You will get custom backend API using Node.js,Express & MongoDB
Top Rated
Project details
With real-world experience building complete backend systems like EngTalk, I handle everything from secure user authentication to efficient MongoDB database management, file uploads, and full CRUD functionality. I build APIs that power real apps, ensuring quality and performance.
Programming Languages
JavaScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$35
|
Standard
$80
|
Advanced
$150
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | Unlimited | Unlimited | Unlimited |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$5 - $20
Server Deployment & Setup
(+ 1 Day)
+$10
Admin Panel (Basic)
(+ 1 Day)
+$20
Code Walkthrough (Video/Call)
+$15Frequently asked questions
7 reviews
(7)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
MS
Michael S.
Apr 3, 2026
Fill Stack Development, Technical Lead
Sonet is a phenomenal talent who delivered an exceptionally complex sales page and database project. He demonstrated immense grit and determination, sticking with the project until the very end. He is not only highly skilled but also incredibly fair, never taking advantage of opportunities to do so. He built the plan, managed the talent, and provided excellent quality assurance. A true professional who ensures you get your end goal. A treasure chest of skill and communication! Highly recommended.
AC
Alex C.
Dec 26, 2025
Integrate Agora & Supabase in React Native App
Hired multiple people to complete this project but only he was able to get it done. Nice work. Anything realted to react native he is your guy.
RH
Rayan H.
Dec 25, 2025
Mobile-First AI-Powered Wardrobe Management App Development
Sonet worked with us as a Technical Lead and delivered strong technical leadership throughout the project. He managed the developer and designer teams, designed the system architecture, and maintained clear documentation while owning complex technical decisions. Communication was excellent, and I would happily work with Sonet again in the future—highly recommended for your project if you need a reliable senior engineer or technical lead.
AC
Alex C.
Nov 26, 2025
30 minute consultation
Doing Second paid consulting with sonet. Highly recommended.
AC
Alex C.
Oct 28, 2025
30 minute consultation
If you need anything related to mobile app development he is your guy. I have worked with many developers but ended up in disappointment but he was the only one able to complete a project for me properly.
About Sonet
Full-Stack Mobile Developer | React Native, Flutter | AI-Powered Apps
100%
Job Success
Khulna, Bangladesh - 8:14 am local time
I build AI-powered mobile apps that ship on time, hold up under real users, and won't need rewriting in a year. React Native and Flutter, iOS and Android, from wireframe to App Store and Play Store launch, with the backend, APIs, and cloud built in.
Anyone can get an AI demo running in a weekend now. Turning that into a product you can charge for and trust with real users is a different job, and that's the one I do.
💭 You're in the right place if you're thinking:
• I need a React Native or Flutter developer who takes full ownership
• I want real AI inside my app, not a chatbot bolted on the side
• My last developer vanished mid-build and I need someone reliable
• I need a production-ready MVP in weeks, not months
• I want clean, documented code, not a mess I'll rebuild next year
📱 Mobile App Development
React Native and Flutter cross-platform apps for iOS and Android. AI features built in with OpenAI, Claude, and custom RAG pipelines. Real-time, social, marketplace, fitness, dating, and MVP builds shipped to live users. When other developers couldn't get a complex real-time build working, I'm the one who finished it.
🌐 Web Apps, AI Apps & Full-Stack
React and Next.js web apps with Supabase, Firebase, and custom Node or Python backends. AI applications powered by RAG, LangChain, and vector databases, so your app actually knows your data instead of guessing. Most of my mobile clients also need a web dashboard or admin panel, and I build that too, so nothing gets lost in handoff.
🛠️ Tech Stack
• Mobile: React Native, Flutter, Expo, Swift, Kotlin
• AI: OpenAI, Claude, LangChain, RAG pipelines, vector databases
• Web: React, Next.js, TypeScript, Tailwind CSS
• Backend: Node.js, Express, Python, Django, FastAPI, REST, GraphQL
• Cloud: AWS, Docker, CI/CD
• Databases: PostgreSQL, MongoDB, Supabase, Firebase, MySQL
• Payments: Stripe, In-App Purchases
⭐ Why clients choose me
• Top Rated with 100% Job Success and a 5-star rating on every project I've closed
• Full ownership: mobile, backend, AI, cloud, and deployment handled together
• Real AI depth: RAG and full pipelines, not a ChatGPT call bolted on
• SonetCraft: agency-grade delivery with direct, personal communication
• BSc Computer Science and Technology, CUPB (Beijing)
• 0 to 4 hour response time, so you're never left waiting
• Toastmasters member: clear updates, honest feedback, easy to work with
🏢 Industries: Fitness & Health · Healthcare · Dating · Social · E-commerce · Fintech · SaaS · Marketplaces · Startup MVPs
If you've got an AI app idea, or something built fast that you're not sure you can trust, send me a message and tell me what you're building. I'll tell you straight how to get it live, working, and safe.
Steps for completing your project
After purchasing the project, send requirements so Sonet can start the project.
Delivery time starts when Sonet receives requirements from you.
Sonet works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis
I’ll review your project details and clarify any missing requirements.
API Development
I’ll build secure and well-structured RESTful API endpoints using Node.js and Express.