React Native Developer
at Online trading platform well funded and rapidly growing
React Native
Android Development
iOS App DevelopmentOur client's Mobile app has been downloaded by more than 15 million users. Daily, more
than a million users login to the application. As a fast growing company, we are
preparing for a future of tremendous growth and disruption in finance. We are looking
for a React Native developer (SDE2) interested in building performant mobile apps on
both the iOS and Android platforms. The incumbent will be responsible for architecting
and building the 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.
● 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.
● Participating in SDLC processes streamlining, POC development, Functional
Estimation, Performance Tuning, Environments setup, etc.
● Adherence and promoting best development practices that ensure high
quality
● Ability mentor junior developers and actively contribute to code reviews and
improve the code base for scale and maintainability
● Hands-on experience in Android/iOS app development via React-Native
● Experience in Build systems and Deployment processes
● Experience in writing unit testing code with libraries like Jest, Enzyme , Jasmine, Mocha, etc.
● Excellent problem solving, debugging, and troubleshooting skills.
● An avid follower of the best practices, optimization strategies, and design patterns
● Knowledge of RN available inbuilt UI components and the props those UI components accept.
● Good knowledge of monitoring and tracking down app crashes and bugs using advanced tools
● Experience in profiling tools in Xcode and Android Studio
● Experience in 3rd party services integration
● Knowledge of architectures, trends and emerging technologies
Shubham Vishwakarma
Full Stack Developer - Averlon
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Swift
KotlinPosition: 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.
Swift
Objective CiOS App DevelopmentResponsible for
- Designing and coding the base application
- Ensuring the quality of the application
- Fixing application bugs
- Maintaining the code
- Implementing application updates
Android DevelopmentKotlinpoint on the app. It is an app built in India, for Indians, to share their thoughts and opinions on any topic in their
mother tongue using Audio / Video / Text. Koo gives a stage for Indians to voice their thoughts and enables the “Best
of India” to share their thoughts with the “Rest of India”. Koo provides a personalised feed to users by letting people
select the people they want to follow. The user is then shown content from these people. Some of the top minds of
India are invited on our client to share their thoughts and opinions on various topics. Users can follow such personalities
and follow what they are talking about, and share their opinions too.
Koo boasts of some of the most prominent faces in India that comprise of Union Ministers, Chief Ministers of States,
Actors, Actresses, Celebrities, Sports Personalities, Top Bureaucrats, Journalists and Editors among others from
1000s of professions.
applications with desire to work in growing fast paced startups.
2. Worked on applications from scratch. Well versed with building apps for various screen density and sizes.
3. Up to date on upcoming trends in android and its ecosystem with respect to design, architecture etc.
4. Experience on optimising all important parameters like network utilization, application size and battery.
5. Experience with kotlin, coroutines, dagger, retrofit, rx-android and android architecture components etc.
6. Should have used mock frameworks, modular code design and popular design patterns.
applications with desire to work in growing fast paced startups.
2. Worked on applications from scratch. Well versed with building apps for various screen density and sizes.
3. Up to date on upcoming trends in android and its ecosystem with respect to design, architecture etc.
4. Experience on optimising all important parameters like network utilization, application size and battery.
5. Experience with kotlin, coroutines, dagger, retrofit, rx-android and android architecture components etc.
6. Should have used mock frameworks, modular code design and popular design patterns.
FlutterReact NativeRole: As a part of the Engineering team, you will be responsible for driving the mobile App development end-to-end. In this role, you will be working to find creative solutions that improve our customer’s experience and brand reputation when facing technical issues on the platform. You will be responsible for tracing and monitoring real-time transactions through various systems end-to-end, displaying key information, and provided with controls necessary to mitigate incidents.
- Minimum 4-5 years experience in developing mobile applications
- Excellent understanding of software design and object-oriented programming principles.
- Minimum experience of 1.5 years on Flutter,
- Good knowledge about clean code architecture.
- Knowledge on writing Unit test cases
- Hand-on experience in widget building, its lifecycle, and inbuilt widgets provided by flutter.
- Hands-on experience in API integration in flutter.
