Sanwar Hussain

AI Product Engineer | MERN Stack Consultant

About Me

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Full Stack Engineer with 6+ years of experience building production-grade web, mobile, and backend systems using the MERN stack. I specialize in performance-critical React and Next.js applications, scalable Node.js services, and clean, maintainable architecture. Over the past year, my focus has shifted toward applied AI systems — designing Retrieval-Augmented Generation (RAG) pipelines, orchestrating multi-step LLM workflows using LangChain and LangGraph, and integrating Python-based AI services into real-world products. Currently, I do freelance and fullstack consulting, mostly indulged in genAI workflow.

My Projects

Featured
CrewPilot

Symphony for Your Field Operations. CrewPilot brings tasks, team communication, and incident reporting into one beautifully synchronized, real-time platform.

Next.js
TypeScript
Tailwind CSS
MongoDB
Redux
Socket.io
Mongoose

My Expertise

AI Product Engineering
Agentic systems, LangGraph workflows & AI-powered products
  • Design and build agentic AI systems using LangGraph and modern LLM tooling
  • Production RAG pipelines with evaluation loops and structured outputs
  • Multi-agent workflows for automation, content generation and reasoning
  • LLM orchestration with deterministic prompts and schema-driven outputs
  • AI features integrated directly into real-world SaaS products
Frontend Development
High-performance interfaces with React & Next.js
  • Modern frontend applications using React, Next.js and TypeScript
  • Pixel-perfect responsive UIs across desktop, tablet and mobile
  • Component-driven architecture with reusable design systems
  • Optimized rendering, code splitting and performance tuning
  • Robust state management and API integration patterns
Backend Development
Scalable Node.js services and distributed compute systems
  • REST APIs and backend services using Node.js, Express and TypeScript
  • Modular backend architecture with strong typing and validation (Zod)
  • Database design and optimization with MongoDB and document schemas
  • Distributed job pipelines for AI workloads and media processing
  • Containerized services using Docker with scalable deployment patterns
Mobile Development
Cross-platform apps with React Native
  • Cross-platform mobile applications for Android and iOS
  • Shared codebases with reusable component architecture
  • Near-native performance and smooth UX interactions
  • API-driven mobile architectures with scalable backends
  • Production deployment workflows for mobile releases

Work Experience

AI Full-Stack Engineer & Consultant

Freelance
Jun 2024 - Present

MERN Stack Developer

Shorewise
Feb 2023 - May 2024

Frontend Developer - Shopify

Marmeto
Oct 2021 - Nov 2022

Software Application Developer (Full Stack)

Appradius
Dec 2020 - Apr 2021

Frontend Engineer

Slurpalicious
Jul 2019 - Jul 2020

Technical Arsenal

A comprehensive overview of my technical proficiencies, categorized by domain.

Core Engineering

JavaScript (ES6+)
TypeScript
React
Next.js (App Router)
Node.js
REST API Design
System Design (Scalable Applications)
Authentication (JWT, OAuth, NextAuth)
API Architecture & Modularization

Backend & Data Layer

Express.js
MongoDB
Mongoose
GraphQL
Webhooks & Event-Driven Workflows
Async Job Processing
API Security & Rate Limiting
Database Schema Design

Frontend Architecture & UI

Tailwind CSS
Component-Driven Architecture
Responsive Design
React Native
Performance Optimization
SEO & Web Vitals
State Management Patterns

AI Systems & Python

Python
LangChain (v1.0)
LangGraph
FastAPI
RAG Architecture
Prompt Engineering
Structured Outputs (Zod / JSON Schema)
LLM Evaluation & Observability
Async AI Pipelines

DevOps & Infrastructure

Docker (Multi-stage Builds)
Kubernetes (Job-Based Workloads)
CI/CD (GitHub Actions)
GCP (Cloud Storage, IAM)
Linux / WSL2
GPU Workloads (Cloud NVIDIA L4)
Environment & Deployment Strategy

Commerce & Integrations

Shopify
Liquid
Payment Gateway Integrations
Third-Party API Integrations
Webhook-Based Payment Systems

Get In Touch

I'm always open to discussing new projects, creative ideas, or opportunities to be part of an ambitious vision.