Ask HN: Finding interesting projects to work?

So, I don't like opensource projects because most of the projects I've been involved working with big data. It involves handling data reliably, efficiently, securely and doing this all within strict limits. Opensource isn't offering me this kind of opportunity to set up a system which consumes tons of data and new challenges keep popping.

My team is looking for such projects, see what I posted earlier: https://news.ycombinator.com/item?id=16400111

Now, we've projects which are bringing in good money. So, we switched from working for money to working for fun.

We operate mostly in ad tech. What do you recommend?