Iโve Delivered 50+ Mobile Apps Used by Thousands of Users Across iOS & Android.
High-Performance Apps. Scalable Architecture. Built for Real Growth.
๐ฑ 50+ Mobile Apps Delivered startups, SaaS, and business platforms
โ Apps reaching 100K+ downloads across app stores
โก Performance optimization improving speed & stability across production apps
๐ง Built AI-powered apps with chat features, automation, and smart workflows
I develop fast, scalable, and user-focused apps for iOS and Android. From MVPs to full-scale platforms, I build products that are reliable, efficient, and ready for real-world growth.
Client Feedbacks
โFaisal did an excellent job on our app FitTrack Pro. The performance improvements and UI quality were outstanding.โ
โFaisal did an excellent job on our app FitTrack Pro. The performance improvements and UI quality were outstanding.โ Founder @ FTPRO
โHe built our app QuickServe POS from scratch and delivered exactly what we needed. Highly reliable and professional.โ Product Manager @ Retail Tech Company
โGreat experience working on EduSmart Learning App. Clean code, fast delivery, and strong communication throughoutโ. CTO @ EdTech Platform
What I Do
โ iOS & Android App Development (Native & Cross-Platform)
โ Flutter & React Native App Development
โ AI-Powered Apps (Chatbots, AI features, automation)
โ SaaS Mobile Apps & MVP Development
โ UI Implementation from Figma / Adobe XD
โ API Integration & Backend Connectivity
โ App Optimization, Bug Fixing & Performance Tuning
โ App Store & Google Play Deployment
โ Payment Integration, Push Notifications, Authentication
Tech Stack (Latest Technologies)
Flutter, React Native, iOS, Android
Dart, Kotlin, Swift, JavaScript
Firebase, REST APIs, Node.js
OpenAI API, AI Chat Features, Automation Tools
Git, Figma, App Store Connect, Google Play Console
Why Clients Work With Me
โ Clean, scalable, production-ready code
โ Strong focus on performance & UX
โ Fast communication & reliable delivery
โ Experience across startups, SaaS, and business apps
โ Long-term support and scalability mindset
๐ Why Me Over Other Mobile App Developers on Upwork?
Iโve been building mobile apps for over 15 years, working with startups, SaaS products, and growing businesses across multiple industries.
The apps Iโve developed are used by real users in production, with a strong focus on performance, scalability, and long-term reliability. From MVPs to full-scale platforms, I understand what it takes to turn an idea into a successful mobile product.
50+ apps delivered and 100K+ downloads is proof that I can build and scale mobile applications that perform in real-world conditions.
If you're serious about launching and scaling a mobile app that performs, letโs talk.
Kotlin
Android App
Mobile App
Application Security
App Design
App Development
App Store Optimization
Flutter
React
React Native
Mobile App Development
Android App Development
iOS Development
Firmware Programming
AI App Development
Application Server
Luis Fernando R.
Loveland, Ohio
$35/hr
5.0
10 jobs
๐ TOP RATED | Top 10% Freelancer on Upwork
I build high-quality, production-ready mobile apps for startups, entrepreneurs, and established businesses. From idea โ design โ development โ backend โ payments โ App Store & Google Play submission โ I handle the full mobile lifecycle.
I specialize in mobile app development, including custom iOS apps, Android apps, and Flutter cross-platform apps. If youโre looking to build or scale a full mobile product, I can take it from concept to a store-ready release with clean architecture and fast iteration.
With 100% Job Success, Top Rated status, and experience delivering complete apps from scratch, I focus on reliability, clear communication, and real business results.
What I specialize in
โข ๐ฑ Flutter cross-platform apps (clean UI, scalable architecture, localization, animations)
โข ๐ค Android Native (Kotlin ยท Jetpack Compose)
โข ๐ iOS Native (Swift ยท SwiftUI)
โข โ๏ธ Backend integrations: Node.js, FastAPI, Postgres, AWS RDS, Firebase
โข ๐ณ Payments & monetization: Stripe (Subscriptions, Connect platforms, one-time payments), in-app purchases
โข ๐ Authentication (Google, Apple, email/password, OTP)
โข ๐ฆ Push notifications, deep links, scheduling, background tasks
โข ๐ App publishing (TestFlight, Google Play, certificates, provisioning)
What clients appreciate
โข Fast and clear communication
โข End-to-end delivery (you donโt need multiple developers)
โข Pixel-perfect UI implementation
โข Strong debugging skills โ I fix what others cannot
โข Reliable, long-term collaboration
โข Clean, maintainable code
Availability
โข Available daily
โข Time zone: EST (US Eastern Time)
โข Quick response and consistent updates
๐ฌ Ready to get started? Letโs talk.
