Portrait of Rahul Kumar Jaiswal, Senior React Native / Mobile Engineer

Rahul Kumar Jaiswal

Senior React Native / Mobile Engineer

Available • Immediate Joiner

Senior React Native / Mobile Engineer building production-grade mobile experiences.

7+ years building and shipping production applications, with 6+ years specializing in React Native across iOS and Android, plus hands-on React.js web development, GraphQL, native integrations and CI/CD.

View Projects Download ResumeLet’s Connect
  • React Native
  • React.js
  • TypeScript
  • GraphQL
  • Performance
  • AI / GenAI
India · Open to Relocation LinkedIn GitHub rahuljaiswal3294@gmail.com

About

Senior engineer, production-first mindset

Rahul Kumar Jaiswal is a Senior React Native / Mobile Engineer with 7+ years of software development experience and 6+ years specializing in React Native. Building production-grade mobile and web experiences with a focus on performance, scalable architecture, clean engineering and real-world product delivery.

Core expertise

  • React Native
  • React.js
  • TypeScript
  • JavaScript
  • Redux Toolkit
  • RTK Query
  • Redux Saga
  • Zustand
  • React Query
  • GraphQL
  • Apollo Client
  • REST APIs
  • Firebase
  • Native Android/iOS
  • Fastlane
  • CI/CD
  • Jest
  • Generative AI

Engineering strengths

  • Mobile application architecture
  • Feature-based architecture
  • Reusable component development
  • Performance optimization
  • Rendering optimization
  • Startup-time optimization
  • Memory optimization
  • Smooth UI and animation performance
  • GraphQL and REST APIs
  • Caching
  • Cursor-based pagination
  • Authentication
  • Social login
  • Payments
  • Subscriptions
  • Push notifications
  • Native Android/iOS integrations
  • React Native native modules
  • CI/CD
  • Release automation
  • Offline-first concepts
  • Local storage and data persistence
  • Production debugging
Years Software Development
7+Years Software Development
Years React Native
6+Years React Native
Production Applications
8+Production Applications
Application Startup-Time Improvement
~30%Application Startup-Time Improvement

Experience

Seven years shipping production software

Roles focused on cross-platform mobile delivery, architecture, performance and release automation.

  1. Senior React Native Developer

    Protonshub Technologies — A CMMI Level 5 Company

    Aug 2021 – Dec 2025Indore, India

    • Delivered and maintained production-grade cross-platform applications for iOS and Android using React Native, TypeScript and JavaScript.
    • Designed scalable mobile architecture, reusable components and modular features to improve maintainability and delivery velocity.
    • Integrated REST and GraphQL APIs, Apollo Client, authentication, social login, OIDC, push notifications, analytics and third-party SDKs.
    • Implemented payment and subscription workflows with Stripe, RevenueCat, Superwall and platform billing.
    • Reduced application startup time by approximately 30% through rendering, FlatList, memoization and JavaScript/UI thread optimization.
    • Implemented Firebase Crashlytics and Sentry monitoring with production debugging workflows for critical issues.
    • Automated mobile builds and releases with Fastlane, CI/CD and GitHub Actions.
    • Built React Native native modules and bridging for native Android capabilities.
    • Added Jest and React Native Testing Library coverage for reusable components and application behaviour.
    • Worked with Redux Toolkit, RTK Query, Redux Saga, Zustand and React Query for client and server state.
    • Contributed to architecture, estimation and feature design; mentored junior React Native developers.

  2. Android & React Native Developer

    ZeeweeSoft

    Jan 2019 – Jul 2021Indore, India

    • Developed and maintained cross-platform mobile applications with React Native, JavaScript and TypeScript.
    • Migrated a legacy native Java Android application toward React Native, enabling substantial code reuse across Android and iOS.
    • Integrated REST APIs and handled application data, authentication and error states with backend teams.
    • Implemented forms, navigation, push notifications, local storage, deep linking and third-party SDK integrations.
    • Worked with React Navigation, AsyncStorage, Firebase and Gesture Handler following React Native best practices.
    • Assisted with analytics, production monitoring, debugging, performance improvements and device testing.

