Building things at Zimble SystemsKerala, India

Hey, I'm Alvin Joy.

Full-stack Developercrafting interactive experiences, end to end.

I'm Alvin Joy, a full-stack developer from Kerala who loves building interactive applications. I started with Discord bots in discord.js, and these days I build with Flutter and Go at Zimble Systems, with side quests into the web and machine learning. I'm always eager to learn, and I care a lot about open source.

More about meGitHub

Selected work

Stuff I've built

Projects I'm proud of: retrieval-augmented generation, computer vision for Indian roads, realtime apps and tools I actually use.

PointerRAG

Chat with your documents. A full RAG pipeline with vector search, CrossEncoder reranking and a local pointer-generator model for grounded, low-latency answers.

Next.js
FastAPI
ChromaDB
PostgreSQL

Signalyze

Traffic sign recognition built for Indian roads. A YOLOv8 model detects and classifies 37 sign categories in real time and gives drivers audio feedback.

YOLOv8
Next.js
FastAPI
Prisma

Hive

A social networking platform with profiles, threads ("buzzes"), communities, multi-level comments and search.

Next.js
TypeScript
MongoDB

Socket Chat

Temporary, disposable chatrooms with realtime messaging. No accounts, no history, just a link.

Next.js
Socket.io
Express

Todo

A todo app with advanced controls: auth, filters and realtime sync, wrapped in a clean shadcn/ui interface.

Next.js
Supabase
shadcn/ui

Links

Linktree, but better. My personal link-in-bio page with springy motion and a tiny footprint.

Next.js
Motion
Tailwind CSS

Toolbox

What I work with

TypeScriptJavaScriptReactNext.jsNode.jsTailwind CSSHTMLCSSFlutterGoDartPythonCTypeScriptJavaScriptReactNext.jsNode.jsTailwind CSSHTMLCSSFlutterGoDartPythonC
JavaFastAPIPrismaSocket.ioSupabasePostgreSQLMySQLMongoDBGitGitHubGitHub ActionsVercelMarkdownJavaFastAPIPrismaSocket.ioSupabasePostgreSQLMySQLMongoDBGitGitHubGitHub ActionsVercelMarkdown

Have an idea? Let's build it together.

I'm open to collaborations, interesting problems and good conversations.

Say hello