Numan

• React Native product development

  Build and ship new React Native apps with Expo, TypeScript, and a production-ready release process.

• Mobile performance optimization

  Improve startup time, rendering, image handling, animations, and app stability on iOS and Android.

• Full-stack delivery

  Connect mobile apps to Node.js, Next.js, and API backends so the whole product moves together.

• React Native Performance Optimization

  A pillar guide for reducing startup time, improving rendering, and fixing the most common performance bottlenecks.

• Expo vs Bare Workflow

  A decision guide for teams choosing the right React Native setup.

• React Native App Architecture

  A practical guide to structuring production React Native apps for growth.

• React Native State Management

  A practical guide to choosing local state, Context, Redux, Zustand, and more.

• React Native Memory Leaks

  A debugging guide for memory growth, crashes, and cleanup issues.

• React Native New Architecture

  A guide to modern architecture changes, migration tradeoffs, and production checks.

• Expo App Development

  A practical page for teams that want faster mobile delivery with Expo and React Native.

• iOS App Development

  A service page for teams that need Swift and SwiftUI support for production iPhone apps.

• Android App Development

  A service page for Kotlin, Compose, and production Android delivery.

• Cross-Platform Mobile App Development

  A service page for founders comparing one codebase across iOS and Android.

• React Native Mobile App Development Services

  A commercial service page for people comparing React Native, iOS, and Android development help.

• Hire a React Native Developer

  A service page for founders and startups who need a senior engineer for mobile delivery.

• React Native App Security

  A high-intent guide covering secure storage, jailbreak/root detection, SSL pinning, and anti-tampering.

• React Native Debugging

  A guide for isolating crashes, regressions, and production issues faster.

• React Native Testing

  A practical guide for protecting critical flows with unit, component, and end-to-end tests.

• React Native Deployment

  A guide to App Store and Play Store releases, CI/CD, and safer shipping workflows.

• 🗜️  react-native-compressor 🔑  react-native-keys 🤫  react-native-decompiler 🪓  react-native-component-splitter 😂  github-emoji-extension

• Proficient:

  React Native, Expo, Native Android (Compose), Native IOS (SwiftUi), Algorithms, React, Next.js, Node.js, Express.js (MERN)

• Familiar:

  Javascript, Typescript, Kotlin, Java, Objective C, Swift, MVVM, Dragger, Hilt, Ruby, PHP, Asp, C#

• Libraries:

  Jest, IAP (Mobile Pay), Apple Pay, Stripe, Apollo GraphQL, AWS S3, web3.js

• Databases:

  MongoDB, MySQL, Redis, SQL Server, SQLite

• Also Worked:

  Crypto, Stocks, Aquanow, Alpaca, Leantech, Onfido, Plaid, Dwolla, Checkout2, Tabby, Tamara, Knet, QPay, Stc Pay, Subscriptions, Dexguard, Elastic Search, Typesense, Agentic AI, MCP, Machine Learning, LLM

• Github:

  CI/CD, Github Actions, Fastlane, Cherrypick, Reflog, Patch, Apply

• Analytics:

  Clevertap, Rudderstack, Adjust, WebEngage, Appboy(Braze), GA4, Datadog, Metabase, Clickhouse, Big Query

• • React Native Reanimated, React Native Skia and React Native Gesture Handler for Animation on 60FPS
  • React Native Brownfield for integrating native app
  • React Native Uniwind, React Native Restyle for styling
  • HeroUi Native, Expo Ui for native components
  • Hermes V1, React Native Nitro, TurboModule, Fabric Renderer
  • Also having 33 concepts of JavaScript https://github.com/leonardomso/33-js-concepts

Proficient

• React Native

  Expo

  React

  Next.js

  Native Android (Compose)

  Native IOS (SwiftUi)

  Node.js

  Express.js (MERN)

  Algorithms

Familiar

• Javascript

  Typescript

  Kotlin

  Java

  Swift

  Objective C

  MVVM

  Dragger

  Hilt

  Ruby

  PHP

  Asp

  C#

Libraries

• Jest, IAP (Mobile Pay), Apple Pay, Stripe, Apollo GraphQL, AWS S3, web3.js

Databases

• MongoDB, MySQL, Redis, SQL Server, SQLite

Analytics

• Clevertap, Rudderstack, Adjust, WebEngage, Appboy(Braze), GA4, Datadog, Metabase, Clickhouse, Big Query

