Software Engineer · Full-Stack & Backend
Sunanda Samanta
I build backends that scale and products that ship.
Software engineer with ~4 years building web applications and backend services end-to-end — from database design to deployment, on-call, and monitoring. I've shipped real-time systems, a production AI agent, and DevUtils, a developer-tools product I grew solo to 5,000+ monthly users.
01. What I do
I'm a backend-leaning full-stack engineer — most at home designing the systems behind an app, but happy building the interface too. In plain terms: I make software that stays fast and reliable as more people use it. Here's where I spend my time.
Backend & Infrastructure
The engine room. I design the databases, APIs, and services that keep an app fast and reliable as traffic grows — and own them end-to-end, including deployment and on-call.
AI Engineering
I connect language models to a company's real data so they give accurate, useful answers instead of making things up — and can take action, not just chat. (This is RAG + tool-calling agents.)
Cloud & DevOps
I ship and run software in the cloud with automated, repeatable releases — containers, infrastructure-as-code, and monitoring — so deployments are safe and problems surface early.
Full-Stack Product
I also build the part users actually see — responsive web and mobile interfaces that load quickly and are easy to use, wired up to the backend I built.
02. Tech stack
The tools I reach for. Comfortable across the whole stack, strongest on the backend and infrastructure side.
Languages
Frontend
Backend
Databases
Cloud & DevOps
AI
03. Experience
Software Engineer
Jul 2024 – May 2026- Built the backend platform from an empty repo and made the early architecture calls — a microservices split — that the cross-platform apps shipped on. Owned it end-to-end, including deployment, CI/CD, and on-call.
- Built a real-time messaging system on an event-driven (Pub/Sub) backend that held 1,000+ concurrent sessions at sub-50ms latency in load testing.
- Deployed and ran services on Kubernetes with Helm and Terraform, containerized with Docker, and automated releases through GitHub Actions.
- Designed database schemas and indexes and reworked the slowest queries, cutting average API response time by ~40%.
- Built async data-sync pipelines with retry, failure handling, and replay, plus monitoring and alerting for production visibility.
Full-Stack Developer
Sep 2021 – Jul 2024- Built full-stack MERN features end-to-end for a SaaS product with ~10,000 users — React front ends, Express/Node REST APIs over MongoDB, authentication, third-party integrations, and monitoring.
- Shipped a production AI agent — an LLM with retrieval (RAG over vector search) and tool calls that let users act on internal data in plain language, cutting routine manual lookups roughly in half.
- Wrote Python and Node.js for production APIs and data integration; reworked batch and background processing for heavier workloads.
- Improved front-end performance, cutting page load times by ~25%.
04. Projects
Things I've built outside of work — a shipped product plus a few engineering experiments I took on to go deep on a problem. The featured one has real users; the rest are open-source or personal R&D.
DevUtils
An open-source, privacy-first suite of developer tools that I built and grew solo to 5,000+ monthly active users. Everything runs in your browser — it processes multi-gigabyte files entirely client-side using Service Worker chunking, so your data never leaves your machine and nothing ever touches a server.
MEV / Arbitrage Bot
A low-latency on-chain trading bot in Rust, using mempool monitoring and flash loans with sub-second execution. I built it to understand on-chain systems end-to-end — the kind of latency and concurrency problem you can't fully appreciate until you've shipped one.
Infinite-GIF
An open-source engine for optimized, continuous GIF rendering — it uses a long-lived HTTP response to stream live data (prices, server stats) into otherwise-static places like README files and emails, drawn on the fly with Canvas.
05. Education
B.Tech — Computer Science & Engineering
06. What's next
Let's build something.
I'm open to backend, full-stack, and AI engineering roles — based in Gurugram and open to relocation or Bengaluru. If you need someone who can own a system from design through production, I'd love to talk.