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Top Rated Plus on UpworkAvailable for new projects

Agentic AI & Full Stack SaaS Engineering

I design and ship production-grade AI agents and SaaS platforms for founders and teams who need software that works on day one — not after six months of rework.

Projects Delivered
30+
Clients Served
15+
Years Building
3+
Upwork Standing
Top Rated Plus
Hassan Zaib
Top Rated Plus on Upwork
Top 3% of talent on Upwork
30+
Projects Delivered
15+
Clients Served
3+
Years Building
Top Rated Plus
Upwork Standing
Selected work

Platforms built, shipped and still running

Production systems delivered for founders and teams across AI, SaaS, e-commerce and healthcare.

Reflexware screenshotFeatured
AI SaaS Platform

Reflexware

AI-powered SaaS for modern businesses. A comprehensive platform that leverages machine learning to streamline operations and surface the work that actually needs attention.

AI automation across core business workflows
ReactNode.jsAI/MLMongoDBAWS
Sports Replay Now screenshotFeatured
Sports Analytics

Sports Replay Now

Custom playbook, stats, and notes platform for sports teams, with advanced analytics, collaborative playbook creation, and per-game statistics tracking.

Playbooks, stats and film notes in one workspace
ReactNode.jsMongoDBExpressChart.js
Neumandat screenshotFeatured
Full Stack Web App

Neumandat

Next.js and Firebase full stack build — a modern client-facing application engineered for fast loads, strong SEO, and a maintainable codebase.

Server-rendered front end with real-time Firebase data
Next.jsFirebaseTypeScriptTailwind CSS
Vintage LeftOver screenshot
E-Commerce

Vintage LeftOver

Retro fashion marketplace built on the MERN stack, with catalogue management, cart, and Stripe checkout wrapped in a modern shopping experience.

Full storefront with Stripe checkout
ReactNode.jsMongoDBExpressStripe
Chiisana Labs screenshot
Healthcare Portal

Chiisana Labs

Pharmacy management portal covering inventory, prescriptions, and patient records, with JWT-secured role-based access for staff and pharmacists.

Inventory, prescriptions and patients in one portal
ReactNode.jsMongoDBExpressJWT
Neu Appliances screenshot
E-Commerce

Neu Appliances

Full stack appliance marketplace with product catalogue, cart, Stripe payments, and an order management dashboard for the operations team.

Storefront plus internal order management
ReactNode.jsMongoDBExpressStripe
Services

What we build for clients

Senior-led engagements scoped around a clear outcome, with a fixed price and a delivery date agreed up front.

Agentic AI Systems

Autonomous agents that do real work — research, triage, data entry, customer support — wired into the tools your team already uses.

  • Multi-agent orchestration
  • Tool & API integration
  • Human-in-the-loop controls
  • Evaluation & guardrails

SaaS Platform Development

End-to-end SaaS builds: multi-tenant architecture, billing, role-based access, and an admin surface your team can actually run.

  • Multi-tenant architecture
  • Stripe billing & subscriptions
  • Role-based access control
  • Usage metering & analytics

Full Stack Web Applications

Fast, accessible, SEO-ready applications built on Next.js and Node — from first wireframe to production deployment.

  • Next.js & React front ends
  • Node & REST/GraphQL APIs
  • MongoDB & PostgreSQL
  • Core Web Vitals tuning

RAG & Knowledge Systems

Turn your documents, tickets, and internal wikis into an assistant that answers accurately and cites its sources.

  • Document ingestion pipelines
  • Vector search & reranking
  • Citation-backed answers
  • Private & on-prem options

AI Integration & Automation

Drop AI into an existing product without a rewrite — chat assistants, classification, summarisation, and workflow automation.

  • LLM API integration
  • Workflow automation
  • Cost & latency optimisation
  • Streaming interfaces

Technical Consulting

Architecture reviews, build-vs-buy calls, and delivery planning for teams who need a senior opinion before committing budget.

