What I’m working on right now.

An automated weather-prediction-market trading bot for Polymarket and Kalshi. The core is a multi-model NWP ensemble — nine deterministic models (GFS, ECMWF, ICON, JMA, GEM, Météo-France, UKMO, BOM, CMA) plus four ensemble systems with ~143 members, NOAA/MOS point forecasts, and METAR station observations — fed into a LightGBM post-processor with 5-fold temporal cross-validation. The bot trades when the model disagrees with the market and the edge is meaningful.

• Multi-strategy execution: long YES on cheap most-likely buckets, contrarian NO when the model disagrees with the book, observation gating against live METAR readings.
• Risk: adaptive Kelly sizing with calibration-tier confidence, daily loss limits, per-city position caps, leader election to prevent duplicate execution.
• Worker on Railway, Postgres on Supabase, Discord alerts.

“Prove it or it’s cap.” An API-first platform where users post predictions, lock them, and external data sources resolve them when the deadline hits. No betting and no payouts — just public receipts and a rep score. CoinGecko handles crypto resolution; the resolver layer is built to extend to other domains. Custom JWT-cookie auth, Drizzle ORM, Railway Postgres. Deploys on Railway.

A Pokémon TCG research tool. Free, Pro, and Premium tiers backed by Stripe Checkout, with scan limits and feature gates per tier. The interesting part is the insights pipeline — Twitter/X buzz, Reddit sentiment, eBay completed sales, and PSA population trends aggregated into a single “rising” list that surfaces undergraded cards before the market notices. Prisma + NextAuth on the back end.

A creator-facing ad SDK: paste a snippet, earn money. One-line install for banner, interstitial, and rewarded placements with signed requests, multi-provider routing (smartlinks, house ads, optional AdSense), referrer blocklisting, and CSP-aware fraud controls. Payouts via Stripe Connect (USD) and USDC on Base. Two plans with platform-cut differentials.

A small reflex-timing game. Click the button at the perfect moment; unlock cosmetics and badges based on streaks. Streamlit on the front end. Built it as a Saturday project to play with animation and state in Streamlit. github.com/MikeyPetrillo/pushthebutton-site →

A small experiment in adjustable-depth explanations. Source is public. github.com/MikeyPetrillo/explain-like-im →