
Job Description
- Architect, build and maintain excellent React Native applications with clean code.
Roles and Responsibilities
- Work as part of a small team to build React Native iOS / Android applications for clients
- Implement pixel-perfect UI's that match designs.
- Implement clean, modern, smooth animations and transitions that provide an excellent user experience.
- Integrate third-party API's.
- Release applications to iOS and Google Play stores.
- Work with native modules when required.
- Complete two week sprints and participate in sprint retrospectives and daily standups.
- Assist with building estimates.
- Interface with clients via Slack, Zoom, and email.

About MobileFirst Applications Private Limited
About
At MobileFirst, we build technology solutions to improve business processes of small & medium enterprises. In the last 5 years, we are privileged to build solutions for Fortune 100 Companies, globally renowned brands, SMEs, high growth startups & ambitious Entrepreneurs. Few of the solutions we have built are used at Volkswagen, NFL & NHL Teams, Taj Hotels, Arvind Group, and others.
About MobileFirst Applications:
MobileFirst is a leading app growth & full-stack development agency.
We build bespoke solutions on iOS, Android & Web Platforms. Our technology stack is Swift, React Native, Objective-C, Java, NodeJS, ReactJS, AngularJS & PHP.
MobileFirst's app growth engineering is a unique consulting & development service which helps clients in areas of DeepLinking, App Store Optimisation, Universal Linking, Smart Campaigns, Customer Churn, Facebook & Google Re-marketing, Customer LTV & Acquisition cost.
Visit: https://mobilefirst.in
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Job Description:
We are looking for a skilled React Native Developer to design, develop, and maintain high-performance cross-platform mobile applications for Android and iOS.
The ideal candidate must have strong command over React Native, TypeScript/JavaScript, and working knowledge of Kotlin (Android) and Swift (iOS) to build and integrate native modules when needed.
You will work closely with backend, design, and product teams to deliver seamless, fast, and stable mobile experiences for the ZestFindz ecosystem.
Key Responsibilities:
- Develop and maintain cross-platform mobile applications using React Native.
- Collaborate with design and product teams to deliver pixel-perfect, responsive UIs.
- Integrate REST APIs / GraphQL and handle authentication, caching, and error states efficiently.
- Implement and manage app state using Redux / Context API / Zustand.
- Optimize app performance, handle animations, memory leaks, and rendering issues.
- Build and integrate native Android (Kotlin) and iOS (Swift) modules where React Native limitations exist.
- Manage offline storage using SQLite / AsyncStorage / MMKV.
- Configure and manage Firebase services - Auth, Firestore, Push Notifications, Analytics.
- Handle deep linking, in-app navigation, and app lifecycle events.
- Deploy apps to Google Play Store and Apple App Store (with signing, provisioning, versioning).
- Work with DevOps to integrate apps into CI/CD pipelines (Fastlane / GitHub Actions / Codemagic).
- Write clean, modular, reusable code with proper documentation and testing.
- Debug, profile, and optimize performance for low-end devices and weak networks.
- Ensure security best practices - secure token storage, environment management, and data encryption.
Must-Have Skills:
- Strong experience in React Native (0.70+) and JavaScript / TypeScript.
- Solid understanding of mobile architecture patterns (MVC, MVVM, Flux).
- Knowledge of Kotlin (Android) and Swift (iOS) for native bridge creation and debugging.
- Experience with React Navigation, Redux / Context API / Zustand, and API integration (Axios / Fetch).
- Familiarity with Firebase, App Permissions, and Push Notifications (FCM/APNS).
- Good understanding of Android Studio, Xcode, Gradle, and Cocoapods.
- Ability to write clean, testable code with unit and integration tests.
- Working experience with Git / GitHub / GitLab CI/CD.
- Problem-solving mindset and ability to debug across full mobile stack.
Good-to-Have Skills (Bonus):
- Knowledge of native SDK integrations (Maps, Camera, Payments, etc.).
- Experience with React Query / GraphQL.
- Familiarity with Fastlane, Crashlytics, App Center, or Sentry.
- Understanding of UX principles and animation libraries (Lottie, Reanimated).
- Experience with OTA updates (CodePush) and App Store Optimization (ASO).
Basic requirements
1. Good understanding of react and react native.
2. Best practices in react along with knowledge of functional components.
3. Good understanding of hooks and other react patterns.
4. Solid understanding of basic programming concepts and data structures.
5. Experience with global state management like redux and context.
6. Using 3rd party libraries for rest api and other standard procedures.
7. Have experience writing react native code with typescript.
Good to have skills
1. Have worked on media intensive apps (video, images and audio).
2. Have experience with building high quality reusable custom components.
3. Experience with animation libraries like animated or reanimated.
4. Have a good understanding of TypeScript classes, interfaces, generic types,
and other typing patterns in TypeScript.
