David Nguyen • Former Pro Player

I build things
that make money.

Developer focused on trading systems, automation, and full-stack applications. App Academy grad. I like turning ideas into products that solve real problems — from prediction market bots to client websites to mobile fitness apps.

GitHub
6+
Projects shipped
3
Live products
2022
App Academy
Projects

What I've built

Real projects with real users, real money, and real results. No tutorial clones. Some repos private to protect trading edge.

Automated Trading

Polymarket Trading System

Production arbitrage bot for Polymarket prediction markets. Scans hundreds of markets in real-time for price inefficiencies, buys both YES and NO outcomes when combined price is under $1.00 to lock in guaranteed profit. Fee-aware execution across sports, political, and crypto markets with dynamic position management and risk controls. My most developed project.

Python asyncio Web3.py Polygon WebSocket
polymarket-arb
[SCAN] 847 active markets found [FILTER] 312 with sufficient liquidity [ARB DETECTED] Fed Rate Cut June YES ask: $0.39 NO ask: $0.59 Total: $0.98 Spread: 2.0% (fee: FREE) *** EXECUTING *** BUY YES 500 shares @ $0.39 = $195 BUY NO 500 shares @ $0.59 = $295 Cost: $490 Payout: $500 (guaranteed) Profit: +$10.00 (2.04%) -------------------------------------- Daily P&L: +$142.50 Exposure: 38% (limit: 50%) Pairs active: 12
Automated Trading

NQ Futures Trading Bot

Automated /MNQ futures trading system built for TopstepX prop firm evaluation. Combines key level rejection with a "God setup" cascade pattern detector. Real-time news sentiment filtering, regime-based position sizing, and risk management. Handles real capital.

Python TopstepX API FastAPI SQLAlchemy Finnhub
unified-bot
====================================== UNIFIED TOPSTEP BOT - 11:00:15 ====================================== Price: 25,579.25 Daily P&L: $+258 | Vol: LOW Sizer: Base 2 + Reserve 2 Sentiment: BEARISH (weak) REGULAR SETUP: ✓ 4H Trend: DOWN ✓ Key Level: Resistance @ 25653 ✓ Rejection: Bearish candle *** ENTRY SIGNAL *** SHORT Entry: 25,579.25 Stop: 25,629.25 (50pt = $200) Target: 25,504.25 (75pt = $300) -------------------------------------- 1hr later... EXIT: Target hit P&L: +75 pts = +$300 ======================================
Trading Infrastructure

Market Intelligence Bot

Comprehensive market intelligence system for /MNQ futures trading. Processes L2 DOM data to calculate delta flow, volume profile (POC, value areas), and order clusters. Tracks FVGs across timeframes with fill probability, session ranges, multi-timeframe MAs and VWAPs, and identifies stop danger zones. Generates real-time Discord alerts with divergence signals and bias analysis.

Python Volume Profile Delta Flow FVG Tracker Discord
alice-alerts
MNQ FULL MARKET REPORT ══════════════════════════════════════ BIAS: MIXED - Wait for alignment ALERT: DIVERGENCE Price -154pt but delta positive Price: 27263.00 1H Trend: BEAR 4H Trend: NEUTRAL DELTA FLOW Net Delta: +28.3% BULLISH Buy Vol: 15,808 Sell Vol: 8,841 B/S Ratio: 1.79 KEY LEVELS Prev High: 27623 Prev Low: 27089 Week High: 27623 Week Low: 27006
Trading

Trading Journal

Personal trading journal tracking live trades, P&L, and strategy notes across futures, stocks, and prediction markets. Built as a web app to log entries, review performance, and stay accountable.

Next.js Vercel
Live Journal View Repo

pw: GG123$%

trading-journal
Trading Journal ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Live trade logs P&L tracking Strategy notes & reviews Password protected
Client Work

Green Image Tree Service

Full marketing website + Google Ads campaign for a DFW tree care company. 43 hand-built pages with 10 geo-targeted city landing pages, 15 service pages, live NWS storm alerts, dark mode, video hero carousel, and a 12-campaign Google Ads architecture with 190+ keywords. Designed to dominate local search.

HTML/CSS/JS Vercel Google Ads SEO NWS API Decap CMS
Live Site View Repo
Green Image Tree Service homepage
Mobile App

FLXN — AI Fitness Coach

AI-powered fitness app that unifies workout programming, nutrition tracking, and body composition goals under one intelligent system. The core differentiator: an AI coach that coordinates training and nutrition together, adjusting workouts based on cut/bulk/maintain phases. Built with React Native + Supabase.

