SutradharLabs · Build & Test
Engineering Portfolio

Real Problems. Engineered Solutions.

A collection of high-performance web applications built with modern technologies. From AI agents to scalable e-commerce systems.

Operations Dashboard
ERP & IntegrationsLead Developer

Quote-to-cash on a single platform

Operations Dashboard

An internal ERP that runs an entire manufacturing operation on one system: lead capture through quotation, sales order, production tracking, invoicing and payment, alongside inventory, purchasing, double-entry accounting and banking. Nineteen modules with role-based access for sales, production, QC, accounts and R&D teams.

  • WhatsApp Business Cloud API: two-way inbox, template automation, AI assistant
  • Two-way Zoho Books sync for customers, estimates, invoices and items
  • Double-entry ledger with bank statement import and reconciliation
  • Gmail intake that reads enquiries straight out of the inbox
  • Next.js 16
  • MongoDB
  • Mongoose
  • NextAuth
  • WhatsApp Cloud API
  • Zoho Books API
  • Vertex AI
WhatsApp Business API & Marketing Automation
ERP & IntegrationsLead Developer

One inbox, thousands of conversations

WhatsApp Business API & Marketing Automation

Official Meta Cloud API integration built as its own platform: a two-way inbox the sales team works from all day, approved template broadcasts to segmented lists, and automated order, payment and delivery notifications triggered straight off the ERP. Built against Meta’s messaging policy from the start, because a business number that gets restricted takes the whole channel down with it.

  • Two-way inbox over Meta webhooks, with conversation assignment per agent
  • Approved template broadcast campaigns to segmented contact lists
  • Automated order, payment and delivery alerts triggered by ERP events
  • 24-hour customer service window tracked per contact, so replies never fail
  • AI assistant that drafts replies from the customer’s order history
  • Next.js 16
  • WhatsApp Cloud API
  • Meta Webhooks
  • MongoDB
  • Vertex AI
Kitchen: Restaurant Ordering System
BusinessFull Stack Dev

Three apps, one live database

Kitchen: Restaurant Ordering System

A working restaurant platform in three apps sharing one database: a public menu and ordering site, a staff CMS, and an Express + Socket.IO API. Publish a dish in the CMS and it appears on the customer menu instantly, with no refresh.

  • Real-time menu sync over WebSockets and MongoDB change streams
  • 128-dish menu with cart, checkout and table booking
  • JWT auth with staff roles for the admin CMS
  • API hosted on Render so WebSocket connections stay open
  • Next.js
  • React (Vite)
  • Express
  • Socket.IO
  • MongoDB
Hotel & Resort Booking Platform
BusinessFull Stack Dev

Commission-free direct bookings

Concept build

Hotel & Resort Booking Platform

A direct-booking site for hotels, resorts and homestays, with room inventory with live availability, date-range search, seasonal pricing and instant confirmation. Built so owners stop paying 15–20% commission to OTAs on every reservation.

  • Live room availability and date-range search
  • Seasonal and weekend pricing rules
  • Razorpay deposits with instant email and WhatsApp confirmation
  • Owner dashboard for bookings, occupancy and guest history
  • Next.js
  • MongoDB
  • Razorpay
  • WhatsApp API
  • Tailwind CSS
Clinic & Doctor Appointment Site
BusinessFull Stack Dev

Fewer no-shows, fuller schedule

Concept build

Clinic & Doctor Appointment Site

An appointment-booking site for clinics and independent practitioners: doctor profiles, consulting hours, online slot booking and automated reminders that cut no-shows.

  • Slot booking against real consulting hours
  • WhatsApp and SMS appointment reminders
  • Patient enquiry capture with follow-up tracking
  • Google Maps directions and click-to-call for local search
  • Next.js
  • MongoDB
  • WhatsApp API
  • Google Maps API
Travel Agency & Tour Packages
BusinessFull Stack Dev

Enquiries land in WhatsApp

Concept build

Travel Agency & Tour Packages

A tour operator site built around enquiry capture: browsable packages with day-by-day itineraries, seasonal pricing, a photo gallery per destination, and a quote request that lands straight in the operator's WhatsApp.

