Responsibilities
- Build pixel-perfect, buttery smooth UIs across both mobile platforms.
- 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.
- Transition existing React web apps to React Native.

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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.
Must-haves:
- You need to be excited about the problem that we are trying to solve
- 4+ years of experience building applications in React Native
- Build pixel-perfect, buttery smooth UIs across both mobile platforms.
- Strong Js fundamentals
- Built an iOS app from scratch or Native Android development experience
- 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—React Native moves fast and often breaks things.
-
You need to be comfortable working in a remote environment (Good internet connection and availability on phone is required)
Good to have:
- Experience with next.js
- 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)
Benefits
- 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. You don't need to explain yourself to us
- Health insurance for you and your family
Key Responsibilities
The Mobile Lead Developer with a minimum of 3-6 years of experience to develop a React Native Mobile App
Job Overview
The primary role of this position will be to develop rich Mobile/Web applications for a new Reillo product.
Primary Skills
· Experience with popular application development frameworks such as React Native with excellent JavaScript, Typescript, ES6 or greater, HTML5, and CSS development skills
· Experience in iOS and Android Application development
· Experience with modern front-end build pipelines and tools such as Webpack
· Solid understanding of MVC, stateless APIs, Redux and building RESTful APIs
· Experience on tools like Jest or React Testing Libraries
· Familiarity with code versioning tools such as Git
· Ability to communicate effectively and make effective presentations
· Experience with ReactJS for Web App development will be an added advantage.
- Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes
- Kotlin, Java
- Important libraries include Dagger, RxJava, Realm
- MVVM Clean Architecture
- 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
- 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, such as Git
Udrive is the largest car sharing platform in the Middle East. We pioneered the concept in the region and have continued to provide the best experience amongst our peers. We are in rapid expansion and are looking for a bright, successful and determined individual who has the experience to take the companies vision forwards into the next 5 years.
Our next 5 years journey not only includes regional and global aspirations; we are building the next generation of mobility services to change the way people use vehicles
We are looking for a React Native Engineer for our Mobile App. The Mobile App team is responsible for the mobile app used by our B2C users to register as well as complete their journey with Udrive cars initiation to end.
Your responsibilities:
You will be part of our new mobile team which is part of our customer journey domain and you will work together with a cross-functional team
You strive to offer the best possible experience for our customers on mobile devices
You contribute to the implementation of business requirements as well as to architectural decisions
You ensure that your code is well tested, architected, meets our coding standards, and has proper logging, monitoring, and alerting
Your goal is to provide always-accessible information in the most convenient way, to have better engagement and an overall outstanding user experience
Your profile:
You have experience building high-performance mobile React Native applications on both iOS and Android platforms
Ability to translate Figma based designs to mobile interactions with pixel perfections
You show excellent knowledge of JavaScript and its nuances, including TypeScript.
You have experience with building real-time analytics solutions and streaming platforms
You are familiar with native build tools, like XCode, Gradle and store submission processes
It is great if you have an understanding of REST APIs, the document request model, and offline storage
The most important one: Willingness to learn. We are constantly learning new things and we enjoy it a lot. We don't expect to find people experienced in all of them. If you are excited about our tech-stack and you think you are a fast learner, do not hesitate to apply!
• Strong understanding of Flutter. Experience with other frameworks like React Native,
SwiftUI, Jetpack Compose is acceptable.
• Good knowledge of Rendering engines in Flutter, Browser, iOS, Android
• Experience in CMS such as Sanity, AEM
• Good understanding of RESTful APIs, GraphQL and Web Sockets
• Ability to debug and profile Web/Mobile applications with Chrome DevTools or Native
profilers
• Deep understanding of Reactive programming with libraries like MobX, BloC
• Exposure to SOLID Domain Driven Design, principles
• Exposure to Style Guides, Atomic Design, Design Systems
• Strong visual acumen to detect cosmetic defects ensuring
• Exposure to Design tools like Sketch, Figma, Adobe Creative Suite or Affinity Designer
• Deep knowledge of at least 2 different programming languages from JavaScript, Dart, Ruby,
Python, Go, Rust, Typescript, C#, Kotlin, Java, Haskell, OCaml
• Exceptional verbal and written communication
• A mindset to constantly learn new things and challenge the Status Quo.
