Senior 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.

Software Development Engineer III (React Native)

Experience: 7+ years

About Wekan Enterprise Solutions

Wekan Enterprise Solutions is a leading Technology Consulting company and a strategic investment partner of MongoDB. We help companies drive innovation in the cloud by adopting modern technology solutions that help them achieve their performance and availability

requirements. With strong capabilities around Mobile, IOT and Cloud environments, we have an extensive track record helping Fortune 500 companies modernize their most critical legacy and on-premise applications, migrating them to the cloud and leveraging the most cutting-edge technologies.

Job Overview

We are seeking an experienced and passionate Mobile Software Development Engineer (SDE-3) with expertise in React Native. In this senior role, you will lead efforts to modernize legacy applications and develop new, high-performance mobile applications for large enterprise

clients and growth-stage startups. You will play a key role in mission-critical projects, working closely with business stakeholders, customer technical teams, and MongoDB Solutions Architects.

The ideal candidate will have strong technical leadership, system design expertise, and a track record of mentoring junior engineers. You will thrive in a fast-paced environment, driving the delivery of scalable, high-quality mobile applications.

Location - Chennai or Bangalore

Required Experience and Skills:

● 7+ years of experience in mobile application development, with at least 3+ years of hands-on experience working with React Native and TypeScript.

● Proven experience building high-performance mobile applications for

enterprise-grade solutions or high-traffic consumer apps.

● Solid understanding of mobile architecture, component design, and system performance optimization, with hands-on experience in testing, debugging, and performance tuning.

● Expertise in integrating RESTful APIs, third-party SDKs, and cloud services into mobile applications.

● Experience with state management libraries such as Redux or Context API.

● Strong proficiency in JavaScript (ES6+) and TypeScript, with a deep understanding of modern front-end development practices.

● Hands-on experience with mobile build tools, CI/CD pipelines, and version control systems.

● Strong problem-solving skills, attention to detail, and experience writing and maintaining clear, detailed technical documentation.

● Excellent verbal and written communication skills, with the ability to clearly explain complex technical concepts to both technical and non-technical stakeholders.

Good to Have Skills:

● Familiarity with Atlas Device Sync, Ditto, PowerSync, ObjectBox, or similar technologies for offline-first solutions and data synchronization in mobile apps.

● Experience with native mobile development (e.g., Swift for iOS, Kotlin/Java for Android).

● Familiarity with cloud platforms such as AWS, Azure, or GCP, and Mobile Backend-as-a-Service (MBaaS) solutions (e.g., Firebase, AWS Amplify).

Job Description

We are seeking an experienced and highly skilled Senior Android Developer to join our Banking project team. As a Senior Android Developer, you will be responsible for designing, developing, and maintaining the Android Application for our service-oriented project. This is an excellent opportunity to work in a dynamic and collaborative environment, leveraging the latest technologies to deliver cutting-edge service.

Responsibilities:

• Collaborate with cross-functional teams to design, develop, and deliver high-quality Android applications with a strong emphasis on user experience (UX).
• Utilize architecture patterns and best practices for scalable and maintainable code.
• Implement reactive programming for efficient and responsive applications.
• Integrate third-party SDKs to enhance application functionality.
• Conduct regular code reviews to ensure code quality and adherence to best practices.
• Lead and contribute to sprint planning, dev analysis and ensure timely delivery of milestones.
• Manage and mentor team members, fostering a collaborative and productive work environment.
• Communicate effectively with clients to understand requirements and provide updates on project progress.
• Improves testability, team documents.
• Stay updated with the latest trends and technologies in Android development.

Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, or a related field. Relevant experience 5 to 8 years.
• Proven experience as an Android Developer, preferably in a senior or lead role, with a strong focus on service-oriented projects.
• Good working knowledge of Android and Core Java.
• In-depth knowledge of architecture patterns such as MVP and MVVM.
• Experience with reactive programming using RxJava.
• Proficient in utilizing Dependency Injection tools.
• Hands-on experience with integrating third-party SDKs.
• Familiarity with Kotlin programming language.
• Excellent problem-solving and analytical skills, with the ability to debug complex issues and propose effective solutions.
• Proficiency in UI rendering and performance optimization.
• Demonstrated ability in team management, including sprint planning and handling deliverables.
• Effective communication skills for collaboration with cross-functional teams and clients.
• Ability to adapt to new technologies and learn quickly.

