Smeet Agrawal

I’m a Software Engineer who builds secure, production-grade backend and full-stack systems, with a strong focus on scalable REST APIs and reliable authentication flows. I’m currently working across multiple production client products, translating real requirements into maintainable services.

At Big Circle, I built and maintained REST APIs using FastAPI (Python) and Next.js (TypeScript), backed by PostgreSQL with async connection pooling and query optimization. I integrated a Banking-as-a-Service provider for IBAN payouts with OAuth + mTLS authentication, idempotent webhook handling using HMAC signature verification, and AES-256 encryption for sensitive payment data.

I also design user-facing experiences for long-running processes by using BullMQ/Redis background workers with real-time progress streamed via Server-Sent Events (SSE). My projects and open-source work reflect my interest in AI-driven search and document intelligence—building a RAG-based document Q&A platform with pgvector hybrid search, Docling ingestion, and report fact-checking—plus contributions to nginx, Docling, and Maxun.