Debmalya Bhattacharyya
Independent web developer in Kolkata. I replace the manual, fragmented parts of a local business — phone bookings, DM orders, spreadsheet admin — with one fast platform that customers actually use.
01// book a slot, confirm, notify02export async function createBooking() {03 const slot = await db.slots.lock('am-03')04 const booking = await db.bookings.insert({05 customer: lead.id,06 service: 'consultation',07 slot: slot.id,08 })09 await notify(booking) // instant email10 return booking // status: confirmed11}Websites
café, Restaurant & other developing businesses
Working Feilds
UI/UX, backend, DBMS, System Design, DevOps, Cybersecurity
Every engagement below is scoped, priced and delivered as one of four concrete outcomes — not as an open-ended pile of hours.
Stop taking bookings by phone.
Self-service scheduling with live availability, automated confirmations and a single dashboard for every enquiry. Built so your front desk stops being a bottleneck.
Sell without a marketplace taking your margin.
A storefront you own: catalogue, cart, checkout and order records on your own domain, with payments wired in and no per-sale rent to a third party.
Be found, load fast, look credible.
Structure, speed and technical SEO on an existing site — or a clean rebuild. Search-engine-ready markup, mobile-first layout and Core Web Vitals that hold up on a phone on 4G.
Put the spreadsheet in a real application.
Realtime dashboards, reporting tools and internal platforms. When your operations outgrow manual tracking, this is the layer that removes the double entry.
Every build below is grouped on the basis of its real stack and its real purpose: storefronts that sell, portals that run operations, models that read data, and live services that stay connected.
Showing the full archive across all four categories.
A gifting storefront with a full product catalogue, cart and checkout journey.
Business value
Orders arrive structured instead of through DMs. Supabase owns products, customers and order state, so the shop runs without someone manually reconciling messages.
A single-page ordering and enquiry portal for a local café, with a live menu and product catalogue.
Business value
A brand-presence build that converts browsing into a specific commercial ask — licensing, partnership or commission — rather than a generic contact form.
A single-page ordering and enquiry portal for a local café, with a live menu and product catalogue.
Business value
A brand-presence build that converts browsing into a specific commercial ask — licensing, partnership or commission — rather than a generic contact form.
A single-page brand presence site for a water-purification business, with a contact form and enquiry capture.
Business value
A simple, credible web presence that turns a phone number into a structured lead capture form, so enquiries arrive in a single place instead of scattered across WhatsApp and calls.
2nd place — Dev Your Web challenge, Techno International Newtown
A single-page brand presence site for a space exploration company, with a contact form and enquiry capture.
Business value
A simple, credible web presence that turns a phone number into a structured lead capture form, so enquiries arrive in a single place instead of scattered across WhatsApp and calls.
A single-page brand presence site for a hardware business, with a contact form and enquiry capture.
Business value
A simple, credible web presence that turns a phone number into a structured lead capture form, so enquiries arrive in a single place instead of scattered across WhatsApp and calls.
An interactive management portal replacing a static, form-heavy administrative interface.
Business value
A direct analogue of internal operations software: one authenticated surface for records, requests and status, instead of scattered spreadsheets and paper trails.
Built for a national build challenge at IIT Goa
A collaboration workspace where teams share work in progress and coordinate ownership in real time.
Business value
Shows the security-conscious build pattern: encrypted secret handling and role-scoped access, the baseline any business tool handling credentials needs.
An intelligent link-management system that auto-categorises saved resources.
Business value
Removes manual filing from a daily workflow — classification happens on ingest rather than through human sorting. Placed 2nd at a national build challenge hosted by IIT Ropar.
2nd place — IIT Ropar
A reporting app that ingests a marks spreadsheet and generates ranked results automatically.
Business value
The classic back-office win: a recurring, error-prone manual report becomes one upload and one button.
Built for a university project
A neural-network system for automated severity grading of diabetic retinopathy using weakly-supervised chained knowledge distillation.
Business value
Where accuracy is the product. The weakly-supervised approach cuts labelling cost — the practical constraint on any real clinical dataset.
A real-time threat-intelligence dashboard that streams news and surfaces emerging events.
