OneMind
A collective-consensus platform where humans and AI agents reach shared decisions.
- Flutter
- Dart
- Supabase
- Edge Functions
- Postgres
Joel Castro
I build mobile apps and AI agents with Flutter.
Mobile app developer & indie builder. I make consensus tools, AI agents, and cross-platform apps — from first sketch to shipped product.
Featured work
View full archive →LLMGroupChat
A consensus engine where multiple LLMs debate and vote to pick stocks.
- Dart
- Supabase
- Deno
- LLM APIs
AI Calorie-Tracking App
AI Calorie-Tracking App
Client workA mobile app that estimates calories and nutrition from a photo of your meal.
- Flutter
- AI Vision
- Mobile
Polymarket Agent
Polymarket Agent
ExperimentAn autonomous AI agent that analyses and trades prediction markets.
- TypeScript
- Deno
- Supabase
- LLM APIs
About
I'm a mobile app developer focused on Flutter and FlutterFlow, with a soft spot for wiring AI into everyday apps.
Lately I've been building OneMind — a platform for humans and AI agents to reach collective decisions — and a handful of LLM-powered experiments.
I also freelance on Upwork, where I've shipped mobile apps and AI integrations for clients around the world.
Want to work together? Get in touch.