
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
About
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Skills:
Core JAVA(Native), Core Kotlin, Sqlite, MySQL, XML
Developed Android Application
Use of Kotlin and Java
Knowledge of Core java and Core Kotlin must
Requirement: -
- Managing a team of 3-4 engineers
- Hands on experience in Web applications and Mobile applications.
- 2+ years of professional experience working with React Native.
- 4+ years of professional software development experience.
- Should have experience in React.js as well
- Experience working with Swift, Objective C, and Java a plus.
- Meaningful experience working on large, complex systems.
- Familiar with Agile development methodology
- Should have strong fundamentals in React Native
- Should be good at Languages React Native, iOS, Android mobile
- Should be well versed with mobile application architecture
- Ensure and apprise stakeholders of technical feasibility, effort, and impact of implementations.
- Interact with clients to understand requirements.
- Able to convert business requirements to sizable tasks for developers to implement.
About Us
We enable humans & machines with internet connectivity at a price that they can afford.
The inspiration for Wifi Dabba came from the founders working together for the last decade in the mobile application industry and realising the biggest reason for user churn being access to cheap and affordable internet access. From having worked on ground onboarding users and facing poor connectivity issues all the time, we took it on ourselves to fix the internet access problem for the common citizen.
At Wifi Dabba (YC W17), we are building a low cost, scalable & distributed Wi-Fi infrastructure to connect next billion users online. We do this by deploying a grid of lasers (Free Space Optics) over the cities & town and bring cheap and fast internet for everyone. We enable anyone to buy 1 gig of data access at a time at a price they can afford. Sachetization of internet access is the foundation to rebuilding internet for all. We do this by leveraging crypto and blockchain to truly make internet infrastructure ownership distributed — our vision is to be connectivity layer for the Web3 world.
Why work with us?
- You will get the chance to be an early team member at a fast-growth YC startup.
- You get to define the future of telecom infrastructure ownership and operations.
- We’re a tight-knit team where you'll learn a ton and have ownership.
- Opportunity to build for the next billion users.
Requirements
- Strong engineering background preferably in Computer Science
- Experience architecting, developing, and testing android application code end-to-end
- Strong knowledge of Android UI design principles, patterns, and best practices
- Experience with AWS services
- Experience working with remote data via REST and JSON
- Experience working with mobile analytics
- Knowledge of code versioning tools like GIT, SVN.
- Experience in building user interfaces for mobile apps.
- Participate in design discussions with business users, web producers and engineering teams.
- Perform requirements analysis, high-level design, effort estimation for new business requirements and feature enhancements.
- Write clean, concise, and sustainable code.
- Team player who enjoys collaborative effort.
Bonus points
- Entrepreneurial mindset (we encourage all employees to be future founders and this can be a great stepping stone towards that)
- Customer-centric and passionate about working in a small & focused team
- Previous experience building/working in telecom software or infrastructure
- Previous experience building web3 project - DeFi / Blockchain infrastructure
- Previous experience at a high-growth, fast-paced startup
• Develop compelling mobile application functionality on high-traffic mobile apps and RESTful services.
• Participate in architecture and design of mobile applications and services with developer mentors.
• Ensure cross-platform application compatibility with dominant mobile platforms and versions.
• Apply strong analytical and development skills to troubleshoot and performance tune mobile apps and services.
• Create and update automated unit and acceptance tests to ensure software quality.
• Work closely on an agile team in a collaborative environment.
• Readily able to monitor environments and troubleshoot unforeseen problems.
Skills:
• Advanced understanding of React
• Typescript/ES6 JavaScript
• Experience with React Native strongly preferred
• Understanding of Redux and Redux-Saga
• Good technical skills & SOLID design principles (e.g., design patterns)
• Excellent oral and written communication skills in English.
We are looking for talented front-end developers who can help us in enabling our customers deliver excellent experiences to end users. As a customer experience management firm , we are constantly enhancing user experiences in several of our customers' online platforms. The role of a front-end developer in our teams is crucial in realizing our design solutions without any loss in translation. We are looking for developers who can contribute in building the best in class digital experiences through the right use of frameworks , technologies and code.
