Full-Stack & AI Product Engineer

Sanwar Hussain

Three production platforms shipped solo, from architecture to deployment.

0+Years Experience
0Production Platforms Solo
0Supported Locales (Marg)
0+Lighthouse Budget target
// 01. Positioning

Engineered Solo. Delivered to Production.

Sanwar Hussain profile photo
Sanwar Hussain
Full-Stack & AI Product Engineer

Pre-AI-era fundamentals, force-multiplied by modern AI workflows. I build complete production products solo — designing the data layer, engineering backend services, crafting responsive UIs, and deploying cloud infrastructure without needing team handoffs or pre-existing playbooks.

Engineered Marg (hospital indoor navigation PWA with voice AI), CrewPilot (field ops platform), and Med Assist (AI medicine OCR assistant). I leverage tools like Claude Code, Cursor, and Copilot daily on top of 7+ years of core software engineering discipline.

Full System OwnershipArchitecture, DB, UI, APIs, and Cloud Deployment
AI Force MultipliedClaude Code, Cursor & Copilot daily workflow
Education
B.Tech in Information TechnologyNarula Institute of Technology, Kolkata
2014 – 2018 · GPA 7.85 / 10
// 04. Career Velocity

Engineering Timeline

Outcome-proven roles across full-stack engineering, performance optimization, and AI automation.

Lead Engineer — Marg (gomarg.in)

04/2026 – Present
Kolkata, India
  • Architected and engineered complete indoor navigation platform solo from zero to production deployment.
  • Evaluated three real-time voice assistant architectures before selecting and integrating Gemini 2.5 Flash for MargAI.
  • Implemented 7-locale i18n support, offline-first PWA caching, and dual-database indexing (Supabase relational + Pinecone vector RAG).
Next.js 16React 19TypeScriptSupabasePineconeGemini AI

Full Stack & AI Engineer

Freelance / Independent
08/2020 – Present
Remote (Kolkata)
  • Delivered production web and mobile software solo for clients, owning architecture, database schema, frontend UI, and deployment.
  • Designed agentic multi-step workflows with LangChain & LangGraph, embedding LLM automation directly into existing business processes.
  • Consulted early-stage products on performance optimization, API architecture, and rapid solo-velocity execution.
ReactNext.jsNode.jsTypeScriptLangGraphPythonFastAPI

MERN Stack Developer

ShoreWise Consultingvia Intelion Systems
02/2023 – 06/2024
Michigan, USA (Remote)
  • Reduced page load times by 15% across core product routes by refactoring legacy Next.js rendering paths and state flow.
  • Reduced HR candidate screening time by 30% through automated AI interview bot integrations.
  • Established engineering SOPs, code review guidelines, and standardized TypeScript interfaces across the codebase.
Next.jsTypeScriptReactReduxMongoDBSocket.io

Frontend Developer

10/2021 – 11/2022
Bengaluru, India
  • Achieved 20% reduction in load times and 15% uplift in user engagement across high-traffic D2C storefronts (mCaffeine, Borosil).
  • Engineered custom Shopify Liquid templates and Node.js middleware for seamless third-party app & analytics integrations.
  • Streamlined deployment workflows to cut client feature go-live timelines substantially.
Shopify LiquidJavaScriptHTML/CSSNode.js MiddlewareGit

Solo Engineer — Dateme App

Solo Venture
11/2022 – 02/2023
Bengaluru, India
  • Engineered cross-platform mobile dating application solo from prototype to store readiness in 3 months.
  • Built low-latency matching service using Node.js and Socket.io, paired with a React Native offline-tolerant state model.
React NativeNode.jsSocket.ioMongoDBRedux

Software Application Developer

AppradiusBackend Developer → Full-Stack Developer internal progression
02/2021 – 04/2021
Kolkata, India
  • Promoted from Backend to Full-Stack Developer within initial engagement period after delivering high-throughput MongoDB aggregation pipelines.
  • Built RESTful microservices in Node.js/Express and integrated them with responsive React/Next.js client portals.
Node.jsExpressMongoDBReactNext.js

Software Engineer — Frontend

07/2019 – 07/2020
Portland, USA (Remote)
  • Engineered core cross-platform mobile UX features in React Native for social food-discovery app.
  • Optimized mobile app data persistence layer (Realm) and introduced clean state management patterns.
React NativeTypeScriptRealm DBRedux
// 05. Reference Material

Technical Arsenal

Capability domains and technical tags used daily across production software engineering.

Frontend Engineering

Pixel-perfect, performance-critical web & mobile interfaces

TypeScriptReact.jsNext.js (App Router)Tailwind CSSRedux ToolkitShadCN UIReact Native

AI Coding Tools

Daily workflow force-multipliers built on foundation discipline

Claude CodeCursorGitHub CopilotWindsurf

AI / ML Systems

Production RAG, agentic LLM orchestration & multi-modal AI

LangChainLangGraphOpenAI APIGoogle Gemini 2.5 FlashGenkitOCR PipelinesPinecone Vector DB

Backend & Systems

Scalable APIs, real-time messaging & event-driven microservices

Node.jsExpress.jsFastAPI (Python)RESTful APIsSocket.ioMicroservicesSupabase

E-Commerce & Middleware

Custom storefront architecture and payment pipelines

Shopify / LiquidShopify REST & GraphQL APIsCustom Node.js MiddlewareStripe Integration

Infrastructure & DevOps

Containerization, cloud persistence & deployment target setup

DockerMongoDBGit / GitHub ActionsVercelAWS S3 / EC2WSL2 / Linux
// 06. Reach Out

Get in Touch

Open to full-time founding engineer roles, technical lead opportunities, and select freelance consulting engagements.

Kolkata, India (Remote Available)
Available for Opportunities