React Native Developer

Position Title:

SDE Intern – Mobile Application

Location: Bangalore

Duration: 6 months (with potential for full-time conversion based on performance)

About PGAGI:

At PGAGI, we believe in a future where AI and human intelligence coexist in harmony, creating a world that is smarter, faster, and better. We are not just building AI; we are shaping a future where AI is a fundamental and positive force for businesses, societies, and the planet.

Key Responsibilities:

• Develop and maintain cross-platform mobile applications using Flutter or React Native.

• Collaborate with UI/UX designers and backend developers to deliver seamless app experiences.

• Integrate RESTful APIs and work with JSON data parsing, asynchronous programming, and real-time data handling.

• Participate in regular code reviews and follow best practices in mobile development.

• Debug and troubleshoot issues, optimize app performance, and write unit tests.

• Learn and apply Git-based version control, task tracking, and agile workflows.

⸻Required Skills & Knowledge :Programming & Frameworks:

• Proficiency in Dart (Flutter) or JavaScript/TypeScript (React Native).

• Good understanding of OOP and functional programming principles.

• Experience with:

• Flutter: Widgets, navigation, state management (Provider, Bloc, etc.)

• OR React Native: Components, Redux, Context AP

IComputer Science Fundamentals:

• Basic understanding of data structures (arrays, stacks, queues, hash tables).

• Knowledge of basic algorithms (sorting, searching).

• Awareness of time complexity and code efficiency.

• Solid grasp of programming concepts like variables, loops, conditionals.

Mobile Development Concepts:

• Experience in building and deploying cross-platform mobile apps.

• Understanding of responsive design, Material Design, and iOS Human Interface Guidelines.

• Familiarity with asynchronous operations (async/await, Promises) and REST API integrations.

Networking & APIs:

• Basic knowledge of HTTP/HTTPS, request methods, and status codes.

• Hands-on experience using Postman or similar tools for API testing.

• Understanding of API security, including authentication and SSL basics.

Tools & Technologies:

• Familiarity with Git (GitHub, GitLab, Bitbucket).

• Experience using IDEs like Android Studio, VS Code, or Xcode.

• Awareness of unit testing frameworks (e.g., Flutter test, Jest).

• Understanding of build tools such as Gradle or Metro bundler.⸻

Preferred Qualifications:

• Pursuing or recently completed a B.E./B.Tech in Computer Science, IT, or related fields.

• Portfolio of previous mobile app projects (GitHub/Play Store link preferred).

• Willingness to learn, experiment, and work in a collaborative environment.

⸻What We Offer:

• Opportunity to work on real-world projects with direct mentorship from industry experts.

• Certificate of Internship and potential PPO (Pre-Placement Offer) based on performance.

• Exposure to modern product development practices and cross-functional team collaboration.

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.

The Impact you will create in the Job:

• Developing SDKs on native Android with support for cross-platform technologies like ReactNative, Flutter along with hybrid development over platforms like Cordova. 
• Apply data structures and algorithms to optimize the code for a lower memory, battery, and processing footprint - all with the goal to build plug-and-play SDKs that don’t expect the app developers to write any supporting code in the app.
• As an individual contributor, you will tackle some of our broadest technical challenges that requires deep technical knowledge, hands-on software development and seamless collaboration with all functions.
• You will envision and develop features that are highly reliable and fault tolerant to deliver a superior customer experience.
• You will get an opportunity to work with some of the best talent while learning from various highly-functional teams in the company.
• Plan and execute the roadmap with the engineering team to build and deliver next-generation systems.
• You will also collaborate with cross-functional teams to meet deliverables throughout the software development lifecycle and continuously identify areas of improvement.
• Identify and improvise areas of improvement through data insights and research.

What we look for?

• Bachelor’s/Master’s degree in Computer Science/IT from premier institute.
• 2-4 years of industry experience in Native Android development, with at least one live app on Google Play Store. 
• Good knowledge of Kotlin and/or Java with an understanding of Android Native SDK, specifically network classes, concurrency handling, databases, and background processes. 
• Strong knowledge of data structures and algorithms. 
• Solid understanding of Android Libraries related to UI, network, background services, and database.
• Familiarity with developing UI with both XML layouts and code. 
• Good understanding of SDK integrations, debugging, and troubleshooting. 
• Interest in exploring mobile app development ecosystems like React Native, Cordova and Flutter. 
• Comfortable with tackling ambiguous problems and unblocking yourself.
• Fair understanding of Push Notification ecosystem.

• A minimum of 3yrs of coding as an iOS Developer.
• In-depth experience with Swift and Xcode.
• Up to date with the latest Cocoa and iOS trends.
• Understanding of UI Kit, Core Animation, Interactions, GCD & Networking.
• Excellent understanding of design patterns & Object Oriented Programming.
• Understanding of analytics, remote reporting and measurements.
• Experience of working with Continuous Integration (CI) and Unit Testing on iOS.
• Experience with API’s and core data.
• Excellent debugging skills.
• Experience working with Git.
• Knowledge of socket based networking desirable.
• Understanding of the iOS ecosystem (APNs, Code signing, iTunes Connect, TestFlight).

Responsibilities:
1. Understanding the scope of work
2. Working with the design, programming & testing team on project estimates & timelines
3. Coordinate with team to build assets to be used within the mobile application
4. Build Application static flows using React Native with Redux
5. Integrate JSON web services
6. Working with the tester to fix bugs reported by the testers
7. Building and deploying the application to the app store

Requirements:
1. Understanding of the Mobile Application Development lifecycle
2. Hands-on experience with React Native
3. Experience with Redux or Flux or MobX
4. Understanding of Advanced JavaScript – ES6
5. Understanding of Flexbox
7. Understanding of iOS/Android module integration
8. Deploying iOS and Android apps on Apple Appstore and Android Play Store.
9. Ability to work in an Agile environment

Xfinito is building a portfolio in new product innovation, product contribution and infrastructure goals while providing individuals and teams the freedom to emphasize specific types of work.

Our work focuses on real –world problems that span the breadth of biomedical engineering, embedded systems, computer science, such as machine and deep learning, data mining, natural language processing, hardware and software performance analysis and much more.

JOB ROLE: MOBILE APP DEVELOPER

Roles And Responsibilities:

• Support the entire application lifecycle (concept, design, test, release and support)
• Produce fully functional mobile applications writing clean code
• Gather specific requirements and suggest solutions
• Write unit and UI/UX tests to identify malfunctions
• Troubleshoot and debug to optimize performance
• Design interfaces to improve user experience
• Liaise with Product development team to plan new features
• Ensure new and legacy applications meet quality standards
• Research and suggest new mobile products, applications and protocols
• Stay up-to-date with new technology trends.

REQUIREMENTS:

• Demonstrable portfolio of released applications on the App store or the Android, IOS and hybrid market
• In-depth knowledge of at least one programming language like Swift and Java
• Experience with third-party libraries and APIs
• Familiarity with OOP design principles
• Excellent analytical skills with a good problem-solving attitude
• Ability to perform in a team environment

EXPERIENCE:

We as a team are looking for freshers or young professionals with (0-4 years of experience) passion and eagerness for learning, writing and shipping code with excellent interpersonal and communication skills.