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Posts by Haider Zaman

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About Haider Zaman
Haider Zaman is a Full-Stack & Backend Engineer focused on ad-tech infrastructure, distributed systems, and CI/CD. He builds production programmatic advertising systems in Go and TypeScript — real-time OpenRTB bidders, identity resolution, and high-throughput data pipelines — and writes about DevOps, backend engineering, and developer tooling from hands-on production experience.
SQLite at the Edge: Why It’s Showing Up Everywhere
Posted inDatabases

SQLite at the Edge: Why It’s Showing Up Everywhere

For most of its life, SQLite was thought of as "the little database" — great for phones and desktop apps, not something you'd run a real web backend on. That…
Posted by Haider Zaman July 7, 2026
The Temporal API: A Sane Way to Handle Dates in JavaScript
Posted inJavaScript

The Temporal API: A Sane Way to Handle Dates in JavaScript

Every JavaScript developer has, at some point, fought with the Date object and lost. It is mutable, it counts months from zero, it silently accepts nonsense, and it has no…
Posted by Haider Zaman July 6, 2026
Passkeys Explained: The Beginning of the End for Passwords
Posted inWeb Development

Passkeys Explained: The Beginning of the End for Passwords

Passwords have been the weakest link in security for decades. We reuse them, we forget them, we get them phished, and no amount of "must contain a symbol" rules has…
Posted by Haider Zaman July 5, 2026
Retrieval-Augmented Generation (RAG) Explained for Developers
Posted inAI & Machine Learning

Retrieval-Augmented Generation (RAG) Explained for Developers

Ask a raw language model about your company's internal policies, last week's news, or the contents of your private documents, and you'll hit the same wall: it doesn't know. It…
Posted by Haider Zaman July 4, 2026
Building a Python command-line interface with argparse
Posted inPython

Writing Your First Python CLI with argparse

Sooner or later you write a Python script useful enough that you want to run it with different options instead of editing the code each time. That is the moment…
Posted by Haider Zaman July 3, 2026
Context Engineering: The Skill Replacing Prompt Engineering
Posted inAI & Machine Learning

Context Engineering: The Skill Replacing Prompt Engineering

For a couple of years, "prompt engineering" was the buzzword everyone chased — the art of phrasing a request just right to coax a good answer out of a language…
Posted by Haider Zaman July 2, 2026
SQL joins connecting two related database tables
Posted inDatabases

SQL Joins Explained with Real Examples

Joins are where SQL stops being a fancy spreadsheet query and starts being a real tool for working with related data. They are also where a lot of developers quietly…
Posted by Haider Zaman July 1, 2026
Building With Claude: A Developer’s Guide to the Anthropic API
Posted inAI & Machine Learning

Building With Claude: A Developer’s Guide to the Anthropic API

Plenty of developers have chatted with Claude in a browser and come away impressed. Fewer have taken the next step and wired that same intelligence into their own software. If…
Posted by Haider Zaman June 30, 2026
Agentic Coding: How AI Agents Are Changing Software Development
Posted inAI & Machine Learning

Agentic Coding: How AI Agents Are Changing Software Development

Something fundamental has shifted in how software gets written. A couple of years ago, AI in your editor meant autocomplete on steroids — helpful, but still line-by-line. Today, agentic coding…
Posted by Haider Zaman June 29, 2026
What Is the Model Context Protocol (MCP)? A Developer’s Guide
Posted inAI & Machine Learning

What Is the Model Context Protocol (MCP)? A Developer’s Guide

If you've spent any time around AI development lately, you've probably heard the term thrown around in nearly every conversation. The Model Context Protocol (MCP) has quietly become one of…
Posted by Haider Zaman June 28, 2026

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