Kotlin
Flutter
Mobile App
Android App Development
Mobile App Development
Full-Stack Development
Software Development
Firebase
Google Analytics
Dart
iOS Development
Stripe
Anton A.
Irvine, California
$99/hr
5.0
16 jobs
โ๏ธ 19+ years of Software Development background
โ๏ธ 10+ years of Mobile Application & Web Development Experience
โ๏ธ Passionate about turning technical innovation into revenue and user impact.
My Technical Skill Sets:
- Mobile: Swift/SwiftUI, Kotlin/Java, Flutter and React native for cross-platform
- Web: Node.js, React.js, ASP, Vue.js, Next, Typescript, Python(Django), Codeigniter, Laravel, JavaScript, CSS, HTML, PHP
- Firebase, Amazon Web Services, Godaddy, Crashlytics
Shopify:
- Shopify Online Store 2.0
- Shopify Theme Development
- Shopify Liquid
- Shopify CLI
- Shopify Hydrogen
- Shopify Storefront API
- Shopify GraphQL API
- Shopify App Development
My Delivery:
- deploy web to your own hosting
- CI/CD with Git repo
- submit MVP to App Store Connect for testing via TestFlight
- *.apk file for Android version
- bug-free full source code
- Documentation for the project
- 3 months free support
Always trying to learn new concepts and development language / to use up-to-date technology
Like to maintain long term business affairs with clients.
Best regards,
Anton.
NOTE: I am open to collaborating with you on meaningful and valuable projects.
Kotlin
Mobile App Development
Apple Xcode
Database Programming
Web Service
Application Server
Swift
SwiftUI
iOS Development
Android App
React Native
Flutter
React
TypeScript
Node.js
Serhii L.
Richardson, Texas
$40/hr
4.9
111 jobs
AI mobile apps have become the primary way businesses connect with customers, streamline operations, and accelerate growth. As a Mobile App Developer (React Native, Flutter, Kotlin, Swift), I help startups, growing companies, enterprises transform ideas into scalable mobile products that deliver measurable business value. Whether youโre building a new application or modernizing an existing one, I focus on creating high-quality solutions powered by modern technologies and AI
For more than 10 years, our team has been designing, developing, and scaling mobile products for iOS and Android for companies worldwide. We combine the expertise of Mobile App Developer specialists, React Native engineers, Flutter developers, iOS Developer professionals, and Android developers to build secure, scalable, and user-friendly mobile applications. Our experience also includes AI-powered features, backend development, API integrations, and cloud-native architectures
Our company metrics:
โข 10+ years of full stack software development experience
โข 200+ successfully delivered projects
โข 20,000+ tracked hours on Upwork
โข 40+ software engineers and mobile specialists
โข $1M+ earned through successful client engagements
โข 5+ years average commercial experience per developer
As a Mobile App Developer (React Native, Flutter), I work closely with founders to define product strategy, validate ideas, and deliver production-ready applications. Our team builds cross-platform solutions using React Native and Flutter, as well as native applications for iOS Developer (Swift) and Android (Kotlin) environments. We also integrate AI capabilities where they create real business value, helping companies automate workflows, personalize user experiences, and improve operational efficiency
Our projects range from startup MVPs to enterprise platforms supporting thousands of users. Every Mobile App Developer on our team collaborates with experienced Flutter developers, React Native engineers, Android developers, iOS Developer specialists, Swift developers, Kotlin engineers, full stack developer teams, web developer professionals, and backend engineers to deliver reliable products from concept to launch
We specialize in mobile app development across various industries. Whether the project requires Flutter, React Native, or native Android and iOS development, our focus remains the sameโbuilding applications that are fast, secure, intuitive, and ready to scale
Our mobile app development expertise (iOS, Android) extends beyond coding. We help clients choose the right architecture, define product roadmaps, optimize user experience, and integrate AI-powered functionality into existing and new mobile products. Working alongside flutter developer, android developer, Swift iOS developer, web developer, full stack developer teams allows us to deliver complete end-to-end mobile solutions instead of isolated development services
We regularly build AI mobile applications using React Native, Flutter, Java, Kotlin, Swift, React, Python, Kotlin, and Laravel, integrating secure APIs, cloud services, payment systems, authentication, push notifications, analytics, and AI-powered automation. Every Mobile App Developer on our team understands how to create applications that perform consistently across Android and iOS devices while maintaining excellent user experiences
Every Mobile App Developer (Android, iOS) on our team focuses on building products that combine outstanding performance, scalability, and long-term maintainability. Using React Native, Flutter, Swift, native Android, and iOS Developer best practices, we create applications that support rapid business growth and evolving customer needs. Our web developer, flutter developer, android developer, iOS developer teams collaborate throughout the entire product lifecycle, while AI technologies help deliver smarter mobile experiences, personalized recommendations, intelligent automation, and data-driven decision making
AI has become an important part of modern AI mobile app development. We help businesses integrate AI into mobile products (Android, iOS) through intelligent assistants, automation, predictive features, recommendation engines, and AI-driven user experiences. Instead of adding AI as a trend, we implement practical solutions that improve customer engagement and simplify business operations
Whether you need an AI Mobile App Developer to launch a new MVP, migrate an existing application to React Native or Flutter, modernize an Android Kotlin application, improve an iOS Swift product, or expand your engineering team, we can help.
