Senior Android 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.

Job Description: As an Android Developer at [Company Name], you will be responsible for designing, developing, and maintaining Android applications. You will leverage your expertise in Java and Kotlin to create robust and user-friendly mobile solutions. Your role will involve working closely with cross-functional teams to deliver high-quality applications that meet our users' needs.

Key Responsibilities:

• Application Development: Design, develop, and maintain Android applications using Java and Kotlin.
• Code Quality: Write clean, maintainable, and efficient code, following best practices and coding standards.
• Collaborate: Work closely with product managers, UX/UI designers, and other developers to define and implement new features.
• Debugging and Testing: Identify, debug, and resolve technical issues and perform unit testing to ensure application quality.
• Performance Optimization: Optimize application performance and ensure scalability and reliability.
• Stay Updated: Keep up with the latest industry trends, technologies, and best practices in Android development.
• Documentation: Create and maintain documentation for code, development processes, and system architecture.

Required Skills and Qualifications:

• Android Development Experience: 4 years of hands-on experience in Android application development.
• Java Expertise: 4 years of experience with Java, including knowledge of Android SDK and core libraries.
• Kotlin Proficiency: 2 years of experience with Kotlin for Android development.
• Android Studio: Proficiency in using Android Studio and related development tools.
• APIs and Integration: Experience integrating with RESTful APIs and third-party libraries.
• UI/UX: Understanding of Android UI/UX design principles and guidelines.
• Problem-Solving: Strong analytical and problem-solving skills, with the ability to troubleshoot and resolve issues efficiently.
• Communication: Excellent verbal and written communication skills.

Building a first-of-its-kind, lifestyle health product for Women in India. We believe that the future of health and fitness is digital, and women will drive the digital fitness revolution in India. Existing digital health and fitness products are highly transactional and we see a huge opportunity to build a truly aspirational product that will inspire and empower millions of women to lead healthier lives. If you are passionate about building a product that blends together technology, content, and community, we would love to talk to you.

Looking for results-oriented Engineers. An ideal candidate for us would be a passionate builder of great products/frameworks and someone who would thrive in a fast-paced environment and enjoy the challenge of complex business contexts that are typically being defined in real-time. In this role, you will be responsible for building world-class technology products and platforms that are at the forefront of the technology revolution in the Indian healthcare ecosystem. You are someone who insists on the highest standards for quality, maintainability, and performance. You will be working in a fast-paced and agile work environment delivering quality solutions that have an immediate business impact.

Responsibilities

• Own the end-to-end development and launch of features on the our App
• Participate in scoping, planning discussions with the designers, PMs, and Leads
• Conceptualize and develop prototypes quickly
• Develop and own launch plans to completion
• Identify opportunities and implement solutions to improve the performance and the architecture of our App
• We will depend on this person to set-up/improve the code quality, tracking, and App architecture and this person needs to have extensively worked on React + Android/iOS

Required Skills

• Min. 3 years of Full-time work experience (College projects, Internships are not a part of this)
• Hands-on experience with React Native
• Deep expertise of either iOS or Android platform and ecosystems
• Deep understanding of your tools: Languages, frameworks, systems.
• Experience with abstracting requirements into frameworks.
• Has worked with the react ecosystem for eg, redux, react-query, react-router etc.
• At least 2 years of experience working in a consumer tech set-up (ecommerce, D2C)
• Work with Rest APIs

Good-to-have Skills

• Experience with video streaming and Real Time Communication technologies.

• As an independent, self-motivated, and an avid technologist, you should have a strong interest in mobile and intuition for UX and consumer behaviour
• Up to date knowledge of Android (Jetpack and RxPatterns)
• Experienced in publishing and maintaining apps in play store
• Excellent Java programming skills
• Experienced in writing testable code & unit tests
• Experience with the Kotlin programming language a plus
• 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
• Familiarity with the use of additional sensors, such as gyroscopes, accelerometers, GPS
• 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 (JETPack, Rx patterns)
• Proficient understanding of code versioning tools, such as Git
• Familiarity with continuous integration

Anju Siima Technologies Pvt Ltd. is a leading software company seeking creative and skilled developers to join our fast growing team. Our mission is to design and develop technology that improves the lives of its users, while providing an exceptionally high level of service to our clients.

