10+ years in mobile development. Flutter, Swift, Objective-C, Kotlin, Java.
✅ OOP, FRP, Protocol Oriented Programming, Reactive Programming
✅ Architecture Patterns: MVC, MVP, MVVM, Viper, Clean Swift, RxSwift, RxJava, GAA
✅ Understanding & ability to leverage iOS and Android features
✅ JSON, REST API
✅ Custom transition and animation
✅ Build chat applications
✅ Git;
✅ Agile Methodology
✅ Friendly, Flexible, Punctual, and Professional
✅ Working on iOS and Android apps since 2011
✅ Fluent English
✅ 9000+ hours billed on Upwork
✅ Worked with successful startup companies
✅ 100% Job Success
✅ Agile Methodology
✅ $300,000+ billed
Native App Development
Java
Objective-C
Mobile App Development
Android App Development
iOS Development
Stepan K.
Tbilisi, Georgia
$50/hr
5.0
10 jobs
I help teams design and ship mobile applications for Android and iOS. My core background is native Android (Kotlin, Java), and cross-platform (Flutter & React Native).
I've delivered 20+ commercial apps across fintech, social, maps, logistics, and entertainment. I cover the full cycle: architecture, feature development, testing, performance optimization, and post-release support.
🎯 What I work on:
- New apps from scratch
- UI/UX implementation
- Architecture improvements
- Crash fixes & stability
- Release automation
- Firebase/Analytics integration
- API/backend integration
- AI integration
🛠 Architecture: MVVM, MVP, Clean Architecture
🧩 Technologies and Libraries:
- Android: Kotlin, Java, Jetpack Compose, Android SDK, Dagger/Hilt, Room, Retrofit, OkHttp, Coroutines, Flow
- Flutter: Dart, BLoC, Provider, Riverpod, GetX
- React Native: JavaScript, TypeScript, Redux, Expo
- Firebase: Crashlytics, Analytics, AdMob, A/B testing, Cloud Messaging
- Testing: JUnit, Mockito, Espresso, Robolectric
- Git: GitHub/GitLab, Bitbucket, Mercurial
🤖 How I use AI
I use AI as a productivity tool to speed up repetitive engineering work, but I never deliver raw AI-generated output.
I focus on scalable, maintainable, and high-performance applications, delivering projects that meet both user expectations and business goals. If you are looking for someone who can build Android features or improve app quality - contact me.
Kotlin
Android SDK
Object-Oriented Programming
Android
MySQL Programming
Android App Development
Mobile Development Framework
Java
Mobile App Development
Giorgi K.
Tbilisi, Georgia
$60/hr
5.0
5 jobs
⭐ Top Rated | 100% Job Success | Senior Mobile Engineer with 15+ years of experience
Are you looking for a reliable developer to turn your app idea into a finished, working product? I build high-quality, scalable mobile apps for Android and iOS, backed by secure backend systems — and I deliver the whole stack myself.
With 15+ years of software engineering, I specialize in full-cycle mobile development. My expertise covers:
✅ Native Android — Kotlin & Java, Jetpack Compose, MVVM, clean architecture
✅ Cross-platform apps — Flutter (Android + iOS from one codebase)
✅ Backend — Spring Boot, REST APIs, JWT auth, PostgreSQL, Docker
✅ Secure & encrypted apps — end-to-end encryption, SQLCipher, privacy-first
✅ Augmented reality — ARCore image recognition & tracking (5★ rated on Upwork)
✅ On-device AI / ML — TensorFlow Lite, image classification, real-time camera
✅ Real-time audio — low-latency DSP, recording, waveform, music apps
✅ Delivery & marketplace platforms — customer + driver + admin + backend
What you get working with me:
• Clean, documented, maintainable code — and full ownership
• Clear communication and fast responses
• Production-ready quality: proper error handling, security, no shortcuts
• One developer for both frontend and backend — no coordination overhead
From a single feature to a complete platform with its own backend, I deliver projects end to end. Whether you have an idea, a prototype, or an existing app that needs to scale — I can help.
📩 Message me with your project and I'll reply with a clear plan, timeline and honest advice. Let's build something great.
Kotlin
Android App Development
Flutter
Java
Spring Boot
JetPack
REST API
Firebase
PostgreSQL
Mobile App Development
Dart
API Integration
iOS Development
Android
Software Development
AI Bot
AI Chatbot
AI App Development
Nika K.
Tbilisi, Georgia
$75/hr
5.0
30 jobs
I build and rescue mobile apps that ship — 12+ years in native iOS (Swift, SwiftUI, UIKit) and 4+ years in Flutter, with production apps in fintech, gambling, crypto, and transit.
What makes me different from most Flutter developers: I shipped native first. Platform channels, native modules, App Store review quirks, performance profiling — the places where Flutter-only developers get stuck are where I'm strongest.
