Arpan Roy Choudhury

I've built backend services for Mentalyc, Viact.ai, DappRadar, and Hakuna across AI documentation, enterprise monitoring, blockchain data, and live streaming. At DappRadar, I built high-throughput Node.js and PHP APIs and multi-chain indexing pipelines serving dApp, token, NFT, and DeFi data to more than one million users. At Hakuna, I delivered APIs for live video, chat, virtual currency, gifting, and content discovery for a platform with more than 10 million downloads. I'm currently building Node.js and TypeScript services for AI workflows, including transcription, LLM generation, RAG pipelines, cloud deployments, and production observability. I also build products such as Shindigs, a funded ticketing platform with payments and WhatsApp authentication, and ninjatest.app, a real-time exam-prep platform.