iOS 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.

It is one of the leading TMT bar manufacturers and exporters in India. It is a well-known group that achieves a turnover of 3000 Cr per annum. The group is setting up a construction & architecture-oriented omni channel B2B & B2C platform. Merito, a curated talent platform is responsible to identify key resources for this project.

Job Location: Kolkatta

Job Description:

• 3-9 yrs experience in developing new features and user interfaces from wireframe models
• Ensuring the best performance and user experience of the application
• Fixing bugs and performance problems
• Writing clean, readable, and testable code
• Cooperating with back-end developers, designers, and the rest of the team to deliver well-architected and high-quality solutions
• Complete knowledge of Uploading app on google play store and Apple app store
• Through analytical skills to Recommend system solutions by comparing advantages and disadvantages of custom development and purchasing alternatives

Requirement

• extensive knowledge of mobile app development. This includes the whole process, from the first line of code to publishing in the store(s)
• Deep knowledge of Kotlin, Flutter,Android, iOS, etc.
• Proficiency with writing automated tests. depending on the libraries you use to test
• Familiarity with RESTful APIs and mobile libraries for networking
• Experience with profiling and debugging mobile applications
• Strong knowledge of architectural patterns - MVP, MVC, MVVM, and Clean Architecture -and the ability to choose the best solution for the app
•  Familiarity with Git
• Familiarity with push notifications
• Understanding mobile app design guidelines on each platform and being aware of their differences
• Proficiency in Kotlin/Java/Swift/Flutter/Dart

Responsibilities:

• Writing clean and efficient codes for iOS applications

• Supporting the entire application lifecycle from concept to design, testing, release and support

• Troubleshooting and bug fixes for applications, to ensure that codes are clean and secure

• Recommending changes and enhancements

• Staying up to date with new mobile technology trends, applications, and protocols

Required skills:

• Degree in Computer Science, Engineering or a related field

• You have prior experience as an iOS Developer

• You have a portfolio of released applications on the App Store

• You are familiar with mobile product and design lifecycles

• You have proven experience in iOS development in either Objective-C / Swift

• Experience with iOS frameworks (Eg. Core Data, Core Animation etc.)

• Familiarity with RESTful APIs to effectively integrate iOS applications

• Good understanding of iOS release cycle and familiarity with CI/CD platform and pipelines

• Proficient understanding of code versioning tools (eg. Git)

• Familiarity with various testing tools

React Native Developer Responsibilities

• Architect, develop, and maintain high-quality React Native applications using clean code.
• Use additional JavaScript libraries, such as Redux, to make asynchronous API calls and enhance website loading speed.
• Implement pixel-perfect user interfaces that match designs.
• Diagnose and repair bugs and performance bottlenecks for native-like performance.
• Reach out to the open source community to encourage and assist in implementing mission-critical software fixes—React Native moves quickly and frequently breaks things.
• Participate in sprint retrospectives and daily standups as well as two-week sprints.
• Utilize new, contemporary, smooth animations and transitions to provide a great user experience.
• Plan the data and presentation layers of the application's front end.
• Be a part of a React Native developer community that shares knowledge and assists one another when problems arise.

React Native Developer Requirements

• Bachelor's/Degree Master's in Computer Science/Information Technology plus 3+ years of industry experience.
• Extensive knowledge of React tools such as Webpack, Enzyme, React.js, Flux, and Redux.
• Strong command of the JavaScript, TypeScript, or ClojureScript languages and their nuances, including ES6+ syntax.
• REST API knowledge, the document request model, and offline storage.
• Ability to identify with FullStack clients' goals and commit to delivering on the promises you and your team make to them.
• You work well in groups and enjoy working in the office with your coworkers.
• A positive outlook and a go-getter attitude

Min 3 yrs of working in Android

Min 2 yrs of working in iOS

Min 6 months working in React Native

Min 1 yr of team handling experience

Development

Strong in data structures and algorithms

Strong problem solving and analytical abilities

Hands-on with SOLID design principles

Should have developed and delivered successful mobile app projects

Experience in -

Consumer facing apps

Analytics SDKs integrations

Marketing SDKs integrations

Performance optimisation

SQL databases

Building production grade mobile applications

Experience in working in Agile/Scrum projects and fast paced environments

Preference for candidates with :

Payments/financial systems background

Personality

Result oriented

Initiative taker. Not expecting spoon feed.

