Hi, I'm Cole 👋
Full-stack developer and CS student at Texas State University. I've built and continue to maintain several live applications that currently serve over 100,000 monthly users.

About

I enjoy building projects that solve real world problems. My projects include a disposable email service (70k+ MAU & 19k+ mobile downloads), a gaming analytics platform (27k+ MAU & $1,200+/month ad revenue at seasonal peaks), and a price tracking tool (3k+ MAU) for Costco shoppers.

Skills

React
React Native
Next.js
TypeScript
Node.js
Express.js
Python
Flutter
PostgreSQL
Firebase
Stripe
C++
Dart
Redis
SQLite
Puppeteer
NestJS
Vite
Expo
My Projects

Check out my latest projects

These are the applications and tools I love working on.

Temporary Email Service

Temporary Email Service

Cross-platform disposable email service with 70,000+ monthly web users and 19,000+ mobile downloads. Has processed over 1 million emails and generated 600k+ unique addresses to date. Monetized through Stripe subscriptions and ads.

React Native
Next.js
Expo
Node.js
Express.js
Shadcn UI
Stripe
PD2 Tools

PD2 Tools

Analytics platform for a Diablo 2 private server community with 27,000+ monthly users and $1,200+/month in ad revenue at seasonal peaks. Features include character and meta analysis, economy tracking, trade listings and other game information. Integrated the OpenAI API to parse unstructured trade posts into normalized price data for market analysis.

React
Node.js
Express.js
PostgreSQL
Mantine UI
OpenAI API
Redis
Costco Sale Tracker

Costco Sale Tracker

Price tracking application for Costco products with 3,000+ monthly users. Automated daily scraping with Puppeteer, using proxy rotation and randomized delays to handle anti-bot measures. Displays historical price trends and sale patterns.

React
Node.js
Express.js
SQLite
Puppeteer
Material UI
Contact

Get in Touch

Want to chat? Just shoot me an email at cole@coleestrin.io and I'll respond whenever I can.