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Yipjunwei/README.md

Hey, I'm Jun Wei

Computing Science undergrad at SIT, I build systems that automate the boring stuff and make businesses run smarter.

I'm drawn to the intersection of cloud architecture, fintech, and workflow automation. Give me a messy manual process and I'll turn it into something structured, scalable, and serverless.


About Me

  • Computing Science @ Singapore Institute of Technology
  • Software Developer & Product Owner (Contract) — building cloud-based automation systems
  • Reduced a client's manual accounting workload by 90% through full-stack payment automation
  • Deep interest in financial systems, reconciliation logic, and event-driven architecture
  • Based in Singapore

What I'm Building

Serverless payment automation    →   React + Node.js + AWS Lambda + S3
Fintech API integrations         →   HitPay payment processing
Event-driven reconciliation      →   Webhook validation + automated matching
WhatsApp notifications           →   Twilio API automation
Full-stack web applications      →   Performance-first, maintainable, production-grade

Tech Stack

Frontend React TypeScript JavaScript HTML5 CSS3

Backend Node.js Express

Cloud & Infrastructure AWS Lambda Amazon S3 AWS EventBridge

Database Supabase PostgreSQL


Key Project

Payment & Accounting Automation Platform

Serverless · React · AWS Lambda · HitPay API · Twilio · Supabase

Built a full-stack platform that completely automated a fleet rental company's billing and reconciliation workflow.

  • Integrated HitPay payment APIs for secure payment link generation and collection
  • Automated WhatsApp reminders via Twilio for outstanding invoices
  • Built webhook validation for real-time payment reconciliation
  • Cut manual accounting effort by 90%

GitHub Stats

Currently Exploring

  • Scalable backend architecture patterns
  • Cloud cost optimisation strategies
  • System design for high-reliability distributed systems
  • Fintech infrastructure and payment processing internals

Get In Touch

   


Always open to collaborating on meaningful projects, especially in system design, cloud architecture, and fintech. Let's build something useful.

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