React Native Expo TypeScript Supabase tRPC RevenueCat
In Development
Intelligence Tool

Polymarket Whale Tracker

Real-time monitoring system that tracks positions and trades of top Polymarket traders. Detects position changes, identifies arbitrage pairs, and pushes Discord alerts for significant moves. Built for edge — knowing what the smart money is doing before the market prices it in.

Python aiohttp Discord Webhooks asyncio
whale-tracker
[WHALE ALERT] @trader_0x4f2a Position change detected Market: Fed Rate Cut June Side: YES Size: $42,800 (+$18,200) Avg: $0.62 -------------------------------------- [WHALE ALERT] @trader_0x8b1c New position opened Market: BTC > 80k by March Side: NO Size: $31,500 Avg: $0.44 -------------------------------------- [ARB] Spread detected: 3.2% Fed June YES vs Jul NO
E-Commerce

Aurelle

Women's wellness supplement brand. Designed and built the storefront from scratch — product cards, scroll animations, science-backed ingredient breakdowns, subscription model, and review integration. Targeting the 35+ women's health market with clinically-studied formulations.

React E-Commerce Product Design Branding
In Development
Aurelle homepage design
Research Tool

Product Research Bot

E-commerce product discovery tool that combines Google Trends, Amazon competition analysis, Shopify saturation checks, and Reddit sentiment to score product opportunities 0-100. Streamlit web UI for team collaboration. Built to find winning products before they go mainstream.

Python Streamlit Playwright VADER Sentiment
product-research
Analyzing: Dome Foundation Brush Google Trends: ████████▁▁ 78/100 Amazon Comp: ███▁▁▁▁▁▁▁ Low Shopify Satur: █████▁▁▁▁▁ Med Reddit Sentim: ███████▁▁▁ +0.72 COGS: $3.20 Sell at: $19.99 Margin: 68% -------------------------------------- Overall Score: 82/100 Verdict: ✓ GO (7/7 checks passed)
Web App

Ryze Trait Tracker

TFT composition optimizer with real-time trait suggestions, cost-optimized team building, and mobile-responsive design. Live and used by the community. Because I also play the game.

React Vite CSS
Live Demo View Repo
Ryze Tracker screenshot
Skills

Tech I use

I reach for whatever solves the problem. Most comfortable in Python and TypeScript.

Languages

Python TypeScript JavaScript SQL HTML/CSS

Frontend

React React Native Expo Vite Tailwind CSS

Backend

FastAPI Express tRPC SQLAlchemy Drizzle ORM

Infrastructure

Vercel Supabase GitHub Actions Git

Trading & Data

Alpaca API TopstepX API Web3.py Finnhub pandas asyncio

Tools

Playwright Discord Bots Streamlit Claude Code
Competitive Gaming

Esports Career

Competed at the highest level across multiple titles. Same drive now goes into building products.

Valorant

China Nguyen / Equinox — Top 5 NA (2020)

Spacestation Gaming (2021)

Coach — Women's team (2022)

League of Legends

Peaked Challenger (Top 200 / 0.02%) — Solo Queue & 5's

Top 16 Collegiate — UT Arlington (2015-2016)

Heroes of the Storm

Team Blaze (2016)

Collegiate Grand Finals — 2nd Place, UT Arlington (2016)

(School won the following year)

Fortnite

$5,000+ tournament earnings (2017-2018)

CS:GO

HWML — ESEA MDL (2018)

Teamfight Tactics

Peaked Top 5 — Sets 1 & 2 (2019-2020)

Challenger (Top 200 / 0.02%) — Every set played

Streamer — 50-100 avg viewers (2 years)

About

Who I am

I'm David — a developer based in DFW, Texas. I studied software engineering at App Academy and spend most of my time building things that either make money or solve a problem I personally have.

My background is a mix of automated trading systems (futures, stocks, prediction markets), full-stack web/mobile apps, and client work. I've built bots that handle real capital, websites that rank on Google, and tools that help people make better decisions.

Outside of my full-time role at Waymo, I'm building side projects, at the gym, or on the pickleball court. I believe in shipping fast, learning from real usage, and not overthinking things.

Trading

Active /MNQ futures trader. Built two trading bots (swing + intraday) and a private trading journal. Currently working through a Topstep prop firm evaluation.

Ex-Pro Gamer

Former professional Valorant player, top-ranked in League of Legends, TFT, Fortnite, CS:GO, and Heroes of the Storm. Built community tools (Ryze Tracker, TFT Stats Project) during my competitive days. Now I channel that competitive energy into fitness and entrepreneurship.

Business

Researching e-commerce (dropshipping validation framework) and doing client web development. Always looking for the next opportunity.

Let's work together

Open to freelance work, collaborations, and interesting problems.

GitHub Email