Mobile App Developer

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 Us:

Flick.it is a dynamic and innovative sports tech startup passionate about leveraging technology to enhance player development in sports. Our AI-powered Biomechanics Analysis for Peak Athletic Performance empowers athletes and coaches with accessible data and cutting-edge technology, providing clear insights for athletes and their coaches.

Position Overview:

We are seeking a highly skilled Mobile Application Developer with some knowledge of Full Stack development to join our dynamic team. The ideal candidate will have a strong background in mobile app development, along with proficiency in both frontend and backend technologies.

Key Responsibilities:

• Design and develop mobile applications for iOS and Android platforms.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Implement user interfaces and features based on wireframes and design specifications.
• Write clean, maintainable, and efficient code across the full software development lifecycle.
• Conduct code reviews and provide constructive feedback to peers.
• Maintain code quality, organisation, and automation. Troubleshoot and debug applications to resolve issues and optimise performance.
• Stay updated with the latest trends and technologies in mobile and full stack development.
• Work closely with product management and design teams to translate requirements into technical solutions.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.

Requirements:

• 1-5 years of experience with mobile application development.
• Bachelor’s degree in Computer Science, Engineering, or related field.
• Proven experience as a Mobile Application Developer with a strong portfolio of mobile applications.
• Proficiency in programming languages such as Swift, Kotlin, JavaScript.
• Experience with mobile frameworks such as React Native, Flutter.
• Solid understanding of frontend technologies, including HTML5, CSS3, and JavaScript frameworks.
• Familiarity with backend technologies such as Node.js, Express.js, Django, or Flask.
• Experience with database systems such as MySQL, PostgreSQL, MongoDB, or Firebase.
• Knowledge of RESTful APIs and web services integration.
• Knowledge of handling video applications would be an advantage.
• Understanding of version control systems like Git.
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration skills.
• Ability to work independently and in a team environment.

Benefits:

• Competitive salary based on experience.
• Opportunities for professional growth and development.
• Collaborative and supportive work environment.
• Flexible work hours and remote work options.
• Health insurance and other benefits.

If you're passionate about sports and technology and ready to take on exciting challenges in the sports tech industry, we'd love to hear from you!

•Strong in Android, Kotlin, and MVVM architectural pattern

•Great understanding of Coroutines, Memory management, and App performance

•Solid understandings of Connectivity - BLE, WiFi

•Unit and Instrumentation testing knowledge in Espresso, JUnit4 or JUnit5, and Mockito/MockK libraries

•Experience in Dependency Injection - Hilt, Dagger2

•Good knowledge in screen navigation using Navigation APIs

•Good to have knowledge in Jetpack Compose

• Expert-level knowledge of developing Android based applications.
• Deep understanding of the internals of Android Frameworks.
• Good knowledge of OOPS concepts and JAVA.
• Familiarity with RESTful APIs to connect Android applications to back-end services.
• Experienced in building mobile applications that utilize web services.
• Experience with third-party libraries and APIs.
• Good knowledge of SQLlite database.
• Strong knowledge of Android UI design principles, patterns, and best practices
• Proficient understanding of code versioning tools, such as Git.

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

Experience: 3-5 Years 1 candidate & 1-3 Years 2 candidate

Skills:      

Core JAVA(Native), Core Kotlin, Sqlite, MySQL, XML

We are looking for a hands-on Android Developer to join the mobile team for Empuls. The applicant must have Android software development skills, and a passion for delivering high-quality, rock-solid apps. Android programming works closely with other app development and technical teams.

• Translate designs and wireframes into high-quality code.
• Design, build and maintain high performance, reusable, and reliable Java and Kotlin code
• Ensure the best possible performance, quality, and responsiveness of the application.
• Identify and correct bottlenecks and fix bugs.
• Help maintain code quality, organization, and automatization.

An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of it. We are open to promising candidates who are passionate about their work and are team players.

• Bachelor's degree or higher in Computer Science and a minimum of 4 years of Software Development experience. 
• Knowledge of mobile automation and experience on platforms such as espresso.
• Knowledge of application profiling and performance monitoring tools such as Android profiler, AppDynamics, Dynatrace, etc.
• Excellent coding skills in an object-oriented language such as Java and Kotlin.
• Experience with offline storage, threading, and performance tuning
• Have published at least one original Android app.
• Understanding of Google's Android design principles and interface guidelines.
• Strong knowledge of Android UI design principles, patterns, and best practices.

About the company:

Tathastu, the next-generation innovation labs is Future Group’s initiative to provide a new-age retail experience - combining the physical with digital and enhancing it with data. We are creating next-generation consumer interactions by combining AI/ML, Data Science, and emerging technologies with consumer platforms.

The E-Commerce vertical under Tathastu has developed online consumer platforms for Future Group’s portfolio of retail brands -Easy day, Big Bazaar, Central, Brand factory, aLL, Clarks, Coverstory. Backed by our network of offline stores we have built a new retail platform that merges our Online & Offline retail streams. We use data to power all our decisions across our products and build internal tools to help us scale our impact with a small closely-knit team.

Our widespread store network, robust logistics, and technology capabilities have made it possible to launch a ‘2-Hour Delivery Promise’ on every product across fashion, food, FMCG, and home products for orders placed online through the Big Bazaar mobile app and portal. This makes Big Bazaar the first retailer in the country to offer instant home delivery on almost every consumer product ordered online.

Location: Bangalore or Mumbai-based candidates.   

Role & Responsibility:

• Design and build advanced applications for the Android platform
• Collaborate with cross-functional teams to define, design, and ship new features
• Work with outside data sources and APIs
• 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

Requirement:

• 3-5 year of experience in Android app development
• BS/MS degree in Computer Science, Engineering or a related subject
• Should be passionate about the code you write
• Good understanding of Android jetpack libraries and internals
• Good experience on java 
• Knowledge of kotlin is a plus
• Good Knowledge of MVVM, MVP, Dagger, Observables, Livedata, Retrofit, Glide, OkHttp
• Understanding in Unit Testing will be a plus
• Proven software development experience and Android skills development
• Proven working experience in Android app development and
• Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
• Solid understanding of the full mobile development life cycle.