DB

Available for ambitious projects

I build scalable backend systems, modern web applications, and AI-powered products.

I'm Diptanshu Banerjee, a Full-Stack Engineer specializing in backend systems, cloud infrastructure, and applied AI. I build production-ready software from design to deployment.

Full-Stack Engineer
Dehradun, India

Explore selected work ↘Download résumé
Diptanshu Banerjee — portrait
Portrait / 01

Diptanshu Banerjee

Current focus

Production AI systems

02 / Philosophy

Own the full lifecycle — not just the UI.

Workspace / candid photoPlaceholder 02

I'm a full-stack engineer with a strong interest in backend systems, cloud infrastructure, and applied AI. I enjoy building production-ready software—from designing APIs and databases to deploying scalable applications and developing AI-powered products.

My experience includes building modern web applications, architecting backend services, fine-tuning LLMs with Hugging Face and PEFT (LoRA), integrating third-party platforms, and deploying applications on the cloud. I enjoy working across the entire stack and building systems that are reliable, maintainable, and thoughtfully engineered.

20+

Production Features Shipped

5+

Client Projects Delivered

Top 5

Hackathon Finalist Out of 180+ teams

01 / Selected work

Ideas turned into working systems.

A selection of full-stack products shaped from architecture and APIs through deployment and operations.

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    01Flagship

    MomGovAssistance

    A multi-portal government assistance platform for U.S. mothers — AI-powered eligibility, case management, referrals, documents, and analytics — serving 400+ government assistance programs in production.

    Mother and Partner portals share a high-performance rule engine and AI eligibility scanner (Claude) that filters hundreds of programs before inference, reducing end-to-end scan time from 30+ seconds to under 2 seconds. Built the Partner Portal from scratch, modernized the existing Mother Portal, and implemented production features including organization management, RBAC, referrals, case tracking, document workflows, and analytics. Production deployments on AWS with PostgreSQL, Prisma, CI/CD, SSL, and DNS ensure reliable operation for real U.S. organizations and mothers.

    • ↗Built the Partner Portal from scratch & modernized the Mother Portal
    • ↗Optimized AI eligibility scans from 30+ sec → <2 sec
    • ↗Production infrastructure: AWS, PostgreSQL, CI/CD, SSL, DNS
    • React
    • Node.js
    • Express
    • PostgreSQL
    • Prisma
    • Supabase
    • Claude
    • AWS
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    02Live

    Socially

    A social platform with profiles, posts, follows, and real-time messaging — built for speed and presence.

    Socially brings together feed interactions and Socket.IO messaging with a Next.js frontend and PostgreSQL/Prisma data layer. Messaging aims for sub-200ms latency, with deployment spanning Vercel and GCP so the product stays snappy as conversations grow.

    • ↗Live at socially.org.in
    • ↗Realtime messaging under 200ms latency target
    • ↗Full social graph: posts, likes, comments, follows
    • Next.js
    • PostgreSQL
    • Prisma
    • Socket.IO
    • Vercel
    • GCP
    Visit live project ↗
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    032025

    Chat with Video Calling

    Group and private chat with WebRTC video — signaling, rooms, and a REST surface built from scratch.

    A realtime communication stack combining Socket.IO signaling with WebRTC media, plus 8+ REST endpoints for rooms and auth. Node, React, and MongoDB power private and group conversations with video sessions that feel immediate.

    • ↗WebRTC + Socket.IO signaling pipeline
    • ↗8+ REST endpoints for chat and rooms
    • ↗Private and group sessions in one product
    • Node.js
    • React
    • MongoDB
    • WebRTC
    • Socket.IO

03 / Experience

Roles where ownership met measurable impact.

  1. 01

    Apr 2025 – Oct 2025

    Remote

    Full-stack Developer Intern

    Classy Endeavors

    Shipped production features across Next.js, React, and Express — including Gemini AI and Gmail API workflows that cut manual effort by roughly 40%. Worked with GCP, AWS S3, and Lambda while delivering 3+ features that landed in production.

  2. 02

    2025

    Remote

    Backend Developer

    Pet-So-Much

    Built the backend from scratch: 10+ API resource types, Stripe payments with webhooks, pagination that reduced payloads by about 70%, and granular RBAC for admin flows across products, orders, and prescriptions.

  3. 03

    Oct – Nov 2024

    Dehradun

    Frontend Developer Intern

    Indian Hempstore

    Revamped 5+ core components and contributed to a Next.js admin dashboard — tightening UX and maintainability for day-to-day operations.

  4. 04

    Ongoing

    Remote

    Freelance & Upwork

    Independent

    Full ownership from idea to deploy: fullstack apps, APIs, AI integrations, cloud, auth, payments, database design, and performance work for clients who need production-ready delivery.

04 / Leadership & achievements

Building people and products under pressure.

Jun 2025 – Present

Technical Head — UPES CSI

Lead technical initiatives for the chapter: mentor 10+ members, review projects, run workshops, and help shape events including YUGMAK — turning ideas into shipped student work.

Competition highlight

Hackathon 4.0 Finalist

Top 5 of 180+ teams (Feb 2025). Built a Smart Digital Coaching Platform in 24 hours — React, TypeScript, Node, MongoDB, Socket.IO, JWT, with realtime chat and video.

05 / Technical craft

Tools are temporary. Good systems endure.

01 / Languages

  • TypeScript
  • JavaScript
  • C++
  • Python
  • Rust

02 / Frontend

  • React
  • Next.js
  • Tailwind CSS

03 / Backend & Data

  • Node.js
  • Express
  • PostgreSQL
  • MongoDB
  • Prisma
  • REST
  • WebSockets

04 / Cloud & DevOps

  • AWS
  • GCP
  • Vercel
  • PM2
  • GitHub Actions
  • Linux
  • Nginx
  • SSL
  • CI/CD

05 / Integrations

  • Socket.IO
  • WebRTC
  • JWT
  • Stripe
  • Razorpay
  • Gmail API
  • Gemini / Claude / OpenAI
  • RBAC

06 / Right now

Building, freelancing, and sharpening for the next role.

  • 01Preparing for software engineering interviews — system design, backend depth, and competitive programming.
  • 02Freelancing fullstack, AI, and cloud projects with production ownership.
  • 03Practicing DSA on LeetCode and Striver A–Z alongside online assessments — fundamentals that keep architecture honest.

07 / Contact

Let’s build something that ships.

Open to software engineering roles, backend/fullstack work, AI products, and freelance collaborations. Prefer the form — or reach out directly.

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