Case Studies 12

Circuit Digest Cloud: An IoT Platform From MQTT Ping to WhatsApp Alert

A free IoT cloud for makers and embedded developers: device provisioning, MQTT telemetry, live dashboards, GPS geofencing, alerts over email, SMS and WhatsApp, and computer-vision APIs. Built and run at Semicon Media.

Dec 2025 – Present · FastAPI · PostgreSQL (Supabase) · MQTT

Bude Suite: Four Offline-First Apps on Standard ERPNext

Inventory, HR, Sales and Helpdesk apps in Flutter, one Frappe API layer behind them, and a rule that every write lands on a standard ERPNext record. Operations queue on the phone and sync when the signal returns.

Oct 2025 – Present · Flutter · Dart · Riverpod

BUDE MADE: A Two-Sided Maker Marketplace on One Frappe App

Buy what a local maker already made, or post a request and compare private quotes. Both paths end in one auditable order engine, with the concurrency races proven against a real database. Pre-launch.

Dec 2025 – Present · Frappe 16 · Python · MariaDB

One Dell T40: Self-Hosting a Company Platform Behind a Tunnel

The BUDE Global website, the ERP, the marketplace demo and four app demos run on one tower server, reached through a Cloudflare Tunnel with no open inbound ports. What that took, and what is still missing.

2025 – Present · Ubuntu · Cloudflare Tunnel · Nginx

PSGR KCW: An RFID Gate Pilot, 1,800+ Endpoints and a Journal

Three systems from a year at PSGR Krishnammal College for Women: an RFID gate pass piloted with three reader vendors for 10,000 students a day, GLPI inventory across 20+ labs and every institute system, and an OJS journal that put 1,000+ archived papers online.

Oct 2024 – Nov 2025 · C# · UHF RFID · SQL Server

Jewellery RFID Suite: A Business Built on a Reader Vendor's Tool

A Windows app for counting, tagging and moving jewellery with UHF RFID. I kept the reader vendor's 61-file tool and built the business around it: branch sign-in, licensing, anti-theft, audits, and transfers checked tag by tag.

Oct 2024 – Jan 2025 · C# · WPF · .NET Framework 4.7.2

Library Fine Kiosk: Scan Your Card, Pay by QR

A self-service kiosk for overdue library fines. Scan an ID card, see the amount, scan a Razorpay QR code made for exactly that fine, and the kiosk confirms the payment on its own. Built at 2CQR and written up as my MCA mini project.

Aug 2023 – Dec 2023 · C# · WinForms · Razorpay QR Codes API

Neuro-Chain: 715 Inventions on a Canvas You Can Steer by Hand

An explorable map of how inventions depend on each other, from fire to AGI. It started as one HTML file and became a React canvas app with hand-gesture control in a Web Worker and eight outside contributors.

Jan 2026 – Jun 2026 · React 19 · Canvas 2D · MediaPipe Hands

BUDE License Manager: Device-Locked Licences for Android Apps

Licensing for BUDE's proprietary apps: subscription licences bound to devices, signed API calls that can't be replayed, offline tokens, and staff-approved device resets. I wrote the spec, a freelancer built the base app, and I hardened it for Android.

Nov 2025 – Jul 2026 · Frappe · Python · HMAC-SHA256

Tech Presentations: Slide Decks as Validated Data

A presentations site where every deck is a JSON file checked against a schema before it ships. It started as a Reveal.js page and became a Next.js static site that exports any deck to PowerPoint, PDF or Word, deployed by CI to Cloudflare.

Nov 2025 – Present · Next.js 15 · React 19 · Zod

Daily Tech News Buddy: A News Reader That Survives Flaky Feeds

One page for the day's tech news, with AI summaries. Every feed has three ways in, the cache is shared by every visitor, and the Gemini key never leaves the server.

Apr 2026 – Jul 2026 · React 19 · TypeScript · Vite

SRMV College ERP: The Library Module

A modular PHP and MySQL ERP for a college, one folder per department. My part was the library: masters for books, locations, publishers and vendors, issue and return, and server-side tables that stay fast as the catalogue grows.

Jan 2023 – Apr 2023 · PHP · MySQL · Bootstrap