We are looking for a React Native developer interested in building performing 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.
Skills :
- Firm grasp of the JavaScript (and TypeScript or ClojureScript)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)

About Oxysquad Technologies Pvt Ltd
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Job Profile: React Native Developer (2+ Years Experience)
Location: Kolkata
Work Mode: Work From Office
Experience Required: 2+ Years
Employment Type: Full-Time
Job Description
We are looking for an experienced React Native Developer with 2+ years of hands-on experience to join our mobile development team in Kolkata. The ideal candidate will be responsible for building high-quality, scalable, and performance-optimized mobile applications for Android and iOS platforms.
Key Responsibilities
- Develop and maintain cross-platform mobile applications using React Native
- Convert UI/UX designs into pixel-perfect mobile interfaces
- Integrate RESTful APIs and handle asynchronous data
- Optimize mobile applications for performance, stability, and scalability
- Implement state management using Redux, Context API, or other libraries
- Write clean, maintainable, and reusable code
- Debug, troubleshoot, and resolve production and performance issues
- Collaborate with backend developers, designers, QA, and product teams
- Participate in code reviews, sprint planning, and Agile ceremonies
- Publish and maintain apps on Google Play Store and Apple App Store
Required Skills & Qualifications
- 3+ years of experience in React Native
- Strong knowledge of JavaScript (ES6+) / TypeScript
- Hands-on experience with React Hooks and Functional Components
- Experience with Redux / Context API
- Strong understanding of mobile UI/UX guidelines
- Experience with REST APIs and third-party SDK integration
- Familiarity with Android Studio and Xcode
- Experience using Git for version control
Good to Have
- Experience with Native Modules (Android / iOS)
- Knowledge of Expo
- Experience with Firebase (Auth, Push Notifications, Analytics)
- Familiarity with CI/CD pipelines for mobile apps
- Understanding of app performance optimization techniques
Behavioral & Soft Skills
- Strong analytical and problem-solving skills
- Good communication and collaboration abilities
- Ability to work independently and meet deadlines
- Willingness to work from office in Kolkata
What We Offer
- Stable work-from-office role in Kolkata
- Opportunity to work on live production mobile applications
- Career growth and technical learning opportunities
- Supportive and collaborative work environment
Key Responsibilities
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.
Key Skills
1. Extensive knowledge of mobile app development. This includes the whole process, from the first line of code to publishing in the store(s).
2. Deep knowledge of mobile platforms on which the app runs, e.g., Android, iOS etc.
3. Proficient in HTML, CSS, Javascript, React, React Native, Node whichever language you use in the app.
4. Proficiency with writing automated tests in JUnit, Espresso, Mocha, Jest, Enzyme, XCTest, etc. depending on the libraries you use to test
5. Familiarity with RESTful APIs and mobile libraries for networking.
6. Familiarity with the JSON format.
7. Experience with profiling and debugging mobile applications.
8. Strong knowledge of architectural patterns—MVP, MVC, MVVM, and Clean Architecture—and the ability to choose the best solution for the app.
9. Familiarity with Git and Github.
10. Familiarity with push notifications.
11. Understanding mobile app design guidelines on each platform and being aware of their differences.
Design and Build sophisticated and highly salable apps using Flutter.
2. Translate and Build the designs into high quality responsive UI code.
3. Write efficient queries for core Data.
4. Use of Model-View-Controller (MVC) and Model-View-ViewModel-Controller (MVVM) architecture and developing maintainable, testable and functional software that meets product requirements.
5. Resolve any problems existing in the system and suggest and add new features in the complete system.
6. Follow the best practices while developing the app.
7. Use CI/CD for smooth deployment.
8. Document the project and code efficiently.
9. Manage the code and project on Git in order to keep in sync with other team members and managers.
10. Suggest new features and/or enhancements.
11. Maintaining software through product life cycle including design, development, verification and bug fixes.
12. Write tests for the App.
13. Knowledge of different state management libraries like BloC, GetX, Provider will be a plus point.
We are looking for a qualified React Native developer to join our Engineering team. Ultimately, you
should be able to design and build the next generation of our mobile applications.
What is expected of our App Developers?
1. Understand the healthcare context and identify key problems
2. Innovate, evaluate, and deploy various android and IOs Features that can solve complex healthcare needs
3. Ability to take extreme ownership 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 general process. An understanding of React Native best practices and a
commitment to following them.
4. Ability to create and maintain continuous integration and delivery of applications.
5. A positive mindset and can-do attitude.
6. Forensic attention to detail.
Qualifications:
1. Bachelor’s degree in CS/IS.
2. Experience with React Js, React Native, JavaScript including DOM Manipulation and
JavaScript object model.
