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Open to new opportunities

Rohit Kumar, Full Stack Developer

Hi, I am a Full-Stack Developer from India with 3+ years of experience building production-grade applications, architecting robust backend systems, and integrating AI agents into real-world platforms.

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01About

Hi, I’m Rohit

Full Stack Developer (SDE-2) with 3+ years of experience building and scaling production-grade web applications using React.js, Node.js, Next.js, SQL, and Azure services. Experienced in designing and delivering scalable SaaS, real-time, and AI-enabled systems with Azure, WebSockets, Docker, and CI/CD. Strong in system design, backend architecture, API development, performance optimization, cloud deployment, and end-to-end product ownership.

Owned end-to-end delivery of multiple products from idea to production: sole developer on some, core full-stack contributor on others.

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DEVELOPER IDRK
Portrait of Rohit Kumar

Rohit Kumar

Senior Full Stack Developer

Level
SDE-2
Exp.
3+ yrs
Focus
Scalable products
WHAT I AMRK

What I am

  • 01Senior Full Stack Developer (SDE-2) at STATXO
  • 02Expertise: backend architecture, system design, scalable SaaS
  • 03Stack: React, Next.js, Node.js, SQL & NoSQL, Azure
  • 04Real-time & AI systems: WebSockets, agentic AI, RAG
  • 0530+ technical articles · 500K+ views
If found, say hello at rohit5swd@gmail.com

Quick facts

Based in
India
Education
B.Tech CSE · 8.5 CGPA
Currently
SDE-2 at STATXO
Status
Open to new opportunities
From idea to production: schema, APIs, frontend and deployment, owned end to end.

02Skills

The periodic tableof my stack

The areas I work across, and the tools I use to take products from idea to production.

03Personal projects

Things I’ve built

A selection of projects where ideas meet code, challenges become solutions, and technology creates impact.

  • 01 Android app

    Delhi Metro Live

    An Android route planner for the Delhi Metro network with shortest-path and minimum-interchange routing, backed by a Node.js + Express API on PostgreSQL (Supabase) for real-time fare calculation and multi-line interchange detection.

    • Shortest path via Dijkstra
    • Minimum interchange via BFS
    • 286 stations · 12 lines
    • Real-time fare calculation
    • Multi-line interchange detection
    • Optimised REST APIs
    • Node.js
    • Express.js
    • PostgreSQL
    • Supabase
    • Dijkstra / BFS
    Private repository

  • 02 Audio content platform

    Socializing On Vocals

    A short-form, audio-centric content platform built with MERN + Flutter, serving 1,200+ users with personalised feeds, secure auth and a gesture-driven UI.

    • 1,200+ users
    • Personalised feeds
    • Secure JWT auth
    • Gesture-driven UI
    • API performance +35%
    • Abuse cut by 90%
    • Flutter
    • React.js
    • Node.js
    • Express.js
    • MongoDB
    • JWT
    View on GitHub

  • 03 E-learning platform

    Gurukul.com

    A MERN e-learning platform with video courses, notes and research papers on an MVC backend, with scalable Node.js + Express REST APIs managing 500+ courses and 5,000+ learning materials.

    • 1,000+ users
    • 500+ courses
    • 5,000+ learning materials
    • Video courses, notes & papers
    • MVC architecture
    • ~40% less video buffering
    • React.js
    • Node.js
    • Express.js
    • MongoDB
    • REST APIs
    • JWT
    View on GitHub Live site

  • 04 E-commerce

    TechMart

    A premium e-commerce web app for computer hardware, gaming accessories and IT essentials, built on the MERN stack.

    • Computer hardware
    • Gaming accessories
    • IT essentials
    • MERN stack
    • MongoDB
    • Express
    • React
    • Node.js
    View on GitHub

  • 05 Mobile app

    Anonymask

    A Flutter app for anonymous, interactive conversations, powered by OpenAI’s API.

    • Anonymous conversations
    • Interactive chat
    • Powered by the OpenAI API
    • Cross-platform Flutter
    • Flutter
    • OpenAI API
    View on GitHub

  • 06 Web app

    Letsnote

    A note-taking web app powered by FastAPI, with task management built in.