Also Worked

• Crypto, Stocks, Aquanow, Alpaca, Leantech, Onfido, Plaid, Dwolla, Checkout2, Tabby, Tamara, Knet, QPay, Stc Pay, Subscriptions, Dexguard, Elastic Search, Typesense, Agentic AI, MCP, Machine Learning, LLM

Github

• CI/CD, Github Actions, Fastlane, Cherrypick, Reflog, Patch, Apply

Mobile Apps

• Mobile - Frameworks & Libraries

  React Native, Expo, Android, IOS

• Languages

  JavaScript, Typescript, Swift, ObjectiveC, Java, Kotlin, SwiftUI, Jetpack Compose, HTML, CSS

• Native Android

  Jetpack Compose, XML, MVVM, Kotlin, Java, Dragger, Hilt, Dependency Injection, Retrofit, RoomDb

• Native IOS

  SwiftUI, UIKit, Swift, ObjectiveC, Alamofire, MVVM, RxSwift

• Mobile App security

  Javascript obfuscation, Java obfuscation, Certificate SSL pinning, Jailbreak/Root detection, Secure Envs files through c++ and encryption, Anti-tampering measures, App Check for preventing backend apis abuse.

• Components

  Class_base, Functional_components and Styled_components

• State Management

  Redux, MobX, Classes, Recoil, jotai, zustand & React Context API

• Networking

  Rest APIs, GraphQL, Firebase APIs, Socket.io, SignalR, PubNub

• Google Map

  Places Auto Complete, Geocoding, Geolocation, Directions

• Chat App

  Socket.io, SignalR, Firebase, Twilio

• Audio/Video

  Calling/Streaming: Agore.io, Twilio & WebRTC

• Notifications

  Firebase, Apns, OneSignal & PubNub

• Analytics

  Google Crash Analytics, Firebase, Sentry & branch.io

• Campaign tools

  Appboy, Clevertap

• Search

  Elastic Search, Typesense, Algolia

• In-App Ads

  Google AdMob, Facebook Ads

• Social Logins

  Facebook, Google, Instagram, Apple login

• Layout Animations

  react-native-reanimted, react-native-skia, react-native-interactible

• Performance Improvement

  Turbo Module, Fabric renderer, JSI, Virtualization, Profiling, Flashlist, memo and useMemo, Performance monitoring through flipper plugins

Web, Backend & Others

• Website

  React Js, NextJS, React Remix

• Back-end - Node.js frameworks & libraries

  Node js, Express, Puppeteer, Socket.IO, ASP WCF, Php

• Databases

  MongoDB, MySQL, MSSQL, SQLite, Postgresql, Redis

• Query languages

  SQL, MongoDB Queries, GraphQL

• Programming/Markup/Stylesheet/Notation languages

  Javascript [ES5, ES6, ES7, ES8] (Browser and Node.js), TypeScript, PHP, JSON, JSX

• Preprocessors/Static type checkers

  Flow, SASS, LESS

• Front-end- Frameworks & Libraries

  React, Redux, Ant design, jQuery, Axios, Lodash, Bootstrap, Styled components

• Linting/Code Quality Tool

  Eslint, JSLint, Standard JS

• Prototyping

  Figma, Zeplin, Adobe XD, Sketch

• Version control

  GIT, SVN, CVS

• Test tools

  Jest, Mocha, Chai

• CMS

  WordPress (plugins, themes and widgets)

• Dependency managers

  Composer, Yarn, Npm, Bower, Make own custom package manager

• Module bundlers & Task runners

  Webpack, Metro

• Work/Deployment environment

  Docker, kubernetes, Heroku, Digital Ocean, Linode, Generic shared hosts, Vps Window server, Aws ubuntu instance, Firebase

• Touched with

  Javascript , IOS(swift) , Android , MongoDB , AWS , Docker , destroy the structure of frameworks , Find loophole/vulnerability in coding level, next to move in protocol level or physical layer

• New Intrests

  Ecosystem building, Problem-solving, Protocols, Hacks, Algorithms

• Left technologies

  Php (wordpress, laravel, codeignitor), ASP .Net and MVC, C# window Forum, Unity, R Language, Android, java, scala, C/C++, Sql Injections

