React Native 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.

We’re looking for Android Mobile Application Developer who has solid knowledge of Android application’s life cycle, specially in modern mobile application. We need someone to build the native applications for Android using Java & Kotlin on Android Studio. You’ll need to create applications from scratch or configure the existing applications.

RESPONSIBILITIES:

Design and implement applications from initial concept, app architecture, and user interface to finished deliverable.
Implement new features, enhancements, and content of existing applications.
Good knowledge of Android SDK, different versions of Android, and how to deal with different screen.
Create and update re-usable code libraries to streamline app development cycle.
Contribute to all phases of the product development: design, develop, test, maintain and improvise.
BASIC SKILLS:

Good communication and interpersonal skills.
Strong knowledge of current Android development languages (Java & Kotlin).
Ability to manage multiple projects at a time.
Flexibility and eagerness to identify, learn, and use new and changing technologies.
Self confident and enthusiastic.

Key Competencies:

• 2+ years of experience in React-Native based app development is a must.
• Must have published at least 1 major React-Native app
• 2+ years of experience in building consumer facing Mobile Applications in React or

React Native (Layouts, animations, etc.)

• Strong UX/UI design exposure and experience in making apps work intuitively and with pixel perfect interfaces.
• Good understanding of Design and Architecture Patterns
• Strong focus on app performance
• Sound knowledge of any type of mobile app development Native(android) or Hybrid.
• Good Experience of working in React Native and its supporting architectures.
• Proficient in JavaScript, CSS, HTML5
• Strong working experience with third-party dependencies and debugging dependency conflicts.
• Ability to quickly learn React Native with Redux.
• Ability to write clean code.
• Familiarity with version control management system (e.g. git)
• Knowledge of Scrum development and DevOps

• Good time management, interpersonal and communication skills, team player.

Roles/Responsibilities: 

• Work on React Native on the front end to develop Android/iOS Apps.
• Write JavaScript code in React native for the app logic. Write business logic using Reducers, Actions and Redux framework.
• Create Android/iOS specific UI for Mobile apps.
• Integrate with Native plugins or custom written plugins for specific platforms.
• Write Modular, organized and robust code.
• Write Unit tests for your code.

As a Flutter Developer, you will be responsible for designing and developing high-quality mobile applications using the Flutter framework. Your primary focus will be on creating elegant, performant, and responsive user interfaces (UIs) that deliver a seamless user experience across multiple platforms. You will collaborate with a team of software engineers, designers, and product managers to transform requirements into fully functional mobile applications.

Key Responsibilities:

• Develop mobile applications using Flutter framework and Dart programming language.
• Design and implement user-friendly, responsive UI components and screens.
• Collaborate with cross-functional teams to gather and analyse requirements, and translate them into technical specifications.
• Write clean, maintainable, and efficient code following industry best practices and coding standards.
• Optimise application performance for various devices and screen sizes.
• Conduct thorough testing and debugging to identify and fix issues, ensuring high-quality deliverables.
• Integrate RESTful APIs, third-party libraries, and services to enhance application functionality.
• Stay up-to-date with the latest trends and advancements in mobile application development and Flutter framework.
• Continuously improve development processes, tools, and methodologies to enhance productivity and efficiency.
• Collaborate with designers and product managers to refine and iterate on application designs and user experiences.

Qualifications and Skills:

• Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent work experience).
• Proven experience in developing mobile applications using the Flutter framework.
• Strong proficiency in Dart programming language and object-oriented design principles.
• Solid understanding of mobile app architecture patterns (such as MVVM or Redux) and state management solutions.
• Proficiency in UI/UX design principles and the ability to create visually appealing and intuitive interfaces.
• Familiarity with RESTful APIs and integration of third-party libraries and services.
• Experience with version control systems (e.g., Git) and agile development methodologies.
• Strong problem-solving and debugging skills to identify and resolve application issues.
• Excellent communication and collaboration abilities to work effectively in a team environment.
• Self-motivated with a passion for staying updated on emerging technologies and trends in mobile app development.

Preferred Qualifications:

• Experience in developing cross-platform mobile applications for iOS and Android using Flutter.
• Knowledge of native mobile development (Swift, Kotlin) and familiarity with platform-specific APIs and features.
• Familiarity with backend technologies and server-side development (e.g., Node.js, Firebase, or GraphQL).
• Understanding of software testing methodologies and automated testing frameworks.
• Contributions to open-source projects or personal app development portfolio.

About TrueFan

TrueFan is a celebrity-fan experience platform that enables fans to connect with their favorite celebrities. The business runs on a mobile application where fans compete in an online quiz contest designed on the life of their favorite celebrity (their movies, trivia, facts, etc.) and the winners get a personalized video message from them. The idea is to provide millions of fans an opportunity to fulfill their lifelong dream of interacting with their favorite celebrity while keeping it simple, passion oriented, and engaging for them.

TrueFan is founded by ex-IIT-SRCC alumni and is backed by marquee investors including Ronnie Screwvala, Mayfield Fund, and Saama Capital.

For more details: visit https://www.truefan.in/" target="_blank">https://www.truefan.in/

Job Description

We are looking for a React 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 leading and 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.

What does the core role include?

• Leading a team of Developers to discuss user interface ideas and applications.
• Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
• Designing stateless components in React Native
• Contributing in all phases of the development lifecycle
• Working with the developers to create and maintain a robust framework to support the apps
• Working with the developers to build the interface with a focus on usability features

What else can you expect in the role?