Education

B.Tech in Instrumentation Engineering

Delhi University · 2013 – 2017

Projects

Shipped, production applications

Real products on the App Store, Google Play and the web, plus production work shown without confidential client information.

Gazinta

MobileWeb

React Native + React.js · Inventory Management

Gazinta is a production mobile and web platform designed to simplify harvest tracking and meat inventory management.

  • QR code labeling and scanning
  • JWT mobile-to-web authentication handoff
  • Stripe subscription workflows
  • Reusable component system across mobile and web
  • React Native
  • TypeScript
  • React.js
  • Stripe
  • JWT
  • Google/Apple SSO
  • Lottie
Live WebsiteApp StoreGoogle Play
Case study

2NITE

MobileWeb

React Native + React.js · Music Events & Ticket Discovery

2NITE is an event discovery platform focused on concerts, parties, clubs and music events.

  • Animated headers driven by onScroll
  • onViewableItemsChanged list behaviour
  • Timezone-aware and location-based event handling
  • Dark/light mode support
  • React Native
  • React.js
  • Firebase Cloud Messaging
  • Google AdMob
  • Localization
Live WebsiteApp StoreGoogle Play
Case study

YLanes

Mobile

React Native · Audio / Video Platform

YLanes is an audio/video platform built with React Native, focused on HD audio and video conversations.

  • React Native
  • Zoom SDK
  • HD audio/video conversations
  • Audio/video communication
  • Cross-platform mobile development
  • React Native
  • Zoom SDK
App StoreGoogle Play
Case study

Master Phil Kettlebells / Phil Ross Fitness

Mobile

React Native · Fitness / Self Defense

Cross-platform fitness and self-defense application providing subscription-based video content and training experiences.

  • React Native
  • Superwall
  • RevenueCat
  • In-App Purchases
  • Android/iOS
  • Remote video streaming
  • React Native
  • Superwall
  • RevenueCat
  • In-App Purchases
  • Android/iOS
App StoreGoogle Play
Case study

UTS Live

Mobile

React Native · Sports / Tennis

Production project — selected technical details shown without confidential client information.

  • React Native
  • Live streaming video integration
  • Mobile user engagement
  • React Native
  • Live streaming video

Production project — selected technical details shown without confidential client information.

Incluzon

Mobile

React Native · Job Placement Platform

Production project — selected technical details shown without confidential client information.

  • React Native
  • Level-wise dashboards
  • MCQ engine
  • Checkbox/radio/image-based questions
  • React Native

Production project — selected technical details shown without confidential client information.

The Home Game

Mobile

React Native / Expo · Poker Tracking

Production project — selected technical details shown without confidential client information.

  • Expo
  • Win probability calculator
  • Custom card picker
  • Reanimated
  • Gesture Handler
  • Expo
  • React Native
  • Reanimated
  • Gesture Handler

Production project — selected technical details shown without confidential client information.

Ranky

Mobile

Android / Java · Fitness Tracking

Production project — selected technical details shown without confidential client information.

  • Android Java
  • Google Fitness API
  • Steps
  • Calories
  • Sleep tracking
  • Android
  • Java
  • Google Fitness API

Production project — selected technical details shown without confidential client information.

React.js

Beyond Mobile — React.js Web Development

Alongside my React Native specialization, I have hands-on React.js experience contributing to web experiences connected to production applications.

React Native · Mobile Application React.js · Web Application

Gazinta Web

Web: React.js, reusable components, responsive web interfaces, authentication integration, subscription-related workflows, inventory-related web workflows.

Live Website
React Native · Mobile Application React.js · Web Application

2NITE Web

Web: React.js, responsive event discovery interfaces, event listing, event discovery, location-based event discovery, business/event portal integration.

Live Website

Open Source

Published npm Package

Open-source React Native tooling, published to npm with automated release workflows.

react-native-country-code-and-currency-picker

Reusable React Native package built with React Native and TypeScript, providing country and currency selection, country/calling-code search, flags, optional phone input and customizable UI for iOS and Android.

  • Responsive layouts and accessibility support
  • Optimized FlatList rendering for large country lists
  • Configured npm publishing and release automation using GitHub Actions and OIDC-based authentication.
View on npm View on GitHub

Expertise

Technical Expertise

Tools and technologies used across production mobile and web delivery.

