
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.
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

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- Strong proficiency in React Native and JavaScript (ES6+).
- Experience with Redux, Context API, or other state management tools.
- Familiarity with TypeScript and strong understanding of mobile app architecture.
- Knowledge of native build tools like Xcode and Android Studio.
- Experience with RESTful APIs and third-party libraries.
- Familiarity with GraphQL is a plus.
- Hands-on experience in implementing pixel-perfect designs and animations.
- Proficiency in using libraries like React Navigation, NativeBase, or Material-UI.
- Experience with testing libraries like Jest, Detox, or Appium.
- Strong debugging skills using tools like Chrome DevTools, Flipper, or similar.
- Experience deploying apps to the App Store and Google Play Store, including managing certificates and provisioning profiles
Job Description
As a React Native Developer at Marmeto, you will play a critical role in building high-performance, cross-platform mobile applications for iOS and Android. You will collaborate with UX/UI designers, backend engineers, and product stakeholders to deliver intuitive and scalable mobile experiences. This role demands a developer with a deep understanding of mobile architecture, native modules, and modern development best practices.
Skills:
- Minimum 4 years of hands-on experience with React Native for Android and iOS development.
- Strong proficiency in JavaScript, TypeScript, and ES6+ features.
- Solid understanding of React Native architecture, including Hooks, Redux/MobX, and Context API.
- Experience with native module integration (Android/iOS) and third-party libraries.
- Proficient in using React Navigation, AsyncStorage, and mobile design patterns.
- Familiarity with debugging tools like Flipper, Chrome DevTools, and React Native Debugger.
- Experience in publishing apps to the App Store and Google Play.
- Good understanding of mobile performance optimization and memory management.
- Proficiency with version control systems like Git.
Roles & Responsibilities:
- Design, develop, and maintain cross-platform mobile applications using React Native.
- Collaborate with UI/UX designers to implement pixel-perfect interfaces and interactions.
- Work closely with backend teams to integrate APIs (REST/GraphQL) seamlessly.
- Write clean, modular, and scalable code following best practices and design patterns.
- Troubleshoot, debug, and optimize mobile apps for maximum performance.
- Stay updated on emerging trends in mobile development and bring innovation into the team.
Requirements
Mandatory
- Should have built solutions/applications end-to-end, not just contributed as part of a larger team.
- Should envision continuing in a deep mobile development role 5+ years down the line.
- Strong command over JavaScript, TypeScript, and React Native internals.
- Experience working with Redux, React Hooks, and lifecycle methods in mobile contexts.
- Deep understanding of platform-specific limitations, capabilities, and mobile UI/UX standards.
Essential
- Proficiency with Git and collaborative workflows (e.g., branching, PRs).
- Familiarity with CI/CD for mobile.
- Understanding of offline storage, background sync, and performance monitoring.
Good to Have
- Knowledge of native development (Swift/Kotlin) to bridge native modules when needed.
- Exposure to tools like Figma, Sketch, or Zeplin for design collaboration.
- Experience with e-commerce platforms like Shopify, BigCommerce, or similar.
Job Role:
- 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.
- Maintain and write clean code to ensure the product is of the highest quality.
Responsibilities:
● Take end to end ownership of all products right from conceptualization till production.
● Develop cross-platform user-facing features using React JS.
● Drive major frontend architecture decisions along with Product Managers and
Engineering Head.
● Building reusable components and front-end libraries for future use.
● Translating designs and wireframes into high-quality code.
● Optimizing components for maximum performance across a vast array of
web-capable devices and browsers
Requirements:
● 6+ years of relevant experience in core frontend technologies (JS, React,
Redux,GraphQL)
● You're an engineer by heart and not just a developer.
● You're innovative and able to pitch ideas to your colleagues.
● You're able to work with Product Managers, Designers and call out things upfront
from an engineering perspective.
The ideal candidate will have experience in creating mockups to present to teams,
collecting feedback and creating a quality piece of work. This individual should be
comfortable with building sitemaps, wireframes and prototypes to provide project
manners and inevitably execute based on outlined criteria. This candidate should
have strong creative and design skills and be familiar with various design
technologies.
