Contact →
Kaustav Karmakar Books on AI · Kolkata

AI that ships,
for leaders and builders.

By Kaustav Karmakar, Technical Lead and author. Two books on turning data into decisions and building production AI agents with TypeScript and Next.js.

Explore the books → See the experience
8+years building web products
2books on AI, out now
3books, including Dynamics of AI with LLMs

The books

Two books. Two jobs to be done.

One helps leaders decide what to do with data. The other helps developers ship AI agents.

Leadership Guide

Data-Driven AI Intelligence

A Leader's Guide to Turning Data into Decisions

KAUSTAV KARMAKAR

For leaders and decision-makers

Models are becoming a commodity. Your data is not. Learn to decide, ground, measure, govern, and learn from data so AI creates lasting advantage.

Buy on Amazon →
Practical Guide for JavaScript Developers

Building AI Agents with TypeScript & Next.js

Type safety, tools, agent loops, streaming UI, RAG, MCP, evals, deployment

KAUSTAV KARMAKAR

For JavaScript and TypeScript developers

Working code for building production AI agents in Next.js, from the first typed tool to deployment.

Buy on Amazon →

How I work

Pragmatic. Typed. Measured.

The same principles run through the books and the teams I lead.

01

Decide with data

Build the data foundation first, then let decisions follow what the numbers show.

02

Type everything

Type safety from the frontend to the agent's tools keeps AI systems predictable.

03

Ship to production

Evals, guardrails, CI/CD, and deployment are part of the build, not an afterthought.

Experience

8+ years of building and leading.

From full-stack builds to leading engineering teams on fixed-cost delivery.

  1. May 2022 – Present

    Technical Lead

    Capital Numbers Infotech · Kolkata

    • Lead cross-functional engineering teams and mentor developers.
    • Own frontend architecture using React, Next.js, and TypeScript.
    • Improve delivery predictability, estimation accuracy, and quality.
  2. Jun 2021 – May 2022

    Web Technologist

    Keystride Labs

    • Delivered Next.js and Node.js solutions for international clients.
    • Implemented CI/CD pipelines and deployment automation.
  3. Apr 2020 – Jul 2021

    Software Developer

    ZFunds

    • Developed scalable server-side rendered applications using Next.js.
  4. Jun 2019 – Nov 2019

    Senior Software Developer

    Vixplor Analytics

    • Built full-stack solutions using Node.js, AngularJS, and PostgreSQL.
  5. Dec 2017 – Mar 2019

    Full Stack Developer

    CapitalQuotient.com

Selected work

Products built for real constraints.

B2B Platform

Multi-Tenant Admin Portal (Intterra)

A secure platform built with Next.js, Node.js, PostgreSQL, and AWS, with role-based access control and reporting.

Blockchain

Blockchain Employee Verification Platform

Integrated Ethereum smart contracts with Next.js and Node.js services for automated verification workflows.

Toolkit

The stack behind the work.

React.jsNext.jsTypeScriptJavaScriptNode.jsExpress.jsREST APIsMicroservicesAWSDockerCI/CDGitHub ActionsPostgreSQLMySQLMongoDBSystem DesignTechnical LeadershipEthereum / BlockchainAI-Assisted Development

Education

Formal training, continued learning.

2017

B.Tech in Computer Science and Engineering

JIS College of Engineering, Kolkata

Certificate

Executive Post Graduate Certificate Program

IIT Kharagpur

Let's build something that ships.

LinkedIn GitHub kaustavkarmakar2@gmail.com
Start a conversation →