LeetCode’s system design breakdown
A backend‑focused video breaks down LeetCode’s own system design—covering API design, async submissions, secure execution, AWS Fargate, and caching—posted by a systems practitioner this week posted with the full demo on YouTube. The walkthrough maps practical infra patterns that interviewers at big tech often test, from queuing to containerized execution. It’s a compact engineering blueprint for implementing scalable judge/exec systems.
Sameer Bhagtani published the walkthrough “How LeetCode Actually Works (System Design)” on YouTube on March 12, 2026 (video title and publish date shown in the upload metadata). youtube.com The video was created as an assignment for the ChaiCode Web Development Cohort and specifically thanks mentors ChaiCode, Hitesh Choudhary, and Piyush Garg in the description. youtube.com Timestamps embedded in the description mark “API Endpoints” at 03:05, “DB Entities” at 06:45, “Design” at 07:48, and a conclusion at 26:52, indicating a roughly 27‑minute step‑by‑step walkthrough. youtube.com Sameer links his GitHub in the video description (the repo/links are listed on his channel page) and maintains a developer blog, “Sameer’s Dev Log,” which archives related cohort work and posts. youtube.com
