Backend systems, event pipelines, and the data layers underneath them.
Re-architected the entire send engine of a SendGrid-class email platform on Apache Kafka — per-provider rate limiting across 4 provider types, full delivery, and a zero-downtime production cutover.
Powered the backend of a quant-driven investing app across web, iOS, and Android — live Zerodha Kite portfolio sync, 2-channel real-time alerts, and TradingView charts streaming Angel One market data.
Architected and built from an empty repository: a distributed WhatsApp campaign engine with BullMQ-driven bulk sends, scheduling, and a webhook delivery system built for thousands of messages at once.
Backend behind an embeddable Instagram widget trusted by 1000+ users — Meta Graph API integration, multi-account feeds, and a cache layer that keeps embeds alive even when Instagram goes down.
Scaled a live UK home-energy platform that turns a detailed home profile — structure, materials, occupants, vehicles, appliances — into an AI-generated efficiency report, shipping new features, analytics, and reporting.
My first production system: a Strapi and GraphQL backend powering a coffee community across web and 2 mobile apps — guides, recipes, articles, and games from one API.
A full-stack music streaming platform built solo as my final-year project — search, shareable playlists, and a complete admin console managing 4 content domains.