Key Skills:
2+ years of professional Mobile Development experience Core strength with React or React Native Experience with Typescript, Redux, Node.JS is desired Proficiency with Native iOS or Android App Development (both would be a major plus) Knowledge of App deployment processes through Apple App Store or Google Play Store A working understanding and experience of Test-Driven Development and CI/CD best practices Ability to use a wide variety of open-source technologies and cloud services (experience with AWS is a plus)
About Moonraft Innovation Labs
We are here to advance human experience through design-driven innovation. Design, to us, is all
about creating new meanings, while art is about self expression and emotive appeal. Bringing these
two creative disciplines together and operating at their intersection with business and technology, we
drive business innovations with differentiating customer experience.
We place the human at the center, bringing quantitative and qualitative techniques together to
develop consumer insights. Our techno-creative team, bridging consumer insights, business
understanding and advanced technology skills, then builds humanistic technology solutions.
We believe experimentation is at the core of every innovation. Radical innovation, in our view, is
just an event recognized in hindsight when a number of trial-and-error attempts spark off a
breakthrough. Our approach embraces rapid prototyping and empirical evidence in everything we
do. As the name says, we are Moonraft Innovation Labs, driving innovation through
experimentation.
"Rafters", who inhabit Moonraft, recognize only idea as the boss. They live by imagination,
simplicity and speed. Our egalitarian culture and environment are designed for rafters to thrive and
deliver elegant solutions for complex problems.
Android
- Strong understanding of the OOPS concept.
- Working experience in Java and Kotlin language. (Must)
- Knowledge of Offline Sync, Multithreading, Realm/Room/SQLLite databases, Live data, Socket Programming. (Must)
- Familiar with Android Jetpack components (Must)
- Idea/Experience of MVC/MVVM and MVP
- At least 1 live application on Playstore. (Must)
- Good debugging and problem-solving skills.
Good to have
- Idea/experience in RxJava, RxKotlin
- Idea/experience of unit and instrumentation testing in Android
- Knowledge of Web RTC.
- Experience with tools like Git, Jira, Basecamp, BitBucket, Azure DevOps would be an advantage.
- Good to have experience working with IOT projects, Bluetooth technologies
- Active Open Source, GitHub or Stack Overflow contribution will be a big plus
- Having personal apps in play store will be an added advantage
- Working knowledge of the general mobile landscape, architectures, trends & emerging technologies.
What we look for in people
critical thinking, openness to unlearn and learn, collaborate seamlessly cross borders, enjoy working in a remote and fast paced environment, curious and passionate about solving customer problems, consensus driven decision making approach, persuasive communication and precision for details
Remuneration: Rs. 8-11 LPA. Not a constraint for the right candidate.
We are looking for an iOS developer who will take a key role on our team. Our iOS developer will be responsible for the development of mobile applications for iOS devices.
- You'll be working alongside other engineers and developers, collaborating on the various layers of the infrastructure for our (platform/application/etc.)
iOS Developer Skills and Expertise (Below is a list of several skills and responsibilities of iOS developers. Remember to remove any that do not fit your specific role) :
- Design and build applications for Apple devices on the iOS platform.
- Maintain quality and ensure responsiveness of applications.
- Collaborate with the rest of the engineering team to design and launch new features.
- Maintain code integrity and organization.
- Be proficient with Objective-C or Swift (depending on project requirements), and Cocoa Touch.
- Experience with iOS frameworks such as Core Data, Core Animation, as well as offline storage, threading, and performance tuning
- Must be familiar with RESTful APIs to connect iOS applications to back-end services
- Experience with performance and memory tuning with tools (such as Instruments and Shark, depending on project needs)
- Experience with cloud message APIs and usage of push notifications.
- Knowledge of code versioning tools (such as Git, Mercurial or SVN).
- 3-5 years of experience in Native Android App development (Preferably for a B2C Product)
- Proficiency in various algorithms and data structures.
- Familiar with Kotlin/Java language, and experience with Object-Oriented Design.
- Strong experience with REST APIs, storage databases, Multi-threading, performance and memory tuning.
- Good knowledge of architectural patterns such as MVP and MVVM.








