Mar 10, 2026
Game of Agents: Why Building Multi-Agent Systems Feels Like a TV Drama
A practical reflection on building multi-agent AI systems, from defining roles and prompts to managing handoffs, latency, and token costs.
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Building practical AI products and systems
Shashank Rajak
AI Engineer, builder, and technical writer.
I design and build AI systems end to end, from product thinking and architecture to production workflows. I like software that is clear, useful, and quiet enough for the problem to stay in focus.
AI systemsAgentsCloud architectureWriting
Recent Writing
Notes from building and learning.
Feb 28, 2026
Code Isn't Cheap. It Costs Tokens
A survival guide to vibe coding, context curation, and managing AI agents in the inference economy.
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Sep 1, 2025
A Scalable System for Media Uploads and Serving
Handling media, such as images and videos, is a common requirement for any modern applications.
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Videos
Technical videos without the noise.
Curated explanations from my YouTube channel on AI, backend systems, and practical architecture.
32:27
AI / ML
Matrix Factorization Explained: How Netflix and Recommendation Systems Predict Ratings
A practical walkthrough of the math behind recommendation systems and why matrix factorization works.
16:22
Backend
Server-Sent Events: The Right Way to Do Real-Time
A focused explanation of where SSE fits, how it compares with other real-time patterns, and when to use it.
34:52
System Design
Media Handling System Design: A Comprehensive Guide
A system design breakdown for uploads, processing, storage, and serving media reliably at scale.
Selected Work
Systems, tools, and experiments with practical edges.
A focused set of projects across AI workflows, web products, and technical experiments.
View all projectsFine-Tuning Gemma 3 270M for Medical Reasoning
This project focuses on fine-tuning the Gemma 3 270M language model on a specialized medical dataset to enhance its reasoning and question-answering capabilities in the medical domain.
Chatbot Agent for Food Ordering
An AI agent that assists users in ordering food online with a user-friendly interface
RBAC RAG Chatbot - FinTech AI Assistant
A Role-Based Access Control (RBAC) RAG chatbot for FinTech applications
Edu Assistant - GenAI for Education
An ed-tech demo product using GenAI to help students learn faster with personalized content.
Focus
I like building at the intersection of systems and explanation.
AI systems
Designing workflows, retrieval layers, and application logic that make AI useful in production contexts.
Backend and cloud
Building reliable services, APIs, and deployment paths that keep product ideas practical.
Technical education
Turning dense engineering ideas into writing and talks that are clear enough to reuse.
Want to build something thoughtful with AI?
I am open to collaborations, product conversations, and technical writing opportunities.