
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.

About Big Rattle Technologies
About
Connect with the team
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Salary: ₹12,000.00 - ₹16,000.00 per month
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Industry: Software Development
COVID-19 Precaution(s):
Temperature screenings
Social distancing guidelines in place
Sanitising, disinfecting, or cleaning procedures in place
Ensure product delivery is fast, low-cost and sustainable.
Take responsibility from development to customer support.
Research and implement things wherever needed, improve efficiency using
automation, and methods like test driven development.
Setting up events for user, performance and error analytics.
Participate in product and design ideation, collaborate with the team to
implement high-quality features.
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2+ years of experience in software development preferably B2C experience.
Experience in React native, Javascript.
Experience with popular React workflows (such as Flux or Redux).
Familiarity with newer specifications of ECMAScript (ES6 & ES5 ).
Familiarity with RESTful APIs.
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Working knowledge of git for version control.
Understanding of Unix tools.
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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.
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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
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Hey
We are looking for freelance iOS Developers for our new startup.
If you believe you are a developer who can follow all best practices and create quality apps, only then apply for this job.
We can allow you to work on your desired time frames each week, but we are strict about deadlines.
We expect you to be good at
- Managing rest services
- Managing cache and permanent storage
- Preparing pixel perfect UI which is compatible with all screen sizes (designs will be given)
- Daily pushing your code using Git
- Writing clean and understandable code
All the best!







