React Native 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.

Required 3+ years of Android development experience (or strong project experience).

Working knowledge of Kotlin and Android Studio.

Familiarity with XML layouts or Jetpack Compose.

• Ability to implement pixel-perfect UI based on design specs.
• Basic understanding of Android lifecycle and MVVM concepts.
• Experience integrating REST APIs.
• Basic Git/version control knowledge.

Good to Have

• Experience translating Figma designs into Android UI
• Understanding of Material Design principles
• Basic animations or transitions
• Awareness of accessibility standards
• GitHub or Play Store published apps

What would you do here

• Convert design mockups into pixel-accurate Android UI.
• Develop Android UI screens using Kotlin, XML, or Jetpack Compose.
• Ensure layouts adapt correctly across different screen sizes and densities.
• Fix UI bugs, alignment issues, and layout inconsistencies.
• Collaborate with designers to understand spacing, typography, and interactions.
• Write clean, maintainable code following Android best practices.
• Participate in code reviews and Agile ceremonies.

Looking for a great career as a Android Developer? NuVeda is the perfect place for you!

Who we are?

A two-time award winner for the best product from eLearning Industry (2022), NuVeda established in 2006, is a fast-growing SaaS company with offices in Minneapolis, Chennai & Bangalore.

What do we do?

As a strategic growth partner in learning and development, we help our Customers Design, Deliver & Manage all their learning interventions at scale, Measure the business impact and Monetize the learning assets.

Our Vision & Culture

With a vision to build the "Google of Learning", we thrive in an open and honest organization culture where Autonomy, Alignment to Purpose, Integrity, Continuous Learning and Development are fostered to be future ready.

Why us?

We promise you an ambitious career path, compensation & benefits as per the industry standards and a team of high pots who pushes you to your limitless potential.

Responsibilities include:

• Build efficient, testable and reusable codes.
• Collaborate with Engineers, Product Managers and Designers to quickly ship new requirements.
• Take on tough design and product problems while working cross-functionally across design and engineering to polish the product experience.
• Solve complex performance problems and architectural challenges.
• Thrive in a culture of continuous improvement by optimizing web products and related components to achieve and maintain high performance of business applications.

 Desired Skills

• 2-4 years of hands-on experience in native mobile app development.
• Strong passion for programming in Android.
• Experience in source revision control systems such as git, svn.
• Knowledgeable about MVC and MVVM architecture.
• Experience working with remote data via REST and JSON.
• Experience with SQL Lite and other databases.
• Experience with UI development.
• Experience with publishing apps.
• Positive attitude towards work (Dynamic) and good communication skills.
• Proficient in Kotlin programming, Java and Android APIs.
• Strong knowledge of Android App architectures and implementation.
• Ability to write model code for functional and non-functional requirements

Minimum 2 years of working experience.

Can work on live projects of international clients.

Can handle multiple projects

Error-free coding.

Required Experience, Skills and Qualifications

Objective-C, or increasingly, the Swift 3.0 programming language

Apples Xcode IDE

Frameworks and APIs like Foundation, UIKit, and CocoaTouch

UI and UX design experience

Apple Human Interface Guidelines

2D and 3D graphics frameworks like SpriteKit and SceneKit

OpenGL or Metal, iOS graphics APIs

Familiarity with iOS 10 and newer OS versions

A Git code repository technology

Strong Objective-C skills and inside-and-out knowledge of the iOS SDK.

Experience using and creating scalable web-based Restful APIs.

As a Flutter Developer, you will be in charge of reviewing the software specifications and UI mockups, developing a cross-browser mobile application from scratch, and leading the application testing effort. You'll work alongside a backend Developer, as well as a UI designer to ensure you create high-performing applications with a smooth user experience.

Roles and Responsibilities

1. Designing, developing, testing, maintaining, and deploying software in the Flutter framework and Dart language.

2. Developing user interface components and implementing them by following well-known Flutter / Dart workflows and 

  practices.