• Others

  Babel, Storybook, REST, MVC, ORM, OOP, AWS (S3), Functional programming, SOLID, Natural Language Processing, Scrum, Continuous Integration, Continuous Delivery, Progressive web apps, Performance, Usability, Accessibility, SEO, Terraform

• 

  Sr. Full Stack Mobile EngineerNinja | Saudi - Remote

  January 2022 – Currently Working

  • Developed a multicategory grocery and food delivery app from scratch using React Native and IPA web using Next JS, attracting millions of users with thousands of daily orders
  • Implemented complex payment systems including Apple Pay, credit/debit pay, Tap Pay, Wallet Pay, and others
  • Tech Stack: React Native, Expo, Next.js, Node.js, JavaScript, TypeScript, Java, Kotlin, Objective-C, Swift, Docker, GraphQL, TypeSense, Elastic Search, Socket Stomp, JNI, Detox

• 

  Full Stack Software EngineerShobbak | Saudi - Remote

  March 2021 – January 2022

  • App based Platform where we can buy and sell Products (such as Car, Furniture), Services and properties
  • Worked on the mobile app using React Native as well as some services like chat service on the backend using node JS
  • Tech Stack: React Native, Expo, React JS, Node JS, JavaScript, Typescript, Java, Kotlin, ObjectiveC, Swift, Socket.io Redis, Fastlane, CI/CD, Kubernates, TerraForm

• 

  Full Stack Software EngineerThe Entertainer | Dubai - Remote

  February 2019 – March 2021

  • Have many white label apps which covered Buy one Get One, Hotels, Travels and Retail, Al Futtaim was one of our clients
  • Along Mobile app Development, We Also Developed Web Portal which can make apps in 5 minutes by selecting modules
  • Worked on The Entertainer, Chalhoub Entertainer and multiple white labels Mobile apps using react native
  • Tech Stack: React Native, Expo, React JS, Node JS, JavaScript, Typescript, Java, Kotlin, ObjectiveC, Swift, Saas, MongoDB

• 

  Full Stack Software EngineerDynamic Logix

  January 2018 – February 2019

  • Build Zirtue Mobile app using React Native along with backend using Node JS and Web Portal Admin Panel using React JS
  • Also Build couple of apps and web portal like Workout Timer app Using RN etc
  • Tech Stack: React Native, MERN, Typescript, Java, Kotlin, ObjectiveC, Swift, Redux, Firebase, Dwolla, Plaid, Stripe

• 

  Mobile App Engineer + Full Stack Software EngineerUpwork

  Jan, 2017 - Dec, 2017

  Worked on React Native, React js, Node js.

• 

  Mobile App Engineer + Full Stack Software EngineerFiverr

  Jan, 2017 - Dec, 2017

  Worked on React Native, React js, Node js.

• Completed BSc in Computer Science Engineering with CGPA 3.42Comsats University

  January 2014 – September 2018

• ICSSuperior College

  2012 - 2014

• MatricSuperior School

  2010 - 2012

• • Having 25k+ Reputation on StackOverFlow
  • iPhone 15 featured my "React Native (Mobile) App Dynamic Island (Notification)" on its official website
  • Contributed into React Native Core, Expo Core and React Native Reanimated
  • Author of React Native Compressor and React Native Keys Open source packages
  • Have more than 70k+ weekly downloads for my one of React Native Package

• 

  Ninja | Grocery & Food Delivery (Unicorn 1 Billion USD) - 60k+ Reviews, 4.8 Rating

  ANDROID IOS

  Ninja Mobile App -> 60k+ Reviews and 4.8 rating. Unicorn 1 Billion USD company. Ninja App is handling Four Verticals deliveries: Grocery (Super Market) like Flink, Restaurant, Beauty, Pharmacy (Medicines + Doctor consultation). Order groceries via our app and in 30 minutes we'll deliver your shopping right to your door.

  Video

  • Javascript
  • React Native
  • React
  • Redux
  • Localization
  • Localazy
  • MVVM
  • Dragger
  • Hilt
  • Dependency Injection
  • SwiftUI
  • GitHub Action
  • Node JS
  • Socket Stomp
  • GraphQL
  • Detox
  • Kubernetes
  • kubernetes
  • Terraform
• 

  The ENTERTAINE‪R

  ANDROID IOS

  The ENTERTAINER is the moneysaving app that’s packed with the 2-for-1 offers everyone wants.

