Mobile Development Engineer: React Native

Key Responsibilities

• Design and develop high-performance, user-friendly mobile applications using React Native
• Collaborate with cross-functional teams to define, design, and ship new features
• Write clean, scalable, and efficient code following best practices
• Integrate third-party APIs, native modules, and libraries
• Debug and resolve application issues and performance bottlenecks
• Handle end-to-end app deployment on Play Store and App Store
• Stay up to date with the latest trends in mobile development

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 UpSolve:

UpSolve is a cutting-edge AI company specializing in providing sophisticated solutions for business decision-making. Our AI solutions cover a wide spectrum, including Video, Image, and Text analysis, empowering businesses to make quicker and more precise choices.

Role Description:

We are seeking highly motivated Hybrid App Developers to join our dynamic team in Mumbai. As an App Developer, you will play a crucial role in developing top-notch applications for both iOS and Android platforms. Your expertise will be essential in delivering high-quality, user-friendly applications that align with our company's mission and vision.

Key Responsibilities:

• Collaborate with cross-functional teams to design, develop, and deploy hybrid applications for iOS and Android platforms.
• Implement user-friendly interfaces and engaging user experiences using application development frameworks and programming language.
• Ensure application performance, responsiveness, and efficiency across various devices.
• Work on UX/UI designs and translate design concepts into functional app interfaces.
• Conduct thorough code reviews, identify bugs, and implement solutions to maintain code quality.
• Stay updated with the latest industry trends, technologies, and best practices in hybrid app development.

Qualifications:

• Minimum 1.5 years of hands-on experience in hybrid app development.
• Strong understanding of mobile app architecture and UI components.
• Familiarity with RESTful APIs and integration of third-party libraries.
• Ability to work collaboratively in a fast-paced environment, with excellent communication skills.
• A portfolio of previous app projects demonstrating your expertise and creativity.
• Bachelor's degree in Computer Science or related field is preferred.

What does the core role include?

• Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
• Designing stateless components in React Native
• Contributing in all phases of the development lifecycle
• Working with the developers to create and maintain a robust framework to support the apps
• Working with the developers to build the interface with a focus on usability features
• 
  

What else can you expect in the role?

• Prepare and produce releases of software components
• Optimizing performance for the apps
• Problem-solving skills, analytical mind, and positive attitude
• Ability to think from end users perspective and focused on improving the overall product experience.
• Deliver across the entire app life cycle concept, design, build, deploy, test, release to app stores and support
• 
  

What can fetch you brownie points?

• Hands on experience with React Native is required
• Hands-on experience in React Native APIs, ReactJS, Javascript, ECMAScript (OOJS) and JSX.
• Strong understanding of JavaScript ecosystem
• Hands on experience on Android in creating Hybrid / Native applications
• Demonstrable UI/UX experience on a large-scale app.
• Thorough understanding of React Native development tools like IDEs (Nuclide, Atom, Sublime Text, or Visual
• Good knowledge of JS frameworks like ReactJS is a plus.

Desired Skills and Experience

Hybrid Apps,React Native, Native iOS and Android Architecture understanding

• Collaborate with a team of developers and designers to create a web application run on multiple platforms
• Create reusable, effective, and scalable JavaScript code
• Design the data and presentation layer of the web application’s front-end
• Use additional JavaScript libraries such as Redux to manage the web application’s state, derive computed data from the state of the system, and make asynchronous API calls

• English language proficiency
• 2+ years of professional experience in Native React
• Highly proficient in rendering components with Native APIs
• Highly proficient in JavaScript, modern JavaScript, HTML, 
• Highly proficient in one or more libraries (e.g. Redux, React Router, etc) for state managing and routing in addition to React.

Frontend Developer   

2-4 years/Remote or Kochi   
                                        

Farmers Fresh Zone, is a Direct to Consumer Brand Backed by the Indian Angel Network. The startup lives across 5 South Indian cities. We cater to the needs of urban customers with our safe-to-eat, pesticide-free fruits & vegetables that are directly sourced from our farmers. This is possible with our technology-driven platform & demand prediction model. In short, we’re the high-tech marketplace that’s beneficial to both, the consumers & farmers.

For more info visit our website: https://www.farmersfz.com/">https://www.farmersfz.com/

The role, in a nutshell

As a Frontend Developer at FFZ, you will be part of our core development team, and will have complete ownership of our frontend application. You will bring  concepts / user stories to life with ReactJS/Next.JS, HTML and CSS and an opportunity to create highly responsive web designs that work across multiple platforms and browsers. 

What you’ll do at FFZ

• Bring concepts / user stories to life with ReactJS/Next.JS , HTML and CSS
• Create highly responsive web designs that work across multiple platforms and browsers.
• Ensure the technical feasibility of UI/UX designs and implement them.
• Explore and implement SEO best practices

Who you are

• At least 2 years of experience working on Typescript/JavaScript, React/React Native
• Experience / willingness in working with Next.js
• Experience with front-end development tools, build tools and versioning tools.
• Ability to write clean code, necessary tests and ensure high code quality.
• Experience integrating REST APIs and services
• Understanding / familiarity with web security concepts.

Nice to have

• Experience working with Flutter (preferred) or any other cross-platform development tool
• Experience developing mobile applications.

What we offer 

• Complete ownership of our frontend application.
• Competitive salary and an excellent equity package.
• Stellar team, great start-up culture, work-life balance with generous holidays. 

React Native Job Description

• Work as part of a small team to build React Native iOS / Android applications for clients.
• Architect, build, and maintain excellent React Native applications with clean code.
• Implement pixel-perfect UI's that match designs.
• Implement clean, modern, smooth animations and transitions that provide an excellent user experience.
• Integrate third-party APIs.
• Write unit and integration tests.
• Release applications to the Apple and Google Play stores.
• Work with native modules when required.
• Work as part of a small team of a software developers.
• Complete weekly sprints, and participate in sprint retrospectives and daily standups.
• Assist with building estimates.
• Work with modern tools including Jira, Slack, GitHub, Google Docs, etc.
• Be part of a community of React Native developers who share knowledge and help each other as problems arise.
• Follow the software development process.

Requirements

• 2+ years of professional experience working with React Native.
• 4+ years of professional software development experience.
• Experience working with Swift, Objective C, and Java a plus but not required.
• Meaningful experience working on large, complex systems.
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon, both in regards to estimates and to the general process.
• Ability to identify with the goals of clients and dedicate yourself to delivering on the commitments you and your team make to them.
• An understanding of React Native best practices and a commitment to following them.
• Ability to work through new and difficult React Native issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of React Native applications.
• A positive mindset and can-do attitude.
• A passion for software development. It’s not just your career, it’s also your hobby. You’re constantly striving to learn new things and improve. You follow industry news, regularly tinker with new technologies, and read books and blogs to keep your skills current.
• You work well within a team environment and enjoy working in the office with your colleagues.

Job Description Responsibilities:

• Design and build mobile applications using React Native

• Build native component for iOS (Native experience would be plus) or Android

• Collaborate closely with the Team lead to understanding the requirement and implementation details.

• integration with third-party APIs.

Required Skills:

• 2yrs experience in React-Native based app development is a must.

• Must have published at least 1 major React-Native app

• Knows how to embed React-Native in a native(iOS/Android) component and vice versa

• Strong focus on app performance.