3. Communicating with product and engineering leads to implement business and project objectives.

4. Code review of team members' commits as part of CI/CD cycle.

5. Participate in testing, quality assurance and bug fixes as part of the CI/CD cycle.

• Significant experience working with React web and mobile along with tools like Flux, Flow, Redux, etc.
• In-depth knowledge of JavaScript, CSS, HTML, functional programming, and front-end languages
• Strong knowledge of React fundamentals such as Virtual DOM, component lifecycle, and component state
• A complete understanding of the full mobile app development lifecycle right from prototyping
• Knowledge of type checking, unit testing, typescript, prop types, and code debugging
• Experience working with REST APIs, document request models, offline storage, and third-party libraries
• Strong understanding of web technologies like JavaScript, HTML, and CSS
• Knowledge of user interface design and responsive designs
• Well-versed in a variety of React Native software and technologies such as Jest, Enzyme, ESLint, and so on

S/he will be responsible for complete react-native development and collaborate as required with product management and user experience teams. ● S/he will architect and design product features with a focus on maintainability, extensibility, scalability, and lowest operational cost. ● S/he will be responsible for undertaking proof-of-concept work where required. ● S/he will be responsible for coding and implementing features with very high coverage of unit tests and component tests ● S/he will be responsible for managing a team of android/reactive native developers, and perform design and code reviews. ● S/he will continuously discover, evaluate, and implement new technologies to maximize development efficiency What are we looking for? ● S/he must have experience in delivering projects using react native ensuring performance, quality, and responsiveness of applications ● S/he must have strong design and programming skills in Kotlin, JavaScript, Typescript, react components, Android SDK, Android Studio, SDK, RXJava, HTML5, CSS3, JS, RWD and other mobile frameworks and /or accelerators. ● S/he must have experience with offline storage, multi-threading, performance tuning, memory tuning and RESTful APIs to connect Android applications to back-end services ● S/he must have experience with Model-View View-Model, Model View Presenter software architecture, retrofit, and dagger among others

● S/he must have unit-testing the code for robustness, including edge cases, usability, and general reliability. ● S/he must have experience in mobile analytics. ● S/he must have experience in designing, optimizing and integrating business processes across disparate systems and mobile technologies.

Good-To-Haves / Desired Qualifications

● It would be good if, s/he has the ability to multi-task, prioritize, be attentive to detail, have an eye for design, think logically, organize and communicate coherently. ● It would be good if, s/he is fast paced, collaborative / team player, performance-driven and self-motivated ● It would be good if, s/he is curious, analytical, a problem solver and has logical reasoning.

Android Development Engineer - Chennai  

Who we are?  

Kaleidofin is a financial platform for the informal sector, which provides solutions tailored to the customer’s goals and are intuitive to use. We are working towards creating fair and transparent financial solutions that can target millions of customers and enterprises in India that don’t have easy access to formal financial planning.  

In a very short time span, global investors such as Omidyar Network, Blume Ventures and well known individual investors have supported Kaleidofin’s well thought out business model with $2.8 million in seed funding.  

With its focus to harness mobile technology to deliver a paperless experience as well as its focus to harness technology and analytics to predict the right product for the right customer, Kaleidofin aims to become a leading FinTech player bringing financial solutions to everyone.  

To know more about Kaleidofin, do visit our site https://kaleidofin.com/  

What You’ll Do?  

We are seeking extremely smart Android developers who are passionate about pushing mobile technologies to the limits. You will:  

• Design and develop products by working closely with business teams
• Design super intuitive experiences in the next generation of our mobile applications  
• Build performant, scalable, yet secure, enterprise ready android applications with architecture that is fast yet lean on the backend servers enabling them to support millions of users in parallel  
• Build enterprise ready back end architectures that can support millions of users in parallel 

• Gain experience with hands on coding and independent ownership of software components 
• Follow strong engineering best practices and champion their adoption 

Who You Need To Be? 

• 2+ years’ experience in android software development and delivery 
• Bachelors or Masters degree in engineering from a reputed institute(preferably IITs, NITs, or other top engineering institutes).  

• Strong grasp of CS fundamentals, algorithms and excellent problem solving abilities. 
• All experience should be from good product development or e-commerce background. 
• Must have shown good stability in all your previous associations. 
• Skill set 

• Knowledge of UI architectural patterns like MVVM(preferable), MVC, MVP, data binding, activity & fragment lifecycle, recycler view, navigation component, layouts (constraint layout preferable), theming etc. 

• Should have actively used retrofit, work managers, android jetpack, Rx java, dagger, retrofit, android sdk, GIT/bitbucket, gradle/ant and very keen on exploring other proven tech stack. 
• Comfortable with test driven development in android with UI testing, instrumented unit testing and unit testing using junits, mockito or other tools. 
• Willingness to learn and write simple backend REST API’s (preferably in Java, spring boot & hibernate) without having to completely depend on backend engineers for delivery 
• Has worked in a fast paced agile organization building stateless and re-entrant/resumable android applications.