JOB DESCRIPTION:
-Firm grasp of the JavaScript language and its nuances, including ES6+ syntax
-Build pixel-perfect, smooth UIs across both mobile platforms
-Leverage native APIs for deep integrations with both platforms
-Diagnose and fix bugs and performance bottlenecks for performance that feels native
-Knowledge of functional and object-oriented programming
-Strong knowledge and experience in either iOS or Android native application development
-Familiarity with native build tools, like XCode, Android Studio

About Matellio India Private Limited
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Position: Senior React Native Developer (4- 7 years)
Location: Remote (Company in Mumbai)
Company: Big Rattle Technologies Private Limited
Immediate Joiners only.
Summary:
We're looking for a seasoned React Native developer who has shipped production-grade mobile apps on both iOS and Android — ideally in the high-traffic, high-stakes world of e-commerce. You'll own the mobile experience end-to-end: architecture, performance, and flawless UX across devices.
Note: We are looking for a senior expert who has delivered multiple apps that are built from scratch and hosted on Apple Store/ Play Store i.e. e2e lifecycle.
KEY RESPONSIBILITIES
- Design and build scalable React Native apps for both iOS and Android from scratch to App Store / Play Store deployment.
- Architect complex e-commerce flows — product catalogues, cart, checkout, payment gateway integration, and order tracking.
- Optimize app performance: reduce TTI, maintain smooth 60fps animations, and manage memory on low-end devices.
- Integrate REST and GraphQL APIs; manage state with Redux Toolkit, Zustand, or React Query.
- Implement push notifications, deep linking, in-app navigation, and offline-first strategies.
- Write clean, well-tested code; maintain CI/CD pipelines using Fastlane, GitHub Actions, or Bitrise.
- Collaborate with designers, backend engineers, and product managers in Agile sprints.
- Conduct code reviews and mentor junior mobile developers.
Required Skills:
Core Mobile
▸ React Native CLI & Expo
▸ TypeScript
▸ React Navigation v6+
▸ iOS (Swift basics) & Android (Kotlin basics) ▸ Xcode & Android Studio
E-commerce & Integrations
▸ Product / Cart / Checkout flows
▸ Razorpay, Stripe, PayPal SDKs
▸ Wishlist, search UX, filters
▸ Order tracking & delivery status
▸ Push notifications & deep linking
State & Data
▸ Redux Toolkit / Zustand
▸ React Query / SWR
▸ REST & GraphQL APIs
▸ AsyncStorage / MMKV
▸ Firebase Realtime DB / Firestore
DevOps & Tooling
▸ Fastlane & GitHub Actions / Bitrise
▸ Jest (unit) & Detox (E2E)
▸ Firebase Crashlytics & Sentry
▸ Flipper / Reactotron
▸ App Store & Play Store deployments
Nice to Have skills: New Architecture · RN Web · AR try-on · RTL support · Shopify SDK · WCAG · Maps SDK
- React Native New Architecture (JSI / Fabric / TurboModules)
- React Native Web or monorepo setups (Nx, Turborepo)
- AR product try-on experiences (ARKit / ARCore)
- Shopify Storefront API or WooCommerce SDK experience
- Accessibility (WCAG mobile) implementation
- Live order-tracking maps (Google Maps / Mapbox)
Required Qualifications:
- Bachelor’s degree in Computer Science, Engineering, or a related technical field.
Why should you join Big Rattle?
Big Rattle Technologies specializes in AI/ ML Products and Solutions as well as Mobile and Web Application Development. Our clients include Fortune 500 companies. Over the past 13 years, we have delivered multiple projects for international and Indian clients from various industries like FMCG, Banking and Finance, Automobiles, Ecommerce, etc. We also specialise in Product Development for our clients.
Big Rattle Technologies Private Limited is ISO 27001:2022 certified and CyberGRX certified.
What We Offer:
- Opportunity to work on diverse projects for Fortune 500 clients.
- Competitive salary and performance-based growth.
- Dynamic, collaborative, and growth-oriented work environment.
- Direct impact on product quality and client satisfaction.
- 5-day hybrid work week.
- Certification reimbursement.
- Healthcare coverage.
Urgently Hiring React-Native App developer.
Job Location : Indore ( work from Office)
Experience needed : minimum 6 months needed ( Strictly No fresher please)
******
1) React-native developer must have expertise in designing as well as development with latest expo cli.
2) Must have expertise in json parsing with web services to make dynamic app.
3) Must have completed some fully dynamic React-native app.
4) He or she can work individually or in a team , immediate joiner will be preferred as we need on urgent basis.
*****
..***..
Proven experience building Mobile Apps using React Native.
Build pixel-perfect, buttery smooth UIs across both mobile platforms.
Leverage native APIs for deep integrations with both platforms.
Management of the application and its integration with back-end services.
Astute sense of User Interface and User Experience design
Managing large sets of data transfer between server and App.
Offline usage with sync capabilities.
