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I will develop mobile apps using flutter, kotlin, or native android
Karthikeyan P
About this gig
Need a professional mobile app built from scratch or an existing app improved?
I develop modern, responsive, and scalable mobile applications using Flutter, Kotlin, Java, and Native Android.
Whether you have an app idea, UI design, existing project, or need new features added, I can help turn it into a working mobile application.
What I can develop:
- Flutter mobile applications
- Native Android apps using Kotlin or Java
- Custom UI/UX implementation
- REST API & third-party API integration
- Firebase integration Authentication, Firestore, Notifications
- User authentication Login, Signup, OTP
- Payment gateway integration
- Push notifications & real-time updates
- Backend & database integration
- Admin dashboard integration
- Bug fixing and existing app improvements
- Performance optimization
- App deployment and release support
Why work with me?
- Clean and maintainable code
- Responsive and modern UI
- Scalable architecture
- Secure API integration
- Proper testing and debugging
- Clear communication throughout the project
I can work with Figma/UI designs, existing source code, APIs, or your complete app requirements.
Get to know Karthikeyan P
Karthikeyan P
Full Stack Web and Mobile App Developer
- FromIndia
- Member sinceSep 2026
- Avg. response time1 hour
Languages
Tamil, English
Full-Stack Web & Mobile App Developer specializing in Laravel, PHP, Next.js, React, Flutter, Node.js and REST APIs. I build scalable web apps, SaaS platforms, mobile apps and backend systems. I also work with AWS, PostgreSQL/MySQL, BLE and connected-device integrations, healthcare/HMS and payment workflows. I can help with new development, existing-app customization, bug fixing, API integration, databases and deployment. I focus on clean architecture, reliable solutions, clear communication and maintainable code.
My Portfolio
Other Mobile App Development Services I Offer
FAQ
Can you develop both Flutter and native Android apps?
Yes. I develop cross-platform applications using Flutter and native Android applications using Kotlin or Java, depending on the project requirements.
Can you work on an existing Flutter or Android app?
Yes. I can work with existing source code to fix bugs, add features, integrate APIs, improve performance and make required changes.
Can you integrate REST APIs and Firebase?
Yes. I can integrate REST APIs, authentication, Firebase services, push notifications and other backend services required by your application.
Can you develop both Android and iOS using Flutter?
Yes. Flutter can be used to develop applications for both Android and iOS from a shared codebase. The final scope depends on the application requirements.
Do you provide the source code?
Yes. Source code is included according to the selected package and agreed project scope.
Can you help publish my app?
Yes. I can provide technical assistance with Android and iOS build preparation and app store submission. You will need to provide your own developer accounts.
Do you provide app updates and maintenance after launch?
Yes. I can provide post-launch support for bug fixes, app updates, performance improvements, feature enhancements and technical maintenance. Ongoing maintenance can be discussed based on your requirements and handled through a suitable package or custom offer.
