
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
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Urgent Hiring !!!
We are looking for Flutter Developer,
1+ years of experience in developing native and cross-platform mobile applications
Experience in one of the programming languages: (Java and Kotlin (Android) Swift and Objective-C (iOS))
React Native (hybrid development)
Knowledge of Flutter SDK, Getex, Provider, Android Studio and IntelliJ, Visual Studio Code,
SQLite, MySQL, and PostgreSQL databases
REST APIs
Experience with Git and Jira
Familiarity with Agile development approaches
Experience: 1 to 2 years
Location: Surat (onsite & fulltime)
Key Responsibility Areas:
- Design, build and deliver enterprise level mobile applications
- Write code with standards and conventions and follow best practices
- Encourage and lead innovation and solid lifecycle processes
- Collaborate with team on work definition, estimation and prioritization
- Lead and grow as a professional software engineer.
- Full ownership of product deliveries and mentoring junior team members.
- Strong client interactions to provide excellent Quality of Service.
- Owning the code base and making sure all code is reviewed and is of very high quality.
- Write and modify coding conventions and standards documents for all development
Required Skills:
- 2-4 years experience in developing Android applications using Java and Kotlin
Technologies/Frameworks –
- Java, Kotlin
- Maven, Git, Bitbucket
- Knowledge Data Structures
- SQLite, Room Database
- Must have strong knowledge and experience in Agile based software development methodologies. Knowledge of an Agile tool like Jira.
- Must have a very strong knowledge of integrating various system and APIs (both REST and SOAP)
- Good to have: Experience of Payment Gateway Integration, Third Party SDK integrations
- Domain Preference
- FinTech, Banking, IoT
- 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.
We are seeking extremely smart Android developers who are passionate about pushing mobile technologies to the limits.
- Design and develop products by working closely with business teams.
- Design super intuitive experiences in the next generation of our mobile applications.
- Build performant, scalable, yet secure, enterprise-ready android applications with architecture that is fast yet lean on the backend servers enabling them to support millions of users in parallel.
- Build enterprise-ready back end architectures that can support millions of users in parallel.
- Gain experience with hands-on coding and independent ownership of software components.
- Follow strong engineering best practices and champion their adoption.
Requirements
- 2+ years’ experience in android software development and delivery.
- Bachelor’s or Master’s degree in engineering from a reputed institute(preferably IITs, NITs, or other top engineering institutes).
- Strong grasp of CS fundamentals, algorithms and excellent problem-solving abilities.
- All experience should be from good product development or e-commerce background.
- Must have shown good stability in all your previous associations.
- Knowledge of UI architectural patterns like MVVM(preferable), MVC, MVP, data binding, activity & fragment lifecycle, recycler view, navigation component, layouts (constraint layout preferable), theming etc.
- Should have actively used retrofit, work managers, android jetpack, Rx java, dagger, retrofit, android sdk, GIT/bitbucket, gradle/ant and very keen on exploring other proven tech stacks.
- Comfortable with test-driven development in android with UI testing, instrumented unit testing and unit testing using junits, mockito or other tools.
- Willingness to learn and write simple backend REST API’s (preferably in Java, spring boot & hibernate) without having to completely depend on backend engineers for delivery.
- Has worked in a fast-paced agile organization building stateless and re-entrant/resumable android applications.
Create world class apps that have potential of reaching millions of users.
Roles and responsibilities include -
1. Addition of new features to existing app and making sure minimal crash rate and ANR
2. Adding new AI models built by data science team into the android environment
3. Planning new features with founders and other stakeholders
4. Creating reasonable timelines and making sure delivery according to planned schedules
Seenit’s suite of apps enables the leading retailers around the world to transform their customer experience and build loyal relationships with their customers. The apps allow retailers to make use of their physical infrastructure and resources to deliver a truly omnichannel experience in today's rapidly changing world of shopping.
We would welcome someone to the team who:
- Loves to write “clean”, well designed code to solve complex problems
- Can design, develop and test the core product software to ensure strong optimization and functionality
- Is inclined to contribute in all phases of the development lifecycle and takes end to end ownership of the project
- Is excited to support others to succeed and shine in a collaborative team culture
Your application will require you to have:
- Just some previous projects to showcase, no need for CV immediately
You should work with us because:
- We’re a relaxed diverse group and don’t take ourselves too seriously
- We're creative and want to change the world while we're at it (yes we do!)
- Our products have an international audience and our partners are around the globe
- Team lunches are more frequent than team meetings
- We love to travel and will ask you to take time off to refresh
Industry: Retail / E-commerce
Functional Area: IT Software - eCommerce, Internet Technologies
Role Category: Programming & Design
Role: Application Programmer
Employment Type: Permanent Job, Full Time
Job Description
- With 2+ years of experience of React Native experience on iOS/Android. Platforms
- Must have experience on RESTful Web-Services
- Deep familiarity with Redux and common popular React Native patterns, libraries, components, and frameworks.
- Well verse in Android and Ios framework and have atleast 2 app on playstore/Appstore.
- Mobile-first design and responsive code deeply ingrained in your thought process.
- Familiarity working with REST APIs for deep integrations with both platforms i.e. general best practices, shortcomings, trade-offs, etc.
- Have a solid understanding of CSS,Javascript and react.js.
- Must be good in problem solving, Data structures andAlgorithms.
- Must be hands on writing Unit test cases.
- Ability to work with minimal guidance in fluid environments while providing guidance/stability to junior engineers in the team.
- Strong understanding of App Architectures, E-commercesolutions
- Basic knowledge of version control system like Git / Mercurial / Bitbucket
- Writes well managed and clean codes
- Hands on experience on features specifically QR scanning, Push Notifications, Deep Linking, GPS etc. are an added advantage
- Hands on experience with 3rd party tools integration like Google Analytics, Engagement tool, Payment gateway integration is an added advantage
| Software Engineer - iOS | |
| Department: MindLabs | |
| Location: Bangalore | |
| Job Description (iOS) | |
| We are looking for an iOS developer responsible for the development and maintenance of applications aimed at a range of iOS devices including iPhone and iPad. Your primary focus will be development of iOS applications and their integration with back-end services. You will be working alongside other engineers and developers working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and the creation of quality products is essential. | |
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| Ability to understand business requirements and translate them into technical requirements | |
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| Identify and correct bottlenecks and fix bugs | |
| Help maintain code quality, organization, and automatization | |
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| Proficient with Swift and Cocoa Touch | |
| Experience with iOS frameworks such as Core Data, Core Animation, etc. | |
| Experience with offline storage, threading, and performance tuning | |
| Familiarity with RESTful APIs to connect iOS applications to back-end services | |
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| Understanding of Apple’s design principles and interface guidelines | |
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| Knowledge on AI development | |
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| Bachelor's degree in Computer Science or related field or equivalent degree |
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- Experience in IOS SWIFT Framework
- Proven experience in React Native components in native iOS and Android
- Good understanding of Android / iOS / Web design guidelines, SDK and excellent JavaScript skills.
- Knowledge of React and the Java script ecosystem
- Exposure to other hybrid mobile platforms like IONIC,Sencha, HTML5, PhoneGap, jQuery Mobile etc.
- Familiarity with RESTful APIs development.
- Expertise with code testing best practices, including unit and integration testing to ensure quality of code.
- Familiarity with code versioning tools such as Git, SVN, Github.
- Excellent verbal and written communication skills
Preferred Skills & Knowledge: IOS Development (Swift), React Native










