About Tech Brushup

Tech Brushup is a personal study reference built for experienced engineers who want to move fast. The goal is fast, targeted revision before interviews — not learning from scratch.

How It Was Built

The content started as personal notes taken while working through coding patterns and system design concepts. Those notes were written in Markdown, then organised and built into this site using Claude Code — Anthropic's AI coding tool — which helped structure content, generate and fix solutions, and build the static site generator.

All content has been reviewed and curated multiple times. The solutions, explanations, and design decisions reflect personal understanding — not raw AI output.

Study Sources

The material on this site draws from years of studying across multiple resources:

• AlgoExpert — coding patterns and problem walkthroughs
• Educative.io — system design and coding courses
• HelloInterview — system design and interview preparation
• LeetCode — problem references (Blind 75 list)

Problem names and numbers on the coding pages reference LeetCode. No problem statements are reproduced — only original solutions and explanations.

Tech Stack

• Content written in Markdown
• Built with Node.js + marked + Prism.js
• Hosted on Cloudflare Pages
• Zero runtime dependencies — pure static HTML/CSS/JS