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Rajendra Kumar
Portrait of Rajendra Kumar

Rajendra Kumar · Senior Front End Developer

I build fast, polished web and mobile apps for startups and businesses.

Senior Front End Developer with 5 years of experience building React.js web apps, React Native mobile apps (iOS & Android) and Node.js/Express.js backends. Available for freelance projects and full-time opportunities.

Start a project View resume
Gurugram, IndiaOpen to freelance work and full-time roles. Available to join within 15 days

  • 5 years of experience

    Frontend development across web, mobile and backend technologies.

  • Team lead

    Led a team of 5 developers across web, mobile and backend projects.

  • Up to 30% faster

    Improved application performance through frontend and backend optimization.

  • 75% faster deployments

    Reduced deployment time through CI/CD automation across AWS, GCP and Azure.

  • 10,000+ monthly users

    Delivered frontend applications used by more than 10,000 monthly active users.

  • Live on both stores

    Published and maintained production apps on the Apple App Store and Google Play Store.

Selected work

Live products I have built

Real screenshots, what I was responsible for, the hardest problem, and the result.

All projects
Dealer app home screen with RTO Services, Service History, Challan Check and Vehicle Details, and a list of the dealer's requests
Vehicle Check screen where a dealer enters a registration number to get Vahan vehicle details
01React NativeMobile app

MotorPedia Dealer App

B2B Car Dealer & Auction Platform

My role
Built the iOS and Android app with React Native and TypeScript.
Challenge solved
Auction state drift. Bid events carry sequence numbers so out-of-order messages can be detected, and the app reconciles with the server over REST if the connection drops for more than about three seconds. Bids are acknowledged by the server before they count.
Outcome
Used by 1,000+ dealers daily with 99% uptime. Redux reduced state-related bugs by 30%, Firebase integration reduced data latency by 50%, and Figma-designed workflows improved navigation efficiency by 20%.
  • React Native
  • TypeScript
  • Redux Toolkit
  • Socket.io
  • WebSockets
  • Axios
Read case study: MotorPedia Dealer AppApp Store for MotorPedia Dealer App (opens in a new tab)Google Play for MotorPedia Dealer App (opens in a new tab)
Used car search results with filter chips, a search box, price, fuel, transmission and owner details, a More Details button, and Filters and Sort controls
Browse by vehicle category: SUV, sedan, hatchback and MUV
02React NativeMobile app

MotorPedia Classifieds

Used Car Marketplace (Web, iOS & Android)

My role
Built the mobile apps (React Native, Expo) and the Next.js web frontend, and worked on the Node.js REST APIs.
Challenge solved
Heavy images. Vehicles can have 20+ HD photos, so the web serves WebP or AVIF with responsive sizes and blurhash placeholders to ease memory pressure.
Outcome
A live marketplace available as a web PWA and on both app stores, with shared code across channels, faster loading through bundle and query optimisation, and an end-to-end path from search to inspection, finance and paperwork.
  • React Native
  • Expo
  • Next.js
  • TypeScript
  • Redux Toolkit
  • PWA
Read case study: MotorPedia ClassifiedsApp Store for MotorPedia Classifieds (opens in a new tab)Google Play for MotorPedia Classifieds (opens in a new tab)
Home page with a Buy Car and Sell Car lead form, a car inspection banner, service shortcuts and MotorPedia Assured benefits
03Next.jsWeb app

The MotorPedia

Next.js Car Marketplace & RTO Services Portal

My role
Built the Next.js web frontend.
Challenge solved
Search pages at scale. Dynamic Next.js routes with incremental static regeneration create localised landing pages for each city and service without rendering everything on every request.
Outcome
A live Next.js portal that brings buying, selling, vehicle checks, RTO services, insurance and finance into one place, with search-friendly city pages and fast, up-to-date listings.
  • Next.js
  • React
  • TypeScript
  • Redux Toolkit
  • RTK Query
  • Axios
Read case study: The MotorPediaLive site for The MotorPedia (opens in a new tab)
Vendor dashboard with week, month and year views, bookings and amount collected, a daily bar chart and Home, Revenue, Booked and Account tabs
Sign-in screen with Service Provider and User Profile tabs, a language switch, email or phone and password fields, and Facebook and Google sign-in
04React NativeMobile app

