Available for Opportunities

Hello, I'm
Paco Au-Yeung

Based in Hong Kong. Specializing in high-performance .NET systems, cloud migrations, and modern web architectures.

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Professional Experience

Senior Developer

ESD Service Limited

Oct 2023 - Present

Led full SDLC for Hang Seng Bank $1 Air Flight campaign (1700+ req/min, zero oversales).
Optimized Google Hotel API by migrating to .NET 8, increasing performance by 15% and cutting costs by 80%.
Migrated 20-year-old legacy VB.Net system to .NET 8, reducing response time from 3.5s to 400ms.
Cloud migration of 15 critical modules to AWS (ECS, DynamoDB, S3), boosting performance by 50%.
Pioneered adoption of Nuxt 3 & TypeScript for SEO-optimized pages, reducing infra costs by 96%.

Programmer

FromDB Limited

Jun 2022 - May 2023

Developed quotation & accounting module using Event Sourcing pattern (React + C#).
Created reusable React component library, improving development efficiency by 80%.
Overhauled multi-vendor ecommerce platform (Vue, NodeJS, MongoDB), increasing speed by 62%.

Featured Projects

PicS

Social Media Platform

A comprehensive social media application for mobile and web featuring user management, real-time messaging, posts, and video calls via PeerJS. Built on a scalable NoSQL architecture.

Flutter Firebase PeerJS

More on GitHub

Check out my repositories for open source contributions, experiments with new tech stacks, and more.

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Technical Arsenal

Languages

TypeScript

JavaScript

SQL

Java

Frameworks & Ecosystems

ASP.Net Core

Vue

Nuxt 3

NestJS

NodeJS

GraphQL

Spring

SAP Commerce

React

Infrastructure & Cloud

AWS ECS

DynamoDB

MongoDB

Docker

Serverless

Certifications

AWS Certified Cloud Practitioner

Amazon Web Services

May 2025

SI Associate Certification

MongoDB

Jan 2024

Education

City University of Hong Kong

BSc Computer Science

Sep 2021 - May 2023

Hong Kong Community College

Associate in Information Technology

Sep 2019 - Aug 2021

Hello, I'm Paco Au-Yeung