Mobile Development

  • React Native
  • Expo
  • React Navigation
  • React Hooks
  • iOS
  • Android
  • Hermes

Web Development

  • React.js
  • TypeScript
  • JavaScript (ES6+)
  • Responsive UI

State Management

  • Redux Toolkit
  • RTK Query
  • Redux Saga
  • Zustand
  • React Query

API & Data

  • GraphQL
  • Apollo Client
  • REST APIs
  • Caching
  • Cursor Pagination
  • JWT / OIDC
  • Social Login

Backend Services

  • Firebase
  • Cloud Messaging
  • Crashlytics
  • Analytics
  • Branch.io
  • Mixpanel
  • CleverTap

Payments

  • Stripe
  • RevenueCat
  • Superwall
  • In-App Purchases
  • Google Play Billing

Native Development

  • Android
  • Java
  • Native Modules
  • React Native Bridging

DevOps / CI/CD

  • GitHub Actions
  • Fastlane
  • CI/CD
  • Release Automation
  • App Store
  • Google Play
  • AWS Amplify
  • npm Publishing

Testing & Debugging

  • Jest
  • React Native Testing Library
  • Crashlytics
  • Sentry
  • Production Debugging

Performance

  • Rendering Optimization
  • FlatList / VirtualizedList
  • Memoization
  • Startup Optimization
  • Lazy Loading
  • JS/UI Thread Optimization

AI / GenAI

  • Generative AI
  • Prompt Engineering
  • AI Agents
  • AI-assisted Development

Performance

Performance Engineering

Performance work grounded in profiling, measurement and shipping — not guesswork.

Main achievement

Reduced application startup time by approximately 30%.

  • Rendering optimization
  • FlatList optimization
  • Memoization
  • Startup-time optimization
  • Animation optimization
  • JavaScript/UI thread analysis
  • Memory optimization
  • Smooth UI performance
  • Production debugging

Optimization loop

  1. 01Problem
  2. 02Profile
  3. 03Identify Bottleneck
  4. 04Optimize
  5. 05Measure
  6. 06Ship

Architecture

Architecture & Engineering

Structure that keeps production applications maintainable as teams and features grow.

  1. UI Layer

    Screens · Reusable components · Animations

  2. Feature Modules

    Feature-based architecture · Modular architecture · Native modules

  3. State & Server State

    State management · Server-state management · Caching

  4. Data Layer

    REST APIs · GraphQL · Apollo Client · Cursor pagination

  5. Persistence

    Local persistence · Offline-first concepts

Representative architecture — simplified for portfolio presentation.

Focus areas

  • Feature-based architecture
  • Reusable components
  • Modular architecture
  • State management
  • Server-state management
  • REST APIs
  • GraphQL
  • Apollo Client
  • Caching
  • Cursor pagination
  • Offline-first concepts
  • Local persistence
  • Native modules

AI / GenAI

Generative AI & AI-Assisted Development

Actively expanding my expertise in Generative AI and AI-assisted software development, applied to engineering workflows and product thinking.

Topics

  • Generative AI
  • LLM fundamentals
  • Prompt Engineering
  • AI Agents
  • AI-powered products
  • AI-driven workflows
  • AI-assisted software development

Generative AI complements my React Native and software engineering specialization — applied to development workflows and product thinking rather than replacing my core expertise.

Generative AI Mastermind

Outskill

  • Generative AI
  • AI Agents
  • Prompt Engineering
  • AI-powered Products
  • AI-driven Workflows
View Certificate

Certifications

Certifications

Outskill Certificate of Completion for Generative AI Mastermind awarded to Rahul Kumar Jaiswal

Generative AI Mastermind

Outskill

  • Generative AI
  • AI Agents
  • Prompt Engineering
  • AI-powered Products
  • AI-driven Workflows

Contact

Let's Build Something Great

Open to Senior React Native, Senior Mobile Engineer and Lead Mobile Engineer opportunities.

Immediate Joiner
Email
rahuljaiswal3294@gmail.com
Location
India · Open to Relocation
LinkedIn GitHub Email Download Resume