Experience
• 8 - 15 years of experience building Front End Applications on different technologies
• At least 5 years of experience building React and/or Mobile Applications
• Preferably worked in the Finance/Retail domain or other similar domains with complex
business requirements.
Education
• Bachelors in Computer Science or equivalent education covering Math, Algorithms, Data
Structures, Networking, Databases, Operating Systems, Graphics
• Nice to have a Post-Graduate degree in Computer Science
Demonstrable Passion
• Contributed to one or more Open Source projects
• Actively maintain one or more Open Source projects
• Blogging on Frontend or related topics
• Authored books, videos on Frontend or other topics
• Speaking engagements at Meetups or Conferences
Placement is in-house work for the company responsible for Development and Integrationofmobileapplication Solution to Industries and professional Industrial programs. Roleplayand SMART contributions are most important in the company in relation to the client’srequirementsanalysis and improving processes. Knowledge & Experience
Bachelors Degree in Computer Science / Engineering
3.5~ 8 Year of Experience
Fluency in English is a must, and Kannada, Hindi, Telugu is an additional advantage
Overall Mobile development exp. is Must
React Native Experience of 2+ years
Strong knowledge of React workflows (such as Redux) Android Application development
GIT
Strong knowledge of REST based APIs
Should be well verse with Mobile Application Architecture.
Should have good understanding of Software Design and implementation.
Good understanding of Agile Methodologies & tools like JIRA. Attitude
Self-Starter and Go-Getter
Learning, Unlearn and Relearn
Participative
Giving and taking Feedback
Good to Have:
Ability to create and maintain continuous integration and delivery of React Nativeapplications.
Experience with automated testing suites, like Jest or Mocha
Good Command on JavaScript Coding and ES6 Standards.
Good to have iOS Application development
The ability to diagnose and fix bugs and performance bottlenecks
We’re currently looking for rockstar developers to help us build a next-gen social audio community engagement platform. Avalon is hiring for both backend & frontend engineering roles. Our tech stack is majorly Ruby on Rails & React Native.
If you were looking for a rocket-ship, this is it!
As a junior front-end developer our primary requirement is that you are proficient in React Native.
Apart from that the job entails:
- Building new features (while squashing bugs) for our growing mobile app to extend device support especially across the Android ecosystem
- Architect elegant and maintainable code with support from the team
- Collaborate with design, data, and other teams to build beautiful interfaces that look great and run smoothly
- Guide and improve the technical direction of mobile, bolstering the technical foundational, improving performance, and re-architecting
Responsibilities
- Build pixel-perfect UIs across both mobile platforms.
- Leverage native APIs for deep integrations with both platforms.
- Diagnose and fix bugs and performance bottlenecks for performance that feels native.
- Maintain code and write automated tests to ensure the product is of the highest quality.
- 1- 3 years as a professional software developer.
- Experience with React, React Native and Redux
- Experience with at least one native mobile platform (bonus points if you moved to React Native from iOS or Android development).
- Firm grasp of the JavaScript language and its nuances, including ES6+ syntax. Knowledge in TypeScript is a plus point.
- Knowledge of functional and object-oriented programming.
- Familiarity with native build tools, like Xcode & Android Studio.
- Understanding of REST APIs, the document request model, and offline storage.
We are looking for passionate professionals who are crazy about breaking the norms and make people take notice. You should be obsessively result oriented, willing to take informed risks and learn fast from your mistakes. You’ll be working directly with the founders on the technology platform. Being part of the core team, will be working on challenging problems and will have complete ownership of various features of the products. Your opinion will count and your ideas will translate into reality. The position will be based out of Bangalore. You will, perhaps, lead our engineering efforts eventually.








