You will get Senior Node.js API Integration Secure File Upload Storage System
Top Rated
Project details
Looking for Senior Mobile App Development or Expert Mobile App Development with secure backend systems? I build Node.js Secure File Upload & Storage Systems integrated with Mobile App Development, Flutter, Android App Development, iOS Development, and Hybrid App Development. I develop scalable Mobile Apps for Android, iOS, Smartphone, and iPhone Apps.
My services include Mobile App Design, Mobile App Redesign, Mobile App Development Consultation, Website to Mobile App Conversion, Mobile App Bug Fix, and full App Development using JavaScript, Node.js, Dart, Java, Swift, Python, PHP, React, and React Native. Backend systems use MongoDB, Firebase, Supabase, Laravel, and Django.
I implement User Authentication, User Profile Creation, and secure API Integration, REST API Integration, and GraphQL for file uploads, storage management, and cloud access. I also support FlutterFlow, modern Web Development, and scalable storage APIs.
Using Git, Xcode, and Android Studio, I prepare secure apps ready for App Store and Google Play. I ensure Cross-platform architecture, strong App Security, and modern AI Mobile App Development, including AI Mobile App features and Agentic AI integrations.
My services include Mobile App Design, Mobile App Redesign, Mobile App Development Consultation, Website to Mobile App Conversion, Mobile App Bug Fix, and full App Development using JavaScript, Node.js, Dart, Java, Swift, Python, PHP, React, and React Native. Backend systems use MongoDB, Firebase, Supabase, Laravel, and Django.
I implement User Authentication, User Profile Creation, and secure API Integration, REST API Integration, and GraphQL for file uploads, storage management, and cloud access. I also support FlutterFlow, modern Web Development, and scalable storage APIs.
Using Git, Xcode, and Android Studio, I prepare secure apps ready for App Store and Google Play. I ensure Cross-platform architecture, strong App Security, and modern AI Mobile App Development, including AI Mobile App features and Agentic AI integrations.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$450
|
Standard
$650
|
Advanced
$1,400
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 15 days |
Number of Revisions | 3 | 6 | Unlimited |
Design Customization | - | - | - |
Content Upload | |||
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$200 - $500
Additional Revision
+$60Frequently asked questions
8 reviews
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AJ
Ahtisham J.
Aug 18, 2026
AI-Powered Flutter Mobile App Development
Excellent Flutter & Dart Developer with strong expertise in AI-powered mobile app development, Android and iOS, AI integration, mobile app development, UI/UX, API integration, testing, and performance optimization. Delivered a high-quality, scalable app with excellent communication and attention to detail. Highly recommended for Flutter, Dart, AI, and cross-platform mobile development.
MR
Muazzam R.
Jul 20, 2026
Flutter Mobile App Developer Needed for AI-Powered Cross-Platform Mobile App(Flutter, Dart, Node.js)
Shiraz did an excellent job on our Flutter mobile app development project. He demonstrated strong technical expertise, communicated clearly throughout the process, and delivered high-quality work on time. He was responsive to feedback, solved issues efficiently, and ensured the app met all of our requirements. I would highly recommend Shiraz to anyone looking for a skilled and reliable Flutter developer, and I look forward to working with him again on future projects.
AS
Ahmad S.
Jul 16, 2026
You will get Senior Flutter Mobile App Development API Integration & App Security
This freelancer is an exceptional Flutter Mobile App Developer with extensive expertise in AI Mobile App Development, Android, iOS, Flutter, Dart, and Full Stack Mobile App Development. Their strong technical knowledge, clean development approach, and experience with API Integration, Node.js, Firebase, and AI-powered applications consistently result in high-quality, scalable mobile solutions. Communication was excellent throughout the project, and every milestone was delivered professionally and on schedule. I highly recommend them for Flutter Mobile App Development, Cross-Platform Mobile Development, AI Mobile Apps, and custom Android and iOS application projects.
AJ
Ahtisham J.
Jul 3, 2026
You will get Senior Flutter Mobile App Development API Integration & App Security
Purchased a Mobile App Development service from Shiraz's catalog, and the experience was excellent. Delivered solid work covering Flutter and App Development with clean, functional results across both iOS Development and Android App Development. He also handled the back-end side well; Node.js, Express.js, Firebase, and API Integration were all implemented smoothly. Professional, responsive, and delivered exactly what was promised. Highly recommend his catalog services for anyone needing reliable Mobile App Development.
TA
Tamer A.
Jun 22, 2026
Flutter App Enhancements
Shiraz is a dedicated professional with exceptional skills. He knows what needs to be done to deliver and we will surely work with him again isAllah
About Shiraz
Flutter Mobile App Developer, AI Mobile App Development, iOS, Android
100%
Job Success
Riyadh, Saudi Arabia - 12:09 am local time
✅ 60+ Mobile App Development projects successfully delivered
✅ 100% Job Success as a Mobile App Developer
✅ 30+ apps live on App Store & Google Play
✅ AI-powered Mobile App Development using OpenAI
I’m a Mobile App Developer with strong experience in Mobile App Development using Flutter, Android, and iOS.
