标签：#ha

I couldn't find a simple way to explore the Brazilian startup ecosystem geographically, as I can in other places like the Bay Area or London, so I built one. The map currently includes hundreds of startups from Sao Paulo and their job opportunities. The most interesting thing I've learned so far is how clustered startup activity is in a handful of areas. I'd love to hear your thoughts. The EN version: https://www.startupsbr.com/sao-paulo

Hey everyone, I've been deep in prediction market infrastructure for a while and just open-sourced a market maker bot designed for CLOB-based prediction markets like Polymarket. What it does: Quotes both sides of a binary market automatically Adjusts spreads based on order book depth and volatility Manages inventory risk to avoid getting stuck on the wrong side of a resolved market Built on top of Polymarket's CLOB API with Gnosis Safe / EOA wallet support on Polygon The core challenge with prediction markets vs. regular markets: Normal market making is about capturing spread. Prediction markets add a brutal edge case — resolution risk. If you're holding YES at 0.6 and the market resolves NO, you're not just down on the spread, you're down the full position. So the bot has to: Track time-to-resolution and widen spreads as resolution approaches Reduce inventory exposure on markets with high directional momentum Use FAK orders to avoid resting limit orders too long near resolution Stack: Rust Polymarket CLOB API Polygon (USDC settlement) SQLite for order state tracking What's next: Dynamic spread model based on implied volatility Multi-market portfolio rebalancing Better signal integration (news feeds, oracle data) GitHub: https://github.com/HarrierOnChain/Prediction-Markets-Trading-Bot-Toolkits Happy to answer questions on the architecture, risk model, or anything CLOB-related. Always looking for feedback from others building in this space.