Krittanut

Open to work

Krittanut Sangsri

Full-stack developer

I build web and mobile products end to end. Below are things I've shipped — some live, some works in progress.

About

Full-stack developer with 4+ years of experience building web and mobile products end to end — from responsive Next.js / Angular front-ends to C# / .NET and NestJS back-ends. I like owning a feature from idea to production: I designed, built, and shipped Baanchao, a LINE-first rental manager now live with Thai landlords.

Frontend
ReactNext.jsAngularTypeScriptTailwind CSS
Backend
C# / .NETNestJSNode.jsPythonREST APIs
Data & Mobile
MongoDBSQLSwift / SwiftUI
Tooling
DockerPlaywrightGitSentry

Projects7

A LINE-integrated queue management SaaS for Thai restaurants and clinics — customers join from their phone, get pushed a LINE notification when their turn is close, and staff run the whole queue from a realtime dashboard.

  • NestJS
  • Next.js
  • Socket.IO
  • Prisma
  • LINE
Case study

A self-hosted bug reporter in the spirit of Jam.dev — a browser extension that captures DOM replay, console, and network traffic in one click, so a bug report arrives as a reproducible recording instead of a screenshot.

  • TypeScript
  • rrweb
  • Hono
  • Next.js
  • MV3
  • MCP
Case study

A LINE-first apartment manager for Thai small landlords — track rooms, tenants, and rent, auto-generate utility bills with PromptPay QR, and issue Thai-compliant receipts.

  • Next.js
  • NestJS
  • TypeScript
  • PromptPay
Case studyLive

Crypto & Stock Alert Bot

WIP

Automated alerting bot that watches markets and notifies on configurable price conditions.

  • Python
  • Trading
  • Automation

Polymarket Arbitrage

Archived

Research tooling for spotting arbitrage opportunities on prediction markets.

  • Python
  • Research

Sudoku

WIP

A clean, playable Sudoku game with difficulty levels.

  • TypeScript
  • Game

Thai Invoice Generator

WIP

Generate compliant Thai-format invoices and receipts in a few clicks.

  • Next.js
  • PDF