Projects | Arjun Singh

Flagship

Projects I own end to end

Published marketplace apps and full-stack products, each built from schema design through production.

WishVault

Shopify App Store

Published Shopify App Store wishlist app

Delivers the wishlist drawer through a Theme App Extension so it installs on any merchant theme without code changes, with guest wishlists that persist saves without an account
Merchant analytics dashboard surfacing most-wishlisted products as buying-intent signal, plus automated reminder emails that bring shoppers back to saved items
Credit-metered subscription billing across three tiers (free, $5, $10, with annual plans) on the Shopify Billing API, gating customization and email features per plan

EnvCompare

VS Code Marketplace

Published VS Code Marketplace extension

Diffs keys across .env and every .env.* variant in a workspace, reporting exactly which keys each file is missing
Inline completion provider suggests missing keys as Tab-to-accept snippets, backed by debounced file watchers that warn the moment a workspace goes out of sync
Compares key names only and never transmits values, so secrets stay on the local filesystem

Notion CMS Blog

Notion-backed publishing platform

Posts are authored in Notion and go live the moment their status flips to Published, with the filter applied server-side in the Notion API query so drafts never reach the client
Statically generated listing and post pages with ISR revalidation, so published edits appear without a redeploy while pages keep serving from cache and requests stay inside Notion's API rate limits
Maps Notion's nested block tree and loosely typed database properties into typed React components to render rich text, headings, and embeds

Real-time collaborative Notion clone

Real-time collaborative document editing on Convex live queries, supporting 100+ concurrent editors with changes propagating to every client without a refresh
Nested document hierarchy with dynamic routing and Clerk-backed authentication, scoping each user's workspace tree so every document is individually addressable

PulseBar

Shopify App Store

Published Shopify App Store announcement bars

Sticky, scrolling, rotating, and marquee announcement bars with countdown timers, campaign scheduling, and page or device targeting
Brand customisation for fonts, colours, buttons, and animations; email capture syncs with Shopify Email, Brevo, and Klaviyo
Published to the Shopify App Store with Free, Pro ($10/mo), and Advanced ($17/mo) plans

GangaClean

Volunteer-management dApp

Three on-chain roles enforced through OpenZeppelin AccessControl, separating organizers, verifiers, and volunteers
Pull-payment reward flow so volunteers withdraw earned rewards themselves rather than relying on a push transfer