About the Website
Welcome to my personal corner of the webđź‘‹.
This website is a living notebook — a place where I document my reflections on both the programming world and the physical world. It serves as a record of what I learn, what I struggle with, and what I find meaningful along the journey of becoming a better software engineer and a wiser person.
What You’ll Find Here
- Structured and detailed learning notes across a wide range of topics in computer science.
- A practical and battle-tested crackbook for LeetCode-style coding interviews.
- Some technical blogs, some reflective, and some simply honest snapshots of where I am at a given moment.
- Notes and reflections from books I read, spanning technology, philosophy, productivity, and other areas that shape how I think and work.
Why This Website Exists
This website exists as a form of learning documentation, public thinking, and a way of giving back to the community. Writing helps me slow down, sharpen ideas, and connect dots between code, systems, and life. If something here helps you learn, reflect, or see things differently, that is a welcome bonus.
Thanks for stopping by ❤️.
About the Author
Hi, I’m David Zhang, also known as hadjshell.
I recently graduated from King’s College London with a Master’s degree in Advanced Computing. I’m broadly interested in technical topics, with a particular focus on full-stack development and operating systems. I enjoy understanding how systems work end to end — from low-level abstractions all the way to user-facing applications.
Outside of programming, I enjoy staying physically active and exploring the world. You’ll often find me at the gym or playing basketball, road cycling, swimming, or traveling whenever time allows.
My favourite quote
Mind and hand.
I believe good thinking and good building reinforce each other — in code, and in life🫡.
Support This Site
If you’ve found something here helpful — a note that clarified a concept, a blog that resonated with you, or a perspective that saved you time — you’re welcome to support this site. This website is maintained independently as a long-term learning archive and a space for public thinking. All content is written with care, shared freely, and intended to give back to the community.
Donations are entirely optional, but deeply appreciated. Your support helps cover infrastructure costs and, more importantly, encourages me to keep writing, learning, and sharing. If you choose to contribute, thank you for being part of this journey. If not, you’re still very welcome here — and I hope something you read proves useful.
— David