RECENT WORK:
Architected a Flutter gambling app from scratch (BLoC, multiple payment gateway integrations, Firebase) for iOS and Android
Led an iOS chapter of 7 engineers at one of Georgia's largest banks — SwiftUI at scale, MVVM+Coordinator architecture, modular 2FA system
Built and shipped a real-time transit app for the City of Ottawa to both the App Store and Google Play from a single Flutter codebase
Developed a crypto wallet with NFT ticketing, Web3 logins, and biometric authentication
Maintained and hardened a high-load iOS betting app for a major UK gambling brand
WHERE I'M MOST VALUABLE:
Flutter apps that need to feel truly native on iOS
Migrating native iOS/Android apps to Flutter or Kotlin Multiplatform
Rescuing troubled codebases — clean architecture, testing, CI/CD (Fastlane, GitHub Actions, Bitrise)
Launch-phase work: stabilization, performance, App Store submission and review
Kotlin
Flutter
Dart
Swift
SwiftUI
UIKit
iOS Development
iOS SDK
Android App Development
Firebase
GraphQL
REST API
CI/CD
Fastlane
Payment Gateway Integration
Apple Xcode
Mobile App Development
In-App Purchases
API Integration
Temur Z.
Gori, Georgia
$14/hr
4.9
15 jobs
🚀 Need a complete mobile solution from idea to launch? I’m a seasoned Android developer with 6+ years of experience, backed by a skilled team including an iOS developer, backend engineers (PHP, Python), and a creative UI/UX designer. Together, we deliver end-to-end app development — from wireframes to deployment — ensuring speed, scalability, and stunning user experience.
Whether you need a feature-rich Android app, a cross-platform mobile product, or a robust backend API, we’ve got you covered. Our approach focuses on clean architecture, efficient code, and pixel-perfect design so your app is not only functional but also unforgettable.
We specialize in:
- Android app development (Java/Kotlin)
- iOS app development (Swift, SwiftUI)
- Backend APIs (PHP Laravel, Python Django/Flask/FastAPI)
- UI/UX design (Figma, Adobe XD)
- Integration with payments, maps, IoT devices, AI models
✅ Clear communication
✅ Agile project management
✅ On-time delivery
Let’s turn your idea into a product your users will love.
Kotlin
Mobile App Development
App Development
Android
Java
Flutter
React Native
Smartphone
iOS
Swift
SQLite
PHP
SQL
Firebase
MySQL
Sergey F.
Batumi, Georgia
$25/hr
5.0
8 jobs
🔥 Do you need to build a high-quality Mobile App that brings real Revenue — not just downloads? 🔥
✔️ I Develop Mobile Apps designed to maximize your chances of Success.
✔️ I have a background in Product Management. I don’t just write code — I build Businesses.
✨ MVP Strategy: I help you define the core features that validate your idea without wasting time and budget on the wrong direction.
✨ Product-First Approach: My development process gives you the exact instruments you need to test your hypotheses in the real market.
I develop cross-platform and native iOS and Android applications using React Native, TypeScript, Swift / SwiftUI / Kotlin.
I specialize in subscription-based apps, combining strong engineering skills with deep product growth expertise.
💡 My focus areas include:
- AI-powered apps
- Productivity tools
- Utilities
- Health & fitness apps
- Trackers
- Lifestyle
- Business applications.
💡 I’m a Senior Mobile Developer with 10+ years of experience in iOS/Android development and a proven track record in building and scaling mobile applications with subscriptions. My focus is not just on code — I help you create a profitable mobile product that users love and that meets all App Store and Google Play requirements.
💡 As a Growth expert, I can advise how to increase app engagement, optimize retention, and grow your MRR. Whether you’re launching a new mobile app or improving an existing one, I can guide you through development, monetization, and analytics setup.
🏆 My achievements:
- 10,000,000+ app users
- 100,000+ App Store subscriptions
- 99% crash-free rate
- Trial conversion rate — up to 15%
- 1st day retention rate — up to 40%
🎓 My approach:
- Agile/SCRUM development for fast feedback
- Data-driven decisions using Amplitude / AppsFlyer
- Subscription analytics via Adapty / RevenueCat
- Clean and scalable code in TypeScript, following SOLID principles
- Clear, structured delivery process and transparent communication
You’ll get:
- A stable, scalable Cross-Platform app ready for the App Store or Google Play
- Advanced analytics and dashboards for decision-making
- Subscription tracking and flexible revenue management
- A partner who understands both mobile development and growth strategy
👉 If you’re looking for a mobile developer who can build and grow your iOS and/or Android app from idea to revenue — let’s talk.
My skills in iOS development:
React Native, TypeScript, Swift, SwiftUI, Flutter, FlutterFlow, Dart, Kotlin, iOS, Android, Objective C, UIKit, Multithreading, Memory management, API, JSON, HTML, XML, Networking, Push notifications, CoreData, Combine, SOLID principles, Design patterns, MVC, MVP, MVVM, Coordinators, Xcode, GIT, SwiftLint, DI, CI/CD, Firebase, AppStore, ASO, Amplitude, AppsFlyer, Figma, UI/UX, Agile, Scrum, Kanban, AI.
Kotlin
TypeScript
JavaScript
PostgreSQL
React
Node.js
iOS
Android
Swift
React Native
iOS Development
Android App Development
Full-Stack Development
SQL
Web Application
API
API Development
SwiftUI
Web Development
Web Design
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