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Andrey C.

Los Angeles, California

$35/hr
4.8
97 jobs

25+ years in software, 17+ years in mobile, and 700+ apps delivered. I build and scale iOS, Android, Flutter & React Native products end to end - from architecture and backend integrations to launch, monetization, performance, and long-term growth. ๐Ÿ‘‹ Hi! Iโ€™m a veteran full stack developer, mobile app developer, and team lead leading a senior long-term team capable of taking products from idea โ†’ launch โ†’ scale โ†’ maintenance. Iโ€™ve been in professional software development for 25+ years and mobile app development for 17+ years, delivering scalable iOS Development, Android App Development, Flutter, React Native, and backend-driven platforms across startups, SaaS products, enterprises, and high-growth mobile ecosystems. Clients usually come to us when they need more than just coding - they need a technical partner who understands architecture, business logic, scalability, monetization, and long-term product growth. ๐Ÿ† Why Clients Choose Me โœ”๏ธ 25+ years as a full stack developer and software architectโ€จ โœ”๏ธ 17+ years in mobile app developmentโ€จ โœ”๏ธ 700+ mobile apps delivered across iOS, Android, Flutter & React Nativeโ€จ โœ”๏ธ Expertise in native app development, hybrid app development, and scalable backend systemsโ€จ โœ”๏ธ Reduced crash rates by up to 70% and improved app performance by 50% on production appsโ€จ โœ”๏ธ Built mobile platforms used by 5M+ users worldwideโ€จ โœ”๏ธ Strong experience with Mobile App Improvement, Mobile App Bug Fix, and modernization projectsโ€จ โœ”๏ธ Long-term experience with startups, SaaS companies, enterprises, and Fortune 500 clientsโ€จ โœ”๏ธ Full-cycle delivery: architecture โ†’ development โ†’ deployment โ†’ scaling โ†’ suppo As a mobile application developer, ios developer, android developer, flutter developer, and full stack developer, I specialize in building high-performance native and cross-platform mobile apps used by millions of users worldwide. I work with native iOS development using Swift, SwiftUI, UIKit, and Objective-C, native Android development with Kotlin and Java, as well as Flutter, React Native, and hybrid app development for scalable cross-platform delivery. Over the years, Iโ€™ve helped build 700+ apps across fintech, healthcare, social networking, education, entertainment, e-commerce, IoT, and enterprise SaaS. My experience covers the full mobile app development lifecycle - system architecture, UI/UX implementation, backend development, API Integration, DevOps, deployment, scaling, optimization, and long-term product evolution. ๐Ÿ“ฑ Native iOS & Android Development โ€ข Native iOS Development with Swift, SwiftUI, UIKit, Combine, Objective-C โ€ข Native Android App Development with Kotlin, Java, Jetpack Compose โ€ข Smartphone app optimization for performance, UX, and scalability โ€ข Clean Architecture, MVVM, VIPER, modular app structures โ€ข Device integrations: BLE, GPS, biometrics, camera, sensors, HealthKit, Google Fit โ€ข App Store & Google Play deployment pipelines โ€ข Multi-language apps with localization and accessibility support โ€ข Advanced performance optimization and memory management ๐Ÿ” Cross-Platform & Hybrid App Development โ€ข Flutter developer expertise for scalable cross-platform products โ€ข React Native development with custom native module integrations โ€ข Kotlin Multiplatform Mobile (KMM/KMP) โ€ข Shared business logic across iOS and Android โ€ข Adaptive UI systems and responsive mobile layouts โ€ข Cross-platform architectures reducing development time by 40โ€“60% ๐Ÿ”ง Backend, API Integration & Infrastructure โ€ข REST API and GraphQL API Integration โ€ข Firebase, Node.js, PHP, and scalable backend services โ€ข Authentication systems, caching, offline sync, token management โ€ข SQLite, Room, Realm, Core Data โ€ข Push notifications: FCM, APNS, OneSignal โ€ข Real-time chat, geolocation systems, dashboards, and live data platforms โ€ข Backend-connected mobile ecosystems with scalable cloud infrastructure โš™๏ธ DevOps, CI/CD & Delivery โ€ข Fastlane, GitHub Actions, Bitrise, Firebase App Distribution โ€ข Automated testing and deployment pipelines โ€ข Beta testing, crash analytics, staged rollouts โ€ข CI/CD optimization for faster and safer release cycles โ€ข AWS and scalable cloud deployment workflows ๐Ÿ“Š Analytics & Monetization โ€ข Firebase Analytics, Mixpanel, Amplitude, Google Analytics โ€ข In-app purchases, subscriptions, AdMob, Facebook Ads โ€ข Retention optimization and funnel analytics โ€ข Data-driven product iteration and growth optimization ๐Ÿ”Œ Advanced SDK & Hardware Integrations โ€ข AVFoundation, CameraX, Core Bluetooth, Core Motion โ€ข Stripe, Twilio, Agora, Sendbird, Mapbox, OpenCV โ€ข IoT dashboards, BLE integrations, voice/video systems โ€ข Camera-heavy and sensor-based mobile applications ๐ŸŒ Industries Served โ€ข Fintech & Banking โ€ข Healthcare & Fitness โ€ข E-commerce & Retail โ€ข Smart Home & IoT โ€ข Education & E-learning โ€ข Social Networking โ€ข Travel & Hospitality โ€ข Entertainment & Media โ€ข SaaS & Enterprise Platforms โœ… Letโ€™s Build a Mobile Product That Scales!

