Hello, I am Zayn
Hi, I’m Zayn Zheng — a software and data engineer with around 12 years of experience building systems where data meets product.
What I do
My day-to-day work revolves around Python, SQL, and data architecture. I’ve spent most of my career designing pipelines, modeling data, and building backend systems that quietly keep things running. I enjoy the craft of making complex systems simple and maintainable.
More recently I’ve been pushing into new territory — building mobile-friendly web apps, experimenting with AI tooling, and exploring the edges of what a small team (or one person) can ship quickly.
What I’m building
Right now I have two projects in flight:
- This site — a lightweight personal space for writing and self-introduction, hosted on Cloudflare Pages.
- A personal expense tracker — a mobile-first PWA that syncs with Google Sheets, supports custom categories, and lets family members share bills. Inspired by apps like 鲨鱼记账 but built exactly the way I want it.
Both projects are about scratching my own itch and learning something real along the way.
Why I’m writing
I’ve accumulated a lot of hard-won knowledge over the years — about building systems, picking tools, shipping things fast, and learning in public. Writing is how I organize that knowledge and give it somewhere to live.
I’ll write about:
- Data engineering patterns and practical Python
- Building personal tools and side projects
- Lessons from shipping things with limited time
If any of that sounds useful, stick around. I’ll be posting when I have something worth saying.