Chan Ho Yin · Resume · Senior Full-Stack · Platform-Cloud

01 Summary

I design and ship production Cloudflare infrastructure with an AI agent as my pair-programmer, under guardrails I authored. 244 commits across 57 versioned releases, 1,130+ passing tests, zero unauthorized prod writes.

Most engineers in 2026 treat AI as autocomplete. I treat it as a junior engineer with checklists, dry-runs, audit logs, and a 5-source verification chain that catches fabrication. The flagship artifact is a live, edge-deployed taxi-rental operations app — but the real product is the workflow that makes AI-written code safe to ship.

02 Stack

Cloudflare

Workers · Pages · D1 · R2 · Cron Triggers · Edge computing · direct-upload deploys · env routing

Frontend

React 18 · TypeScript · Vite · Tailwind · shadcn/ui · accessibility

Backend

Hono · Drizzle ORM · SQLite · JWT auth · role-based access control

DevOps / SRE

Wrangler · GH Actions · dry-run + --confirm gating · audit logging · verification chains · incident response

Testing

Vitest · Playwright · Miniflare · TDD discipline · regression test ownership

AI orchestration

AGENTS.md authorship · rule-as-code · AI-written-code review flow · cross-session continuity

03 Selected Projects

An Agentic AI platform for AI programming — the rails that let AI ship safely.

🤖 Agentic AI Engineering Practice flagship

Runs inside Hermes Agent · what built cv-deck.pages.dev · what wrote the resume you are reading · what runs every commit on staging under guardrails I authored.

What it is — a working practice for letting an AI agent own the production codebase while a human owns the trigger. The two cards below are live demonstrations of the same practice.
Dev box — Linux 6.17 (Ubuntu 24.04, VMware VM), Python 3.11.15 venv (PEP 668 isolated — that's why it's a venv), Node 22.22, Git 2.43. Wrangler 4.100 lives at ~/.hermes/node/bin/wrangler (Hermes-managed, not global).
Agent runtime — Hermes Agent (Nous Research) as the primary coding agent. ~/.hermes/hermes-agent/AGENTS.md sets framework rules; the project adds its own AGENTS.md for repo-specific guardrails. Both load on session start.

🚕 Taxi Rental Management System flagship-product

staging · prod · github

What — single-tenant operations app for a Hong Kong taxi-rental company. Cloudflare Workers · Pages · D1 · R2 · Drizzle · Cron · $0 cloud bill · built under the guardrails above.

🛡️ AI Safety Harness meta-project

github.com/oscarhyc/taxi-rental

Dry-run + --confirm — every mutating command prints a plan and stops. --confirm is the only path to actually writing.
Audit log — every confirmed write appended to ~/.hermes/d1-audit.log, timestamped and attributed. Tampering is itself a Critical-Rule violation.
5-source verification — git log + git reflog + git ls-remote + CF Pages REST API + curl-bundle grep. All five must agree before a release is tagged.

Result: zero unauthorized prod writes across the entire project. The AI ships; humans own the trigger.

04 Experience

IT Assistant

Miramar Hotel and Investment Company Limited

2024 — Present

Provide first-line support and guide users through the resolution of technical problems.
Assist with the installation, configuration, and maintenance of desktop computers, laptops, and other IT equipment.

Independent · AI-Augmented Full-Stack Engineer

Self-directed · Taxi-rental platform + portfolio

2024 — Present

Authored and shipped a single-tenant taxi-rental operations platform for an HK taxi-rental company, using an AI agent as primary pair-programmer.
Owned every layer from D1 schema to Cloudflare Pages deployment.
Built the safety-infrastructure that allows AI agents to deploy to production with confidence (see AI Safety Harness, project §03).

Officer — Engineering

Kerry Logistics Network Limited

2018 — 2024

Six years operating production network infrastructure for a regional logistics firm. Routers, switches, firewalls, system backups, DR planning, hardware rollouts.

QA / QC Engineer

Hongkong United Reinforcement Engineering Ltd

2016 — 2017

Formation and implementation of quality management system. Set up internal control system for regulatory compliance (ISO 14001 / ISO 9001). Document and record control.

Project Coordinator

City Telecommunication Engineering Company Limited

2010 — 2014

Improved client satisfaction with timely updates and transparent communication throughout project lifecycle. Supervised multiple projects from start through delivery by prioritizing needs and delegating assignments.

05 Education

2022 — 2026

Higher Diploma in Information and Communications Technology (Part-time)
Vocational Training Council · Hong Kong
2009 — 2010

Master of Science in Material Science and Nanotechnology
City University of Hong Kong
2003 — 2006

Bachelor of Engineering in Material Science and Engineering
The University of Sheffield · United Kingdom
2001 — 2003

GCE A-Level · Dudley College · United Kingdom
2001 — 2003

HKCEE · St Louis School · Hong Kong

06 Languages

廣東話 (Cantonese)	Native
English	Fluent
普通話 (Mandarin)	Working