JoshMa
Building at the intersection of markets and machines.
AI-powered trading tools, full-stack apps, and automated systems.
Who's behind the terminal
I trade the markets and I build the tools I wish existed for trading them. Started on the dev side, got pulled into markets, never looked back.
On the tradingside — equities, crypto, a mix of quant and discretionary. On the devside — AI tooling, full-stack apps, and the infrastructure that ties it all together.
Most traders can't code. Most devs don't trade. I do both, and that's the edge.
Work & Projects
Things I've built, mostly for myself. If I needed it and it didn't exist, I made it.
AI Trading Agent
Multi-agent system that runs autonomous macro + micro market analysis with built-in guardrails, confidence scoring, and a complete audit trail.
Market Dashboard
Real-time trading dashboard — order flow, options Greeks, correlation heatmaps, LOB snapshots, and funding rates. Virtualized tables built for massive datasets.
Backtesting Engine
Vectorized, event-driven, and tick-replay backtesting with walk-forward validation and regime-adaptive position sizing. C++ hot-path for sub-10µs order book updates.
Algorithmic Strategies
Quantitative pipeline with regime-aware signal evaluation and HRP/Kelly/MVO portfolio construction. Runs across crypto, FX, and equities via unified exchange adapters.
Risk Management System
Tail risk modeling (EVT/GPD), factor decomposition, and correlation crisis detection with multi-layer drawdown protection. Circuit breakers, position caps, and blocking pre-trade checks.
Skills & Services
The stack I trade with, build with, and ship with.
LANG & FRAMEWORKS
AI & ML
TRADING & QUANT
INFRASTRUCTURE
What I can build for you.
AI Development
Build AI agents that plug into your workflows — RAG pipelines, LLM orchestration, and fine-tuned models for domain-specific tasks.
Full-Stack Dev
Ship production Next.js apps, real-time dashboards, and APIs — from database schema to deployed product on Vercel or AWS.
Trading Tools
Automated trading bots with backtested strategies, custom TradingView indicators, and real-time portfolio risk dashboards.
Consulting
Audit your AI stack, optimize trading infrastructure, or architect a system from scratch. Hourly or project-based.
Blog & Thoughts
Writing about markets, code, and everything in between.
How I Built an AI Agent That Monitors My Positions
Using LLMs and live market feeds to build an agent that tracks open positions, flags risk, and suggests exits — without touching a single API key at runtime.
Building a Real-Time Market Dashboard with Next.js
Streaming tick data over WebSockets into a Next.js app with custom charting, server components for historical context, and sub-second UI updates.
Why Most Backtests Lie
Overfitting, survivorship bias, and the look-ahead trap. A breakdown of why 90% of backtested strategies fall apart in live markets — and what I do differently.
Get in Touch
Open to freelance projects, collaborations, and interesting conversations about markets and tech.
Available for work
Freelance · Contract · Consulting