Rahul
Chowdhury

Built NeoGPT because I was frustrated that every AI chatbot loses your entire conversation on refresh. Under the hood, each thread lives in MongoDB with its own URL route — share a link and resume exactly where you left off. Groq LLM handles inference at surprisingly low latency. Tavily kicks in automatically when the model decides it needs fresh data from the web. I layered a Redis cache in front of MongoDB so resuming hot threads takes under 50ms. The frontend syncs thread state via URL routing, which means the browser back button actually works the way you'd expect.

Linkite started as a weekend experiment and turned into the project I'm most proud of. Short IDs use a custom base-62 encoder (collision probability stays negligible past 10k links). Every submitted URL goes through three security stages: HTTPS validation, Google Safe Browsing API lookup, and a live GET request to catch sketchy redirects. The analytics pipeline tracks clicks, devices, countries, and referrers in real time. Premium users get elevated API rate limits — Razorpay webhooks update those limits in Redis the instant a payment goes through. I also shipped a browser extension in plain HTML/CSS/JS that shortens whatever tab you're on with a single click.

My first real React project beyond tutorials. Used Redux for global state (overkill for a portfolio, but great practice), React Router for page transitions, and EmailJS so the contact form works without spinning up a server. Learned a lot about CSS animations, responsive grids, and Netlify deployments here — it's the project that made me realise I actually enjoyed frontend work.