I also use a Trello board for this and I’ve known that there is a market for this. I’ve been thinking of switching to Notion to try that out as my solution.
That said, as I have been considering building something like this, I’ve imagined that it could provide some of the value that Glassdoor and Levels.fyi both provide.
In my Trello board I take notes about the salary bands of each position, what questions are asked in each interview, and also how I’m feeling about each. If this information is handled properly, you can collect it and (perhaps for the free version) share this anonymously with other people.
That said, one thing I’m missing from my Trello board is versatility. I want to be able to record/update my experience/interview status with a company and then see that information represented in several different ways. Seeing a swim lane representation of interview stages is helpful (where Trello shines) but it also might be helpful to see it in spreadsheet form where I can sort based on certain attributes. Sometimes things don’t fit well in swim lanes.
One thing I do like about Trello is that I can basically journal about my experiences there, though it would be nice to see all my journal entries together in one place, rather than being forced to see them separated by card.
Feel free to reach out to me if you have more questions: bradydowling at gmail