Vincent Ko
The University of Hong Kong | Computer Science | Hong Kong
LANGUAGES: Chinese (Native) English (Business) Japanese (Business)
"AI changes the world."
Introduction
"AI is powerful but only if you know how to use it"
- Backend
- Dev. of scalable microservice services
- Blockchain txns monitoring
- Developed AI agent for use company-wide
- Manage a team of ai agents with diverse skills
- Use AI to automate 90% of new blockchain development process
- Optimization resulting in 7x speed increase
Personal
- GenAI explorer (Gemini, Claude Code, Grok, Ollama, Hugging Face, etc.)
- LoRA LLM Fine-tuning with Unsloth
- Casual AI (YOLOv11, Stable Diffusion, Text 2 Speech)
- Code in free time. 30+ open source projects (see Github)
- Implemented from scratch as practice: HTTP/2 server, Socks5, SMTP
- Dev. Japanese Flash Card learning webapp with Java Spring Boot & VueJS (called JishoNotes)
FRONT: React.js Zustand Vue.js Flutter
BACK: TypeScript NestJS Spring Boot Python FastAPI C# Unity Go Fiber
INFRA: Redis PostgreSQL MongoDB PGvector Kubernetes Docker Compose Kafka Github Actions
CLOUD: AWS Azure Oracle
AGENT: LangChain LangGraph Spring AI RAG Claude Code Copilot
COMM: Jira Confluence Slack
Experience
Crypto.com
Backend & Agentic Systems Engineer
June 2024 - March 2026
Hybrid
AI Code Reviewer (Multi-Agent System)
- Designed & built a production-ready, scalable system on Horizontally Scalable AWS EC2 using FastAPI and Producer-Consumer architecture
- Orchestrated LangGraph Multi-Agent workflows for sequential file indexing (PGvector) and deep code analysis
- Developed specialized agents with tools for Multi-Repo referencing, symbol & file retrieval, RAG-based context injection and agent task delegation
- Implemented Interactive Repo Reviewer: A GitHub chat agent for vulnerability discovery via hybrid search (SQL & Vector)
- Integrated Summarizer Agent to report fixed code vs. new vulnerabilities and suggest repairs directly on GitHub
- Designed a React.js UI for full-detail vulnerability management and visualization
- Solved Long-Context issues via intelligent tool-usage and context summarization
- Engineered secure cross-repo referencing with strict permission handling and data isolation

- VP of SE: "Output is quite good. It found some hidden subtle bugs"
- Reported 100+ risky vulnerabilities not caught by Claude Code; achieved 7x speed increase
- Optimized AI agent workflows, reducing token usage by 40% while increasing throughput

Blockchain Security Software Development
- Primarily blockchain transaction monitoring (NestJS, Microservice)
- Monitoring txns for 1.2M+ monthly active users (of 100M+ users)
- Impl. software to enable high-speed communication with blockchain nodes
- Impl. software to track company deposits/withdrawals and trading volume
- Maintain and deploy 100+ repos 100% automatically with Claude Code Agents
- Responsible for heavy AI automation
- Prometheus, Grafana

- Successfully reported double spending and keep trading volume in check
- New chains are completed in 1 day with Claude Code and custom Agents

Common Tools
- AWS, PostgreSQL, Kubernetes, Docker Compose
- System design
- Note: Development includes Software Design, Implementation, Testing, Deployment
The University of Hong Kong
Software Developer (Intern)
June 2023 - August 2023 (3 months)
Hybrid
Email plugin to check for spam emails
- UI design and implementation with Vanilla JS & Webpack
- Backend API development with Express JS and spam checking functionality
- Google Doc as database
- Designing and implementing a backend system to allow users to use their own spam email list and other minor functionalities
Freelance Web Design and Development
Creator
November 2020 - December 2020 (2 months)
Remote Work
Small online e-commerce site
- Website design
- HTML, CSS & JS
Education
University of Hong Kong
Computer Science (2021 - 2024)
Hong Kong Institute of Vocational Education
Higher Diploma in Telecommunications and Networking (2019 - 2021)
Certification
eLearnSecurity Junior Penetration Tester
July 2021
Japanese Language Proficiency Test JLPT N2
January 2024
Scholarship
HKSAR Government Scholarship Fund - Endeavour Merit Award
2020 - 2021
HKSAR Government Scholarship Fund - Outstanding Performance 19/20
2019 - 2020
Personal Skills
Various tools and skills I learned & developed
Coding LANGs
Java
JS/HTML/CSS
Python
Go
C# (w/ Unity)
Swift
C/C++,PHP
Frontend
Vue.js
React.js
Flutter
Chrome
Extension
Backend
Spring Boot,
Spring Data, Security
Node JS,
NestJS
Python Flask, FastAPI, PyTorch
LangChain, LangGraph
Go Fiber
  • Infra
  • Kafka
  • MongoDB, Redis
  • PGvector, Milvus
  • MySQL, PostgreSQL
  • ElasticSearch
  • Kubernetes, Docker Compose
  • Github Actions
  • Specialized
  • Cloud
  • Linux (Ubuntu, Kali)
  • Penetration Testing
  • Unity 3D, Blender
  • Figma
  • Networking
  • Network Comm
  • Rest API
  • RPC
  • OAuth 2.0, OIDC, JWT
  • WebSocket
  • Webhook