  • Mobile App Development
  • App Development
  • Mobile App
  • Smartphone
  • Flutter
  • Hybrid App Development
  • iOS Development
  • Android App Development
  • iPad App Development
  • Android
  • iOS
  • Swift
  • Objective-C
  • Firebase
  • Apple Xcode
  • API Integration
  • User Authentication
  • User Profile Creation
  • Kotlin
  • Mobile App Design
Jayesh P.

Ahmedabad, India

$25/hr
4.9
8 jobs

As the CEO of Vrinsoft Technology, I am proud to introduce our esteemed company and the exceptional services we offer to clients worldwide. With a robust track record of delivering innovative solutions since our inception, Vrinsoft Technology has established itself as a leading name in the IT industry, providing top-notch services across various domains. Overview: Vrinsoft Technology is a full-service IT company that specializes in web and mobile app development, custom software solutions, digital marketing, and IT consulting. With a team of highly skilled and passionate professionals, we strive to bring the latest technological advancements and creative ideas to our clients' businesses, empowering them to thrive in the digital era. Services: ๐Ÿ”ธ Web and Mobile App Development: Our expertise lies in crafting dynamic, user-friendly, and feature-rich web and mobile applications. From responsive websites to cutting-edge mobile apps, we excel in leveraging technologies such as React, Angular, iOS, Android, React Native, and Flutter to deliver seamless digital experiences. ๐Ÿ”ธ Custom Software Development: We offer tailor-made software solutions that cater to the unique needs of our clients. Our in-depth understanding of various industries enables us to develop scalable and secure software that enhances efficiency and streamlines operations. ๐Ÿ”ธ Digital Marketing: Our digital marketing services are designed to boost our clients' online presence and drive measurable results. From SEO and content marketing to social media and PPC campaigns, we create strategies that attract and engage the target audience, ultimately increasing brand visibility and conversions. ๐Ÿ”ธ IT Consulting: Our seasoned consultants provide valuable insights and guidance to businesses seeking to optimize their IT infrastructure, adopt emerging technologies, and streamline processes. We help clients make informed decisions that lead to better business outcomes. Top Clients: At Vrinsoft Technology, we have had the privilege of serving a diverse clientele from various industries. Some of our esteemed clients include prominent startups, small and medium-sized enterprises, and Fortune 500 companies like **Porsche, Mitsubishi, Zara, Lego, Kuwait Airlines, Marriot, Brilliant Optic**, etc. Our commitment to delivering excellence and exceeding expectations has earned us long-term partnerships with several renowned brands. Core Competencies: ๐Ÿ”ธ Technical Expertise: Our team consists of skilled developers, designers, and digital strategists who are proficient in the latest technologies and tools. This expertise enables us to develop high-performance solutions that meet industry standards and exceed client expectations. ๐Ÿ”ธ Client-Centric Approach: We firmly believe in putting our clients' needs first. Our client-centric approach ensures that we thoroughly understand their requirements, provide regular updates, and maintain open communication throughout the project lifecycle. ๐Ÿ”ธ Quality and Timely Delivery: Quality is at the core of everything we do. We adhere to rigorous quality assurance processes to deliver flawless products. Additionally, our agile development methodology allows us to complete projects within agreed-upon timelines. ๐Ÿ”ธ Innovative Solutions: We encourage innovation and creativity within our team. This approach empowers us to devise unique and innovative solutions that give our clients a competitive edge in the market. In conclusion, Vrinsoft Technology is your one-stop destination for all your IT needs. We are driven by the passion to excel and the desire to create transformative solutions that help businesses flourish. Whether you need a stunning website, a feature-packed mobile app, or comprehensive digital marketing services, we are ready to elevate your business to new heights. Partner with us on Upwork, and together, we can create a digital success story that stands the test of time.