5. Experience with building and deploying apps to iOS App store/Google Play.
6. Have previous experience of working with firebase.
7. Have an eye for creating pixel perfect design with optimised animations.
8. Experience of working with realtime systems like socket.io
9. Fair understanding of how react native/native apps work under the hood and
how React ecosystem sits on top of native app architecture.
10.bonus points if you have previous experience with native android /iOS
development.
11. Double bonus points if you have created native bridges for android and iOS in react native before.
Other required qualifications
1. Minimum 1.5-2 years of relevant experience developing React applications.
2. Proven ability to work alone and with teams in a dynamic, multicultural
environment.
3. Strong oral and written communication skills in English.
4. Good understanding of documentation and able to write documentation of
given tasks.
5. Understand Agile base deployment process, take full responsibility for a given
task, and dedicatedly work based on given timeliness
6. Ability and interest in sharing knowledge, mentoring others, presenting work,
and reviewing the work of others.
Flutter JD:
Key Responsibilities: Collaborate with project managers and designers to understand project requirements and translate them into technical specifications.
Develop, test, and maintain Flutter-based mobile applications that are responsive, performant, and reliable.
Write clean, maintainable, and well-documented code.
Troubleshoot and debug application issues, ensuring smooth and efficient performance.
Continuously research and stay up-to-date with the latest trends and best practices in mobile application development.
Collaborate with cross-functional teams to define and implement new features and improvements.
Participate in code reviews and provide constructive feedback to peers.
Ensure the security and data privacy of the applications you develop.
Requirements:
Proven experience as a mobile app developer, with a strong portfolio of Flutter-based applications.
Proficiency in the Dart programming language.
Experience with the Flutter framework and its ecosystem, including state management and third-party libraries.
Knowledge of mobile app architecture patterns (e.g., MVC, MVVM, Redux).
Familiarity with RESTful APIs and integration of third-party services.
Strong problem-solving and debugging skills.
Excellent communication and collaboration skills.
Ability to work both independently and as part of a team.
Knowledge of version control systems (e.g., Git) is a plus.
Skills/Experience
Great interpersonal communication skills; Keen eye for spotting data trends; A keen grasp for newtechnology; Learn mobile development from highly experienced developer. Learn more than just programming. You will get to learn about product lifecycle. Product architecture. Mobile UI/UX and more Professional, able to interact with vendors/clients; Positive, can do attitude. Stay current with our latest insights
• Prior experience developing with Flutter is preferred
• Experience developing with Dart, whether with Flutter or for the web, is required.
• Experience with third-party libraries and APIs
of the software product development life cycle. This will include analyzing system
and user requirements, designing software flowcharts, creating user interfacing
applications (Web Or Mobile) , troubleshooting bugs, and running tests to improve
system functionality.
An ideal candidate would be someone who has proficiency in JavaScript or Flutter
frameworks, good analytical skills, the ability to anticipate issues and frame
remedial actions, and excellent teamwork skills.
What will you be doing?
● Write simple, efficient, and maintainable code.
● Design, develop, scale and maintain User Application written in JS or Dart.
● Manage individual priorities, deadlines, and deliverables.
● Validating the functionality and security of the application.
● Function well in a fast-paced, rapidly changing environment
● Ensuring best coding standards and practices to improve and maintain
quality.
● Meeting with the engineering and product team to discuss project definitions
and goals.
What will you need ?
● Bachelor/Master degree in CS or related field from a reputed college
● 2-6 years of experience in frontend software development
● Sound knowledge of JavaScript or Flutter technologies.
● Solid grip on the programming basics like DS and algorithms, OOPS.
● Understanding & experience with restful APIs and microservice
architecture
● Prior experience in start-ups or health-tech will be a plus
- Design and Build sophisticated and highly scalable apps using flutter.
- Build custom packages in Flutter using the functionalities and APIs already available in native Android and IOS.
- Translate and Build the designs and Wireframes into high quality responsive UI code.
- Write efficient queries for core Data.
- Explore feasible architectures for implementing new features.
- Resolve any problems existing in the system and suggest and add new features in the complete system.
- Suggest space and time efficient Data Structures.
- Follow the best practices while developing the app and also keeping everything structured and well documented.
- Document the project and code efficiently.
- Manage the code and project on Git in order to keep in sync with other team members and managers.
- Interact with the Product Manager to help understand end-user feedback.
- Ensure security guidelines are always followed while developing the app.
- Suggest new features and/or enhancements.
- Maintain software through product lifecycle including design, development, verification and bug fixes.
- Resolve all the bugs in a timely manner.
- Execute app verification protocol.
- Follow company policies and quality procedures to ensure quality product deliverables.
