01/Sanwar Hussain — Full-stack & AI engineer

I turn complex ideas into working products.

I'm Sanwar Hussain, a full-stack and AI product engineer. I design and build software end to end—from system architecture and backend infrastructure to polished interfaces and AI-powered workflows.

Full-Stack Engineering · Applied AI · Product Architecture

Explore selected work Get in touch

Base: Kolkata, India · Remote
Focus: Web platforms · AI workflows
Elsewhere: GitHub/LinkedIn

Interconnected systems — architectural sketch

Portrait of Sanwar Hussain — Sanwar HussainKolkata / Remote

I approach software as a complete system. That means understanding the problem, making architectural trade-offs, building reliable data and service layers, designing the user experience, and getting the product into users’ hands.

My work spans full-stack applications, AI-assisted workflows, retrieval-augmented systems, and product engineering — including Marg (indoor navigation), CrewPilot (field operations), and Med Assist (medicine-scan prototype). I use modern AI tooling to accelerate development, while relying on engineering fundamentals to determine the quality of the result.

Systems: Architecture, data modeling, service layers, and deployment
Interfaces: Responsive web UI, PWA patterns, and accessible front ends
Applied AI: Retrieval-augmented systems, agent workflows, and tool calling

EducationB.Tech in Information Technology — Narula Institute of Technology, Kolkata2014 – 2018

02/Experience

Professional timeline

Seven years across employment, contract, freelance, and independent work — from storefronts and mobile apps to full-stack platforms with applied AI.

04/2026 – Present

Employment

Kolkata, India

Lead Engineer — Marg

Pascalblue Studio Pvt Ltd

Architected and built an indoor-navigation platform solo from zero to a live demo, owning front end, data layer, and deployment.
Evaluated three real-time voice architectures before integrating Gemini 2.5 Flash for the MargAI assistant.
Implemented 7-locale support, offline-first PWA caching, and dual-database indexing with Supabase and Pinecone for retrieval.

Next.js · React · TypeScript · Supabase · Pinecone · Gemini AI

08/2020 – Present

Freelance

Remote · Kolkata

Full Stack & AI Engineer

Freelance / Independent

Delivered web and mobile software for clients, owning architecture, database schema, front-end UI, and deployment.
Designed agentic multi-step workflows with LangChain and LangGraph, embedding LLM automation into business processes.
Advised early-stage products on API architecture, performance, and execution.

React · Next.js · Node.js · TypeScript · LangGraph · Python · FastAPI

02/2023 – 06/2024

Contract

Michigan, USA · Remote

MERN Stack Developer

ShoreWise Consulting· via Intelion Systems

Refactored legacy Next.js rendering paths and state flow across core product routes.
Contributed to an AI interview-bot integration reported to reduce screening time by 30%.
Established SOPs, code-review guidelines, and shared TypeScript interfaces across the codebase.

Next.js · TypeScript · React · Redux · MongoDB · Socket.io

10/2021 – 11/2022

Employment

Bengaluru, India

Frontend Developer

MARMETO

Built high-traffic D2C storefront work (including mCaffeine, Borosil) with attention to load performance and engagement.
Engineered custom Shopify Liquid templates and Node.js middleware for third-party app and analytics integrations.
Streamlined deployment workflows to shorten client feature go-live timelines.

Shopify Liquid · JavaScript · HTML/CSS · Node.js Middleware · Git

11/2022 – 02/2023

Solo venture

Bengaluru, India

Solo Engineer — Dateme App

Solo venture

Built a cross-platform mobile dating application solo from prototype toward store readiness in three months.
Implemented matching and low-latency messaging with Node.js and Socket.io, with an offline-tolerant React Native state model.

React Native · Node.js · Socket.io · MongoDB · Redux

02/2021 – 04/2021

Employment

Kolkata, India

Software Application Developer

Appradius· Backend → Full-Stack progression

Progressed from backend to full-stack responsibilities after delivering MongoDB aggregation work.
Built REST microservices in Node.js/Express integrated with React/Next.js client portals.

Node.js · Express · MongoDB · React · Next.js

07/2019 – 07/2020

Employment

Portland, USA · Remote

Software Engineer — Frontend

Slurpalicious

Built core cross-platform mobile UX in React Native for a social food-discovery app.
Improved the mobile persistence layer (Realm) and introduced consistent state-management patterns.