Team player - looking beyond personal KRAs and helping the team succeed

3H - Humble, Honest and Hard-worker

DevDarshan is a devotional platform launched by IIT graduates to promote the teachings of Indian culture and the Hindu way of life in India around the world. In the 21st century, where everything around is digitized then why not temples. That’s the idea behind DevDarshan.We’ve built a community of devotees from multiple Countries, through our Mobile Application that connects Temples and Devotees, have successfully raised seed investment and also started to generate revenue for the temples and Priests associated with us. Right now we are looking to grow our team and build new exciting features for devotees all around the world.

This is where you come in.

We are looking for a passionate and self-motivated individual to help our mobile application.

Requirement:

• Solid understanding and Proven working experience of Flutter, Dart, Flutter UI, and animations.
• Extraordinary sense of architecture, design, and writing clean code using reusable components
• Should have experience working with native technologies like Android, iOS
• Experienced in working with remote data via REST and JSON
• Should have published one or more mobile apps in Google Play or App Store
• Experience working in an agile development process
• Proficient understanding of code versioning tools, such as Git.
• Write clear, maintainable, and testable code that you are proud of

The Role

This role is a senior developer role which will naturally progress into a Mobile App Team Lead role.

The ideal candidate will need to have complete ownership over the development aspect of the mobile app.

We are hiring for one of our clients (building an immersive platform for creators, from India, which can be used by creators to create content and engage their audience across the world. And they are looking for smart and motivated 'Mobile Engineers' to help build it.

For this, they need someone who has working knowledge in building quality mobile apps in React-Native/Flutter, handling device specific aspects, etc.

Being a Mobile Engineer at this organization will be like a feeling to build something that millions of users across the world can interact with. You will be helping in setting forth the mobile-frontend culture and journey.

Also, experience the working in the early team, shape a startup from the grounds up and be a part of the high growth journey.

Key Responsibilities: -

1. Build and deploy product features end to end.

2. You will build high quality features for a mobile app from grounds up, and can use patterns like composition, inheritance, renderProps, etc.

3. Research and implement things wherever needed, think automating via Fastlane CI/CD, testing logically so it works across multi-resolution devices, etc.

4. Setting up events for user, performance, and error analytics, think GA, hotjar, sentry, etc.

5. Participate in product and design ideation, collaborate with the team to implement high-quality features.

Requirements: -

1. Solid foundation in JS and React Native.

2. Passionate about product and drives it with engineering.

3. Architectural familiarity of implementation, not just UI features.

4. 1+ years of experience in building quality apps in React Native.

5. Identify and resolve performance and device specific issues.

6. Can adapt to best practices and learn device specific things in Android/iOS.

7. Code quickly and test thoroughly - maintain the balance between velocity and code health.

8. Great taste in UI and UX

Perks: -

1. Become a part of our early team, and shape products from grounds up

2. Attractive compensation and esops.

3. Macbook pro

4. Empowered to build an amazing startup culture with us

5. Full ownership and massive growth opportunities

6. and more...

The organization is funded by India's top executives and angel investors. 

Who we are

ixigo is an AI-based travel app that helps millions of users plan and book their trips every day. Launched in 2007, ixigo is proud to have built numerous industry-first AI-innovations over the last decade. With pre-emptive help from ixigo at every touch-point of their journey, 150 million Indians are now making smarter travel decisions every year. ixigo uses Artificial Intelligence for deal discovery, personalized recommendations, dynamic marketing, airfare predictions, train delay information, PNR confirmation status, infrastructure cost optimization, business intelligence and providing fully-automated customer service over chat and voice. This makes ixigo a lean, tech-intensive and capital-efficient travel business, serving millions of travelers with a team size of under 200. Founded in 2007 by Aloke Bajpai & Rajnish Kumar, ixigo’s investors include Sequoia Capital India, Fosun RZ Capital, SAIF Partners, MakeMyTrip & Micromax.

The iOS Team

Our iOS team is always keen to stay ahead of the curve by always adopting the latest tech in the valley. We were first to market with adopting iPhone X layout, implementing ARKit in 2017, and Siri Shortcuts in 2018. We have been featured across app store over a dozen times in the past 2 years in Today, Apps, and Travel section.

Compensation: Commensurate to skills & experience; comparable to the best in the industry.

Culture: ixigems enjoy a fun and rewarding work atmosphere. We do not believe in hierarchies, and we encourage communication and constructive collaboration. We believe in the personal growth of individuals, creative approaches to solve real-world problems, and questioning the status quo!