Diagnose and fix bugs and performance bottlenecks for performance that feels native.
Reach out to the open source community to encourage and help implement mission-critical
software fixes
Maintain code and write automated tests to ensure the product is of the highest quality.
Transition existing React web apps to React Native.
Rock solid at working with third-party dependencies and debugging dependency conflicts.
Firm grasp of the JavaScript language and its nuances, including ES6+ syntax
Ability to write well-documented, clean Javascript code
Familiarity with native build tools, like XCode, Gradle
Understanding of REST APIs, the document request model, and offline storage
Experience with automated testing suites like Jest
Highly proficient in rendering components with Native APIs
Working experience with APIs and third-party libraries
Experience with FCM or similar.
Highly proficient in one or more libraries (e.g. Redux, React Router, etc) for state managing and
routing in addition to React.
Experience using Git as a control System
React Native Application Developer
Job Description
- As a React Native Developer, your responsibility will include creating a suite of applications and improving the functions of applications in development.
- Experience in building a React or Native mobile app with traffic at scale
- Ability to architect, refractor and debug an app without disrupting users
- Proficient with mobile application life cycles
- Should have multiple apps deployed to the App Store, Google Play Store and deep knowledge of the distribution processes
- Understanding of unit and functional testing best practices.
- Should be able to dive into the source code of front end libraries to debug, patch and extend them when necessary
- Can take a defined software design and turn it into code.
- Understands how to optimize the delivery of code and assets (e.g., images, fonts) to a browser or device (e.g., lazy loading assets, using CDNs, caching, compression, etc.).
- Experience with React Js, React Native, JavaScript including DOM Manipulation and the JavaScript object model. Exp with integrated JSON is a must.
- Thorough understanding of React Native and its core Principles. Hands-on experience on React Native Framework at least 2 Years.
What you will do
- Working collaboratively in building products and services.
- Designing mobile-based features, impacting Customer's Digital Experience
- Taking ownership of the entire software development lifecycle for mobile application
- Collaborating with cross-functional teams to define design and add new features
- Ensuring the performance, quality and responsiveness of the applications.
- Understanding end-user requirements and use cases and translating them into a pragmatic and effective technical solution
Required Candidate profile
- Capability to perform both independently and in a team
- Ideal Candidate - Must be open to work on new technologies, versatile and capable of accepting new challenges.
- Good Knowledge of HTML5, CSS
- Developing new user-facing features using React.js and other JavaScript libraries
- Building reusable cross platform components and front-end libraries for future use
- Expertise with Web Services / REST APIs.
- Translating designs and wireframes into high quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- Maintaining and enhancing existing websites while adhering to best practices
What you need to have:
- Experience in building customer facing cross platform Mobile apps using React Native
- Experience in RESTfull API
- Experience in integrating third party APIs
- Knowledge of React Native, React, Java Script, CSS
- Knowledge in Amazon cloud, Git, MongoDB, Postgress, NGINX
- Knowledge in Node Js(Express Js)
- Strong understanding of sales and FMCG retail/ wholesale
- Deep understanding of user service
- Deep knowledge of running CRM based sales teams and hitting targets
- Problem solver, Empathatic, Energetic, Curious
| JD: |
| Excellent knowledge and experience with React Native |
| Extensive, hands-on experience with modern application development incl. application lifecycle, asynchronous server communication, and UI components |
| Experience with State Management Libraries like MobX or Redux |
| Experience with architecture and implementing component based UI frameworks and design systems |
| Experience with consuming REST APIs |
| Firm grasp of the JavaScript/TypeScript language |
| Ability to write well-documented, clean Javascript code |
| Rock solid at working with third-party dependencies and debugging dependency conflicts |
| Familiarity with native build tools, like XCode, Android Studio |
| Should able to design responsive UI |
| Ability to work with Git |
| Experience working with Swift, Objective C, and Java a plus |
PFB Job description,
Experience to - 4 yr to 7yr
Job Responsibilities :
Design, build, test and maintain scalable and stable off the shelf application or custom-built technology solutions to meet business needs
Write testable code that enables extremely high levels of code coverage
Excellent knowledge on mobile app development cycle, design principles.
Must have the understanding and working knowledge of handle different screen sizes.
Must have worked on deploying app for different platforms(ios and android).
Good knowledge on working with third-party dependencies and debugging dependency conflicts.
Skills Required:
Familiarity of working with TDD/BDD in JS.
Excellent knowledge of HTML5, CSS3, JavaScript.
Excellent knowledge on android and ios UI design principles, patterns and best practices.
Familiarity with native build tools, like XCode, Gradle (Android Studio, IntelliJ)
Excellent knowledge on background services.
Experience with offline storage, threading and performance tuning.
Experience in working with remote data via REST and JSON.
Familiarity with cloud message API and push notification
This is for a 1-2 month project, and can be extended for up to 6 months.
Ready to start ASAP with the right candidate.