  • Mobile App Development
  • Web Development
  • PHP
  • MERN Stack
  • Laravel
  • Node.js
  • MEAN Stack
  • Python
  • React Native
  • Blockchain
  • iOS Development
  • Flutter
  • React
  • AngularJS
  • Android App Development
Harsh S.

Bhavnagar, India

$25/hr
4.8
17 jobs

Hi! I'm Harsh, a Full Stack Developer with ๐Ÿ“+ ๐ฒ๐ž๐š๐ซ๐ฌ building ๐€๐ˆ-๐ฉ๐จ๐ฐ๐ž๐ซ๐ž๐ mobile and web applications. I help startups and SaaS companies launch production ready solutions using ๐…๐ฅ๐ฎ๐ญ๐ญ๐ž๐ซ, ๐‘๐ž๐š๐œ๐ญ, ๐๐ฒ๐ญ๐ก๐จ๐ง, ๐…๐ข๐ซ๐ž๐›๐š๐ฌ๐ž, ๐’๐ฎ๐ฉ๐š๐›๐š๐ฌ๐ž, and ๐€๐ˆ ๐ข๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง๐ฌ. โ– ๐—™๐—จ๐—Ÿ๐—Ÿ ๐—ฆ๐—ง๐—”๐—–๐—ž ๐—˜๐—ซ๐—ฃ๐—˜๐—ฅ๐—ง๐—œ๐—ฆ๐—˜ โ—† ๐—›๐˜†๐—ฏ๐—ฟ๐—ถ๐—ฑ ๐— ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ (๐—ถ๐—ข๐—ฆ & ๐—”๐—ป๐—ฑ๐—ฟ๐—ผ๐—ถ๐—ฑ) โ†’ Flutter/Dart โ€ข React Native โ€ข Native Android (Java/Kotlin) โ†’ App Store & Google Play โ€ข Clean Architecture โ€ข MVVM โ€ข Riverpod โ€ข BLoC โ—† ๐—ฅ๐—ฒ๐˜€๐—ฝ๐—ผ๐—ป๐˜€๐—ถ๐˜ƒ๐—ฒ ๐—ช๐—ฒ๐—ฏ ๐—”๐—ฝ๐—ฝ๐˜€ โ†’ React.js โ€ข Next.js โ€ข TypeScript โ€ข Tailwind CSS โ†’ Progressive Web Apps (PWA) โ€ข Single Page Applications (SPA) โ—† ๐—•๐—ฎ๐—ฐ๐—ธ๐—ฒ๐—ป๐—ฑ & ๐—”๐—ฃ๐—œ๐˜€ โ†’ Python (Django/Flask/FastAPI) โ€ข Node.js/Express โ†’ Firebase (Auth, Firestore, Cloud Functions) โ€ข Supabase (PostgreSQL, Edge Functions) โ†’ RESTful APIs โ€ข GraphQL โ€ข WebSocket โ€ข Microservices โ—† ๐—”๐—œ & ๐— ๐—ฎ๐—ฐ๐—ต๐—ถ๐—ป๐—ฒ ๐—Ÿ๐—ฒ๐—ฎ๐—ฟ๐—ป๐—ถ๐—ป๐—ด โ†’ OpenAI GPT-4 โ€ข Claude AI โ€ข LangChain โ€ข RAG โ†’ Custom AI Chatbots โ€ข NLP โ€ข Computer Vision โ†’ TensorFlow โ€ข PyTorch โ€ข scikit-learn โ—† ๐—”๐—œ-๐—”๐—ฐ๐—ฐ๐—ฒ๐—น๐—ฒ๐—ฟ๐—ฎ๐˜๐—ฒ๐—ฑ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ โ†’ Lovable โ€ข Replit โ€ข Cursor AI โ€ข GitHub Copilot โ†’ 40-50% faster delivery โ€ข MVP to Production โ—† ๐——๐—ฎ๐˜๐—ฎ๐—ฏ๐—ฎ๐˜€๐—ฒ & ๐—–๐—น๐—ผ๐˜‚๐—ฑ โ†’ PostgreSQL โ€ข MySQL โ€ข MongoDB โ€ข Firebase โ€ข Supabase โ†’ AWS โ€ข Google Cloud โ€ข Vercel โ€ข Netlify โ—† ๐—ฃ๐—ฎ๐˜†๐—บ๐—ฒ๐—ป๐˜๐˜€ & ๐——๐—ฒ๐˜ƒ๐—ข๐—ฝ๐˜€ โ†’ Stripe โ€ข Razorpay โ€ข RevenueCat โ€ข Apple/Google Pay โ†’ CI/CD (GitHub Actions) โ€ข Docker โ€ข Automated Testing โ– ๐—ช๐—›๐—”๐—ง ๐—œ ๐——๐—˜๐—Ÿ๐—œ๐—ฉ๐—˜๐—ฅ โœ“ For ๐’๐ญ๐š๐ซ๐ญ๐ฎ๐ฉ๐ฌ: Launch AI-powered MVPs 30-40% faster with mobile apps, web platforms, and scalable backends โœ“ For ๐’๐š๐š๐’: Build complete platforms with cross-platform apps, dashboards, AI features, payments, and real-time sync โœ“ For ๐€๐ ๐ž๐ง๐œ๐ข๐ž๐ฌ: Deliver white-label solutions with production-grade code and reliable timelines โœ“ For ๐๐ฎ๐ฌ๐ข๐ง๐ž๐ฌ๐ฌ๐ž๐ฌ: Modernize legacy