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I will develop native mobile android app with kotlin, flutter and rest API integration
Stephen
About this gig
Is your Android app crashing, getting rejected on Google Play, or failing to sync with your backend? Many startups and SaaS founders lose users due to poor performance, bad UI, or unstable API integration. You need a native Android app that runs smoothly on all devices, scales securely, and meets Play Store guidelines from day one. I develop high performance native Android apps using Kotlin and REST API integration that are optimized, secure, and built to convert users into loyal customers.
I solve common Android challenges:
- Device fragmentation and screen compatibility
- App crashes, lag, and battery drain
- Google Play policy compliance
- Complex REST API and Firebase integration
- Secure user authentication
What You Get:
- Native Android app with Kotlin
- Clean Material Design UI/UX
- REST API and JSON integration
- Firebase auth, database, push notifications
- Gateway and in-app purchases
- Admin and user dashboards
- Real-time data sync
- Play Store submission support
Tech Stack:
- Kotlin, Android Studio
- Jetpack
- Firebase
- RESTful APIs
- MVVM
Launch your Android app with confidence, performance, and scalability. Send a message now and let's build an app your users will trust and use daily.
Get to know Stephen
Stephen
Expert Mobile App Developer for iOS, Android And Flutter Apps
- FromGermany
- Member sinceMar 2026
- Avg. response time1 hour
Languages
English, German, Italian, Spanish
Hi, I’m Stephen, a skilled mobile & web app developer with several years of experience building high performing digital products. I specialize in iOS app development, Android app development, custom CRM systems, and custom web applications. I help businesses solve problems like slow workflows, poor user experience, and lack of scalable systems by building fast, secure, and user-friendly solutions. I work with tools like Flutter, Swift, Kotlin, React, Node.js, Firebase, and MongoDB. If you need a reliable developer who delivers clean, scalable solutions, message me today.
Other Mobile App Development Services I Offer
FAQ
Do you develop fully native Android apps using Kotlin?
Yes. I build fully native Android apps using Kotlin and modern Android architecture to ensure high performance, security, and long-term scalability across all devices.
Can you integrate REST APIs or connect my existing backend?
Yes. I integrate RESTful APIs, third-party services, Firebase, and custom backends to enable real-time data sync, authentication, payments, and advanced app features.
Will my Android app be ready for Google Play submission?
Yes. I follow Google Play policies and Android guidelines to ensure your app meets compliance standards and is ready for successful Play Store submission.
Can you build an MVP for my startup or SaaS app?
Yes. I specialize in startup MVP development, scalable SaaS-based Android apps, and business solutions designed for growth and future feature expansion.
Do you provide source code and post-launch support?
Yes. You receive clean, well-structured source code with documentation, plus post-launch support to ensure smooth performance and future updates.