  • Architecture review
  • Technology selection
  • Code & security audit
  • Delivery roadmapping
How we work

A delivery process with no surprises

Every engagement follows the same five stages, so you always know what is happening now and what comes next.

  1. 01

    Discovery

    2-4 days

    We map the problem, the users, and the constraints. You get a written scope with a fixed price and a delivery date before any code is written.

  2. 02

    Architecture

    3-5 days

    I design the data model, service boundaries, and AI pipeline, then walk you through the trade-offs so the technical decisions are yours too.

  3. 03

    Build

    2-8 weeks

    Weekly demos on a live staging URL. You see working software every week, not status reports, and course corrections stay cheap.

  4. 04

    Launch

    3-5 days

    Production deployment, monitoring, CI/CD, and a load-tested release. Documentation and a recorded handover session come as standard.

  5. 05

    Support

    Ongoing

    A 30-day warranty on everything I ship, with optional retainers for ongoing features, scaling work, and model upgrades.

Hassan Zaib
Hassan Zaib
Agentic AI & Full Stack SaaS Developer
Islamabad, Pakistan
About

Senior engineering, without the agency overhead

I am an Agentic AI and Full Stack SaaS developer with a proven track record of delivering production software that teams actually depend on. As a Top Rated Plus freelancer on Upwork — a standing held by the top 3% of talent on the platform — I have helped founders and companies turn rough ideas into scalable, revenue-generating products.

My work covers the full delivery lifecycle: autonomous AI agents and retrieval systems, multi-tenant SaaS architecture, payment and subscription infrastructure, and the interfaces that make all of it usable. I work in small, senior-led engagements where you talk directly to the person writing the code.

Every project ships with documentation, a deployment pipeline, and a handover session — because software you cannot maintain is not finished.

  • Direct access to the engineer writing your code
  • Weekly demos on a live staging environment
  • Documentation and handover included as standard
  • 30-day warranty on everything delivered
Capabilities

The stack behind the work

The tools and disciplines used day to day across AI engineering, product development and infrastructure.

AI & Agentic Systems

  • LLMs (GPT, Claude, Llama)
  • Agentic AI Systems
  • LangChain
  • CrewAI
  • AutoGen
  • MCP (Model Context Protocol)
  • OpenAI API
  • Groq API
  • RAG Systems
  • Prompt Engineering

Frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • Redux
  • Framer Motion

Backend

  • Node.js
  • Express.js
  • REST APIs
  • GraphQL
  • JWT
  • Socket.io

Data & Storage

  • MongoDB
  • PostgreSQL
  • Redis
  • Mongoose
  • Prisma

DevOps & Cloud

  • Docker
  • AWS
  • Git
  • CI/CD
  • Vercel
  • Heroku

SaaS Architecture

  • Multi-tenancy
  • Payment Integration
  • Subscription Management
  • API Design
  • Microservices

Technologies we build with

  • Next.js
  • React
  • TypeScript
  • Node.js
  • Python
  • MongoDB
  • PostgreSQL
  • Redis
  • LangChain
  • OpenAI
  • Docker
  • AWS
  • Tailwind CSS
  • Stripe
  • Vercel
AI assistant

Ask anything, get an answer now

A retrieval-backed assistant trained on this site's content — and a working demo of the kind of agent we build for clients.

Hassan's AI Assistant
Online

Hi — I'm Hassan's assistant. Ask me about services, past projects, the delivery process, or how to get a quote.

Press Enter to send, Shift + Enter for a new line. Answers are AI-generated — confirm anything important by email.

Have a project in mind?

Tell us what you are building. You will get a written scope, a fixed price, and a delivery date — usually within two working days.

Top Rated Plus on Upwork · Islamabad, Pakistan

Contact

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Emailhassan.zaib223@gmail.comPhone+92 308 5504450
LocationIslamabad, Pakistan
Response timeWithin 1 business day
Top Rated Plus on Upwork

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