Hybrid Mobile App Developer

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.

Role: React Native Developer

Experience: 3-5 years

Location: Jaipur

Work Mode: 5 Days working

✨ What We Need:

a. React Native & JavaScript/TypeScript expertise.

b. Experience with OAuth, SSO, REST APIs & Firebase.

c. 3-4 published mobile apps (Android & iOS).

d. App store publishing experience.

e. Strong problem-solving abilities.

About the Opportunity

We are seeking a passionate React Native Developer to join our growing mobile development team. This role is ideal for candidates eager to build high-quality cross-platform apps and grow their career in mobile development.

What You Will Do

• Build and deploy cross-platform mobile applications using React Native
• Collaborate with designers and backend developers to deliver features
• Debug, test, and optimize app performance
• Stay updated with mobile development best practices

The Skills You Bring

• Strong knowledge of JavaScript/TypeScript, ReactJS and React Native
• Familiarity with REST APIs and third-party integrations
• Understanding of mobile UI/UX principles
• Problem-solving mindset and willingness to learn

Job Description-

We are looking for a React Native Lead interested in building performant mobile apps on both the iOS and Android platforms. You will be responsible for architecting and building these applications, as well as coordinating with the teams responsible for other layers of the product infrastructure. Building a product is a highly collaborative effort, and as such, a strong team player with a commitment to perfection is required.

Responsibilities

Build pixel-perfect, buttery 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. Reach out to the open source community to encourage and help implement mission-critical software fixes—React Native moves fast and often breaks things. Maintain code and write automated tests to ensure the product is of the highest quality. Transition existing React web apps to React Native.

Skills

Firm grasp of the JavaScript {​{​and TypeScript or ClojureScript}​}​ language and its nuances, including ES6+ syntax Knowledge of {​{​functional or object-oriented}​}​ programming 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, Gradle {​{​Android Studio, IntelliJ}​}​ Understanding of REST APIs, the document request model, and offline storage Experience with automated testing suites, like {​{​Jest or Mocha}​}​

Office Location: Goregaon Mumbai

Position description:

2+ years of development experience with mobile application development for Android.

Primary Responsibilities:

• Work closely with the core team for coming up with new features and implementing them
• Work on new products and services
• Provide support to existing applications
• Integrate REST services into mobile applications

Required Skills:

Mandatory: Passionate about sports, Problem solving, Team player, Target & Result oriented.

Functional Skills: Kotlin, Retrofit, Room Db, GSON, (Room/SQLite), MVVM, MVP, MVC, Work Manager, Rx java, Dagger 2, Recyclerview, Custom Solutions & Custom Views, GIT & JIRA.

Job Description

We are looking for frontend web developers passionate towards building high-performance web applications who can carry out the responsibilities of the core tech team. It's an ideal opportunity for self-driven individuals who love to find innovative solutions.

Daily Responsibilities

• Build cutting edge application using React Native
• Build high quality, performance applications with a good understanding of code organisation.
• Build pixel-perfect, buttery 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.
• Maintain code and write tests to ensure the product is of the highest quality.
• Application deployments on app store and play store.
• Taking the responsibility and ownership of the given tasks.

Requirements

• Firm grasp of the TypeScript language and its nuances, including ES6+ syntax
• Ability to write well-documented, clean TypeScript code
• Rock solid at working with third-party dependencies and debugging dependency conflicts
• Knowledge of object-oriented programming
• Familiarity with native build tools, like XCode, Gradle(Android Studio/IntelliJ)
• Understanding of REST APIs, the document request model, and offline storage
• Experience with automated testing suites, like Jest/Mocha
• Minimum work experience of 1.5-2 years

• Cross-platform mobile app developers who have developed mobile apps with a familiarity of Ionic/Flutter
• Develop and Manage Mobile Application in Hybrid - Android / iOS Platform
• Mobile app architecture planning
• Mobile app design and optimization, able to provide a solution to improve mobile app quality, understand emerging technologies, standards and best practices to bring mobile app product to the next level
• Continuously discover, evaluate, and implement new technologies and frameworks to maximize development efficiency
• Estimate timelines and deliver as per schedule
• Solid knowledge of mobile app development practices, along with mobile testing tools and techniques
• Expertise in optimizing the app for performance
• Experience using agile principles and methodologies
• Deep understanding of the mobile landscape and behavior patterns is mandatory

Responsibilities

• Developing new features and user interfaces from wireframe models
• Ensuring the best performance and user experience of the application
• Fixing bugs and performance problems
• Writing clean, readable, and testable code
• Cooperating with back-end developers, designers, and the rest of the team to deliver well-architected and high-quality solutions

Qualifications

• Desire to work in a startup environment, able to self-manage and work remotely
• Must have built apps on Android and/or iOS apps with Flutter/ React Native/ Xamarin/ Ionic/cordova etc
• Proven working experience in software development
• Working experience in mobile development
• Have published one or more mobile apps in Google Play or App Store
• Experience with third-party libraries and APIs
• Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
• Solid understanding of the full mobile development life cycle, including automated testing and building
• Experience working in an agile development process
• Be proficient in using version control and continuous integration, with tools such as Git and Jenkins.
• Write clear, maintainable and testable code