Good to have:

• Familiarity with Kotlin programming language.
• Backend understanding to facilitate effective communication with backend developers.
• Experience with cross-platform development frameworks (e. g., Flutter) is a plus.
• 
  

Our Culture and policies we believe in and live by at Nuclei:

• Profitable company with a team-first culture
• Everyone is encouraged to take decisions and lead. Complete freedom with responsibility.
• Work from anywhere - Goa or Bali or Ladakh - Permanently remote
• Unlimited leaves - There is no leave policy at Nuclei.
• 5 days working. Friday 2nd halves are focused on learning and development
• What we do is a part of work - Bookclub, Hackathons/ Ideathons, Chess club, Expert talks, etc. To explore opportunities to evolve ourselves as an individual and team.

-Strong understanding of Swift & Objective-C, MVC/MVVM, and Cocoa APIs/frameworks

-Experience with AVFoundation, CoreData,Core location, CoreAnimation, CoreGraphics, NSURLSession,

iOS background modes, tvOS, JSON, CocoaPods,3D touch.

-Familiarity with RESTful APIs to connect iOS applications to back-end services.

-Strong understanding of Apple's design principles and interface guidelines.

-Strong understanding of auto layout and UI implementation.

-Strong understanding of Git.

-Understanding of the full mobile development life cycle.

-Experience with third-party libraries and APIs.

-Establish unit-test code for robustness, including edge cases, usability, and general reliability.

-Knowledge in making network calls using Alamofile(swift), AFNetworking(Objective - C), and using native

NSURLSession.

-Good debugging skills and knowledge to use Instruments App.

-App store deployment and certificate management knowledge.

-Knowledge in Firebase Real-Time dB and FCM will be a plus.

-Experience in implementing universal linking in iOS.

Benefits

We pay top salaries with lucrative esops options.

Opportunity to work and learn with very mature, helpful and highly motivated techies.

Our environment is vibrant and full of energy. We are looking for like-minded people who love to “code” and have passion in building great software.

Flexible timings.

Quarterly parties

Rewards and Recognitions

Unlimited Leaves

Flexibility to work remotely

Flexibility to work from Gurgaon or Bangalore Office

Half yearly review cycle

React Native Lead. We want you to have a chat with the candidates whether they are good on these points and do they have the experience as per mentioned in JD. It will be beneficial for us to filter out profiles for RN Lead.

Job Description / what you'll be doing

• Leading the team to build cutting edge React Native applications.
• Architects build and maintain excellent applications with clean code.
• Implement pixel-perfect UI's that match designs. Knowledge of scalable sizing of UI is a must.
• Implement clean, modern, smooth animations and transitions that provide an excellent user experience.
• Integrate third-party APIs.
• Write unit and integration test cases.
• Release applications to IOS and Google Play stores.
• Must understand iOS and Android native code which can be used to write bridges.
• Can work in pod structure. 
• Must be comfortable in the SCRUM process. Complete two-week sprints and participate in sprint retrospectives and daily standups.
• Assist with building estimates and pipeline for tasks rollout.
• Good communication and people skillset.
• Work with modern tools including Jira, Slack, GitHub, Firebase, GTM, Google play console, AppStore Connect, etc.
• Be part of a community of developers who share knowledge and help each other as problems arise.
• Ability to work through new and difficult issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of applications.
• Must be familiar with profiling and performance monitoring of the application.
• Ability to achieve stretch goals in a highly innovative and fast-paced environment

Requirements

• 6+ years of professional experience working with Mobile application development and 2-4+ years of experience with React Native development.
• Experience working with Swift / ObjectiveC, Java / Kotlin required.
• Should have a crystal understanding of App architecture and how to React interacts with the native layers for iOS and Android respectively
• Excellent JavaScript Developer has a deep understanding of scope and closures, ES6, Object prototypes, Async, Hooks, Functional components, and Performance
• Excellent Code reviewer and champion at writing unit test cases
• Should be able to evaluate alternative multiple system designs and solutions and make data-backed decisions in his/her approach
• Meaningful experience working on large, complex systems.
• Ability to take 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. extreme ownership
• An understanding of best practices and a commitment to following them.
• A positive mindset and can-do attitude.
• Forensic attention to detail.
• Mentoring, onboarding, and interviewing the candidate
• Experience mentoring junior software engineers to improve their skills and make them more effective product software engineers
• Experience influencing software engineers- best practices within your team
• Passion to design and develop intuitive user interface
• Sound business judgment, proven ability to influence others, and strong analytical thinking skills
• You work well within a team environment and enjoy working in the office with your colleagues.