# Still here, still building.

**Published by:** [casatrick](https://paragraph.com/@casatrick/)
**Published on:** 2026-07-01
**URL:** https://paragraph.com/@casatrick/still-here-still-building

## Content

I have been building a market maker bot on Polymarket for the past few weeks and honestly it has been one of the most interesting developer projects I have worked on. Most people think trading bots are complicated but the core logic is simple. You place a buy order and a sell order at the same time and you collect the difference when both fill. The hard part is everything else. Managing inventory when only one side fills. Cancelling orders fast enough when the market moves. Choosing the right markets with enough volume to actually get fills. The Polymarket CLOB API is surprisingly good for developers. It is well documented, free to use, and supports real limit orders on a proper order book. I built everything in Node.js, store all my trade data in MongoDB, and run the bot on a VPS with PM2 keeping it alive 24/7. Nothing fancy but it works. What I learned most is that market making is not about predicting outcomes. You are not betting on YES or NO. You are just providing liquidity and getting paid the spread for doing it. On high volume markets during big events like elections or major news, the spreads widen and the opportunity gets better. On slow quiet markets, your orders just sit there and nothing happens. I am still improving the bot every week. Better spread logic, smarter market selection, tighter risk controls. All my code is open source and available on my GitHub at github.com/casatrick if you want to follow along or build something yourself. Ready for the third post anytime!

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