Senior Android Developer (java/Kotlin)

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.

Technical Skills Required

• Expert with BSPs and use of Peripheral Device Drivers, on Android and Linux Operating Systems

• Expert with device boot for speed and absolute reliability on headless devices
• Expert allocation/efficient use of operating infrastructure: memory, CPU, I/O, and serial communications
• Expert full stack application development on Android and Linux Operating systems:
• Java, Kotlin, JS, C/C++, ---- a plus to have Python
• Expert use of various build and debug tools for Android and other Operating Systems
• Skilled at architecture and implementation of custom algorithms and rules engines using onboard sensors for industrial applications: ex: fall detect, collision avoidance, man down, alerts
• Skilled with battery life optimizations
• Skilled with implementation of user interfaces for devices based on requirements 
• Skilled with Sensor Integration in Android or other OS framework (Linux, RTOS)
• Skilled with device configuration management
• Experience to integrate and tune camera and audio subsystems for VOIP and Video calling
• Able to port and integrate from/to one chipset to another
• Able to support device software across product life cycle
• Understanding of enterprise grade application requirements, networking and network security
• Experience with application/device diagnostics and self-healing configurations for enterprise grade solutions
• Experience with secure over the air software/firmware upgrades, device configuration and management from network server
• Experience with design and support for factory provisioning and test

About TrueFan

TrueFan is a celebrity-fan experience platform that enables fans to connect with their favorite celebrities. The business runs on a mobile application where fans compete in an online quiz contest designed on the life of their favorite celebrity (their movies, trivia, facts, etc.) and the winners get a personalized video message from them. The idea is to provide millions of fans an opportunity to fulfill their lifelong dream of interacting with their favorite celebrity while keeping it simple, passion oriented, and engaging for them.

TrueFan is founded by ex-IIT-SRCC alumni and is backed by marquee investors including Ronnie Screwvala, Mayfield Fund, and Saama Capital.

For more details: visit https://www.truefan.in/" target="_blank">https://www.truefan.in/

Job Description

 Job: Full time
Location: Gurugram(Delhi NCR)

Budget: 10 - 30 LPA

We are looking for a React Lead interested in building performant mobile apps on both the iOS and Android platforms. You will be responsible for architecting and building these applications, as well as leading and coordinating with the teams responsible for other layers of the product infrastructure. Building a product is a highly collaborative effort, and as such, a strong team player with a commitment to perfection is required.

Responsibilities

• Build pixel-perfect, buttery-smooth UIs across both mobile platforms.
• Leverage native APIs for deep integrations with both platforms.
• Diagnose and fix bugs and performance bottlenecks for performance that feels native.
• Reach out to the open source community to encourage and help implement mission-critical software fixes -React Native moves fast and often breaks things.
• Maintain code and write automated tests to ensure the product is of the highest quality.
• Transition existing React web apps to React Native.

What does the core role include?

• Leading a team of Developers to discuss user interface ideas and applications.
• Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
• Designing stateless components in React Native
• Contributing in all phases of the development lifecycle
• Working with the developers to create and maintain a robust framework to support the apps
• Working with the developers to build the interface with a focus on usability features
•  

What else can you expect in the role?

• Prepare and produce releases of software components
• Optimizing performance for the apps
• Problem-solving skills, analytical mind, and positive attitude
• Ability to think from end users perspective and focused on improving the overall product experience.
• Deliver across the entire app life cycle concept, design, build, deploy, test, release to app stores and support
•  

What can fetch you brownie points?

• Hands on experience with React Native is required
• Hands-on experience in React Native APIs, ReactJS, Javascript, ECMAScript (OOJS) and JSX.
• Strong understanding of JavaScript ecosystem
• Hands on experience on Android in creating Hybrid / Native applications
• Demonstrable UI/UX experience on a large-scale app.
• Thorough understanding of React Native development tools like IDEs (Nuclide, Atom, Sublime Text, or Visual
• Good knowledge of JS frameworks like ReactJS is a plus.

Hybrid Apps,React Native, Native iOS and Android Architecture understanding.

Visit Us - https://www.truefan.in/" target="_blank">https://www.truefan.in/

A Product based company is looking out for software engineers in the following categories.
If your profile matches any of the skills&experience categories and you are looking for a change,  Salary won't be a constraint for the right candidate

Category : 0 to 2 years of experience in mobile applications development for android or iOs platforms.

Responsibilities:
1. Understanding the scope of work
2. Working with the design, programming & testing team on project estimates & timelines
3. Coordinate with team to build assets to be used within the mobile application
4. Build Application static flows using React Native with Redux
5. Integrate JSON web services
6. Working with the tester to fix bugs reported by the testers
7. Building and deploying the application to the app store

Requirements:
1. Understanding of the Mobile Application Development lifecycle
2. Hands-on experience with React Native
3. Experience with Redux or Flux or MobX
4. Understanding of Advanced JavaScript – ES6
5. Understanding of Flexbox
7. Understanding of iOS/Android module integration
8. Deploying iOS and Android apps on Apple Appstore and Android Play Store.
9. Ability to work in an Agile environment

About the company

Anaxee Digital Runners is building India's largest last-mile verification & data collection network of Digital Runners (shared feet-on-street, tech-enabled) to help Businesses & Consumers reach remotest parts of India, on-demand.

Sounds like a moonshot? It is. Already serving 11000 pin codes (57% of India) | Website: www.anaxee.com

Check out our company pitch (6 min video) to understand the goal - https://www.youtube.com/watch?v=7QnyJsKedz8

Job Role

We are looking for a lead Android developer who will own our mobile app and take it to extreme levels of performance, utility, and stability. You should be excited to work on a unique product, solving a unique problem for Bharat.

Job Location: Indore | Full Time | Experience: 2.5 yrs & above | Salary ∝ Expertise | Rs.2.4L ~ Rs.7.5L |

Responsibilities

#Design and build advanced applications for the Android platform.

#Collaborate with cross-functional teams to define, design, and ship new features.

#Work with outside data sources and API-s.

#Unit-test code for robustness, including edge cases, usability, and general reliability.

#Work on bug fixing and improving application performance.

#Continuously discover, evaluate, and implement new technologies to maximize development efficiency.

#Collaborate with PMs, designers, and QA to create a great experience for our customers.

Key Competencies

#1-3 years of hands-on experience building Android apps in Kotlin/ Java.

#In-depth understanding of Android libraries available to developers as well as with third-party libraries. #Good knowledge of the network layer on Android.

#Good understanding of Android fundamentals - an end to end app development and creating custom components. Well versed in Android performance

#Strong communication skills and ability to work within a team to achieve set targets and deadlines.

#Understanding of XML/JSON, experience using Mysql & Git

#Understand testing methods and app release process

#Having knowledge integrating third-party plugins within the application.

Your application should include:

#Details about applications you have previously worked on

#A GitHub or stack overflow profile if you have one.

What we offer

#Competitive salary

# Startup Flexibility

#Great working atmosphere in a comfortable office

#And an opportunity to get associated with a fast-growing VC funded startup