systems or scale to 100K+ users with zero downtime โ– ๐—ฃ๐—ฅ๐—ข๐—๐—˜๐—–๐—ง ๐—›๐—œ๐—š๐—›๐—Ÿ๐—œ๐—š๐—›๐—ง๐—ฆ โ—ˆ ๐€๐ˆ ๐’๐š๐š๐’ ๐๐ฅ๐š๐ญ๐Ÿ๐จ๐ซ๐ฆ - Flutter + React + Python + Supabase Built complete SaaS with mobile apps (iOS/Android), web dashboard, Python APIs, and Supabase. Integrated OpenAI chatbot, Stripe subscriptions, and real-time sync. โ—ˆ ๐‘๐ž๐š๐ฅ-๐“๐ข๐ฆ๐ž ๐‚๐ก๐š๐ญ - 100K+ Users Full-stack chat app with Flutter mobile, React web, Firebase backend, WebSocket. End-to-end encryption, push notifications, offline sync. โ—ˆ ๐„-๐œ๐จ๐ฆ๐ฆ๐ž๐ซ๐œ๐ž - Mobile + Dashboard + Backend Flutter app, React admin panel, Python/FastAPI, Supabase. Stripe payments, inventory management, real-time tracking. Result: 40% crash reduction, 4.6โ˜… rating. โ—ˆ ๐‹๐จ๐ฏ๐š๐›๐ฅ๐ž ๐ญ๐จ ๐๐ซ๐จ๐๐ฎ๐œ๐ญ๐ข๐จ๐ง - 14 Days Transformed AI code into production app with Flutter, React, Python, GPT-4, and Supabase. Launched ahead of schedule. โ– ๐—ฆ๐—˜๐—ฅ๐—ฉ๐—œ๐—–๐—˜๐—ฆ โ—‡ ๐…๐ฎ๐ฅ๐ฅ-๐’๐ญ๐š๐œ๐ค ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ฆ๐ž๐ง๐ญ โ†’ Hybrid mobile apps (Flutter/React Native) for iOS & Android โ†’ Responsive web apps (React/Next.js) โ†’ Progressive Web Apps โ€ข End-to-end development โ—‡ ๐๐š๐œ๐ค๐ž๐ง๐ & ๐€๐๐ˆ๐ฌ โ†’ Python (Django/Flask/FastAPI) โ€ข Node.js โ†’ Firebase/Supabase setup โ€ข REST/GraphQL APIs โ†’ Database design (PostgreSQL/MongoDB/MySQL) โ—‡ ๐€๐ˆ ๐ˆ๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐จ๐ง โ†’ OpenAI GPT โ€ข Claude AI โ€ข Custom chatbots โ†’ LangChain โ€ข RAG โ€ข ML models โ€ข NLP โ—‡ ๐€๐ˆ ๐‚๐จ๐๐ž ๐Ž๐ฉ๐ญ๐ข๐ฆ๐ข๐ณ๐š๐ญ๐ข๐จ๐ง โ†’ Lovable/Replit refactoring โ€ข MVP to production โ†’ Cursor AI integration โ€ข Quality assurance โ—‡ ๐๐š๐ฒ๐ฆ๐ž๐ง๐ญ๐ฌ & ๐ƒ๐ž๐ฉ๐ฅ๐จ๐ฒ๐ฆ๐ž๐ง๐ญ โ†’ Stripe โ€ข RevenueCat โ€ข Apple/Google Pay โ†’ App Store/Play Store publishing โ€ข Web deployment โ†’ CI/CD โ€ข Beta testing โ– ๐—ฃ๐—˜๐—ฅ๐—™๐—˜๐—–๐—ง ๐—™๐—ข๐—ฅ: โœ… Full-Stack Mobile & Web Apps (iOS/Android/Web) โœ… AI Integration (ChatGPT/Custom Chatbots/ML) โœ… Backend Development (Python/Node.js/Firebase/Supabase) โœ… Real-Time Features (Chat/Notifications/WebSocket) โœ… Payment Integration (Stripe/RevenueCat/Subscriptions) โœ… Clean Architecture (Scalable/Production-Ready) โœ… Lovable/Replit Optimization (AI Code Refactoring) โœ… Legacy Migration (Native to Flutter/Performance) Let's build full stack solutions that scale, perform, and deliver real business results. ๐Ÿ“ž ๐—Ÿ๐—˜๐—ง'๐—ฆ ๐—–๐—ข๐—ก๐—ก๐—˜๐—–๐—ง Send your project details, I'll respond within 24 hours with a clear plan and timeline. No pitches, just actionable solutions.