If youโre looking for a trusted Mobile App Developer with expertise in React Native, Flutter, iOS Developer, Android, Swift, Kotlin, and scalable mobile app development, letโs discuss your project and build a solution that creates lasting business value
Kotlin
Mobile App Development
Flutter
Android
React Native
Android App Development
iOS Development
Node.js
JavaScript
Firebase
React
PHP
Java
Swift
Native App Development
HTML
iPhone & iPad Apps
Dart
iOS
Feroz R.
Algonquin, Illinois
$30/hr
5.0
14 jobs
๐๐จ๐จ๐ค๐ข๐ง๐ ๐๐จ๐ซ ๐ ๐ฌ๐๐ง๐ข๐จ๐ซ ๐ฆ๐จ๐๐ข๐ฅ๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐๐ซ ๐ฐ๐ก๐จ ๐๐๐ง ๐๐ฎ๐ข๐ฅ๐, ๐ฌ๐๐๐ฅ๐, ๐๐ง๐ ๐ฅ๐๐๐ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐๐ฎ๐๐ญโ๐ง๐จ๐ญ ๐ฃ๐ฎ๐ฌ๐ญ ๐ฐ๐ซ๐ข๐ญ๐ ๐๐จ๐๐?
๐ ๐ก๐๐ฅ๐ฉ ๐ฌ๐ญ๐๐ซ๐ญ๐ฎ๐ฉ๐ฌ, ๐๐๐๐ ๐๐จ๐ฆ๐ฉ๐๐ง๐ข๐๐ฌ, ๐ก๐๐๐ฅ๐ญ๐ก๐๐๐ซ๐ ๐ฉ๐ซ๐จ๐ฏ๐ข๐๐๐ซ๐ฌ, ๐๐ง๐ ๐๐ง๐ญ๐๐ซ๐ฉ๐ซ๐ข๐ฌ๐๐ฌ build high-performance iOS, Android, and Flutter applications that are scalable, secure, and built for long-term successโnot quick prototypes that need rebuilding six months later.
๐๐ข๐ญ๐ก ๐๐+ ๐ฒ๐๐๐ซ๐ฌ ๐จ๐ ๐๐ฑ๐ฉ๐๐ซ๐ข๐๐ง๐๐, I've delivered 25+ production applications used by millions of users, helping companies launch faster, modernize legacy systems, and scale with confidence.
๐๐ข๐ ๐ก๐ฅ๐ข๐ ๐ก๐ญ๐ฌ: ๐๐+ ๐ฒ๐๐๐ซ๐ฌ โข ๐๐+ ๐๐ฉ๐ฉ๐ฌ ๐ฌ๐ก๐ข๐ฉ๐ฉ๐๐ โข ๐๐ข๐ฅ๐ฅ๐ข๐จ๐ง๐ฌ ๐จ๐ ๐ฎ๐ฌ๐๐ซ๐ฌ โข ๐๐๐๐ฅ๐ญ๐ก๐๐๐ซ๐ โข ๐ ๐ข๐ง๐๐๐๐ก โข ๐๐๐๐ โข ๐๐ง๐ญ๐๐ซ๐ฉ๐ซ๐ข๐ฌ๐
โญ ๐๐๐๐๐ง๐ญ ๐๐ฎ๐๐๐๐ฌ๐ฌ
=================
๐ฅ ๐๐ฆ๐ซ๐จ๐ง ๐๐๐๐ฅ๐ญ๐ก๐๐๐ซ๐: Led iOS development for Omron Healthcare's patient monitoring platform, delivering ahead of schedule with a team of four engineers.
๐๐จ๐๐๐ฒ ๐ญ๐ก๐ ๐ฉ๐ฅ๐๐ญ๐๐จ๐ซ๐ฆ ๐ฌ๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ๐ฌ: 50,000+ healthcare professionals across 12 countries, delivering enterprise-scale patient monitoring.
