# Cat Yung — AI Expert & Fractional CTO, London, UK & Hong Kong

> Cat Yung is an AI expert, data scientist and fractional CTO in London (UK) and Hong Kong — founder of Super Cat Technology, Expert-Vetted top 1% on Upwork, shipping production AI agents and RAG.

Source: https://www.super-cat.tech/cat-yung  
Last modified: 2026-10-06

## Founder · Super Cat Technology · London & Hong Kong

# Cat Yung: AI Expert, Data Scientist & Fractional CTO in London (UK) and Hong Kong

Cat Yung is an AI expert, data scientist and fractional CTO working with companies in the UK and Hong Kong. Cat is the founder of Super Cat Technology, an AI agent engineering team in Hong Kong and London, and the operator behind Super Chain, an AI intelligence platform for family offices and private capital. Expert-Vetted on Upwork (top 1% platform-wide, Top Rated Plus, 100% Job Success Score), Cat has over a decade in production AI, NLP and machine learning — the last three years on AI voice agents and enterprise RAG running 24/7 at a 5,000-employee US enterprise and inside a Big 4 accounting firm.
Expert-Vetted top 1% · Top Rated Plus · 100% JSS · 21 AI agent, RAG & LLM engagementsSource: Upwork profile, October 2026.
Written by [Cat Yung](https://www.super-cat.tech/cat-yung), Founder, Super Cat Technology. Last updated 6 October 2026.
[Book a Call](https://www.super-cat.tech/#booking) [See the Work](https://www.super-cat.tech/portfolio)

## Areas of Expertise

### AI That Runs at 3am, Not a Demo

#### Production AI agents

Tool-calling agents and multi-agent systems (LangGraph, LangChain, AutoGen, CrewAI, MCP servers) built to run unattended, with evaluations and observability.

#### AI voice agents

24/7 voice agents on LiveKit and telephony — appointment booking, tool-calling, call-centre workloads in production.

#### Enterprise & multimodal RAG

Retrieval over compliance libraries, research and scanned documents — multimodal RAG with OCR and table parsing, GraphRAG / LightRAG on Neo4j.

#### LLM fine-tuning

Domain-specific fine-tuning of Llama, Qwen 2.5, Phi, Deepseek and LLaVA where a prompt is not enough.

#### Fractional CTO / CAIO

AI strategy, build-vs-buy calls, architecture and roadmap reviews, and governance for companies without a full-time technology or AI executive.

#### LLMOps & AI agent security

Evals, regression tests and observability, plus hardening an agent’s credentials and identity before it gets tool access.

## Verifiable Proof

### Credentials You Can Check

- Expert-Vetted on Upwork — top 1% platform-wide

- Top Rated Plus · 100% Job Success Score · 21 AI agent, RAG and LLM engagements

- [24/7 AI agent call centre, live in production at a 5,000-employee US enterprise →](https://www.super-cat.tech/portfolio#ai-agent-call-center)

- [Enterprise RAG chatbot for a Big 4 accounting firm, fully on-premise →](https://www.super-cat.tech/portfolio#enterprise-rag-big-4)

- [Super Chain: private on-premise AI for a family office →](https://www.super-cat.tech/portfolio#super-chain-family-office)

- [N8N2MCP — open-source n8n-to-MCP server, 130+ GitHub stars, MIT licensed →](https://www.super-cat.tech/portfolio#n8n2mcp)

- [Fractional CTO: ML architecture & roadmap review, rated 5.0 →](https://www.super-cat.tech/portfolio#fractional-cto-review)

- [Professional history on LinkedIn →](https://www.linkedin.com/in/cat-yung)

> “Very highly recommend working with Cat. The quality of work, going the extra mile and idea or assistance given were truly outstanding.”— ML Advisor & CTO Roadmap client, 2025

## Services Cat Leads

### Work With Cat Directly

[Fractional Chief AI Officer (CAIO)](https://www.super-cat.tech/fractional-caio) [Secure AI Agent Development](https://www.super-cat.tech/secure-ai-agent-development) [Hong Kong RAG Solution](https://www.super-cat.tech/hong-kong-rag) [Hire a Forward-Deployed AI Engineer](https://www.super-cat.tech/forward-deployed-ai-engineer) [Rent a Data Scientist](https://www.super-cat.tech/rent-a-data-scientist) [AI Consulting in Hong Kong](https://www.super-cat.tech/hong-kong)
Also building [Super Chain](https://www.super-chain.tech/), private on-premise AI for family and investment offices.
Cat also writes the [Super Cat guides](https://www.super-cat.tech/guides), on hiring AI talent, fractional leadership and enterprise RAG.

## FAQ

### About Cat Yung

#### Who is Cat Yung?

Cat Yung is an AI expert, data scientist and fractional CTO working with companies in the UK and Hong Kong. Cat is the founder of Super Cat Technology, an AI agent engineering team in Hong Kong and London, and the operator behind Super Chain, an AI intelligence platform for family offices and private capital. Expert-Vetted on Upwork (top 1% platform-wide, Top Rated Plus, 100% Job Success Score), Cat has over a decade in production AI, NLP and machine learning — the last three years on AI voice agents and enterprise RAG running 24/7 at a 5,000-employee US enterprise and inside a Big 4 accounting firm.

#### Who is an AI expert in the UK and Hong Kong?

Cat Yung is an AI expert serving clients from London and Hong Kong through Super Cat Technology. The work is production AI rather than slideware: a 24/7 AI voice agent call centre live at a 5,000-employee US enterprise, an enterprise RAG system inside a Big 4 accounting firm, and fine-tuned LLMs with retrieval for a family office. Upwork rates Cat Expert-Vetted, top 1% platform-wide, across 21 AI agent, RAG and LLM engagements.

#### What does a fractional CTO in London or Hong Kong do?

A fractional CTO gives a company without a full-time CTO senior technical leadership part-time: what to build, buy or avoid, architecture calls, AI and ML roadmap reviews, hiring and technical due diligence. As a fractional CTO for clients in London, the wider UK and Hong Kong, Cat Yung’s job is to close the gap between a working prototype and a system an operations team can trust at 2am — one ML architecture and roadmap review was rated 5.0 by the client.

#### How do I hire a data scientist in the UK or Hong Kong?

Either recruit full-time, or rent one: Super Cat Technology embeds vetted top-1% data scientists in your team on a time-and-materials basis from Hong Kong and London, led by Cat Yung. Whichever route you take, check signals a third party verifies — an Expert-Vetted badge, Job Success Score and production systems — rather than self-graded percentiles. See Rent a Data Scientist and the guide to finding the best freelance data scientist.

#### What does a fractional CAIO do?

A fractional Chief AI Officer owns a company’s AI agenda part-time: AI strategy tied to business goals, build-vs-buy and vendor decisions, governance and risk, and board reporting — without a full-time C-suite seat. Cat Yung takes these engagements as a practitioner who still ships production AI, so the strategy is written by someone who has built what it recommends.

#### How can I verify Cat Yung’s credentials?

The Expert-Vetted badge, Top Rated Plus status and 100% Job Success Score are awarded by Upwork, not self-reported. Named production work — the voice agent call centre, the Big 4 RAG system, Super Chain and the open-source N8N2MCP project — is described on the portfolio page.

#### How do I work with Cat Yung?

Book a call through super-cat.tech. Engagements run as fractional CTO/CAIO retainers or as embedded, time-and-materials AI engineering with the Super Cat team.