty cool, because I had actually learned about TF-IDF and search technologies in school so it was nice to be using some of that knowledge. And there were a lot of problems to solve with regards to locking, index update coordination, etc. that, as we know, ES takes care of for us today. Anyway, the project was a success, and launched, and backed a couple of products for a couple of years until it was decommissioned due to outside forces basically making it irrelevant. That knowledge and experience seems to have ultimately led me down the path to becoming the resident ES "expert" at my current position.