Hey, I'm Gurshaan
I'm a CS student who loves designing and building meaningful things for the web. These days, I'm focused on creating SaaS products, websites, backends — and exploring whatever else sparks my curiosity.
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Git Under the Hood: What Actually Happens When You Commit
A deep dive into Git internals: objects, blobs, trees, commits, the index, HEAD, branches, refs, packfiles, reflogs, and what really happens when you run git commit.
One Token Isn't Enough: How Access + Refresh Token Auth Actually Works
A single long-lived JWT can't be both secure and convenient. Splitting it into a short-lived access token and a rotating, revocable refresh token is what makes logout, role changes, and theft detection possible at all.
Why Your Query Got Slow: How Database Indexes Actually Work
Without help, the database has no way to know where a row is without looking at all of them. An index is that help — a separate structure that tells the database where to look instead of scanning every row.