👋 Hi, I’m Yap Wei Jun

Building useful
systems.

Software Engineer building AI-integrated business systems and browser-first agent tools.

with code, data, and curiosity

I turn messy business problems into simple, usable systems.

View My Projects Connect on LinkedIn
Available for new opportunitiesSingapore, SG
ERPSQLAI AgentsRAGMCPJavaScript
5+Years Experience
20+Projects Built
100+AI Experiments
ERPEnterprise Focus

Featured Projects

View all projects
Featured
Paperloom PDF editor showing its text editing panel with Edit Text, Images, Signatures, Export and Offline feature chips.

Paperloom PDF

A browser-based PDF editor with a custom TypeScript engine for editing text, images and signatures and exporting, all processed locally in the browser.

Developer Tool
Featured
ERP System demo showing a browser-based business dashboard.

ERP System

A browser-based ERP demo that runs shared domain logic in PGlite/WASM and stores demo data in browser IndexedDB.

ERP · Developer Tool
Featured
CSV Data Analysis Agent showing its browser-based data analysis interface.

CSV Data Analysis Agent

A browser-only React application for analysing CSV data, with no server required to run the deployed app.

AI · Data

Curious

Always learning and exploring.

Builder

Building practical solutions.

Problem Solver

Turning complexity into clarity.