๐ผ ๐๐๐ซ๐ฏ๐ข๐๐๐ฌ ๐ ๐๐๐๐๐ซ
==================
๐ฑ ๐๐๐ญ๐ข๐ฏ๐ ๐ข๐๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ โข Swift โข SwiftUI โข UIKit โข Objective-C โข MVVM / VIPER โข Performance Optimization โข App Store Deployment
๐ ๐ ๐ฅ๐ฎ๐ญ๐ญ๐๐ซ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ โข Cross-platform Apps โข Clean Architecture โข Firebase โข Supabase โข Native Integrations โข Production-ready Applications
๐ค ๐๐ ๐๐ง๐ญ๐๐ ๐ซ๐๐ญ๐ข๐จ๐ง โข OpenAI โข CoreML โข Gemini โข Vertex โข n8n โข Chatbots โข Recommendation Engines โข NLP โข Image Intelligence
๐ ๐๐๐๐ฎ๐ซ๐ ๐๐ง๐ญ๐๐ซ๐ฉ๐ซ๐ข๐ฌ๐ ๐๐ฉ๐ฉ๐ฌ โข Healthcare โข FinTech โข SaaS โข Authentication โข Encryption โข Secure SDLC โข Compliance-ready Solutions
โ ๐๐ก๐ฒ ๐๐ฅ๐ข๐๐ง๐ญ๐ฌ ๐๐ข๐ซ๐ ๐๐
======================
You're not hiring another developer. You're hiring someone who can take ownership.
๐ ๐ก๐๐ฅ๐ฉ ๐๐ฅ๐ข๐๐ง๐ญ๐ฌ:
โ Make the right architectural decisions
โ Avoid expensive technical debt
โ Deliver predictable releases
โ Improve application performance
โ Scale products with confidence
โ Lead engineering teams when needed
๐ ๐๐๐๐ ๐๐จ๐ซ๐ ๐๐ก๐๐ง ๐๐จ๐๐ข๐ฅ๐?
=========================
๐๐ก๐ข๐ฅ๐ ๐ฆ๐ฒ ๐๐จ๐ซ๐ ๐๐ฑ๐ฉ๐๐ซ๐ญ๐ข๐ฌ๐ ๐ข๐ฌ ๐ฆ๐จ๐๐ข๐ฅ๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ , ๐ ๐๐ฅ๐ฌ๐จ ๐ฅ๐๐๐ ๐ ๐ฆ๐ฎ๐ฅ๐ญ๐ข๐๐ข๐ฌ๐๐ข๐ฉ๐ฅ๐ข๐ง๐๐ซ๐ฒ ๐ฌ๐จ๐๐ญ๐ฐ๐๐ซ๐ ๐ญ๐๐๐ฆ ๐ญ๐ก๐๐ญ ๐๐๐ง ๐ฌ๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ ๐ฅ๐๐ซ๐ ๐๐ซ ๐๐ง๐ ๐๐ ๐๐ฆ๐๐ง๐ญ๐ฌ.
๐๐ฌ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐ฃ๐๐๐ญ ๐ ๐ซ๐จ๐ฐ๐ฌ, ๐ฐ๐ ๐๐๐ง ๐ฌ๐๐๐ฆ๐ฅ๐๐ฌ๐ฌ๐ฅ๐ฒ ๐๐ฑ๐ญ๐๐ง๐ ๐๐๐ฒ๐จ๐ง๐ ๐ฆ๐จ๐๐ข๐ฅ๐ ๐ฐ๐ข๐ญ๐ก:
โ Backend Development
โ Frontend Web Applications
โ UI/UX Design
โ QA & Test Automation
โ DevOps & Cloud
โ Security Audits
โ AI Automation
๐๐ก๐๐ญ ๐ฆ๐๐๐ง๐ฌ ๐ฒ๐จ๐ฎ ๐๐๐ง ๐ฌ๐ญ๐๐ซ๐ญ ๐ฐ๐ข๐ญ๐ก ๐จ๐ง๐ ๐ฌ๐๐ง๐ข๐จ๐ซ ๐๐ง๐ ๐ข๐ง๐๐๐ซ ๐๐ง๐ ๐ฌ๐๐๐ฅ๐ ๐ญ๐จ ๐ ๐๐จ๐ฆ๐ฉ๐ฅ๐๐ญ๐ ๐ฉ๐ซ๐จ๐๐ฎ๐๐ญ ๐ญ๐๐๐ฆโwithout changing vendors or coordinating multiple freelancers.