Responsibilities
· 1. Develop new user-facing features
· 2.Build reusable code and libraries for future use
· 3.Ensure the technical feasibility of UI/UX designs
· 4. Optimize application for maximum speed and scalability
· 5.Assure that all user input is validated before submitting to back-end Skills
And
Qualifications
Proficient understanding of web markup, including HTML5, CSS3 Basic
understanding of server-side CSS pre-processing platforms,
Proficient understanding of client-side scripting and JavaScript frameworks,
including jQuery
Should know advanced JavaScript libraries and frameworks,
such as AngularJS, ReactJS
Bachelor's degree in user experience, design or related field-(Btech/ BCA)
· Note: Every front-end developer is expected to have proficient knowledge of
JavaScript, while most front-end developers should know jQuery.
Strong communication, design and creative thinking skills Experience with
Adobe Pro, Photoshop and programming languages HTML, CSS and
JavaScript lea, UI developing.
Experience: 2 to 4 years
Preferred Candidate: Immediate Joiner
Location: Kolkata only Onsite
Compensation
As per the industry standard
- Expertise of UI framework - React/Redux, RXJS
- Experience with React Native is preferred
- Preferred experience with new generation of Web Programming - using Micro Service, REST/JSON, Component UI models
- Expertise with data visualization flow development along with usage of modern charting and graphical java script library
- Preferred experience with AWS RedShift or Postgress
- React/Redux, RXJS, HTML, CSS, Javascript (ES5, ES6), Data visualization and Chart Libraries
As a Front-end Developer, your responsibility would be to create visual elements that users see and interact within our web platform. This makes your role crucial for the success of the product. We are looking for an exceptional problem solver, with attention to details. You will be working closely with design, product management and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
You must take responsible actions in ensuring the application is optimised both in terms of technology and in delivering the best educational content.
Responsibilities:
- Build web platform for our live tutoring platform
- Creating interactive learning activities for K12 students
- Work on upcoming products
Requirements:
- Great programming skills
- Fundamentals of JavaScript and ES modules, new ECMASCRIPT concepts
- Experience in ReactJS web app development (1-4 years)
Brownie Points:
- Good HTML and CSS skills
- Experience in React-Native app development
- Ability to work in small teams and wear multiple hats
Ono Labs Private Limited is committed to providing equal opportunities without any discrimination on the grounds of age, ancestry, marital status, color, physical or mental disability, origin, nationality, political affiliation, religion, race, gender, sexual orientation, and any other characteristics protected by applicable law, regulations, and ordinances.
In this role, you will be responsible for developing and integrating UI
components using React.js, hooks, typescript, ES6 and redux.
Should be good in unit testing library like react testing library/enzyme and jest
Should have in-depth knowledge of JavaScript and OOPs concepts, excellent front-end
coding skills, and a good understanding of the integration of REST services.
Experience/Knowledge with node.js, express.js, mongodb and mongoose will be an added advantage.
Preferably with 3 to 5 year
What You Will Be Doing:
- Create highly responsive B2C web-app using a wide range of open source frontend and backend technology.
- Create single page applications using a wide range of javascript & cutting edge libraries/frameworks.
- Responsible for the full lifecycle of a project, including development, unit testing, system testing and change management.
- Research technical issues and provides recommendations to enhance JavaScript products.
- Manage/Lead a team of 10+ javascript fullstack developers to handle a wide range of projects across different products.
- Code reviews, Overall project estimations, Estimation reviews, Project planning.
- Interact with stakeholders for the development requirements gathering.
- Layout a technical career growth plan for the team members.
- Working with multiple projects.
What we are looking for:
- Bachelor’s degree in Computer Science or equivalent preferably from IIT,NIT & other premier institutes.
- Rockstar Javascript developer, who appreciates the intricacies of JS as well as passionate to follow new trends in JS.
- Experience with product companies.
- 9-12 yrs of software development on advanced JavaScript stack (Native Javascript, Asynchronous Request Handling, AJAX, HTML5, CSS3, etc).
- 2-4 yrs of experience in leading and mentoring a team.
- In-depth knowledge in ReactJS & NodeJS
- Proficiency in any other modern web frameworks will be a plus.
- A solid knowledge of advanced data structures & algorithms.
- Proficient in Computer Science fundamentals & object-oriented design.
- Solid understanding of cross-browser compatibility issues and ways to tackle those.
- Must possess a track record of building Single Page responsive UI.
- Experience with Databases such as NoSQL and any RDBMS will be a plus.
- Experience with transport protocols such as TCP, HTTP & WebSocket.
- Expressing and appreciating design patterns is a real addition.
- Critical of coding practices and development methodologies.
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