  • Package pages with day-wise itineraries
  • Enquiry form routed to WhatsApp instantly
  • Destination galleries with lazy-loaded images
  • Local SEO structure for 'tour packages in <city>' searches
  • Next.js
  • MongoDB
  • WhatsApp API
  • Cloudinary
DSAspire: DSA Practice Platform
AI & MLSolo Engineer

15,267 problems, live

DSAspire: DSA Practice Platform

A multi-user interview-prep workspace seeded with 15,267 problems mapped across LeetCode, Codeforces and Striver A2Z, organised into 17 topics and 163 algorithm patterns, with each user's progress tracked in isolation.

  • 15,267 seeded problems across curated sheets including Blind 75
  • Per-user progress isolation and analytics
  • WhatsApp study reminders driven by GitHub Actions
  • TypeScript in strict mode throughout
  • Next.js 15
  • React 19
  • TypeScript
  • MongoDB
  • Mongoose 8
Dreamora E-Commerce
Full StackLead Developer

200% Faster Load Times

Dreamora E-Commerce

A production-ready e-commerce platform built for high-volume sales. Features include real-time inventory management, secure Stripe payment processing, and a comprehensive admin dashboard for analytics.

  • Real-time Inventory Sync
  • Secure Payment Gateway
  • Admin Analytics Dashboard
  • Next.js 14
  • PostgreSQL
  • Prisma
  • Stripe API
  • Redux
Questivo AI EdTech
AI & MLSolo Engineer

10k+ Questions Generated

Questivo AI EdTech

An intelligent learning platform that uses Llama-3 AI agents to generate personalized quizzes for JEE/GATE aspirants. The system adapts to student performance in real-time.

  • AI Question Generation
  • Adaptive Difficulty Engine
  • Performance Heatmaps
  • React 19
  • Groq AI
  • Node.js
  • Tailwind v4
  • Python
Luxe Interiors
BusinessFrontend Architect

Award Winning Design

Concept build

Luxe Interiors

A visually stunning corporate portfolio for a high-end interior design firm. Focused on SEO domination and lead generation through elegant UI/UX design.

  • 3D Parallax Effects
  • Dynamic Case Studies
  • Automated SEO Meta Tags
  • Next.js
  • Framer Motion
  • GSAP
  • Sanity CMS
Urban Eats Manager
Full StackFull Stack Dev

40% Efficiency Boost

Concept build

Urban Eats Manager

A restaurant management system helping local businesses handle orders, table bookings, and delivery tracking in one unified interface.

  • Live Order Tracking
  • QR Code Menu System
  • Table Reservation Logic
  • React
  • Firebase
  • Google Maps API
  • Express
DataViz Dashboard
FrontendUI Engineer

Process 1M+ Records

Concept build

DataViz Dashboard

A complex analytics dashboard for visualizing large datasets. Uses D3.js and Recharts to render millions of data points smoothly.

  • Interactive Charts
  • Data Export (CSV/PDF)
  • Dark/Light Mode
  • React
  • TypeScript
  • D3.js
  • Material UI
Anwesha 2024: IIT Patna Fest
FrontendFrontend Developer

Campus-wide festival site

Anwesha 2024: IIT Patna Fest

The public site for Anwesha, IIT Patna's annual cultural festival, covering event schedules, registrations and sponsor pages, built to hold up under the traffic spike of a fest week.

  • Event schedule and registration flows
  • Built for burst traffic during the fest
  • Component-driven Next.js frontend
  • Next.js
  • React
  • JavaScript
  • CSS
SecureChat App
Full StackBackend Dev

<50ms Latency

SecureChat App

End-to-end encrypted messaging application. Built with WebSockets for sub-millisecond latency and absolute privacy.

  • E2E Encryption
  • Real-time Typing Status
  • File Sharing
  • Node.js
  • Socket.io
  • MongoDB
  • Redis

My Technology Stack

Tools I use to build scalable products

Next.js 16React 19TypeScriptMongoDBPostgreSQLNode.jsTailwind CSSPrisma ORMWhatsApp Cloud APIZoho Books APIVertex AIGoogle Workspace APIsVercelNext.js 16React 19TypeScriptMongoDBPostgreSQLNode.jsTailwind CSSPrisma ORMWhatsApp Cloud APIZoho Books APIVertex AIGoogle Workspace APIsVercel

Have a Project in Mind?

I am currently accepting new freelance projects and full-time opportunities. Let's discuss how we can engineer your vision into reality.

Available for Hire • 2026

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