  • Mobile App Development
  • Android App Development
  • iOS Development
  • Android UI Design
  • iOS
  • Android
  • Java
  • Swift
  • Native App Development
  • Android Studio
  • Apple Xcode
  • Realm Database
  • SQLite
  • Flutter
  • Dart
Nader H.

Cairo, Egypt

$30/hr
5.0
18 jobs

From Concept ๐Ÿ’ก to Reality ๐Ÿ“ฒ and Beyond ๐Ÿ’ฐ๐Ÿš€โฌ†๏ธ Top Rated Plus Full Stack Wizard with 8+ years of experience, ready to breathe life into your tech visions! I specialize in mobile apps, web development, and CRM solutions. Whether it's building scalable architectures, integrating third-party APIs, or designing robust databases, Iโ€™ve got you covered. View my upwork portfolio website @ naderhosny.com ๐Ÿš€ Why Work With Me? โœ… Expertise Across Multiple Stacks: โœจ Angular โ€“ Crafting dynamic web applications. โœจ React - Crafting dynamic web applications using react and react native. โœจ ASP.NET Core โ€“ Building secure, scalable backends. โœจ Node.js โ€“ Developing efficient server-side applications. โœจ Python Django โ€“ Crafting robust backend systems. โœ… Proven Track Record: โญ Top Rated Plus on Upwork with a history of delivering exceptional results. โญ 7+ years of hands-on experience in full-stack development. โญ Client satisfaction & high-quality solutions โ€“ always a priority! โœ… A Clientโ€™s Words: "Naderโ€™s technical expertise stood out as he delivered a high-quality, functional solution that met all project specifications. He was professional, responsive, and open to feedback, making the collaboration smooth and productive. His commitment to delivering a polished product on time is commendable. Highly recommended!" ๐Ÿ› ๏ธ My Tech Stack: ๐Ÿ”น Ionic (Hybrid mobile apps) ๐Ÿ”น Angular (Frontend development) ๐Ÿ”น ASP.NET Core (Scalable backend solutions) ๐Ÿ”น Node.js (Efficient server-side apps) ๐Ÿ”น Python Django (Powerful backend systems) ๐Ÿ”น MySQL & MongoDB (Database design & management) ๐Ÿ“‚ Portfolio & Contact: See my work in action: naderhosny.com Letโ€™s craft your next big project together! ๐Ÿš€ ๐Ÿ” SEO Keywords: Mobile app development, web development, CRM solutions, Angular developer, ASP.NET Core expert, Node.js developer, Python Django developer, full-stack development, third-party API integrations, database design, software architecture, solutions architect, scalable web applications, secure web solutions, dynamic web applications, robust backend systems, efficient server-side applications, startup experience, tech innovations, digital transformation, portfolio, experienced developer, professional coder, freelance developer, Upwork developer, tech wizard, digital marvels, secure solutions, scalable applications, robust architectures, tech visions, software solutions, industry expert, software engineer.

  • Mobile App Development
  • App Development
  • Full-Stack Development
  • Database Design
  • API
  • Web Development
  • ASP.NET Core
  • Angular
  • CRM Software
  • Web Design
  • UX & UI
  • UI/UX Prototyping
  • iOS
  • Android
  • Ionic Framework
