Flagship
Truss House
Full-stack engineer / 2026
Marketing site rebuild and customer-facing RAG chatbot for a housing technology company.
- Astro
- TypeScript
- Tailwind CSS
- Next.js
- RAG
- Keystatic
- Vercel
Full-Stack Product Engineer
I build products end to end.
Full-stack product engineer in Auckland, New Zealand. I work on AI-assisted products, typed content systems, and fast web applications.
Based in Auckland, New Zealand
I ship the small version first. AI tools speed up the 0 to 1, but judgment decides what survives.
Every project starts with one question: what is the smallest thing I can build to test this? Then I ship it, learn from it, and harden the parts that matter.
Selected work
Products, sites, and workflows I have shipped. Each links to the live build or source.
echo
Product engineer / 2025
AI-powered feedback loop for turning rough product ideas into sharper prompts, plans, and prototypes.
- TypeScript
- React
- Agents
my_app_maker
Full-stack engineer / 2025
Natural-language app builder that turns product descriptions into structured requirements and mock UIs.
- TypeScript
- React
- Node
- LLM
my-gtd-buddy
AI workflow engineer / 2025
Reminders-native GTD workflow powered by Claude Code skills for capture, review, and next-action planning.
- Claude Code
- Apple Reminders
- Automation
Recent writing
Notes on engineering, product development, and AI. Full archive on the blog.
May 27, 2026
The Spec Is the New Source Code
The shift I didn't expect The more I use coding agents, the less source code feels like the thing I personally write. I know. Strange sentence from so…
May 10, 2026
Git Worktree: The Feature I Knew About but Never Tried Until I Had To
The feature I kept ignoring I'd written about git worktree before, and I'd heard it come up in discussions about parallel workflows plenty of times. E…
May 4, 2026
Three Stages of an Agent Workflow: Prompt, Context, Harness
The mental model I want to talk about the way I currently think about agent workflows. Three stages. Each one solves a different problem, and you need…
Experience
Product engineering, internships, and CS foundations.
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Mar 2026 - Jun 2026
AI-Native Product Engineer & Full-Stack Developer at GrowLab Technologies
I ship internal tools and client apps full-stack, using a spec-driven workflow and AI agents to get from prototype to production fast.
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Oct 2025 - Dec 2025
Junior Developer at Decoded Venture Studio
Built a coding-agent platform end to end using spec-driven development. I designed the core agent on the OpenAI Agents SDK.
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Dec 2024 - Feb 2025
Software Engineer Intern at HALO Systems by Tag IT
Built a Vue.js and TypeScript HMI dashboard for farm effluent control, with real-time Mapbox and GeoJSON maps. The reusable SVG HMI component I made for it is still in production.
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Jul 2023 – Jul 2026
Bachelor of Computer and Information Sciences · Auckland University of Technology
Bachelor of Computer and Information Sciences at Auckland University of Technology.
Quick answers
Short profile facts for people, recruiters, and crawlers.
Who is Yushi Cui?
Yushi Cui is a full-stack product engineer in Auckland, New Zealand. He works on AI-assisted products, typed content systems, and fast web applications.
What does Yushi Cui build?
Yushi builds web products, AI-assisted workflows, Astro and TypeScript applications, React interfaces, and retrieval-augmented generation systems.
What technologies does Yushi Cui work with?
Yushi works with Astro, TypeScript, React, Node.js, Keystatic, static site delivery, AI agents, and retrieval-augmented generation workflows.
Where is Yushi Cui based?
Yushi Cui is based in Auckland, New Zealand, and works on product engineering, AI workflows, and full-stack web applications.