iOS 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.

Job Functions / Responsibilities:              

• Collaborate with product managers, designers, and other developers to define and implement new features for our iOS mobile applications.
• Write clean, maintainable, and efficient code using React Native and JavaScript, ensuring the best possible performance and user experience.
• Troubleshoot and debug issues in the application to maintain its stability and reliability.
• Optimize mobile applications for performance and responsiveness.
• Stay updated with the latest industry trends and technologies to improve the mobile application continuously.
• Participate in code reviews to maintain code quality and provide constructive feedback to team members.
• Work closely with QA teams to ensure rigorous testing of the application.
• Provide technical guidance and mentorship to junior developers when necessary.

Skills:

·        4-6 years of professional experience in mobile application development.

·        Strong proficiency in React Native and JavaScript.

·        Extensive experience with iOS development, including Swift and Objective-C.

·        Knowledge of native iOS libraries and frameworks. Experience with third-party libraries and APIs.

·        Familiarity with RESTful APIs and integration.

·        Solid understanding of mobile app design principles and user interface guidelines.

·        You can work independently on solving complex problems and troubleshooting cryptic

bugs

·        Fluent in both spoken and written English

·        You're a team player and pragmatic programmer.

·        Proven ability to work in a fast-paced, collaborative environment.

·        Strong attention to detail and a commitment to delivering high-quality code.

·        Knowledge of Redux or similar state management libraries.

·        You're an avid clean coder, and refactoring is part of your normal workflow. 

• You need to be excited about the problem that we are trying to solve
• 4+ years of experience building applications in Native iOS (Swift)
• Build pixel-perfect, buttery smooth UIs.
• Strong Js fundamentals - You should be able to contribute partially to our existing React Native development as well
• Ability to give clarity and communicate well with the team, including Product, Backend and Dev-Ops (if and when needed)
• Ability to use profiling tools well, getting to root causes of bugs fast
• Ability to pick and work on adjacent technologies if and when required (Eg: If the best performance monitoring solution needs a basic firebase setup, that should not be a blocker for you to go ahead and do so)
• Maintain code and write automated tests to ensure the product is of the highest quality.
• Reach out to the open-source community to encourage and help implement mission-critical software fixes
• You need to be comfortable working in a remote environment (Good internet connection and availability on phone is needed)
• Deep understanding of iOS architecture
• Understanding of inter app communication
• System design thinking
  
  

• Experience with React Native or similar Hybrid Frameworks
• Exposure to Objective C
• Experience in Test Driven Development
• Ability to tell Product what creates better User Experience, ability to tell backend what API responses will help the user get a faster load time
• Inquisitiveness to understand the system as a whole, and not only be stuck to your domain of expertise (Eg: Asking questions like why does this particular response take so much time as compared to others, and brainstorming with the backend engineer on how to improve on it)

• Competitive Salary
• Health insurance for you and your family
• Work timings - You are the master of your time. However, with great freedom comes great responsibility. If you have committed something to the team, we expect that you will give it your best to make sure that commitment is done and is done on time
• Leave policy - Take a leave whenever for whatever reason you want. No questions asked!
• Work remotely

• Design and build advanced applications for the iOS platform

• Experience is required in IOS

• Collaborate with cross-functional teams to define, design, and ship new features.

• Unit-test code for robustness, including edge cases, usability, and general reliability.

• Work on bug fixing and improving application performance.

• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.

• Working experience in iOS development using Swift, RX Swift,

• Have published one or more iOS apps in the app store

• A deep familiarity with Objective-C and Cocoa Touch

• Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and Core Text

• 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

• working experience on Media streaming

• Working experience on Modular programming, RX Swift, Auto layout, Push Notification & Deep Linking.

