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 →Small Language Models Are Not Smaller GPTs - They're Infrastructure
We've been asking the wrong question. The discourse around small language models is stuck in a benchmark comparison loop: Phi-3 vs. Mistral vs. LLaMA. Parame...
ai-engineeringFrom Unknown Codebase to Architecture Doc, Automated - Building the LangGraph Pipeline
Every engineering team eventually inherits a codebase with no architecture documentation. A new hire joins and spends three weeks mapping dependencies by readin...
software-engineeringFrom Unknown Codebase to Architecture Document: A Complete Practitioner's Guide
**Works with:** Any language · Any framework · Any architecture style **Stack-specific appendices:** Java/Spring/JSP · Python/Django/FastAPI · Node.js/Expres...
agentic-aiWhy Your AI Agent Finishes Tasks But Fails the Goal
For engineers building multi-step or long-horizon agents in production. Most developers who build multi-step agents treat the task list as a config artifact....
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.