The PrepSync Blog
Interview prep & tech career guides
Honest, no-fluff advice on acing interviews, writing a CV that gets read, and landing tech roles across Nigeria and Africa.
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System Design Interview Questions You Must Know
A repeatable framework plus interview-ready answers to the questions that come up again and again — caching, load balancing, sharding, rate limiting, and how to design a URL shortener, news feed, and chat app.
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Coding Interview Patterns You Must Know
Stop grinding random problems. The 8 patterns — two pointers, sliding window, binary search, BFS/DFS, backtracking, DP and heaps — that solve most coding interview questions, with the signal that points to each.
From 1 to 1,000,000 Users: A System Design Story
How a simple app grows into a system that serves a million users — load balancers, caching, CDNs, read replicas, sharding and queues, explained step by step with diagrams.
Coming soon
How to answer "Tell me about yourself"
The 10 questions you’ll almost always be asked
Build a CV that passes the 6-second scan
System design interviews for beginners
How to practice coding interviews solo
Landing your first remote job from Nigeria
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