Anthony C.

Lagos Island, Nigeria

$15/hr
5.0
4 jobs

Are you looking for a reliable Flutter developer who can turn your app idea into a high-quality, scalable mobile application? I specialize in building modern cross-platform mobile applications using Flutter and Firebase, helping startups, entrepreneurs, and established businesses launch secure, high-performing apps for Android and iOS. Whether you're building an MVP or a full-featured enterprise solution, I focus on creating applications that are intuitive, scalable, and built for long-term success. Over the years, I have worked on a wide range of mobile solutions across industries, including AI-powered applications, Real Estate, E-Commerce, FinTech, Healthcare, Food Delivery, Logistics, SaaS, CRM, Education, Travel, Marketplace, Booking Systems, Social Networking, and Business Management Platforms. My development process covers the complete product lifecycleโ€”from planning and UI implementation to backend integration, testing, deployment, and ongoing maintenance. I build clean, maintainable code that delivers excellent performance and provides users with a seamless experience across devices. What I can help you build: โœ” AI-Powered Mobile Applications โœ” Custom Flutter Mobile Apps โœ” MVP Development for Startups โœ” Real Estate & Property Marketplace Apps โœ” E-Commerce & Multi-Vendor Marketplace Apps โœ” Healthcare & Telemedicine Applications โœ” Food Delivery & Logistics Platforms โœ” Booking & Reservation Systems โœ” FinTech & Digital Wallet Applications โœ” SaaS & CRM Solutions โœ” Social Media & Community Apps โœ” Educational & eLearning Platforms My Technical Expertise: โ€ข Flutter & Dart โ€ข Firebase Authentication, Firestore & Cloud Storage โ€ข REST API & GraphQL Integration โ€ข OpenAI & AI API Integration โ€ข Google Maps & Location Services โ€ข Payment Gateway Integration (Stripe, PayPal, Flutterwave, Paystack) โ€ข Push Notifications (Firebase Cloud Messaging) โ€ข State Management (Provider, Riverpod, Bloc, GetX) โ€ข Supabase โ€ข SQLite & Local Storage โ€ข Git & GitHub โ€ข App Store & Google Play Deployment I believe successful mobile applications are more than just functionalโ€”they should solve real business problems, provide exceptional user experiences, and support long-term growth. I take time to understand each client's goals, communicate clearly throughout the project, and deliver solutions that are reliable, scalable, and aligned with business objectives. If you're looking for a Flutter developer who values quality, attention to detail, and long-term collaboration, I'd be happy to discuss your project and help bring your vision to life. Keywords: Flutter Developer, Mobile App Development, Flutter, Firebase, Android App Development, iOS Development, Cross-Platform Development, AI Integration, OpenAI, Firebase, REST API, GraphQL, UI/UX, MVP Development, SaaS, CRM, FinTech, Healthcare, E-Commerce, Marketplace, Booking System, Food Delivery, Real Estate, Logistics, Payment Integration, Google Maps API, FlutterFlow.

