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Don C JohnPrincipal SoftwareEngineer

Based in Hyderabad, India. I build scalable AI systems, LLM-powered applications, and high-performance backend architectures.

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... /About me ...

Hello, I'm Don an AI-focused Full Stack Engineer. 6+ Years of Architecting AI Solutions.

Portrait of Don C John

Front-end

TypeScriptReactNextJsJestGraphQLReact NativePuppeteer

Back-end

NodeJsNestJsExpressFastifyPythonFastAPIPostgreSQLMongoDBRedis

Data Science

PythonPandasNumpyTensorFlowPytorchMatplotlibSeaborn

DevOps

NginxDocker(CI/CD)k8sBashGCPAWSAzure

Some of my favorite technologies,
topics, or tools that I worked with

Certifications

Google Professional Machine Learning Engineer

Google Professional Machine Learning Engineer

Google Cloud2025
Verify Credential
Azure Data Scientist Associate

Azure Data Scientist Associate

Microsoft2025
Verify Credential
Google Cloud Professional Architect

Google Cloud Professional Architect

Google Cloud2023
Verify Credential
Microsoft Azure Administrator

Microsoft Azure Administrator

Microsoft2021
Verify Credential
IBM Machine Learning Professional

IBM Machine Learning Professional

IBM2025
Verify Credential
IBM Data Science Professional

IBM Data Science Professional

IBM2021
Verify Credential
IBM Applied Data Science

IBM Applied Data Science

IBM2021
Verify Credential
Microsoft Associate: Python

Microsoft Associate: Python

Microsoft2019
Verify Credential

Projects

  • Enhanced E-commerce Platform

    A comprehensive full-stack e-commerce solution featuring real-time inventory tracking, seamless product management, and smooth user experience across all devices.

    • ReactJS
    • NestJS
    • Fastify
    • PostgreSQL
    • Redis
    • Microservices
    • Real-time
    • E-commerce
    Read case study: Enhanced E-commerce Platform

  • AI-Driven Customer Support Chatbot

    An advanced, AI-powered chatbot utilizing Natural Language Processing (NLP) to deliver intelligent, responsive customer support and enhance user engagement.

    • Python
    • TensorFlow
    • FastAPI
    • ReactJS
    • Vertex AI
    • NLP
    • Chatbot
    • ML/AI
    Read case study: AI-Driven Customer Support Chatbot

  • AI-Powered Job Candidate Matchmaking System

    AI platform matching candidates with jobs based on skills, experience, and preferences, enhancing transparency and hiring with machine learning.

    • Generative AI
    • Large Language Models (LLM)
    • Vertex AI
    • ReactJS
    • PostgreSQL
    • Python
    • AI Matching
    • Job Search
    Read case study: AI-Powered Job Candidate Matchmaking System

  • Intelligent Review Analyzer and Sentiment Classifier

    An intelligent tool that analyzes product reviews using AI to categorize sentiments, identify toxic feedback, and provide actionable insights to help product owners improve offerings.

    • Python
    • TensorFlow
    • FastAPI
    • ReactJS
    • Sentiment Analysis
    • AI
    • Review Management
    Read case study: Intelligent Review Analyzer and Sentiment Classifier

Interactive Labs

Explore the browser-native experiments behind the portfolio

Each experience runs as its own focused demo, from webcam ML and tracking to chat, notes, music, and playful microsites. How each one works →

Vision Lab

Background Remover

Live person cutout with selectable backdrops and in-browser vision segmentation.

Open demo

Conversational AI

Portfolio Chat

Ask about Don with answers grounded in the portfolio, or chat about anything with a small LLM running on your device.

Open demo

Tracking Demo

Face Mesh

Real-time facial landmark tracing powered by webcam input and browser ML.

Open demo

Interactive Game

Hand Catch

Two-hand webcam arcade game with falling targets, combos, and live detection.

Open demo

Music Experiment

Air Guitar

Pose-driven virtual instrument with live strumming, pitch control, and audio feedback.

Open demo

Decision AI

Smart Home

Natural-language control of simulated lights and a fan, decided by the Laya model running in your browser.

Open demo

Productivity

Smart Note

A polished note workspace with export tools, formatting controls, and fast writing flow.

Open demo

Seasonal Build

Xmas Greeting

A festive interactive microsite with personalized greetings and a lightweight holiday vibe.

Open demo

Work

  • 8 months
    Mouri Tech
    Principal Software Engineer - AI

    AI Engineer | Fullstack Developer

  • 4 years 4 months
    QBurst Technologies
    Senior SDE Data Science

    Data Scientist | Fullstack Developer

  • 1 year
    WebandCrafts
    Software Engineer

    Fullstack Developer | JavaScript & Python

Total work experience
6 years 0 months

Articles

Multi-Agent AI and the Future of Work

How generative AI, LLMs, and multi-agent systems are reshaping organizations—from reactive chatbots to coordinated swarms of autonomous agents.

Read more: Multi-Agent AI and the Future of Work

Modern E-commerce: Real-Time Inventory and Microservices

Building scalable commerce with React, NestJS, event-driven inventory, and service boundaries that survive traffic spikes and seasonal load.

Read more: Modern E-commerce: Real-Time Inventory and Microservices

Modern Customer Care with NLP and Vertex AI

Designing support bots that understand intent, escalate gracefully, and stay grounded in your knowledge base using Python, TensorFlow, and cloud AI.

Read more: Modern Customer Care with NLP and Vertex AI

AI in Recruitment: Matching Candidates Without Bias Drift

Using LLMs and structured retrieval to improve hiring efficiency while keeping human review, audit trails, and fairness guardrails in the loop.

Read more: AI in Recruitment: Matching Candidates Without Bias Drift

Let's Connect