
#Must be Proficient in Swift, Objective C, Apple’s Xcode IDE
#Knowledge of frameworks and APIs like Foundation, UIKit, and CocoaTouch
#Apple Human Interface Guidelines
#OpenGL or Metal, iOS graphics APIs
#Familiarity with iOS 10 and newer OS versions
#Knack for benchmarking and optimization
#Experience on web service integration (SOAP, REST, JSON, XML)
#Familiarity with cloud message APIs and push notifications
#Using version control (e.g. SVN, GIT)
#Excellent debugging and optimisation skills
#Good to have backend development skills

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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 HeyCoach:
We are an exceptional group of highly skilled individuals, passionate about addressing a fundamental challenge within the education industry. Our team consists of talented geeks who possess a deep understanding of the issues at hand and are dedicated to finding innovative solutions. In our quest for excellence, we are constantly seeking out remarkable individuals who can contribute to our growth and success. Whether it's developing cutting-edge technologies, designing immersive learning experiences, or implementing groundbreaking teaching methodologies, we consistently strive for excellence.
Job Description:
- Mobile App Development: Collaborate with cross-functional teams to design, develop, test, and deploy robust and scalable Android applications.
- Code Optimisation: Write clean, maintainable, and efficient code, with a focus on performance and responsiveness. Identify and address bottlenecks and bugs.
- UI/UX Implementation: Work closely with designers to implement visually appealing and intuitive user interfaces. Ensure seamless integration between the front-end and back-end components.
- API Integration: Integrate with RESTful APIs and third-party services to enhance app functionality and data exchange.
- Testing and Debugging: Conduct thorough testing of applications, including unit testing and debugging. Collaborate with quality assurance teams to ensure the delivery of high-quality software.
- Platform Compatibility: Stay updated on the latest Android platform updates and ensure compatibility with various devices and screen sizes.
- Performance Optimization: Continuously optimize application performance, keeping up with best practices and industry standards.
- Collaboration: Work closely with other developers and team members to achieve project goals. Participate in code reviews and knowledge-sharing sessions.
Requirements:
- Engineers with 1-6 years of experience in shipping consumer-facing Android apps with the large user base, ideally currently available on the Google Play Store.
- Top-notch programming skills in Java, Kotlin and Android along with MVVM, Dagger2, Room, LiveData, Coroutine & JetPack-Components.
- Command of memory management, view hierarchy, battery optimisation and in-depth experience with multi threaded and networked applications.
- Worked with Restful APIs, third-party SDK Integrations and common technologies like HTTPS, JSON, OAuth, and SQL.
- Thorough working knowledge of Android Studio with the Gradle build system.
- Understanding the quirks of the fragmented ecosystem of Android OS versions and devices.
- Focus on Material Design principles and pixel-perfect implementation of the design into code.
- Solid experience with Git Care for quality with an obsession for performance and willingness to spend time testing the team's work as well as yours.
B.Tech./MCA
3+ experience as an app developer.
Proficient in Objective-C, Swift, and Cocoa Touch.
Extensive experience with iOS Frameworks such as Core Data and Core Animation.
Knowledge of iOS back-end services.
Knowledge of Apple’s design principles and application interface guidelines.
Proficient in code versioning tools including Mercurial, Git, and SVN.
Knowledge of C-based libraries.
Familiarity with push notifications, APIs, and cloud messaging.
Experience with continuous integration
Tech @ Omuni, Arvind Internet:
● Our architecture is powered by 50+ microservices, all built on open-source stack
● Our systems process 1+ billion inventory updates a month
● We have best in class integration patterns for fault tolerance and resilience
● We design systems for SaaS offerings, we build for cloud and different form factor
● We have the coolest apps in fashion commerce by combining in-store and digital experiences
● We work on some complex programs involving integrating with disparate external systems
About the role:
Roles & Responsibilities
● Understand functional requirement, design and code
● Preparing high level design(HLD) and low level design(LLD) document
● Adhering to best practices, maintain quality of code and perform unit testing
● Coordinate with other stakeholders to deliver functionality
● Code checkin and code review for peers
● Performance monitoring of application using Firebase and other APM tools, performance tuning
using IDE tools
● Using CI/CD tools to push build to Testflight or other test environments
● Troubleshoot high priority issues
● Mentor junior resources
● Participate in sprint planning and scrum standup calls.
Ideal Candidate profile:
● Understanding of design patterns and MVVM, MVP architectures
● Design and build applications for the iOS platform.