  • Mobile App Development
  • Flutter
  • FlutterFlow
  • Firebase
  • API Integration
  • UX & UI Design
  • Figma
  • No-Code Development
  • iOS Development
  • Android App Development
  • Push Notifications
  • Payment Integration Framework
  • Mobile App Design
  • Mobile App Redesign
  • AI Development
  • User Authentication
  • SaaS Development
  • Mobile App Bug Fix
  • Mobile App Testing
  • AI Chatbot
Hamza M.

Islamabad, Pakistan

$20/hr
5.0
5 jobs

I am a full-stack software engineer with 8+ years of experience delivering high-quality mobile and web applications. My expertise is in React Native and ReactJS, with strong skills in blockchain (ethers.js, wallets, staking, NFTs), AI-powered solutions, and secure payment systems (Stripe, PayPal, Apple Pay, Google Pay, subscriptions). Iโ€™ve successfully built and led projects for industries such as healthcare, real estate, eCommerce, fintech, and automotive, working with clients across the globe. From scalable mobile apps to Next.js web platforms, I handle end-to-end development: architecture, coding, CI/CD pipelines, deployment, and ongoing support. Core strengths include: โ€ข Mobile: React Native (Hooks, Class), Firebase (Auth, Crashlytics, Messaging, Analytics), Expo, iOS Native Bridging โ€ข Web: ReactJS, Next.js, Redux, React Query, TailwindCSS, Bootstrap โ€ข Blockchain: Wallets, smart contracts, NFT & staking modules (ethers.js) โ€ข Payments: Stripe, PayPal, Apple Pay, Google Pay, subscription billing โ€ข Real-time Features: Socket.io, App Center OTA, maps & live tracking โ€ข E-commerce: WordPress, Shopify integrations โ€ข Cloud/DevOps: AWS Cognito, GitHub, AWS CodeCommit, Jira I pride myself on writing clean, maintainable code, following best practices, and delivering solutions that scale smoothly for the future. Whether you need a crypto wallet, AI chatbot, real-time mobile app, or a modern web platform, I can help bring your vision to life. Letโ€™s connect and build something exceptional together. ๐Ÿš€

  • React Native
  • React
  • JavaScript
  • Firebase
  • Payment Gateway Integration
  • Ionic Framework
  • AWS Amplify
  • AI Bot
  • AI App Development
  • AI Chatbot
  • Shopify
  • Google APIs
  • Socket.io
  • Blockchain Development
  • Next.js

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Don't just take our word for it

What does a mobile app Development consultant do?

A mobile app development consultant guides teams through the technical and policy requirements for releasing applications on major app stores. This role focuses on preparing app submissions, validating compliance with platform guidelines, and managing the review process to secure approval. The consultant acts as a bridge between development teams and store review boards, ensuring that metadata, content ratings, and binary files meet strict submission standards.

  • Prepare and maintain required app information for store review, including accurate content rating fields and sign-in details. The consultant audits metadata in App Store Connect or Google Play Console to prevent rejection due to incomplete or incorrect store-facing information. This step ensures that every version submitted contains the necessary descriptive elements and legal disclosures required by platform policies.
  • Run pre-submission checks against App Review and Developer Program expectations before sending updates for evaluation. The consultant validates that the app binary functions correctly and adheres to specific iOS or Android guidelines regarding user privacy, data collection, and interface standards. By identifying potential compliance issues early, this process reduces the risk of delays during the official review phase.
  • Coordinate app release steps for each platform submission workflow, managing the transition from development to public availability. The consultant submits the app version for review via the appropriate tooling, such as App Store Connect for iOS apps or Play Console for Android releases. They also address review outcomes by interpreting feedback from platform reviewers and resubmitting updated versions or clarification notes as needed to resolve any flagged issues.

