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Rajendra Kumar

About

Hi, I am Rajendra Kumar

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.

Professional background

I am a frontend developer with 5 years of experience building scalable React.js web applications, React Native mobile apps (iOS & Android) and Node.js/Express.js backend services.

I have shipped production-grade products across automotive, e-commerce, healthcare, social networking and parking management, and I have led a team of 5 developers across web, mobile and backend workstreams.

I design reusable component libraries, build RESTful and GraphQL APIs, and integrate Firebase and CI/CD pipelines. I deploy on AWS, Google Cloud Platform and Microsoft Azure with a focus on performance, clean architecture and user experience.

Development approach

  • Start from the user problem, not the framework.
  • Keep the codebase typed, tested and easy for the next engineer to change.
  • Measure performance and accessibility before and after every release.

Skills

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

Career highlights

  • 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.

  • Senior Frontend Developer (React.js, React Native) at Motorpedia365 Revolution Pvt. Ltd. Jul 2024 – Jul 2026 · 2 yrs 1 mo
  • Front End Developer at Pixoatic Solutions Apr 2023 – Apr 2024 · 1 yr 1 mo
  • Software Engineer at Protonshub Technologies May 2022 – Feb 2023 · 10 mos
  • Software Developer at Brainium Information Technologies Pvt. Ltd Jun 2021 – May 2022 · 1 yr

Education

  • Bachelor of Computer Applications (BCA)Jaipur National University, Jaipur, Rajasthan2019 – 2022
  • Intermediate (Class XII): Mathematics & ScienceJawahar Navodaya Vidyalaya, Khairthal, Rajasthan2018 – 2019