Technical Skills

The technologies and tools I work with to build modern applications

Java
Python
JavaScript
TypeScript
SQL
HTML
CSS

Work Experience

My professional journey and roles in the tech industry

Software Engineer (Volunteer)
Racial Justice Centre, Sydney
Nov 2024 - Present

Developed and maintained organization website using WordPress, Divi framework, and custom JavaScript/HTML/CSS. Administered Salesforce CRM system and provided comprehensive IT support. Delivered complete end-to-end fundraising solution and led website refactoring project that resulted in modernized user interface.

WordPress
Divi
JavaScript
HTML
CSS
Salesforce
Figma
Full Stack Developer & Solution Architect
KIDSFIRST, Sydney
July 2024 - Present

Independently architected and developed comprehensive AI evaluation platform using React, Next.js, and TypeScript. Implemented Role-Based Access Control (RBAC) system and built AI parameter management interface. Created red team testing framework and engineered dual evaluation system that reduced assessment time by 60%.

React
Next.js
TypeScript
RBAC
AI/ML
LLM
AWS
Solution Architect (Weekend Role)
KIDSFIRST, Sydney
Nov 2023 - June 2024

Provided strategic technical leadership during project initialization phase. Conducted technology feasibility studies and directed technology stack selection. Designed scalable AWS infrastructure and reviewed API designs and database schemas for outsourced teams.

AWS
System Architecture
API Design
Database Design
Senior Software Engineer
Shanghai Ninerun Network Technology Co., Ltd.
Nov 2021 - July 2024

Led development team for secondhand collectible trading application serving 100,000+ active users. Spearheaded customer service AI project utilizing LLM technology and microservices architecture. Architected monitoring infrastructure with 300+ custom metrics and refactored core trading module handling 3 million daily transactions.

Java 19
Spring Boot
Python 3
Flask
LLM
Vector Databases
Microservices
Grafana
Senior Software Engineer
Shanghai Lianshang Network Technology Co., Ltd.
Feb 2018 - Sep 2021

Designed core infrastructure systems for instant messaging application serving 2 million users. Led cross-functional collaboration to architect Content Moderation Platform and promoted to team lead. Orchestrated microservices architecture supporting high-throughput messaging infrastructure.

Java 8
Spring Boot
Dubbo
Microservices
API Gateway
Kafka
Software Engineer
BiliBili Inc.
Nov 2015 - Sep 2017

Designed and developed Java backend services for PGC platform serving 60 million daily active users. Enhanced notification system performance achieving 720x improvement and built real-time data processing pipeline for analytics using distributed architecture.

Java 8
Spring Boot
Kafka
Apache Storm
HBase
Microservices

Education & Certifications

My academic background and professional certifications

Education

Bachelor of Science in Computer Science
Shanghai University
2007 - 2011

Comprehensive program covering computer science, data structures, algorithms, and system design.

Certifications

  • AWS Certified Solutions Architect
  • Machine Learning

Get In Touch

Have a project in mind or want to discuss opportunities? Let's connect!

Contact Information
Feel free to reach out through any of these channels

royliu810@gmail.com

+61 413 157 517

Sydney, Australia

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