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Hello, I'm

Sumit RanaFull Stack Engineer

I design, build, and ship complete products — scalable cloud architecture, AI-powered platforms, and interfaces people actually enjoy using.

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about

Engineering with intent

A quick look at who I am, what I value, and the numbers behind the work.

I'm a Senior Full Stack Engineer with 8+ years of experience taking products from idea to production — system design, data modeling, APIs, frontends, cloud infrastructure, and the CI/CD pipelines that ship it all. Recruiters shouldn't have to guess: I own products end to end.

At Deliverable Service I lead a team of 15+ engineers building enterprise applications and large-scale eCommerce platforms — architectures spanning PostgreSQL, MongoDB, and Redis; APIs in NestJS, Express, and Laravel; frontends in React, Next.js, and React Native; all deployed and operated on AWS and DigitalOcean.

My current focus is AI engineering: LLM-powered document intelligence, RAG pipelines, vector search, and AI agents that turn unstructured data into structured decisions. Not demos — production systems with monitoring, cost controls, and measurable accuracy.

Linux servers since 2017
PostgreSQL by default
Ships behind CI, even on Fridays
Prompts are code — versioned & tested
Portrait of Sumit Rana
Hamirpuravailable

8+

Years of experience

15+

Engineers led

25+

Products shipped

7+

Years running cloud in production

Architecture before code

Schemas, boundaries, and failure modes get designed first. Rewrites are expensive; thinking is cheap.

Performance is a feature

Query plans, cache strategy, and p95s are part of the definition of done — not an optimization phase.

Teams ship, not heroes

Leading 15+ developers taught me that review culture, clear interfaces, and mentoring outdeliver any individual.

End-to-end ownership

Idea → architecture → code → deployment → operations. I stay accountable for what happens after the merge.

skills

Tools I think in

The technologies I reach for daily — and how long we've been acquainted.

  • TypeScript

    6 years

  • React

    8 years

  • Next.js

    5 years

  • React Native

    4 years

  • JavaScript

    8 years

  • Tailwind CSS

    4 years

  • Node.js

    8 years

  • NestJS

    4 years

  • Express.js

    7 years

  • Laravel

    3 years

  • PHP

    4 years

  • PostgreSQL

    6 years

  • MongoDB

    6 years

  • MySQL

    6 years

  • Redis

    5 years

  • Prisma

    3 years

  • AWS

    6 years

  • DigitalOcean

    5 years

  • Docker

    5 years

  • Nginx

    6 years

  • Linux

    7 years

  • GitHub Actions

    4 years

  • LLMs & OpenAI

    2 years

  • RAG Pipelines

    2 years

  • Vector Databases

    2 years

  • AI Agents

    1 year

  • Prompt Engineering

    2 years

  • Document Intelligence

    1 year

experience

Where I've shipped

A timeline of the teams and products I've helped build.

  1. Jun 2021 — Present

    Senior Full Stack Engineer · Deliverable Service

    Leading engineering for enterprise applications and large-scale eCommerce platforms — owning architecture, delivery, and a team of 15+ developers.

    • Led development of multiple enterprise applications while managing a team of 15+ developers
    • Designed scalable service architectures and database schemas across PostgreSQL, MongoDB, and MySQL
    • Built large eCommerce platforms with APIs in Express.js, NestJS, and Laravel
    • Shipped web and mobile frontends in React, Next.js, and React Native
    • Deployed and operated workloads on AWS and DigitalOcean behind Nginx/Apache on Linux
    • Node.js
    • TypeScript
    • NestJS
    • Express
    • React
    • Next.js
    • React Native
    • PostgreSQL
    • MongoDB
    • Redis
    • Docker
    • AWS
    • DigitalOcean

  2. Nov 2018 — May 2021

    Node.js Developer · Isitwa Technologies

    Backend engineer for real-time social products — chat systems, WebSocket infrastructure, and a job search platform.

    • Built backend services and REST APIs for social networking applications
    • Developed real-time chat on custom WebSocket infrastructure
    • Shipped and operated a job search platform end to end
    • Deployed to AWS and DigitalOcean; administered Linux servers in production
    • Node.js
    • Express
    • WebSockets
    • MongoDB
    • AWS
    • DigitalOcean
    • Linux

  3. Nov 2017 — Oct 2018

    Junior Web Developer · WebCodeFt Technologies

    First engineering role — full-stack development on internal products, and the production fundamentals that stuck.

    • Built frontend and backend features for internal products
    • Learned production discipline: version control, deployments, and debugging live systems
    • JavaScript
    • PHP
    • MySQL
Currently WorkingLatest ongoing project

Internal CLA Project

An AI-powered data extraction and analytics platform built on Large Language Models — turning unstructured documents into structured, queryable knowledge.

Document Intelligence
Data Extraction
Structured Information Generation
LLM Prompt Engineering
AI Agents
Workflow Automation
Data Analytics
Knowledge Retrieval
RAG Pipelines
Vector Databases
AI-assisted Insights
Intelligent Report Generation

projects

Selected work

Projects where the engineering mattered as much as the outcome — each one links to a full case study.

High-Performance eCommerce Platform

Scalable storefront and checkout built to survive peak sale-day traffic

A production eCommerce platform where the previous storefront degraded under promotional traffic spikes, and slow page loads were bleeding checkout conversion. Rebuilt the rendering and data layer so performance held under load instead of failing at the exact moment revenue was highest.

Peak concurrent sessions
10k+
Page load (p75)
<1.2s
Uptime on sale days
100%
  • Next.js
  • NestJS
  • PostgreSQL
  • Redis
  • AWS
  • DigitalOcean

AI Product Recommendation Engine

Personalized recommendations without a personalization latency tax

Static best-seller lists on product pages were leaving conversion on the table. Built a recommendation service that personalizes results per shopper while keeping response times indistinguishable from a static list.

P95 response time
<80ms
Cold-start coverage
100%
Recompute cadence
Nightly + real-time
  • Node.js
  • Python
  • PostgreSQL
  • Redis
  • AWS

Job Search Engine

Candidate-to-employer matching with real-time messaging at scale

A job discovery and application platform matching candidates to postings and enabling direct, real-time conversations between employers and candidates — built and operated as a long-running production system, not a prototype.

Relevance scoring
Multi-signal
Messaging
Real-time, horizontally scaled
In production
2.5+ years
  • Node.js
  • MongoDB
  • WebSockets
  • AWS
  • DigitalOcean

Artist Management Platform

Bookings, royalties, and contracts in one system of record

Music labels and artist managers were tracking bookings, royalty splits, and contracts across spreadsheets and email — a setup that produced missed payments and double-booked dates. Built a multi-tenant platform to replace it.

Tenant isolation
Query-layer enforced
Royalty calc
Rules-engine driven
Roles supported
Admin / Agent / Artist
  • Next.js
  • NestJS
  • PostgreSQL
  • Redis
  • AWS

contact

Let's build something

Have a project in mind, a role to discuss, or just want to talk shop? My inbox is open.

sumitrana1996@gmail.com

Hamirpur, Himachal Pradesh, India · open to remote

Prefer email? No problem — the form and the address land in the same inbox. I usually reply within two working days.