● Proficient with Swift and Swift UI
● Familiarity with RESTful APIs to connect Android applications to back - end services
● Strong knowledge of iOS to build apps for different form factors
● Design, build, and maintain high performance, reusable, and reliable Swift code
● Help maintain code quality and performance monitoring
● Proficient understanding of code versioning tools, such as Git, CI/CD tools
● Experience with performance and memory tuning with tools
● Familiarity with apple push notifications
● Should be able to work in agile environment
● 3-5 year experience in IT with minimum 3 years in iOS app development, Flutter and Dart knowledge
would be great to have
● BTech in CS or any other stream
Responsibilities:
-
Design and build iOS mobile applications
-
Collaborate with cross-functional teams to analyze, design, and ship new features
-
Fully responsible for mobile app development in the team
-
Build and publish applications in app stores
-
Implement new technologies to maximize application performance
Qualifications:
-
Very good experience with Objective-C and iOS SDK
-
Experience in working with Telematics SDK is a plus
-
Experience with Geo APIs are mandatory
-
Good working knowledge in Cocoa Touch
-
Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and Core Text
-
Experience with memory management and caching mechanisms specific to mobile devices
- Strong working experience in IOS application development is a must. First-hand experience of native mobile apps using Swift must.
- Experience with Swift, RxSwift, Swift UI, Unit test.
- Strong system design and architecture skills - specifically for IOS. Curiosity to tinker around, explore new paradigms and strongest for continuous improvement. Strong problem-solving skills.
- Understanding of network connections, Rest API'sand scheduling. Strong knowledge about security standards (e.g. HTTPS) and privacy standards.
- Idea/experience of the unit and instrumentation testing in IOS. Optimizing app performance and memory consumption.
- Leveraging community libraries to efficiently complete development tasks.
- Debugging apps using simulators and related tooling.
- Persisting data for offline-first apps using databases such as Realm.
- Localizing apps to support multiple languages and regions, vernacular libraries and fonts.
- Familiar with Version control system such as GIT.
KeepTruckin is on a mission to modernize the trucking industry. With the leading fleet management platform, we are bringing trucks online and fundamentally changing the way freight is moved on our roads.We see our hard work rewarded in tangible ways every day and we believe that intelligence is most powerful when paired with humility. We're motivated by the opportunity to impact and improve every facet of a trillion-dollar industry that touches everyone's lives. KeepTruckin is proud to be a Forbes Cloud 100 company, a 2020 Career-Launching Company by Wealthfront and named a Forbes Best Startup Employer 2020.About the
Role:
As one of our first mobile engineers in Bangalore, this is a great opportunity to make a significant impact in designing and building our new KeepTruckin Fleet Manager Android app and as well as grow by working directly with experienced technology professionals with backgrounds from Silicon Valley companies like Google, Twitter, Facebook and Uber (to name a few). We are looking for candidates who have a familiarity with Java and Kotlin, and a good understanding of system architectures (MVC, MVVM, Redux) and a forward thinking mindset aimed at high readability (declarative) code, as well as identifying problems or bottlenecks before they become issues.
What You'll Do:
Develop from scratch our new Android KeepTruckin Fleet Manager AppWork with product team to refine feature specs, and work with cross functional teams like IoT, Embedded, Data Science/ML, Computer Vision & Motion teams to create fluid user experiences with interactive visualization for a multitude of data from these different teamsCommunicate with backend engineers about API requirements or refinements, and engage with the senior engineers for mentorship to learn & grow in your areas of interestAnalyze our user's data to identify bugs, and help support team to diagnose user problemsBe able to work as part of a small, tightly knit team
What We're Looking For:
2-4 years of experience working on Android apps with a deep understanding of Android SDKsProficiency in Java, Kotlin, Android lifecycle, custom views, database/persistenceAn understanding of Android UI/UX and application design paradigms. An appreciation and understanding of automated app testingKnowledge in RxJava2, Dagger2, and knowledge or interest in commercial vehicles/trucking is a plus!
Creating a diverse and inclusive workplace is one of KeepTruckin's core values. We are an equal opportunity employer and welcome people of different backgrounds, experiences, abilities and perspectives.Please review our Candidate Privacy Notice here. ( https://drive.google.com/file/d/1Xs7GivrHCj05XC6-mn6MsRGG3V5AcgZ5/view?usp=sharing )
We are looking for a skilled professional proficient enough in working on building apps on Android platform.
As a developer, you will be responsible for leading the development and launch of product features. You will have significant influence on our overall strategy by helping define these product features, drive the system architecture, and spearhead the best practices that enable a quality product.
Responsibilities and Duties
Develop, Deploy and Maintain mobile applications on Android.
Developing high performance personal and commercial applications with Push notification, location based services, social features.
Primary testing the applications and ensuring the programs and applications do not have glitches, errors, or low functionality.
Fixing bugs by collaborating with QA team members.
Understanding of configuration aspects of devices - Configuration utility, configuration profiles.
Required Experience and Qualifications
• Minimum 1 year of relevant experience in iPhone applications development.
• Ability to conceptualize and design mobile applications based on client need.
• Ability to lead and mentor a small team of developers.
• Ability to understand business requirements.
• Should be able to work independently
Job Type: Full-time