We are looking for experienced developers who want to be part of a fast-paced, dynamic environment, where everyone’s opinions and efforts are valued. We hire outstanding professionals and give them the opportunity to thrive in a collaborative atmosphere that values learning, growth, and hard work.

Our team of 16+ professionals is working on Guntur and Hyderabad branch, Additionally, many of our team members who aren’t located near one of our offices, work remotely. We provide a highly competitive compensation and benefits package.

Job Description

We are looking for a Dart/Flutter Developer responsible for creating multi-platform apps for iOS and Android using Google’s Flutter development framework. The primary focus will be on creating new experiences and maintaining existing apps. Deep experience contributing to and managing high-scale production mobile apps. You must have previous experience in Flutter and Dart development.

Responsibilities

• Design & implement new app modules based on the product requirements using Flutter framework
• Maintain existing codebases
• Build reusable code and libraries for future use
• Integrate user-interfaces elements developed by other developers
• Build user interfaces designed by UI/UX designers
• Integration of data storage solutions
• Integrate various APIs from third parties
• Debug existing apps components, fix issues and avoid regressions
• Collaborate closely with the teams of UI/UX designers, PMs, QAs, and other developers
• Participate in software architecture, design discussions and code reviews
• Optimize application for maximum speed and scalability
• Follow the company guidelines and best practices

Skills And Qualifications

• You have a bachelor’s degree in computer science or related discipline
• Must have built at least two Android and/or iOS apps with Flutter 
• Proficient in Java/Kotlin programming
• Knowledge and experience in Flutter Framework and DART programming
• Hands on experience in using RESTful APIs
• Hands on experience in designing and developing micro-services architecture and containers
• Experience with third-party libraries and APIs
• Hands on experience in designing and developing micro-services architecture and containers
• Object oriented analysis, UML and design using common design patterns.
• Hands on experience in development IDE Android Studio, Android SDK, Firebase Test Lab.
• Experience with offline storage, threading, and performance tuning.
• Experience with Mobile design patterns e.g MVVM, GoF, Bloc, Provider & etc.
• Experience in writing secure mobile applications (OWASP Mobile Top 10)
• Familiarity with push notifications
• Familiarity with IOS integration with Flutter
• Experience using GitHub or similar environment
• Complete understanding of SDLC
• Experience with Agile development
• Experience with Material Design and Android UI design principles, patterns and best practices
• Good knowledge of adding third-party libraries
• Ability to understand business requirements and translate them into technical requirements
• Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
• A track record of delivering successful complex consumer product apps (finance apps, e-commerce apps)

Mandatory: Hands on experience working with Java or Kotlin. Very strong logical skills. Good hold on operating system concepts and data structure. Experience with web services , SQL Lite , camera kit , image caching concepts, keychain , past experience working with one of the design patterns like MVC / MVVM / MVP , network check implementation.

Good to have:  Rx-Swift experience , video / image filter experience , media player usage , complex UX effects , couch-db , RealM.Knowledge of GIT management , Continuous Integration and Continuous Development practices.

Soft Skills: Strong communication skills , high spirited , eager to learn , able to perform in a high pressure environment

Roles & Responsibilities:

• Build and technically lead Android apps in terms of scale, performance, security, and design
• Actively participate in feature design
• Unit-test code for robustness, including edge cases, usability, and general reliability
• Take ownership of the features right from estimating timelines to Production release
• Carry out code reviews and mentor junior engineers
• Instill best practices from following MVP/MVVM patterns to using required Java design patterns within the application
• Understand the latest Android features and practices and lead the efforts towards its adoption within the team and across all mobile pods
• Follow SOPs of Agile methodologies & Sprint deliverables and drive the same within the team

Requisites / Prerequisites:

• Android Work Experience of between 3 to 5 years.
• BE/B.Tech from Tier 1 or Tier 2 institutions
• Strong understanding of Object Oriented Programming, data structures and design patterns
• Experience in developing B2C / B2B mobile applications
• Experience in memory management and in designing high-performance applications
• Strong Java, Design Patterns and OOPS knowledge and hands-on experience
• Experience in shipping applications through the Google play store
• Experienced in Android Material Design
• Basic SQL knowledge
• Experience in working with JUnits and other Unit Testing framework is a plus
• Experience in OpenGL and animations is a plus