Roles & Responsibilities: 2-3 years of Experience developing mobile apps.  Have an Experience indeveloping nativeAndroid apps(depth knowledgeof Android SDK, NDK)  Depth knowledgeof SQLite andRoom  Excellentin JAVA, Kotlin language with agooddebugging Skills  Expertin usingAndroid StudioandGit .  Developing universalapplication, which can run on most available androiddevices.  Must have good understanding ofObject-OrientedProgramming  Good eye formobileapp designand productsense  Experience in cross platformToolslike Appcelerator  Internallymotivated, abletowork proficiently both independently and in a team environment.  Good communication skills with both internal teammembers and external business stakeholders  Strong initiativeto find ways to improve solutions,systems, and processes.  Experience ofworking onAndroid Studio.  Good in data structure and Algorithms.  Very Sound knowledge of Android Components.

Candidate Required: • Excellentcommunication skills • ProficientinmobileappUI development and bestpractices • Ability to understand that business needsmay shift yourpriorities and adjustaccordingly • Exceptionalwritten and oral communicationskills. • Exceptional interpersonalskills, with a focus on listening and questioningskills. • Proven analytical and problem-solving abilities. • Ability to effectively prioritizeand execute tasksin ahigh-pressure environment

Job Description:

We are looking for an Android developer who possesses a passion for pushing mobile technologies to the limits. This Android app developer will work with our team of talented engineers to design and build the next generation of our mobile application, Android programming works closely with other app development and technical teams.

Join our company if you are willing to work with us and need to learn good technology and healthy work culture.

If you have the desire to be a part of an exciting, challenging and rapidly-growing software development company, and if you are passionate about software development and creating the finest apps in the marketplace.

Freshers with an attitude to learning are welcome to apply.

Roles & responsibilities

Development and maintenance of Android applications

Monitoring app performance and taking necessary steps to fix the bugs in the applications

Documenting version history and changelog for mobile applications

Doing research and coming up with new ideas for app development

Requirements:

• Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes.
• Familiarity with Restful APIs to connect Android applications to back-end services.
• Strong knowledge of Android UI design principles, patterns, and best practices.
• Experience with offline storage, threading, and performance tuning.
• Ability to design applications around natural user interfaces, such as touch.
• Knowledge of the open-source Android ecosystem and the libraries available for common tasks.
• Ability to understand business requirements and translate them into technical requirements.
• Familiarity with cloud message APIs and push notifications.
• A knack for benchmarking and optimization.
• Understanding of Google's Android design principles and interface guidelines.
• Proficient understanding of code versioning tools.
• Must know about java, Kotlin, MVC, MVVM, Firebase, SQLite, and payment gateways.

• Apply knowledge of Javascript (ES6) including all the latest features
• Usage of third party libraries for Maps, UI scaling, Styles, Secure storage, Permissions, Navigation, Splash screen, Network. Analytics. Push notifications, Localization, Calendar, etc.
• Build and run apps using Xcode, and Android Studio
• Persistence support using frameworks like Realm
• Comprehend performance issues and solve them
• Knowledge of Git (including merging, branching and resolving merge conflicts)

• Ability to create flexbox driven UI layout
• Configuring ESLint for JS code linting
• Being aware of alternate state management mechanisms like MobX
• Is proficient in either iOS or Android programming too.

• Knowledge of all aspects of React framework
• Components, containers, JSX specification of component UI layout, Component lifecycle
• Props and State mechanism used for data flow
• Various kinds of views (text, button, scroll view, flat list, etc.)
• Navigation
• RN animations and gesture system fundamentals
• Redux state management library
• React Router usage
• JSON/XML parsing

Experience- 1 to 5 Yrs

• Design and build advanced app features for the iOS platform
• Collaborate with cross-functional teams to define, design, and ship new features
• Unit-test code for robustness, including edge cases, usability, and general reliability
• Must be able to deal with complexity. Should know about the complexities of Enterprise
  Mobility, Blockchain, IoT
• Work on bug fixing and improving application performance
• Continuously discover, evaluate, and implement new technologies to maximize development
  efficiency