~/seandesmet.com

Sean DeSmet

Full stack projects

About

I build web applications end to end, from the database schema to the server they run on. I learn by building real things rather than following courses, and I run what I build in production: my own domain, HTTPS, and automated deployments.

Projects

Budget Buddy

live

Personal budget tracking and ledger system with analytics, recurring transactions, and dashboard.

Budget Buddy dashboard in dark mode, showing sample data: a net position of +$7,443.86 with a trend line, money in $24,152.42 and money out $16,708.56, 52% of a $1,730 monthly budget used, spending by category led by rent and groceries, and an AI-written summary of the month.
dashboard · sample data
  1. browser
  2. nginx + tls
  3. gunicorn
  4. flask
  5. postgresql

features

  • Transaction tracking
  • Recurring transactions
  • Analytics dashboard
  • Budget vs actual
  • CSV export
  • Dark mode

infrastructure

  • DigitalOcean Droplet
  • Nginx reverse proxy
  • Let's Encrypt SSL
  • Docker + Gunicorn
  • Automated deploys
  • Rate limiting
  • Python
  • Flask
  • PostgreSQL
  • Docker
  • Gunicorn
  • Nginx
  • DigitalOcean
  • Let's Encrypt
  • ApexCharts
GitHub Live site

Material List Import Tool

private

Turns a builder's takeoff — an Excel material list for a house — into a CSV the point-of-sale system can import. It matches free-text descriptions to item numbers, a person reviews every line, and a catalog learns from each confirmation so the same line never needs matching twice.

  1. upload
  2. parse
  3. match
  4. review
  5. csv

every confirmation teaches the catalog

first run · empty catalog

A 144-line house to import-ready CSV in 9 minutes, on 2 model calls, for 16¢ — with 99% of the AI's proposals accepted unchanged.

features

  • .xlsx, .xls and .csv upload
  • AI parsing; repeat layouts need no call
  • Catalog match first, AI only for the rest
  • Confidence-scored proposals
  • A person reviews every line
  • Reports: time saved, match rate, AI cost

engineering

  • Tests never call the real API (enforced)
  • Protected main, required CI checks
  • Non-root Docker image
  • Forward-only migrations
  • CSRF, rate limiting, CSV-injection guard
  • Python
  • Flask
  • PostgreSQL
  • HTMX
  • Claude API
  • Docker

private repository · not publicly deployed