- Hands-on experience with local storage, shared preferences, session management.
- Knowledge of Flutter performance and optimization
- Knowledge about architectural differences between ios/android and how flutter handles them.
- Good to have knowledge on Financial domain
- Good to have experience in financial industry/Fintech
- expirience on doing android release
JavaKotlinAndroid DevelopmentiOS App DevelopmentReact NativeAndroid DevelopmentKotlinJavaOwn Android SDKs, working hand-in-hand with the founding team
Design and build delightful user interfaces for native apps on Android
You will be (co-) responsible for our software development kit (SDK) for Android
Building mobile apps in both Swift and Kotlin.
You work independently on your own code, but you also spend time collaborating with others.
You are involved in all stages of app development and contribute to the roadmap.
You get the freedom to experiment with new Android technology.
Ownership — advocate for projects and solutions that need to be launched ground up.
Experience
Min 2 to 4 years in developing Android applications in Java / Kotlin / C++ /Gradle/Groovy.
Worked on SDKs/Frameworks.
Strong understanding of software design patterns as well as Android specifics.
Experience with authenticated sessions using authentication tokens and have at-least
fundamental knowledge of app security.
Good to have:-
Experience with Cross-platform frameworks is a plus (React Native, Flutter, Cordova,
Xamarin).
Have implemented security standards and guides.
Experience building applications at scale.
Experience with third-party libraries and APIs like Mobile Vision, MLKit and/or
Camera API.
Good understanding of garbage collection, design patterns and continuously
discover, evaluate,and implement new technologies to maximize development efficiency.
Unit-test code for robustness, including edge cases, usability, and general
reliability
React Native● Experience Level: Min 2+ years
● JavaScript/Typescript and React Native.
● Experience using technologies like React Native, Redux/MobX/Saga, TypeScript, modern
CSS frameworks and webpack.
● Familiarity with native build tools, like XCode, Gradle {Android Studio, IntelliJ}
● RESTful API’s, basic HTTP knowledge, GET/POST.
● Good Communication Skills
JavaKotlinAndroid DevelopmentWIOM will be providing Unlimited High-Speed Internet to 50 million households in the next 7 years. Using its unique Shared Economy approach and an UBER kind of model, WIOM is India’s 1st PDOA under the new PM-WANI scheme. It enables unlimited Internet to people for as low as INR 5 per day. Backed by IIT Delhi and marquee investors, Wiom has a stellar founding team with IIT/ IIM pedigree.
Why should you consider WIOM?
If you want to retire in the next 5 years and create value and impact worth 25 years of hard work, then WIOM is the place. In the next 5 years, we will be creating 1000X growth and a USD 8B dollar enterprise. By joining the team at this stage (we are less than 30 members today), you are taking a ticket to an exclusive Millionaire club that would have impacted the lives of 500 million people. You get an opportunity to work with the sharpest minds in the country along with a fast-paced environment which will bring out the best in you.
What will you be doing?
We are looking for an android developer who will be responsible for the development and maintenance of applications aimed at a vast number of diverse Android devices. Your primary focus will be the development of Android applications and their integration with back-end services. You will be working along-side other engineers and developers working on different layers of the infrastructure. Therefore, commitment to collaborative problem solving, sophisticated design, and creating quality products is essential.
• Translate designs and wireframes into high-quality code
• Design, build, maintain high performance, reusable, and reliable Java code
• Ensure the best possible performance, quality, and responsiveness of the application
• Identify and correct bottlenecks and fix bugs
• Continuously work on improving application performance
What can make you a great fit for this role?
• Excellent Analytical and coding skills
• Strong OO design and hands-on programming skills in Android and java
• Experience of building reactive web applications for mobile using react.js/ vue.js or angular.js
• Android and native apps and SDK development experience
• Work experience with social media and other third-party APIs like payment gateway and third-party libraries
• Worked on the mobile database, good with data structures and algorithms
• Knowledge in Google, Firebase API
React Native
React.jsFamiliarity with cordova and reactjs.
Android DevelopmentJavaKotlin
Follow CutshortShubham Vishwakarma
Full Stack Developer - Averlon