3. Thorough understanding of React Native and its core Principles.
4. Hands on experience on React Native Framework at least 2 years.
5. Good Knowledge of HTML5, CSS.
6. Familiarity with code versioning tools (Such as Git, SVN or Mercurial)
7. Familiarity with RESTful APIs
8. Familiarity with modern front-end build pipelines and tools.
9. Experience with common front-end development tools such as Babel, Web pack, NPM etc.
10.Experience with Native Mobile app deployment on App store and google play store.
We are looking to self-driven individuals who aspire to be world class app developers and have
massive impact
in healthcare space
- Minimum 2 years of experience. Individuals with a higher degree of expertise will be considered for senior opportunities
- Minimum Bachelor Degree in Computer Science, Computer Engineer or related fields
- Experience working with and presenting summaries of large datasets
- Experience working with JavaScript , Reactnative and frontend frameworks
- Experience on system designs and architecture.
- Working experience with large, complex Enterprise dashboards is a plus.
- Passionate about innovating, learning new skills and technology
- Comfortable working on frontend and backend tasks is a plus
Currently, we are looking for engineers who are skilled, passionate, driven, and a wee bit crazy (yes, crazy works! ) to join our tribe. The small tweaks you make, the processes you alter, the experiments you run, and the business decisions you drive will have reverberating effects on our ability to add value to our customers and keep them coming back for more.
Responsibilities:
- Work on cutting edge technical systems and seek to do things no one else has done before.
- Work with a group of people who believe in the utmost transparency and ethical practices.
- Work with full autonomy and high ownership of outcomes
- Add value to our user's life • Evolve as a professional through a learning and challenging journey.
Requirements:
- 4+ years of overall work experience, and a minimum of 2 years of experience in Android development
- Excellent knowledge of Java, Kotlin and Android eco-system
- Experience in software engineering best practices and design principles
- Prior experience in working on scalable Android App • Capable of handling web service integration - RESTful, JSON, SOAP, XML
- A focus and passion for Mobile UI & UX to make apps exciting for the user
- Excellent debugging and optimisation skills
- Rapid prototyping skills for getting product feedback
- Understanding of product development lifecycle
- Experience in React Native is a bonus
Job Description for flutter developer
Role/Project Description Will be responsible for User Interface development of various android/IOS based mobile applications for HCIN clients and partners. The candidate will work in a global, highly innovative and agile environment made up both by talented youngsters and senior professionals.
Job Responsibilities:
- Design and develop high-volume, low-latency applications for mission-critical systems, delivering high-availability and performance
- Contribute in all phases of the development lifecycle: concept, design, build, deploy, test, release to app stores and support.
- Diagnose performance issues, fix bugs (including crashes and ANRs) to increase the functionality of the application
- Write well designed, testable, efficient code
- Ensure designs are in compliance with specifications
- Prepare and produce releases of software components
- Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review
- Collaborate with team members (product managers, developers, designers) to brainstorm about new features and functionalities.
Desired Profile:
- Experience required 1 year
- B. Tech, MCA, M. Tech degree in Computer Science Engineering or a related subject
- Proficient in Java/Kotlin programming
- Knowledge and experience in Flutter Framework and DART programming
- Hands on experience in using RESTful APIs
- Hands on experience in designing and developing microservices architecture and containers
- Object oriented analysis, UML and design using common design patterns.
- Hands on experience in development IDE Android Studio, Android SDK, Firebase Test Lab
- Experience with offline storage, threading, and performance tuning
- Familiarity with push notifications
- Familiarity with IOS integration with Flutter
- Experience using GitHub or similar environment
- Complete understanding of SDLC
- Experience with Agile development
- Experience with Material Design and Android UI design principles, patterns and best practices
- Good knowledge of adding third-party libraries
Role Description for the 3 month internship:-
• Create multi-platform apps for iOS & Android using Google's new Flutter development framework
• Strong OO design and programming skills in DART and SDK Framework for building Android as well as iOS Apps.
• Good expertise in Auto Layout and adding constraints programmatically
• Must have experience of Memory management, caching mechanisms., Threading and Performance tuning.
• Familiarity with RESTful APIs to connect Android & iOS applications to back-end services
• Experience with third-party libraries and APIs
• Collaborate with the team of product managers, developers, to define, design, & deploy new features & functionality
• Build software that ensures the best possible usability, performance, quality, & responsiveness of features
• Work in a team following agile development practices (Scrum)
• Proficient understanding of code versioning tools such as Git, Mercurial, or SVN, and Project Management tool (JIRA)
• Utilize your knowledge of the general mobile landscape, architectures, trends, & emerging technologies
• Get Solid understanding of full mobile development life cycle and make use of the same
• Help Develop and Deploy Good Quality UI
• Solid understanding of the full mobile development life cycle.
• Good written, verbal, organizational and interpersonal skills
• Unit-test code for robustness, including edge cases, usability, and general reliability.
• Excellent debugging and optimization skills
• Strong design, development and debugging skills.










