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
8 reviews
(8)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
EE
Emmanuel E.
Jun 9, 2026
Full Stack Software Developer - Tech Coach for Vibe Coders
Sonet did a fantastic job helping walk through my projects and ideas. He was extremely responsive to my requests via inbox chat and also with video chats when we needed them to dig into a code base and thoroughly explain to me so I understand. I will definitely work with Sonet again and look forward to having a project soon so that we can work together again soon!
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.
About Sonet
AI-Powered Web & Mobile App Developer | React Native, Flutter, Next.js
100%
Job Success
Khulna, Bangladesh - 1:49 am local time
Anyone can get an AI demo running in a weekend now. Turning that into a real product you can charge for and trust with real users is a different job, and that's the one I do.
Most projects need more than one piece. An app that needs a web dashboard. A website that needs a mobile version. An AI feature that has to work in production, not just in a demo. I build all of it, so nothing breaks in the handoff between freelancers, and you deal with one person who owns the outcome.
You're in the right place if:
- You want one developer to own your web app, mobile app, and backend together
- You want real AI inside your product, not a chatbot bolted on the side
- Your last developer went quiet mid-build and you need someone reliable
- You need a working MVP in weeks, not months
- You want clean, documented code you won't pay to rebuild next year
What I build
› Websites & Web Apps
Modern websites and web apps with Next.js and React: SaaS platforms, admin dashboards, client portals, and landing pages, with the backend, database, and Stripe payments built in.
› Mobile Apps
iOS and Android apps with React Native and Flutter, from idea to App Store and Play Store. Social, fitness, marketplace, real-time, and MVP builds shipped to live users.
› AI Features
Real AI built into your app: chat assistants, AI that knows your own data (RAG), text-to-speech, and smart workflows powered by Claude and OpenAI. Integrated to hold up with real users, not just in a demo.
Why clients keep working with me
- Top Rated, 100% Job Success, and 5 stars on every project I've closed
- One engineer for web, mobile, backend, AI, and launch, so nothing gets lost between teams
- Shipped real products to the App Store and to live web users, and led dev and design teams as Technical Lead
- BSc Computer Science, plus 8+ years building and shipping software
- 0 to 4 hour response time with clear, honest updates
Tools: React Native, Flutter, Expo, Next.js, React, TypeScript, Node.js, Python, Django, Supabase, Firebase, PostgreSQL, Claude, OpenAI, RAG, LangChain, Stripe, AWS, Docker
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.