Ranjan Kumar
AI & ML Engineer · Author · Educator
I help AI builders design, build, and ship production-grade AI systems that actually work, cost-effectively, through hands-on writing, books, and practical engineering guidance.
Latest Posts
View all →Validation Layer Design: Building the Reflex That Catches What the Model Gets Wrong
The model will produce malformed output. Not occasionally - regularly. The Validation Layer is the only thing standing between that malformed output and your downstream systems.
ai-engineeringState Management for Agentic Systems: How to Build Agents That Don't Start Over
A long-running agent without state management is a gamble. You're betting the entire task completes before something goes wrong. At production scale, that bet loses constantly.
ai-engineeringRetry, Fallback, and Circuit Breaking: Building LLM Infrastructure That Survives Outages
Your LLM provider will have an incident. The question is not whether your system fails when that happens - it's whether you designed for it beforehand.
ai-engineeringNormalization and Input Defense: Hardening the Entry Point of Your LLM System
Every unreliable LLM system has a porous entry point. Here's how to build the layer that ensures the model only ever sees clean, controlled, safe input.
My Books
The ChatML Handbook
Structured Prompting & LLM Conversations
Learn how to structure prompts using ChatML for predictable, production-ready LLM behavior.
Building Real-World Agentic AI Systems
From Prototypes to Production
A practitioner's guide to designing, deploying, and operating reliable agentic AI systems in the real world.
My Toolkit
A collection of tools I've built to boost productivity and simplify workflows.
Developer & AI Tools
MedhaV - मेधावी
Start every day with clarity
Imagelly
AI-Based SaaS Image Edit/Enhancement Tool
Mermaid Diagram Generator
Create flowcharts, sequence diagrams, and more
MermAniSt — Mermaid Animation Studio
Turn Mermaid diagrams into animated presentations
LinkedIn Text Formatter
Format your LinkedIn posts with bold, italic, and more
MarkMelon: Markdown Editor
Edit, generate docs from Markdown and more
Slides Creator from Markdown
Generate beautiful presentations from Markdown
What I Write About
AI & ML Engineering
Production-ready AI systems, LLMs, and machine learning deployment strategies.
System Design
Scalable architectures, distributed systems, and infrastructure for AI applications.
Real-World Projects
Case studies, lessons learned, and practical insights from production deployments.