Reliable backends,
built to last.
Hi, I'm Sagar. I design and ship scalable backend systems and full-stack web apps with Node.js, NestJS, PostgreSQL and AWS. I care about clean architecture, clear APIs, and software that holds up under real load.
~/sagar.pngFull-stack & backend-heavy projects
A selection of products where I've designed APIs, data models, and infrastructure, and often built or integrated React / Next.js frontends across domains like sports, healthcare, IoT, and logistics.
An online consultation platform. I built the backend for bookings, live chat and sessions, wired up Cashfree payments, and wrote the customer↔provider matching algorithm that keeps the marketplace balanced.
Designed the coupon-generation logic and rarity management for a football club game, then optimized the PostgreSQL queries with Prisma so it stayed fast as the player base grew.
Posts, comments, media uploads and live messaging over WebSockets. The features that turn a feed into a community and keep people coming back.
Real-time disaster alerts and tracking built on a serverless AWS stack: Lambda, ECR, S3 and API Gateway: integrated with SaaS APIs and a CRM so responders always have a live picture.
Real-time chat and live location sharing over WebSockets, with Kafka event streams and Redis caching to keep order tracking snappy under load.
Contributed to the club and admin panels and the backend communication flows that keep operations moving smoothly across the platform.
Built and integrated an NGO website end-to-end, reliable APIs, clean data flow, and a responsive experience that helps a good cause reach more people.
A scalable CRM for managing doctors, patients and diseases, built with NestJS and TypeORM on PostgreSQL, documented with Swagger so the team could move fast.
Product listings, taxes, contracts, inquiries and real-time performance analytics for an agri trade platform. The connective tissue of a B2B marketplace.
Processed and visualized large IoT datasets with real-time analytics on Redis and PostgreSQL, containerized with Docker for reliable deploys.
An Android app for managing patient health records, with APIs that sync data cleanly between the device and the backend.
A dairy delivery platform built for the Smart India Hackathon, with secure Google Pay payments wired into a Node.js backend.
The toolkit
Backend-first, but comfortable across the stack, from API design and data modeling to deploy pipelines and the occasional React frontend.
Languages
05Backend & APIs
06Frontend
06Data
06Infra & DevOps
06Quality
06A bit about me
I'm a backend-leaning full-stack engineer who likes the quiet, unglamorous parts of software. the schemas, the queues, the things that have to not break at 3am.
Over 3+ years I've designed and shipped scalable backend systems and full-stack apps, mostly with Node.js, NestJS, PostgreSQL, MongoDB and Redis on the backend and React/Next.js on the front. I lean on clean architecture so systems stay maintainable long after launch, and I care about the details, clear APIs, sensible data flow, and tests that let the next person move fast.
The journey
How I got here, the roles that shaped how I build, and the schooling underneath it.
Building and scaling backend systems and full-stack products as part of the core engineering team.
Delivered end-to-end backend and full-stack solutions for clients across multiple domains: APIs, data pipelines, and cloud infrastructure.
Designed and shipped web applications with a focus on backend development, database design and keeping systems reliable as they scale.
Hands-on product engineering across the stack, contributing to features used by real classrooms.
First taste of professional backend work, building APIs and learning how production systems hold together.
Let's build something that lasts.
Got a backend that needs to scale, an API to design, or a product to ship? I'm open to roles and freelance work, let's talk.