    • Note taking
    • Built-in task management
    • FastAPI backend
    • Written in Python
    • FastAPI
    • Python
    View on GitHub
There's more on my GitHub. Show all on GitHub

04Experience & education

One continuous path

From a Computer Science degree, through freelance work, to a Senior Full Stack Developer.

  1. 2018–2022

    Education

    Bachelor of Technology, Computer Science & Engineering

    Dr. A.P.J. Abdul Kalam Technical University · Uttar Pradesh, India

    July 2018 – June 2022
    • 8.5CGPA
    • 400+problems solved
    • 500K+article views
    • Solved 400+ problems across LeetCode, HackerRank and Codeforces, strong on graphs and dynamic programming.
    • Wrote 30+ technical articles with 500K+ views on GFG, Medium and LinkedIn.
    • C++
    • C
    • Python
    • JavaScript
  2. 2022–2024

    Freelance

    Freelance Full Stack Developer

    Remote, India

    Aug 2022 – June 2024
    • 1,000+ed-tech users
    • 500+monthly orders
    • Delivered full-stack MERN solutions for clients including an ed-tech platform serving 1,000+ users and e-commerce platforms handling 500+ monthly orders.
    • Built dashboards, course-selling platforms, business websites, portfolios and blogs, owning the full lifecycle from architecture to deployment.
    • MongoDB
    • Express
    • React
    • Node.js
  3. 2024–Present

    Full-time

    SDE-2, Senior Full Stack Developer

    STATXO

    July 2024 – Present
    • 1,000+concurrent chat users
    • <200msreal-time latency
    • 40%+faster APIs
    • Owned end-to-end delivery of multiple products from idea to production on React.js, Node.js (Express), and MongoDB/PostgreSQL, covering schema design, REST APIs, frontend and deployment.
    • Built and shipped an agentic AI SaaS platform end-to-end, owning frontend, backend, database architecture and Azure cloud deployment.
    • Developed a WebSocket-driven agentic AI chatbot with <200ms latency supporting 1,000+ concurrent users, with multi-turn history, smart recommendations, query cancellation and session controls.
    • Contributed to a RAG-based chatbot for an enterprise commodity intelligence platform, designing agent orchestration logic across multiple internal data sources.
    • Built real-time dashboards tracking 120+ data points for an enterprise procurement platform, backed by optimised data pipelines.
    • Integrated Azure App Services, Blob Storage, Static Web Apps and AD SSO for zero-downtime deployments, owning CI/CD via GitHub Actions and Azure Pipelines.
    • Reduced API response times by 40%+ through query tuning and indexing across MongoDB and PostgreSQL; rebuilt a legacy frontend with MVC, code splitting and lazy loading.
    • React
    • Node.js
    • Express
    • MongoDB
    • PostgreSQL
    • Microsoft Azure
    • Azure DevOps
    • GitHub Actions
  4. 2026

    Milestone

    Promoted SDE-1 → SDE-2

    STATXO

    April 2026
    • For technical expertise, strong problem-solving, and leading the team through complex architectural decisions.

05Achievements

Milestones so far

  1. 01 / 06

    Problems solved

    Across LeetCode, HackerRank & Codeforces

    Graphs, dynamic programming and system-level problems

    Profile

    400+

  2. 02 / 06

    Technical articles

    On GFG, Medium & LinkedIn

    Full-stack, DSA and system design

    30+

  3. 03 / 06

    Article views

    Across those 30+ articles

    Read on GFG, Medium & LinkedIn

    500K+

  4. 04 / 06

    Promoted

    SDE-1 → SDE-2 at STATXO · April 2026

    Technical expertise, problem-solving & architecture leadership

    SDE-2

  5. 05 / 06

    Google Arcade

    Coding challenges

    Earned swags and badges

    Arcade

  6. 06 / 06

    Hacktoberfests

    Open-source contributions

    Earned swags and badges

    OSS

06Contact

Let's build something together

Hiring, collaborating, or just want to talk tech? Drop me a message and it lands straight in my inbox.

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