Since 2016 I have been participating in Numerai Tournament, "the hardest data science tournament on the planet" as they claim. Numerai is a weekly global data science tournament to solve the stock market.
If you are interested in reading more about my experience, you can read this article I wrote some months ago explaining my participation in Quantopian and Numerai: How I Made $350k in Financial Tournaments.
I have several models running in production, automatically submitting new market predictions every Saturday. Take a look at their performance during the last year.