We are building a new app in vernacular languages in the ed-tech domain. Looking for highly skilled React Native + Android frontend engineers to build the product with A player's team.
We are funded by a leading VC in the country.

About Leaf Innovation Pvt Ltd
About
LEAF is safety technology company started from February 2015 with the mission to solve the problem of human safety by disrupting the largely unorganized security market. LEAF launched their first product Safer, a smart safety wearable in 2015 to solve the problem of women safety which was sold in more than 25 countries. LEAF was a part of Prime Minister Modi's delegation to silicon valley as the Top 10 Innovators of India. With first Indian company to win prestigious Million Dollar X Prize Award at United Nations, Leaf is on the mission to make Billion people safe.
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We are looking for a Mobile App Developer for one of the leading TMT bar manufacturers and exporters in India.
Please find below details for your reference :-
Role - Mobile App Developer
Exp - 3 to 8 years
Job Location - Kolkata
About the Company :-
Our Client is one of the leading TMT bar manufacturer and exporter in India. It is a well known group that achieves a turn over of 3000 Cr per annum. The group is setting a construction & architecture oriented omni channel B2B & B2C platform.
Roles & Responsibilities:
- 3-7 yrs of 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 the 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 purchase alternatives.
Requirements :-
- Extensive knowledge about 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
Proficiency in the standard Android tech stack - JAVA/Kotlin
Good knowledge of design patterns, MVVM, Dependency Injection and more
Restful API, JSON Parsing, Retrofit Network Libraries
Strong knowledge of Android UI design principles, patterns, and best practices
Experience with offline storage, threading, and performance tuning
Excellent Android technical issue diagnosis and problem solving skills
GOOD TO HAVE
Hilt
Coroutine
Clean architecture
Excellent knowledge of UI animation and transition
- 3+ years proven work experience as a Mobile developer.
- Experience using web services (HTTP, REST, SOAP) using JSON, API and API Framework) .
- Good knowledge of object-oriented design patterns and Multi-threading concepts
- Good knowledge of the SQLite database and the Google Play Services like Push Notifications (fcm/sns)
- Strong mobile UI design (multi-screen resolutions), coding, support and maintenance
- Knowledge of HTML5, Bootstrap, JavaScript,
- Experience with third-party libraries and APIs (like Facebook, Twitter, etc.)
- Proficient iOS and Android mobile app experience are a plus
- In-depth knowledge of at least two Framework/Libraries like React Native / Ionic / Framework7 / Aurelia / PhoneGap / Flutter and angular / react / vue / Mobile Angular UI/ Kendo UI.
- Knowledge of bench marking and optimization
- Mandatory : self sufficient developer and must have prior experience of hybrid development [atleast 3 projects]
Job Description
We are looking for a React Native developer 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 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.
- Firebase and cloud function expereince would be huge plus
Skills
- Firm grasp of the JavaScript (and TypeScript ) language and its nuances, including ES6+ syntax
- Knowledge of (functional or object-oriented) programming
- Ability to write well-documented, clean Javascript code
- Rock solid at working with third-party dependencies and debugging dependency conflicts
- Familiarity with native build tools, like XCode, Gradle (Android Studio, IntelliJ)
- Understanding of REST APIs, the document request model, and offline storage
- Experience with automated testing suites, like (Jest or Mocha)

Good to have :
- Knowledge of Retrofit or Volley
- Knowledge Glide or Picasso
- Knowledge of Dagger, Hilt or Koin
- Understanding of major app architecture patterns
- Knowledge of Jetpack libraries
- Knowledge of Google Play Services
- Knowledge of Firebase Services
- Knowledge of Android Architecture Components
- Experience in Unit tests
- Experience in Instrumentation tests
- Understanding of REST APIs
- Understanding of memory management tools
- Understanding of performance monitoring tools
- Exposure to UI/UX best practices
Great to have:
- Experience with modularized apps
- Experience in Flutter/React-Native
- Experience in Design Systems
- Understanding of localization/internationalization
- Strong drive to learn and grow as the platform evolves
Job Description
We are looking for an Android developer responsible for the development and maintenance of applications aimed at a vast number of diverse Android devices. Your primary focus will be the development of Android applications and their integration with back-end services. You will be working along-side other engineers and developers working on different layers of the infrastructure. Therefore, commitment to collaborative problem solving, sophisticated design, and creating quality products is essential.
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 APIs
- 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
Requirements
- BS/MS degree in Computer Science, Engineering or a related subject
- Proven software development experience and Android skills development
- Proven working experience in Android app development and
- Have published at least one original Android app
- Experience with Android SDK
- Experience working with remote data via REST and JSON
- Experience with third-party libraries and APIs
- Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
- Solid understanding of the full mobile development life cycle.
2. Experience of integrating any of the SDKs or third party libraries.
3. Knowledge of Android Software design patterns, Android/Media Frameworks.
4. Experience with NDK and JNI
5. Basic knowledge of C & C++ language/libraries (optional)
About the Role:
Are you a talented & enthusiastic Android development expert with a love for mobile based technology and Open-Source communities? Would you like to work on a project with large social impact? Are you experienced with Databases on Android, creating developer APIs and complete Android applications? Are you comfortable leading a small team and interacting with stakeholders from customers and outside stakeholders? Then we would like to hear from you!
Key Responsibilities:
- Take part in the development and enhancement of an Open-Source SDK
- Be both an individual contributor with hands-on development responsibility, as well as a mentor and lead for a small developer team
- Contribute to the Open-Source community interaction, including participation in the discussion forums
- Review code contributions, review pull requests
- Create and maintain the documentation for the SDK
- Design and development a usable and functional Android reference app
- Hands-on Android development, including feature development, troubleshooting, debugging, problem solving and bug fixing
- Design and run your own unit test cases, integration test cases and test automation
- Analyze new requirements, investigate feasibility, suggest implementation options and estimate efforts timeline, dependencies and risks
- Collaborate closely with other development team members, including some being located at other parts of the world
Required Skills:
- 9+ years of experience in the software development industry
- 5+ years of experience in Android development
- 5+ years of experience in Java and/or Kotlin, with strong programming and software engineering skills
- Good understanding of Android related programming patterns and OS facilities, including activities, fragments, views, lifecycles and UI components
- Experience with SQLite database development
- Excellent communication skills, especially written
- Experience in creating software architecture and design document, as well as externally-focused technical documentations
- Readiness to work in a global team with contributors from different backgrounds, skills and locations
- Experience in leading small technical teams
- Bachelor’s degree in Software/Computer Engineering, Computer Science or related field, or comparable relevant experience
Preferred Bonus Skills:
- Experience in Design and Implementation of RESTful APIs
- Experience in Database design and implementation
- High proficiency in Kotlin, including multi-threading and synchronization (Kotlin coroutines)
- Experience in Open-Source development
- GitHub experience (Continuous Integration, GitHub routines)
- Real-life experience with mainstream commercial-grade mobile apps used by a broad user base (please provide links to app listings)
- Experience with Jetpack libraries (fragment library, recycler view)
- Familiarity with Java 8 libraries such as Java Time
- Hands-on experience in the Agile/Scrum development process
- Good understanding of OOPS concepts, design patterns, algorithms and data structures
- Good understanding of Material Design Language and human interface guidelines
- Experience with integrating mobile applications with cloud services

