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System Design

DynamoDB Hot Partitions: Why They Happen and How to Fix Them

A DynamoDB hot partition throttles your requests while the table still has spare capacity. Here are the per-partition limits, how to spot one, and six fixes.

Coding

LeetCode 75: All 75 Problems, 22 Topics, and What It Leaves Out

LeetCode 75 is LeetCode's free study plan: 75 problems in 22 topic groups, 22 Easy and 53 Medium, with zero Hard. Every problem mapped to the pattern that solves it.

Behavioral

How to Explain a Layoff or Career Gap in a Tech Interview

How to explain a layoff in an interview: state it in two factual sentences, say what you did next, then connect it to this role. Scripts for every case.

Tech Interview

LeetCode 75: All 75 Problems, 22 Topics, and What It Leaves Out

LeetCode 75 is LeetCode's free study plan: 75 problems in 22 topic groups, 22 Easy and 53 Medium, with zero Hard. Every problem mapped to the pattern that solves it.

Latest Blogs

LeetCode 75: All 75 Problems, 22 Topics, and What It Leaves Out

Arslan Ahmad

Arslan Ahmad

Oct 12th, 2026

DynamoDB Hot Partitions: Why They Happen and How to Fix Them

Arslan Ahmad

Arslan Ahmad

Oct 12th, 2026

Design an AI Agent: The 7-Layer Blueprint

Arslan Ahmad

Arslan Ahmad

Oct 6th, 2026

10 API Protocols Every Engineer Should Know

Arslan Ahmad

Arslan Ahmad

Oct 4th, 2026

TCS Job Levels Explained: C1 to SP1 and What Each One Pays

Arslan Ahmad

Arslan Ahmad

Oct 1st, 2026

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