๐ฏ ๐๐๐๐๐ฅ ๐๐ซ๐จ๐ฃ๐๐๐ญ๐ฌ
===============
โ Startup MVPs
โ Enterprise Mobile Apps
โ Healthcare Platforms
โ FinTech Products
โ AI-Powered Applications
โ Long-term Product Development
โ Legacy App Modernization
๐ฉ ๐๐๐ญ'๐ฌ ๐๐ฎ๐ข๐ฅ๐ ๐๐จ๐ฆ๐๐ญ๐ก๐ข๐ง๐ ๐๐ซ๐๐๐ญ
============================
Whether you're starting from scratch, improving an existing product, or scaling an engineering team, I'd love to help. ๐๐๐ง๐ ๐ฆ๐ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ซ๐จ๐ฃ๐๐๐ญ ๐๐ซ๐ข๐๐, ๐ ๐ข๐ ๐ฆ๐ ๐๐๐ฌ๐ข๐ ๐ง๐ฌ, ๐จ๐ซ ๐๐ฏ๐๐ง ๐ฃ๐ฎ๐ฌ๐ญ ๐ฒ๐จ๐ฎ๐ซ ๐ข๐๐๐.
I'll review it, identify technical risks, and provide a practical execution plan with timelines and milestonesโ๐ญ๐ฒ๐ฉ๐ข๐๐๐ฅ๐ฅ๐ฒ ๐ฐ๐ข๐ญ๐ก๐ข๐ง ๐๐ ๐ก๐จ๐ฎ๐ซ๐ฌ.
๐๐๐ญ'๐ฌ ๐๐ฎ๐ข๐ฅ๐ ๐๐ง ๐๐ฉ๐ฉ ๐ฒ๐จ๐ฎ๐ซ ๐ฎ๐ฌ๐๐ซ๐ฌ ๐ฐ๐ข๐ฅ๐ฅ ๐ฅ๐จ๐ฏ๐โ๐๐ง๐ ๐ฒ๐จ๐ฎ๐ซ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ ๐๐๐ง ๐๐จ๐ง๐๐ข๐๐๐ง๐ญ๐ฅ๐ฒ ๐ฌ๐๐๐ฅ๐.
Kotlin
iOS Development
Swift
SwiftUI
Objective-C
Mobile App Development
Flutter
Android
Dart
React Native
Web Development
MERN Stack
Software Architecture & Design
Clean Architecture
AI Chatbot
AI App Development
AI Agent Development
Security Management
Secure SDLC
Project Management
Karl S.
Townsend, Delaware
$50/hr
4.2
20 jobs
Top Rated Plus Full Stack Mobile App Developer | Top 3% UpWork Talent | Flutter | Kotlin | Swift | React, Node.js, AWS | Building Scalable Digital Experiences
Iโm a passionate and detail-oriented Full Stack Developer with over 10 years of experience crafting high-quality Web and Mobile applications for startups, enterprises, and agencies worldwide. I specialize in building end-to-end solutions using modern technologies and frameworks โ from beautiful, responsive UIs to robust, scalable backend systems.
๐ก Tech Stack Highlights:
Frontend:Flutter (Dart), React-Native, Kotlin, Swift, React.js, Tailwind CSS, TypeScript
Backend: Node.js (Next.js, NestJS), GraphQL, REST APIs
Database:, MySQL, MSSQL, MongoDB, Firebase, Google Cloud
DevOps/Cloud: Docker, GitHub Actions, AWS (EC2, S3, Lambda)
Tools: Git, Jira, Notion, Postman, CI/CD, WebSockets, Stripe, OAuth2
What I Offer:
Full-cycle Development from concept to Deployment
Clean, maintainable, and scalable code
Mobile-friendly, SEO-optimized, and fast-loading applications
API integrations (Stripe, Twilio, Firebase, third-party REST/GraphQL)
Agile collaboration with clear communication and on-time delivery
Iโve completed a wide range of freelance projects: custom dashboards, SaaS platforms, eCommerce sites, API backends, mobile-first apps, and admin panels. Whether you're looking to launch an MVP, optimize an existing product, or scale your system, I bring technical expertise and business acumen.
โ Why Clients Choose Me:
Strong work ethic & attention to detail
Fast learner and great problem solver
Transparent and clear Communication
Available for one-time projects or long-term collaboration
Letโs build something amazing together. Drop me a message โ Iโd love to hear about your project!
Kotlin
Mobile App Development
Flutter
Dart
Swift
React Native
React
Node.js
Next.js
MongoDB
Google Cloud Platform
NestJS
Firebase Cloud Firestore
FlutterFlow
.NET Core
MySQL
API Development
Stripe API
In-App Purchases
In-App Subscription
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Kinetic Investments
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