Business value
Streaming ingestion plus LLM summarisation — the architecture pattern behind any "watch this feed and tell me what matters" business tool.
A privacy-first career coach running Google’s Gemma-2B model entirely in the browser via WebGPU.
Business value
No document ever leaves the device. Demonstrates on-device inference as a credible answer to the data-privacy objection that blocks enterprise AI adoption.
An automated exam-proctoring system that flags irregular behaviour from camera feeds.
Business value
Real-time detection with a false-positive budget — the constraint that decides whether monitoring is usable or just noise. Placed 2nd at a national build challenge hosted by BP Poddar Institute.
2nd place — BP Poddar Institute
Surface-crack detection across construction materials from images.
Business value
Visual inspection scaled past human throughput — inspection becomes a repeatable measurement instead of a judgement call.
Real-time facial emotion recognition from a live camera stream.
Business value
A signal layer for experience products — measuring how someone actually reacts rather than relying on a survey afterwards.
Lane-boundary detection from video frames for driver-assistance style feedback.
Business value
Pipeline engineering on video at frame rate — the same latency discipline real-time operational monitoring needs.
A forecasting model over historical price series, built during the Euphoria Genx engagement.
Business value
Time-series modelling end to end: feature engineering, validation discipline and honest reporting of where the model fails.
Real-time gesture recognition integrated with a live video feed, built at Indian Institute of Internship.
Business value
Turns a camera into an input device — the foundation for touch-free kiosk and accessibility interfaces.
Text-classification pipeline separating unreliable reporting from credible sources.
Business value
NLP classification with a clear pipeline — ingest, clean, vectorise, explain the verdict.
A persistent-socket messaging service delivered during the Tech Nest backend engagement.
Business value
The transport layer under every live feature — presence, notifications and instant updates without polling the server.
These builds span storefronts, internal portals, computer-vision models and real-time services. If yours looks like one of them, the scoping conversation is short.
Start a projectI have built inside six different engineering teams — backend services, ML pipelines, web products and application tooling. That range is the reason a single build can cover your storefront, your admin panel and your data layer without handing you off to three contractors.
Indian Institute of Internship
Artificial Intelligence
AI / ML Intern
Hand Gesture Recognition Using AI, integrated with computer vision
Euphoria Genx
Applied ML
ML Intern
Stock price prediction built in Python on historical market data
Tech Nest
Backend Engineering
Backend Development Intern
Real-time chat server with Node.js and Socket.IO
Skillbit Technologies
Frontend Engineering
Web Development Intern
Product landing pages and a custom video player component
KODBUD
Application Development
Java Development Intern
Library management, desktop utilities and interactive applications
Pinancle Labs
Artificial Intelligence
AI / ML Intern
Fake news detection and road lane detection pipelines
Frontend & Interface
Backend & APIs
Data & Storage
Automation & AI
My job is to translate complex technical architecture — Python services, database design, web infrastructure — into clear business value for the person paying for it. If you cannot explain what a feature earns you, it does not belong in phase one.
You always know what is being built, what it costs and when you will see it running. Working software goes on a staging link from the first milestone — you are never waiting weeks to find out what you bought.
Thirty minutes on how the business actually runs today — where enquiries arrive, what gets written down twice, and which manual step costs the most time. You leave with a scope and a fixed price, whether or not you proceed.
A written page-by-page plan: what each screen does, what data it stores, and what is explicitly out of scope for phase one. No open-ended hourly work.
The site goes onto a live staging URL early and stays there. You review working software at each milestone rather than waiting for a single delivery at the end.
Domain, hosting, analytics and search-engine setup, plus a walkthrough so your team can update content without calling a developer.
Fixed-scope pricing
Quoted before work starts. Additional phases are quoted and approved separately — never billed as an open-ended hourly block.
Milestone visibility
A staging link plus a short written update at each stage, so progress is something you can click, not something you are told.
Let’s talk about your business
Thirty minutes, no obligation and no sales script. Bring the process that annoys you most — the phone bookings, the spreadsheet, the enquiries that only live in a messaging app — and you will leave knowing whether a platform fixes it and roughly what that costs.
Prefer to skip the form? Reach me however is easiest for you.
Fill this in and your mail client opens with everything already written. Nothing is stored on this site.