mustansar.
Available for freelance work

Full-stack engineer building AI-powered products.

I design and ship production systems — Next.js frontends, NestJS and FastAPI backends, and LLM features that actually hold up under real traffic.

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  • 3+yrs building
  • 12+shipped projects
  • AI / RAGsystems
Portrait of Mustansar Hussain
  • AI Integration
  • IT Automation

What I do

From first sketch to production

Two disciplines, one engineer. Pick the piece you need, or hand me the whole thing.

Core focus

AI Integration

I help businesses and startups integrate AI into their websites, apps, and workflows. That includes smart chatbots trained on your own data and AI agents that automate repetitive work. Everything I build is secure, cost-efficient, and ready for real users.

  • RAG
  • Sementic Search
  • MCP Servers
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IT Automation

Stop doing the same task twice. Let reliable systems do it for you. I help businesses and teams automate repetitive IT work, from manual data entry and report generation to server setup, deployments, and backups.

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Need something custom?

Most projects mix a few of these. Tell me what you're building and we'll shape the scope together.

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Selected work

Things I've shipped

Products, platforms and AI features built end to end, from the data model up to the deploy pipeline.

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Featured

Next.js

Website for tech training provider startup

Built and deployed a full-stack website for a tech training startup using Next.js, TypeScript, and PostgreSQL. It includes a custom admin panel for managing client inquiries. The platform replaced the startup's manual workflows with a centralized digital system. This gave management real-time visibility into student and client data to support better planning and outreach.

  • Next.js
  • Nest.js
  • Typescript
  • Prisma
  • +2
Featured

Nest.js

Ecommerce Website Server

Built a RESTful e-commerce backend with NestJS, Prisma, and PostgreSQL for products, carts, and orders. It uses database transactions to keep checkout consistent and role-based access control (RBAC) to secure admin endpoints.

  • Nest.js
  • Typescript
  • Prisma
  • Postgres
  • +1

Why work with me

Engineering you can build on

Good software is less about the first release than the tenth. These are the habits that keep a product easy to change.

Start a project

Production-first

Everything is built to run under real traffic: tested, observable and deployable from day one.

One owner, end to end

Data model, API, UI and deploy pipeline in one pair of hands, so nothing gets lost between handoffs.

Clear communication

Written scopes, weekly progress you can click through, and straight answers when something changes.

Built to hand over

Readable code, documentation and a walkthrough, so your team can own the system confidently.

Toolbox

The stack behind the work

Proven, boring-in-the-best-way tools, chosen for systems that have to keep running.

Frontend

  • Next.js & React
  • TypeScript
  • Tailwind CSS
  • Accessibility

Backend

  • NestJS
  • FastAPI
  • PostgreSQL & Prisma
  • Auth & RBAC

AI

  • LLM APIs
  • RAG & vector search
  • AI agents
  • MCP

DevOps

  • Docker
  • CI/CD pipelines
  • Nginx & VPS
  • Monitoring

Writes

Latest writes

Notes on what I build and what I learn along the way.

All writes