React Native · TypeScript · Realm DB · Redux

03/Selected work

Selected work. Built from real problems.

Three systems I designed and built end to end — each from a concrete problem, through architecture decisions, to a working product.

gomarg.in

Marg

Indoor navigation for complex public spaces.

Problem

GPS fails inside hospitals and large public institutions, leaving patients and visitors without a reliable way to find departments, counters, or floors.

Implementation

Solo-built platform (04/2026 – present): Next.js + TypeScript front end, MargAI voice assistant on Gemini 2.5 Flash after evaluating three real-time voice approaches, 7-locale support, offline-capable PWA, Supabase + Pinecone for community mapping and retrieval, contribution and redemption logic, and multi-role auth.

Next.jsReactTypeScriptSupabasePineconeGemini 2.5 FlashClerk

Live demo04/2026 – Present

Accessible and functional; under active development

Live product

Marg — mapping, PWA, and MargAI assistant views

crewpilot.pro

CrewPilot

A unified workspace for operational coordination.

Problem

Field teams coordinate tasks, assets, incidents, and dispatch across disconnected tools, which slows response and loses operational context.

Implementation

Operations platform covering task assignment, asset tracking, approval workflows, real-time messaging over Socket.io, and an AI assistant with Gemini Live voice for dispatch support.

Next.jsTypeScriptNode.jsMongoDBSocket.ioLangGraphGemini LivePWA

In developmentIn development

Actively being built

Live product

CrewPilot — operations workspace views

medassistapp.vercel.app

Med Assist

Exploring AI-assisted medicine information workflows.

Problem

Patients have difficulty reading medicine strips, understanding basic dosage information, and keeping a record of past scans.

Implementation

Prototype OCR-to-LLM pipeline: medicine-strip photo parsing, ingredient extraction, LLM-assisted dosage guidance, and encrypted scan history. AI-generated medical information requires verification and is not a substitute for professional medical advice.

Next.jsTypeScriptTailwind CSSNextAuthPythonFastAPIMongoDBGemini API

PrototypePrototype

Exploratory implementation demonstrating selected functionality

Live product Source

Med Assist — scan and analysis prototype views

Earlier work

Depth over quantity

Additional solo builds across mobile, realtime infrastructure, and AI systems.

Adshot AI

Prototype

Agentic media prototype for generating short social video ads via multi-step LLM workflows. Deployment deferred pending cloud GPU availability.

TypeScript·LangGraph·Python·FastAPI·Docker·

Jan 2026Live

Dateme

Archived

Cross-platform dating application built solo, with preference-based matching, real-time Socket.io messaging, and an offline-tolerant mobile state layer.

React Native·Node.js·Socket.io·MongoDB·Redux·

Nov 2022 – Feb 2023Code

04/Capabilities

Technical capabilities

Three areas I work in regularly — limited to technologies used in shipped work, client engagements, or demonstrated prototypes.

Full-Stack Engineering

React, Next.js, TypeScript, Node.js, API design, application architecture

React
Next.js (App Router)
TypeScript
Node.js
Express.js
RESTful APIs
Tailwind CSS
Redux Toolkit
React Native
ShadCN UI
Shopify / Liquid
Stripe Integration

Applied AI Engineering

LLM integration, retrieval-augmented generation, agent orchestration, structured outputs, tool calling

OpenAI API
Gemini 2.5 Flash
LangChain
LangGraph
Genkit
Pinecone Vector DB
OCR Pipelines
Claude Code
Cursor
GitHub Copilot

Data & Infrastructure

Databases, vector storage, authentication, deployment and observability

MongoDB
Supabase (Postgres)
Pinecone
Clerk
NextAuth
Docker
Vercel
AWS S3 / EC2
Git / GitHub Actions

05/Contact

Have a difficult problem to solve?

I'm interested in engineering challenges where thoughtful architecture, strong execution, and practical AI can make a measurable difference.

Let's talk Read résumé

Email: work.sanwar.hussain@gmail.com
GitHub: github.com/soloarcticwolf
LinkedIn: linkedin.com/in/sanwar-hussain
Location: Kolkata, India · Available for remote work