Arnab Saha

I’m a backend engineer with 3 years of experience building and operating production systems at an early-stage startup. My work spans API development, PostgreSQL-backed systems, cloud infrastructure, payments, data pipelines, observability, and production support.

I take end-to-end ownership—from design to rollout and live operations—partnering directly with the CEO on scoping, prioritization, delivery, and production operations. At Bhumio, I helped take the platform from early build-out to supporting its first paying customer while adapting to changing requirements.

I build core workflows for real estate transactions and payments, including digital signatures, authentication, analytics, and email delivery using NestJS, PostgreSQL, Stripe, ZohoSign, AWS Cognito, QuickSight, SES, and ReactEmail. I also designed and built a canonical property data platform in Go, PostgreSQL, and PostGIS, linking 5M+ tax records and ~1M sales records into a 6.5M-property dataset with deterministic matching, incremental ingestion, and query-optimized lookup tables.

I reduced infrastructure costs by ~87% by migrating from microservices to a monolith and optimizing AWS/Cloudflare usage across RDS, EC2, S3, Route53, and WorkSpaces. I strengthen reliability and incident response with Sentry, Grafana, Loki, Prometheus, and Promtail, and I mentor newer engineers through documentation, implementation guidance, and code reviews.