  • Javascript
  • React Native
  • React
  • Redux
  • Braze
  • JNI
  • Localization
  • localazy
  • Theme
  • react-native-reanimted
  • react-native-interactible
• 

  Shobbak | Buy and Sell Anything (Like OLX)

  ANDROID IOS

  Shobbak app is an online flea market from KSA. This app provides an open space to sell all kinds of goods, new or used.

  • Javascript
  • React Native
  • React
  • Redux
  • Localization
  • Node JS
  • Socket.io
  • Ruby on rail
  • Kubernetes
  • Fastlane
  • CI/CD
  • kubernetes
  • Terraform
• 

  Zirtue

  ANDROID IOS

  Zirtue is a relationship-based lending application that simplifies loans between friends, family and trusted relationships with automatic ACH loan payments. I worked Full Stack Software Engineer on it.

  Video

  • Javascript
  • React Native
  • React
  • Redux
  • SASS
  • Node Js
  • MongoDB
  • Firebase (chat)
• 

  Wibb

  Wibb manage the US Party System through app.

  Video

  • Javascript
  • React Native
  • React
  • Redux
  • Localization
  • Theme
  • Payments
  • Firebase
  • react-native-reanimted
  • react-native-interactible
• 

  Workout Timer

  ANDROID IOS

  Workout Timer is fully customizable interval timer that dictates each exercise. Create as many different sets as you want and how many rounds you want to do them for. Great in the gym, at home, or outdoors.

  Video

  • Javascript
  • React Native
  • React
  • Redux
  • react-native-background-timer
• 

  Chalhoub ENTERTAINER

  ANDROID IOS

  Chalhoub Group ENTERTAINER will transform the way you enjoy your experiences, with unbeatable Buy 1 Get 1 Free offers in dining, beauty, retail, everyday services, entertainment and fitness.

  • Javascript
  • React Native
  • React
  • Redux
  • Braze
  • JNI
  • Localization
  • Theme
  • react-native-reanimted
  • react-native-interactible
• 

  Masterpiece

  Masterpiece manage Employee Shifts and tasks.

  Video

  • Expo
  • Javascript
  • React Native
  • React
  • Mobx
  • Firebase
• 

  ENTERTAINER X Circles.Lif‪e

  ANDROID IOS

  The ENTERTAINER X Circles.Life App brings you unbeatable value with thousands of Buy 1 Get 1 Free dining, leisure, wellness, entertainment and hotel accommodation offers across Singapore, Malaysia, Bali, Hong Kong and London.

  • Javascript
  • React Native
  • React
  • Redux
  • Braze
  • JNI
  • Localization
  • Theme
  • react-native-reanimted
  • react-native-interactible
• 

  Roumaan (Ecommerce)

  Roumaan.com brings to you online shopping like never before. Download the app & enjoy the best deals in Middle East.

  Video

  • Javascript
  • React Native
  • React
  • Redux
  • WooCommerce
• 

  The Emirates Touris‪m‬

  ANDROID IOS

  The Emirates Tourism app brings you great value with ‘Buy One Get One Free’ and ‘Discount Offers’ across attractions, hotels and restaurants in Unites Arab Emirates..

  • Javascript
  • React Native
  • React
  • Redux
  • Braze
  • JNI
  • Localization
  • Theme
  • react-native-reanimted
  • react-native-interactible
• 

  Horizon App Builder Portal (One X Plateform)

  One X Plateform is an App Builder which enable non-technical person make apps (PWA, Expo, Expokit) through combining module from the web portal.

  • Javascript
  • React
  • Redux
  • SASS
  • AWS
  • REST
  • Node.js
  • MongoDB
  • EC2
  • S3
  • Socket
  • NODE CLI

• What can a senior React Native developer help with?

  Everything from new app builds to app store releases, performance work, backend integration, native modules, and debugging production issues.

• Do you work with Expo and native Android/iOS code?

  Yes. I use Expo when it fits the product, and I can go native with Kotlin, Swift, Compose, or SwiftUI when the app needs deeper platform control.

• Can you help a startup grow traffic and users?

  Yes, but SEO works best when the site has useful pages for searchers. The homepage is now optimized, and the next step is to add topic pages and guides that target actual search demand.