- If you have experience with Bluetooth Low Energy (BLE) based devices and related applications please highlight the same in your resume
We are looking for an experienced Kotlin/Flutter Developer who will join our talented software team that works on mission-critical applications. Your duties will include managing Flutter (Android, iOS) application development while providing expertise in the full software development lifecycle, from concept and design to testing.
You should have good experience in building high-performing, scalable, enterprise-grade applications and be able to write clean code and ensure your programs run properly. We also expect you to be passionate about building software and perform well working in a team, along with developers, engineers, and web designers.
Developer Responsibilities Are
- Design and develop high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
- Create well designed, testable, efficient code
- Participate in all phases of the development life-cycle
- Assist in the preparation and production of releases of software components
- Ensure designs are in compliance with specifications
- Investigate alternatives and technologies and present them for architectural review, in order to support continuous improvement
• Build custom packages in Flutter using the functionalities and APIs already available in native Android and IOS.
• Translate and Build the designs and Wireframes into high-quality responsive UI code.
• Write efficient queries for core Data.
• Use of Model-View-Controller ( MVC) and Model-View-ViewModel-Controller (MVVM) as it relates to designing, developing architecture and developing maintainable, testable and functional software that meets product requirements.
• Explore possible architectures for implementing new features.
• Resolve any problems existing in the system and suggest and add new features in the complete system.
• Suggest space and time-efficient Data Structures.
• Follow the best practices while developing the app and also keeping everything structured and well documented.
• Use CI/CD for smooth deployment.
• Document the project and code efficiently.
• Manage the code and project on Git in order to keep in sync with other team members and managers.
• Communicate with the Project Manager regarding the status of projects and suggest appropriate deadlines for new functionalities.
• Ensure security guidelines are always followed while developing the app.
• Validate the cloud system to ensure any new changes do not compromise the security of the backend server.
• Suggest new features and/or enhancements.
• Consulting with our customer-facing representatives about software system design and maintenance.
• Interact with the Clinical Specialists and Product Manager to help understand end-user feedback. • Maintaining software through product lifecycle including design, development, verification and bug fixes.
• Connect regularly with the Quality Assurance Specialist to deliver a stable app.
• Resolve all the bugs reported by the Quality Assurance Specialist in a timely manner. • Perform time profiling and memory leaks assessment.
• Execute app verification protocol.
• Write tests for the App.
• Following company policies and quality procedures to ensure quality product deliverables.
Requirements: Must Have:
• Flutter: To build cross-platform mobile apps for Android, IOS and Web.
This should include from making responsive UIs to efficiently query data and also manage states in an optimized manner.
• Native Android and IOS: To build custom Flutter Packages.
• Firebase: Should have experience with Cloud Firestore, Push Notifications, Cloud Functions and Analytics.
• Adobe XD: Should know how to use Adobe XD to use the design file and use it to build the app.
• Git: To manage and collaborate in different projects with the rest of the team.
Good To Have: • Angular • Bootstrap • JavaScript
Requirements:
Support the entire application lifecycle (concept, design, test, release and support) on both Android and iOS
- Build a framework as the application grows so our Apps and SDKs are unanimous.
- Produce fully functional mobile applications writing clean code
- Gather specific requirements and suggest solutions
- Troubleshoot and debug to optimise performance
- Design interfaces to improve user experience
- Liaise with Product team to plan new features
- Ensure new and legacy applications meet quality standards
- Stay up-to-date with new technology trends
- Work with latest Security protocols and data transfer optimisations
- Proven work experience as a Mobile developer with 3 - 5 years of experience.
- Must be proficient in at least one programming language from Java, Swift & Objective C and must be willing to learn the other two.
- Experience with third-party libraries and APIs
- Familiarity with OOP design principles
- Excellent analytical skills with a good problem-solving attitude
- Ability to perform in a fast paced team environment
- Strong understanding of in-device security
Preferences:
If you have experience Building apps for fast-growing startups
- If you have hands-on experience on iOS and Android both
- If you have experience working with Flutter.
Note:Our Android application is being written in Java
and iOS app in Objective C and Swift.
We offer a suite of memberships and subscriptions to spice up your lifestyle. We believe in practicing an ultimate work life balance and satisfaction. Working hard doesn’t mean clocking in extra hours, it means having a zeal to contribute the best of your talents. Our people culture helps us inculcate measures and benefits which help you feel confident and happy each and every day. Whether you’d like to skill up, go off the grid, attend your favourite events or be an epitome of fitness. We have you covered round and about.
- Health Memberships
- Sports Subscriptions
- Entertainment Subscriptions
- Key Conferences and Event Passes
- Learning Stipend
- Team Lunches and Parties
- Travel Reimbursements
- ESOPs
Thast what we think would bloom up your personal life, as a gesture for helping us with your talents.
Join us to be a part of our Exciting journey to Build one Digital Identity Platform!!!