Abeona

Hotel, Suite & Event Space Marketplace

My role
Led the mobile frontend architecture.
Challenge solved
Dense marker clusters. Map view-state was separated from list state so panning, zooming and marker selection stay smooth with many properties on screen.
Outcome
One codebase serves travellers and vendors in English and Arabic, with native-feeling RTL layouts for Middle Eastern markets, smooth animated charts and map interactions, and fewer redundant Places API calls.
  • React Native
  • TypeScript
  • Google Maps SDK
  • Google Places API
  • Reanimated
  • i18n
Read case study: Abeona

Freelance

How I can help your product

For startups and businesses that need a reliable web or mobile engineer, for a new build or an app that is already live.

All services

How we work together

  1. 1

    Discuss

    We agree on scope, priorities and the first milestone. For an existing app I start with a short code audit before changing anything.

  2. 2

    Build

    Iterative delivery with regular demos: typed, reusable components, tests on critical flows, and performance checked along the way.

  3. 3

    Launch

    Web deploy or App Store and Play Store release, monitoring, and handover documentation so your team can keep shipping.

Discuss your project See project results

Career

Professional experience

Full timeline

  1. Senior Frontend Developer (React.js, React Native)

    Motorpedia365 Revolution Pvt. Ltd. · Full-time

    Jul 2024 – Jul 2026 · 2 yrs 1 mo

    Provided frontend solutions: a React Native dealer app (iOS & Android), React.js web platforms (classifieds marketplace, admin dashboard) and supporting Node.js/Express.js REST APIs, serving 1,000+ active dealers with 99% uptime.

    Achievements

    • Reduced delivery time by 20% through agile sprint planning and structured code reviews
    • Cut deployment time by ~75% with automated, zero-downtime release cycles
    • React Native
    • React.js
    • Node.js
    • Express.js
    • Redux
    • Firebase
    • AWS
    • Vercel

  2. Front End Developer

    Pixoatic Solutions · Full-time

    Apr 2023 – Apr 2024 · 1 yr 1 mo

    Built a React.js e-commerce platform and a React Native inspection app side by side, shipping 2 production products across web, iOS and Android in a single project cycle.

    Achievements

    • Decreased cross-platform development effort by 35%
    • Reduced codebase complexity by 40% and sped up feature development
    • React.js
    • React Native
    • Redux
    • Jest

  3. Software Engineer

    Protonshub Technologies · Full-time

    May 2022 – Feb 2023 · 10 mos

    Built and maintained React.js web applications supporting 10,000+ monthly active users, with 99.5% uptime.

    Achievements

    • Cut UI-related bug reports by 20%
    • Decreased page load times by 15%
    • React.js
    • JavaScript
    • Redux

Toolbox

Technical expertise

Languages

  • JavaScript (ES6+)
  • TypeScript
  • HTML5
  • CSS3
  • SASS/LESS

Frontend

  • React.js
  • Next.js
  • Material-UI
  • Bootstrap
  • Tailwind CSS
  • Responsive design
  • Code splitting
  • Lazy loading

Mobile

  • React Native (iOS & Android)
  • Expo
  • Apple App Store
  • Google Play Store
  • Firebase
  • Realm DB

Backend

  • Node.js
  • Express.js
  • RESTful API design
  • GraphQL
  • JWT/session authentication
  • Microservices
  • MySQL

State management & APIs

  • Redux
  • Redux Toolkit
  • Redux Saga/Thunk
  • Context API
  • React Query
  • Zustand
  • GraphQL
  • RESTful APIs

Cloud & DevOps

  • AWS
  • Google Cloud Platform
  • Microsoft Azure
  • Firebase
  • CI/CD
  • Jenkins
  • Vercel
  • Docker

Tools

  • Git
  • Jira
  • Postman
  • Figma

Core competencies

  • Performance optimization
  • Jest (automated testing)
  • Payment gateways
  • Admin dashboards
  • System design

Let's talk

Have a project or a role in mind?

Tell me what you are building or hiring for. I usually reply within one or two working days.

Whether it is a new React Native app, a Next.js website, a performance problem or a bug in a live app, send a few details and I will get back to you with next steps.

Prefer email? rajendradeveloper11@gmail.com

Recruiter? View my resume

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