I'm Sarthak Agrawal, an ai infrastructure engineer based in India. I work on the layer most people never see — the backend services, data pipelines and infrastructure that decide whether a product is fast, reliable and affordable to run.

I spent three years at Front.Page (YC S'21), where the backend had to grow up fast: I built a real-time market-data pipeline on Go and Kafka that helped carry daily actives from 15k to 200k in 14 weeks. From there the work moved into AI infrastructure — vector-powered personalized feeds with BERT embeddings and Milvus, and a family of RAG agents that cut human support load by 90%.

Today I'm at VaultWealth (Peak XV-backed), building financial-planning services and the durable, Temporal-backed workflows underneath them — because in wealth management, a workflow that fails halfway is worse than one that never ran.

I care most about the unglamorous things: the timeout, the retry, the backpressure, the migration that has to run while the system stays up. Good infrastructure is mostly the failure modes you handled before anyone noticed.

Outside the day job I build constantly — developer tools, full-stack apps, a few games — and most of it is open source on my projects page.