How to hire a mobile app Development consultant on Upwork

Step 1: Post a job

Define your submission goals and compliance needs clearly so candidates understand the scope. Use the Job Post Generator powered by Umaโ„ข, Upwork's Mindful AI to draft a precise description in seconds. Describe your platform targets and review hurdles, and Uma builds a tailored post for you. You can write a new post, update a saved draft, or reuse an existing post.

  • Specify whether you need help with iOS via App Store Connect or Android through Google Play Console.
  • List specific metadata fields you need managed, such as content ratings and sign-in details.
  • State if you require pre-submission checks against Apple App Review Guidelines before launch.

Step 2: Evaluate candidates

Look for proof of successful store submissions and resolved review rejections in their portfolios. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to speed up your search. Focus on consultants who document their process for handling platform policy changes.

  • Verify experience managing app content and rating submissions within Play Console Help workflows.
  • Check for examples of maintained store-facing app information during complex release cycles.
  • Confirm familiarity with coordinating release steps for both iOS and iPadOS submissions.

Step 3: Interview your top choices

Discuss their approach to platform-specific review communication and resubmission strategies. Schedule these conversations directly within Upwork Messages to keep records organized. The system generates an immediate transcript and summary after each interview for your team to review.

  • Ask how they validate features needed for submission before sending apps to review.
  • Request examples of how they addressed specific review outcomes in past projects.
  • Clarify their method for keeping app details current during the review and release cycle.

Step 4: Agree on scope and begin work

Set clear milestones for submission packages and metadata completion in the contract workroom. Use Upwork Messages for daily updates and rely on identity verification and hourly tracking for security. Fund the project with project funds to protect your budget until work meets your standards.

  • Define deliverables as store-ready app submission versions for each targeted platform.
  • Require complete app content and rating information as part of the initial milestone.
  • Include resubmission items in the scope to handle potential feedback from App Review.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a mobile app Development consultant cost?

$500-$1,500 per project is a typical range for focused mobile app Development consultant work. Final pricing depends on scope, technical complexity, required integrations, source-material quality, revision needs, and the freelancer's experience level.

App store metadata preparation

$500-$1,000/project

Entry-level to mid-level
  • Completed content rating questionnaires for iOS and Android
  • Formatted app descriptions and screenshots for review
  • Verified metadata fields in App Store Connect or Play Console

Pre-submission compliance audit

$1,000-$2,000/project

Mid-level
  • Assessment against Apple App Review Guidelines and Google policies
  • Report of missing features or non-compliant content areas
  • Step-by-step instructions to fix identified compliance issues

Platform submission management

$2,000-$4,000/project

Mid-level to senior-level
  • Submitted build packages to App Store Connect and Play Console
  • Managed communication during the platform review process
  • Published approved versions to production environments

Review rejection resolution

$4,000-$7,500/project

Senior-level
  • Interpretation of specific reviewer feedback and policy citations
  • Written responses and evidence packages for review boards
  • Updated builds and metadata submitted for secondary review

End-to-end release strategy

$7,500-$12,000/project

Expert-level
  • Phased rollout plan covering multiple platforms and regions
  • Customized compliance guidelines for ongoing app updates
  • Coordinated global release across iOS and Android stores

Frequently asked questions

Is hiring a mobile app Development consultant worth it?

For most businesses, yes: hiring a mobile app Development consultant is worthwhile. This specialist navigates complex store review policies to prevent costly rejections and delays. They prepare accurate metadata and manage submission workflows so your team focuses on building features.

How do I evaluate mobile app Development consultant candidates?

Look for candidates who cite specific experience with App Store Connect or Google Play Console submission processes. Ask them to describe how they resolved a past rejection based on content rating or metadata errors. A strong candidate explains the exact steps they took to update the listing and resubmit the build for approval.

What tools does a mobile app Development consultant use?

These consultants work directly in App Store Connect for iOS releases and Google Play Console for Android apps. They reference Apple App Review Guidelines and Play Console Help documentation to verify compliance before submission.

When should I hire a mobile app Development consultant?

Engage this expert when you prepare to submit your first app version or release a major update. Their guidance helps you avoid common pitfalls during the store review cycle and ensures your app details meet platform standards.