• Prepare and produce releases of software components
• Optimizing performance for the apps
• Problem-solving skills, analytical mind, and positive attitude
• Ability to think from end users perspective and focused on improving the overall product experience.
• Deliver across the entire app life cycle concept, design, build, deploy, test, release to app stores and support

What can fetch you brownie points?

• Hands on experience with React Native is required
• Hands-on experience in React Native APIs, ReactJS, Javascript, ECMAScript (OOJS) and JSX.
• Strong understanding of JavaScript ecosystem
• Hands on experience on Android in creating Hybrid / Native applications
• Demonstrable UI/UX experience on a large-scale app.
• Thorough understanding of React Native development tools like IDEs (Nuclide, Atom, Sublime Text, or Visual
• Good knowledge of JS frameworks like ReactJS is a plus.

Desired Skills and Experience

Hybrid Apps,React Native, Native iOS and Android Architecture understanding.

Visit Us - https://www.truefan.in/" target="_blank">https://www.truefan.in/

Job Description

We are looking for a Mobile and Javascript developer who is proficient with React Native, React.js, and Typescript with 2 years of experience. The primary focus will be on developing UI components with React Native and React JS workflows with Typescript. This will include the use of automated integration tests with RTL. These components are expected to be robust and easy to maintain with the highest code quality. The coordination with the rest of the team working on different layers of the infrastructure should be effective. 

Responsibilities

• • Delivering a complete mobile application OR front-end application using React Native/React JS and Typescript.
• • Building reusable components/widgets and front-end libraries for future use.
• • Translating designs and wireframes into high-quality code.
• • Writing tested, idiomatic, and documented code.
• • Optimizing components for maximum performance across multiple web browsers.
• • Mentoring junior developers, peer-to-peer code reviews, and ensuring that high.
• • Code quality bar should be maintained. Skills
• • Excellent proficiency in React Native, JavaScript, CSS, and HTML, including DOM manipulation and the JavaScript object model.
• • Thorough understanding of React Native, React JS, Typescript, and its core principles.
• • Experience with popular React Native andReact.js workflows (such as React-Redux, React-Router, React Hooks, etc.)
• • Experience with Class components and Functional components.
• • Experience with React Testing Library (RTL). Familiarity with Enzyme, Jest Framework and Cypress.
• • Experience with data structure libraries (e.g. Immutable.js)
• Experience with Backend technology like NodeJS, AWS
• • Familiarity with the front-end development tools such as Babel, Webpack, NPM, etc.
• • Experience with code versioning tools Git and its workflows.
• • Ability to solve problems effectively.
• • Ability to learn and explore new things effectively.
• • Familiarity with RESTful APIs.
• • Ability to understand business requirements and translate them into technical requirements.
• • Professional, precise communication skills.
• • Clear understanding of design patterns especially MV*.
• Experience with AWS is a big plus

• Advise and discuss with the team on the architecture and requirements.
• Bring your experience for mobile User Experience.
• Set up actions to ensure high level of quality and satisfaction
• Build and maintain efficient and reliable code.
• Support continuous improvement by investigating alternatives and technologies.

• Bachelor’s Degree in Informatics Engineering or similar
• Minimum of 4+ years work experience in similar roles
• Strong knowledge in Front-end frameworks (React Native)
• Strong knowledge in the mobile language (swift, objective-c, java, kotlin)
• Experience in unit testing and TDD.
• Advance knowledge in using testing frameworks ( Karma, Jest, Appium, Cypress ).
• Experience with Agile Methodologies (Scrum, Kanban)
• Experience in CI/CD
• Having a coaching profile, good communication skills is crucial to ensure good exchange and sharing of information within and outside of the train
• Being able to provide based on the audience synthetic or detailed information is mandatory
• Being curious to continuously learn and being a leader in your domain of expertise
• Immediate or very low availability
• Fluent in English - written and spoken (mandatory)

Mobile Developer (Xamarin)
To assist us in building out our next generation of mobile apps using Xamarin, we’re looking for a well-rounded Mobile developer. A primary job responsibility will be to assist in developing and maintaining new features for the Xamarin application. The right person for this job will understand the agile methodology as well as thrive in a fast-paced environment.

Required Skills:

• 2+ years experience developing software using Xamarin.
•  Xamarin Form based UI development using XAML
• Strong desire to learn
• Basic understanding of design patterns
• Comfortable working with Subversion, Git, or similar source control environments
• Must be willing to do Test Driven Development.
• Strong communication skills, must embrace working in a highly-collaborative environment

Preferred Skills:

• Good understanding of web-service technologies, Restful APIs
• Some exposure to a version control system such as Git or Subversion
• Proven understanding of software development techniques, concepts and processes
• Driven and self-motivated.
• Works creatively to solve challenging problems

Responsibilities

• Assist in the design, implementation, and maintenance of features for our cross platform applications.
• Provide technical support and troubleshooting that are beyond capabilities of help desk or customer service
• Analyze and fix QA and production problems
• Ensure proper functioning of applications in a production environment
• Work collaboratively with designers, product managers and QA in meeting tight deadlines utilizing SCRUM in an agile environment.
• Unit-test code for robustness, including edge cases, usability, and general reliability.
• Defines and documents requirements for data, workflow, logical processes, and interfaces with other systems.
• Other tasks and projects as assigned by management.

React Native Developers

• l React Native
• l Redux and State Management
• l Experience with OIDC/OAUTH2
• l Git and Git Flow Processes
• l JavaScript (ES6 and ES.next)
• l Unit Testing (Jest, Jasmine or similar frameworks)
• l Server Side Programming (NodeJS, Express)
• l OpenAPI Spec