Blog

Backend engineering articles on distributed systems, databases, caching, and system design.

• When NOT to Use Node.js — The Decision Framework Senior Engineers Actually Use

  Aug 3, 2025 5 min read

  Node.js is powerful, but not universal. Learn when it breaks down, why it happens, and how senior engineers design around its limitations.

  • nodejs
  • architecture
  • system-design
  • backend
  • distributed-systems

• Your Node.js API Is Slow — But CPU Looks Fine. Here’s the Real Bottleneck

  Jul 27, 2025 5 min read

  Low CPU usage doesn’t mean your Node.js API is fast. Learn how event loop lag, downstream latency, and hidden bottlenecks degrade performance.

  • nodejs
  • performance
  • event-loop
  • distributed-systems

• Threadpool Exhaustion in Node.js — The Silent Killer Behind Slow APIs

  Jul 20, 2025 5 min read

  How libuv's tiny threadpool can quietly throttle your Node.js APIs — and why scaling it blindly can make things worse.

  • nodejs
  • libuv
  • performance
  • backend
  • concurrency

• How to Freeze 10,000 Users With One Line of Code in Node.js

  Jul 13, 2025 5 min read

  A deep dive into how a single blocking operation can bring down an entire Node.js system — and why most engineers underestimate this risk.

  • nodejs
  • event-loop
  • performance
  • backend
  • distributed-systems

• The Hidden Priority System in Node.js: Why nextTick Can Starve Your Entire App

  Jul 6, 2025 5 min read

  Deep dive into Node.js microtasks, process.nextTick, and Promises — and how they secretly control execution order and can block your system.

  • nodejs
  • event-loop
  • javascript
  • concurrency
  • backend