As a Top 1% Mobile App Developer on Upwork, I have worked on multiple successful Mobile App Development projects, building apps used by thousands of users worldwide. Your idea could be next.
💡 𝐌𝐲 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞
📱 𝐂𝐨𝐫𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬
✔ Full-cycle Mobile App Development (from idea to launch)
✔ Cross-platform Mobile App Development (Flutter, React Native)
✔ Native Mobile App Development (Android & iOS)
✔ AI Mobile App Development & integrations
🛠️ 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐈 𝐔𝐬𝐞 𝐢𝐧 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
✔ Mobile App Development: Flutter, Dart, React
✔ AI Mobile App Development: OpenAI API
✔ Backend & API Development: Node.js, Python (FastAPI, Flask, Django), REST API, GraphQL API
✔ Database Management: Firebase, Firestore, SQLite, MySQL, MongoDB
✔ Cloud Integration: Firebase Cloud Functions, AWS, Google Cloud
✔ Tools & Workflow: Git, GitHub, GitLab, Bitbucket, Jira, Trello
✔ UI/UX Design: Figma, Adobe XD, Material Design, Cupertino Widgets
📊 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐈’𝐯𝐞 𝐁𝐮𝐢𝐥𝐓
✔ Ride Instructor Booking Mobile App Development (like Uber) (iOS and Android)
✔ Real Estate Listing Mobile App Development (like Airbnb)
✔ Social Media Mobile App Development (iOS and Android)
✔ Sports Mobile App Development (iOS and Android)
✔ Food Delivery Mobile App Development (iOS and Android)
✔ E-commerce Mobile App Development (iOS and Android)
✔ Freelance Mobile App Development (iOS and Android)
✔ Learning Management Mobile App Development (iOS and Android)
✔ Appointment Booking Mobile App Development (iOS and Android)
✔ Venue Booking Mobile App Development (iOS and Android)
✔ Customer Relationship Management Systems (CRMs)
✔ On-demand Mobile App Development (iOS and Android)
🎯 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞 𝐚𝐬 𝐘𝐨𝐮𝐫 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫?
✔ Extensive experience in Mobile App Development
✔ Clean, scalable, and production-ready code
✔ Clear communication and timely delivery
✔ Reliable long-term support after development
🤝 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐆𝐞𝐭
1️⃣ A dedicated Mobile App Developer
2️⃣ Expert consultation for your Mobile App Development idea
3️⃣ A smooth and transparent development process
4️⃣ A high-quality product designed for real users
🚀 𝐋𝐞𝐭’𝐬 𝐒𝐭𝐚𝐫𝐭 𝐘𝐨𝐮𝐫 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐧𝐭 𝐏𝐫𝐨𝐣𝐞𝐜𝐭
If you are looking for a skilled Mobile App Developer for your next Mobile App Development project, feel free to invite me.
Let’s build something exceptional together.
Highlighted Skills:
Flutter, Dart, Flutter Mobile App Developer, Dart Developer, OpenAI API, Full Stack Developer, Back End Developers, API, API Developer, Node.js, Node.js Developer, SQL, App Developer, App, Mobile App Development, Mobile App Developer, Android App Development, Android App Developer, Mobile App, AI Mobile App Development, AI Mobile App Developer, Mobile App Design, Mobile UI Design, Responsive Design, UI/UX Designer, Prototyping, Mobile App UI, Mobile App API, Mobile Application, Mobile Application Developer, Mobile Application Developement, iOS, Android, iOS App, Android App, iOS Application, Flutter iOS, Flutter iOS Android, Hybrid App, Hybrid App Development, Hybrid App Developer, Cross Platform Mobile Development, Cross Platform Mobile Developer, Cross Platform App Developer, Cross Platform App Development, Express.js, RESTful API, Express API, API Integration, Mobile App API Integration, App API Integration, Expert Full Stack Developer, Full Stack Mobile App Developer, Expert Full Stack Mobile App Developer, AI Mobile App, Mobile, Application, Application Development, Application Developer, Application Designer, Application API Integration, Build App, Build Mobile App, Flutter App Developer, iOS App Developer, Cross-Platform Mobile Developer, Machine Learning App Integration, Senior Mobile App Developer, Flutter Mobile App Development, Flutter Developer, Software Designer
Steps for completing your project
After purchasing the project, send requirements so Shiraz can start the project.
Delivery time starts when Shiraz receives requirements from you.
Shiraz works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis
Review Mobile App Development, Web Development, Node.js backend, API Integration, User Authentication, and define secure App Security architecture for file upload and storage.
Backend & Database Setup
Create Node.js backend, configure MongoDB, Firebase, or Supabase, and implement REST API Integration and GraphQL endpoints for secure file storage.