Skip to content
Vinod KumarFull stack · AI engineer
  • Home
  • Projects
  • About
  • Contact
  • Résumé
Résumé
Vinod Kumar

Full Stack Developer | AI Application Engineer

vinodvinni308@gmail.com

Navigate

  • Home
  • Projects
  • About
  • Contact
  • Résumé (PDF)

Elsewhere

  • GitHub (opens in a new tab)
  • LinkedIn (opens in a new tab)

© 2026 Vinod Kumar · Noida, India

About

I build full stack products and keep them running

Full stack developer in Noida with nearly 7 years of professional experience. I own application modules end to end within a development team, from React UI and Express.js APIs to PostgreSQL schemas, deployment and production support.

My recent work centres on SaaS products and on integrating AI so that the backend, not the model, decides what happens. Before that I built PHP, WordPress and Shopify sites for client CMS and e-commerce work.

Download résumé (PDF)See projects
Vinod Kumar in a navy blazer and white shirt
Vinod Kumar · Noida, India

Approach

How I work

  1. 01

    The backend stays in charge of AI

    Model calls run as a backend service layer. Output passes validation and business rules before it can be stored, published or shown.

  2. 02

    Clear contracts between client and server

    Explicit endpoint contracts, request validation and error handling keep React clients and Express services decoupled as features evolve.

  3. 03

    Own the module, end to end

    From the React UI and API to the PostgreSQL schema, deployment and production support for the parts I am responsible for.

  4. 04

    Root causes over workarounds

    Production defects get traced across browser, network, API, database and server until the actual cause is found.

Capabilities

What I work on

Five areas I work across, with the technologies I use in each.

  1. 01

    Frontend engineering

    Responsive React interfaces built on clear component boundaries and API contracts that stay decoupled as features change.

    • React.js
    • JavaScript (ES6+)
    • HTML5
    • CSS3
  2. 02

    Backend & REST APIs

    Express.js services with explicit endpoint contracts, request validation and error handling, plus third-party API integration.

    • Node.js
    • Express.js
    • REST API design
  3. 03

    AI / LLM integrations

    OpenAI and GPT calls run as a backend service layer. Agent workflows and MCP tools sit behind validation and business rules that decide what output may trigger.

    • OpenAI API
    • GPT models
    • AI agents
    • MCP servers
    • Prompt engineering
  4. 04

    Database-backed applications

    Schemas for application content, user data and workflow state, and fixing data issues that affect live applications.

    • PostgreSQL
    • MySQL
    • Schema design
  5. 05

    Deployment & production

    Node.js and PHP apps deployed and maintained on Linux servers, live sites migrated between providers, and defects traced from symptom to root cause.

    • Linux/Ubuntu
    • Nginx
    • Apache
    • AWS
    • DigitalOcean
    • k6

Stack

Technologies

Core full stack

  • React.js
  • JavaScript (ES6+)
  • HTML5
  • CSS3
  • Node.js
  • Express.js
  • REST API design
  • Third-party API integration
  • Git/GitHub
  • k6 (load testing)

AI application engineering

  • OpenAI API
  • GPT models
  • LLM integration
  • AI agent workflows
  • MCP servers
  • Prompt engineering

Databases

  • PostgreSQL
  • MySQL
  • Schema design
  • Query development

Infrastructure & deployment

  • Linux/Ubuntu
  • Nginx
  • Apache
  • AWS
  • DigitalOcean
  • Linode
  • Hostinger
  • DNS & domains
  • Server & site migration
  • Production troubleshooting

CMS / e-commerce

  • WordPress
  • WooCommerce
  • Elementor
  • Shopify
  • PHP

Exploring (not yet professional use)

  • MongoDB
  • JWT authentication
  • RAG
  • Embeddings & vector databases
  • Tool/function calling
  • LLM evaluation
  • Docker
  • TypeScript
  • System design

Experience

Nearly 7 years of shipping and running web applications

  1. Jun 2020 – Present

    Full Stack Developer

    Garage Productions Pvt Ltd, Noida

    • Own assigned application modules end to end within a development team, from React UI and Express.js APIs to PostgreSQL schemas, deployment and production support.
    • Integrate the OpenAI API and GPT models as a backend service layer, and build AI agent workflows and MCP integrations gated by server-side validation.
    • Deploy and maintain 15+ client applications on Linux servers across AWS, DigitalOcean, Linode and Hostinger; migrated 20+ live sites between providers.
    • Diagnose production defects across browser, network, API, database and server layers.
  2. Nov 2019 – Apr 2020

    Web Developer

    Connecting Dots Pvt Ltd

    • Delivered and maintained client WordPress websites, including customisation, content migrations, release updates and QA before handover.
    • Installed and administered Apache and Nginx servers, and set up domains and hosting for clients.

Contact

Have a product to build or an AI feature to ship?

I'm happy to talk about full stack engineering, product development or AI integration work.

Get in touchvinodvinni308@gmail.com