You will get a secure Node.js REST API for your mobile or web application
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Project details
You will get a secure, maintainable Node.js REST API built for a mobile app, web application, internal platform, or SaaS product. I use clear endpoint contracts, consistent validation, structured error handling, and practical documentation so your frontend team can integrate quickly.
With 7 years of experience across backend, mobile, and web engineering, I understand the complete request lifecycle—from client-side state and authentication to database design, permissions, deployment, and production debugging.
Depending on the package, the API can include Express.js, MongoDB, JWT authentication, role-based access, third-party API integration, Swagger/OpenAPI documentation, Postman examples, automated tests, and deployment support.
Starter covers up to 3 focused endpoints. Standard covers up to 8 endpoints with database and authentication. Advanced covers up to 15 endpoints with roles and permissions, one external integration, API documentation, tests, and deployment support.
You receive source code and a clear handover. Hosting, paid third-party services, and major infrastructure work are excluded unless agreed before ordering.
With 7 years of experience across backend, mobile, and web engineering, I understand the complete request lifecycle—from client-side state and authentication to database design, permissions, deployment, and production debugging.
Depending on the package, the API can include Express.js, MongoDB, JWT authentication, role-based access, third-party API integration, Swagger/OpenAPI documentation, Postman examples, automated tests, and deployment support.
Starter covers up to 3 focused endpoints. Standard covers up to 8 endpoints with database and authentication. Advanced covers up to 15 endpoints with roles and permissions, one external integration, API documentation, tests, and deployment support.
You receive source code and a clear handover. Hosting, paid third-party services, and major infrastructure work are excluded unless agreed before ordering.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$180
|
Standard
$550
|
Advanced
$1,100
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 3 | 8 | 15 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
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DD
Damjan D.
Jul 30, 2026
React Native (Expo) Developer — Harden, Complete & Ship iOS + Android App
Kareem was excellent to work with. He is highly skilled, communicates clearly, and was very patient throughout the project. Any delays were on my side due to limited availability, and Kareem was always understanding and professional. I would definitely work with him again.
MS
Musab S.
Jun 13, 2026
Fix Apple Screen Time / Family Controls Entitlement Issue in React Native (Expo) iOS App
This is my second time working with Kareem and he has consistently given me his best work. I strongly recommend him.
RS
Rodrigo S.
Jun 1, 2026
Update 1 -- offline audios
It is the second time I worked with Kareem and will work again and again!
MS
Musab S.
May 30, 2026
Fix Apple Screen Time / Family Controls Entitlement Issue in React Native (Expo) iOS App
Working with Kareem is a wonderful experience his commitment to go above and beyond is what makes me grateful to work with him.
RS
Rodrigo S.
May 8, 2026
Deliver an Android app from Loveable
Project was delivered very fast. I had the possibility to give some feedback and the issues were corrected right away. I´m not at all technical and Kareem had the patience to walk me through the solutons.
About Kareem
Senior React Native Developer | Full-Stack & AI Automation (n8n)
100%
Job Success
Nasr City, Egypt - 7:48 am local time
I’m a Senior React Native and Full-Stack Developer with 7+ years of experience building, maintaining, and improving digital products. I can take ownership of a complete product from requirements to production, or join an existing codebase to implement features, solve complex issues, and improve performance and maintainability.
MOBILE APP DEVELOPMENT
• React Native development for iOS and Android
• Expo and React Native CLI applications
• Authentication, payments, push notifications, maps, and geolocation
• REST API and third-party service integrations
• App upgrades, debugging, performance optimization, and maintenance
• Reusable architecture and production-ready feature development
HEALTHTECH & TELEMEDICINE
• Patient-facing mobile applications and appointment booking
• Secure video consultation workflows and Zoom Video SDK integration
• Medical history, digital prescription, and notification experiences
• Health insurance platform integrations and standalone telemedicine solutions
• Wellness, accessibility, and veterinary care products
WEB & FRONTEND DEVELOPMENT
• Angular, React, and Next.js web applications
• Responsive platforms and admin dashboards
• E-commerce, marketplace, booking, and business management systems
• API-driven interfaces and complex business workflows
• Existing frontend maintenance, modernization, and performance improvements
BACKEND & API DEVELOPMENT
• Node.js and Express.js backend development
• REST API design and integration
• MongoDB and application data management
• Authentication, authorization, and business logic
• Payment gateways, notifications, and third-party integrations
• Backend services supporting mobile and web applications
AI INTEGRATION & AUTOMATION
• n8n workflow automation
• OpenAI API and AI-powered feature integrations
• Webhooks and multi-step business workflows
• Connecting applications, APIs, databases, and third-party tools
• Automating repetitive operations and data processing
• Human-reviewed AI workflows and practical business automation
My experience includes automotive marketplaces, telemedicine and wellness apps, veterinary care platforms, university systems, booking products, e-commerce, real estate, and enterprise applications. I’m comfortable building from scratch, extending existing systems, and resolving production issues without disrupting working features.
I focus on clear communication, maintainable code, reliable integrations, and practical engineering decisions. Whether you need a React Native app, an Angular or Next.js platform, a Node.js backend, a HealthTech solution, or AI-powered n8n automation, I can help turn the requirements into a reliable production-ready product.
Steps for completing your project
After purchasing the project, send requirements so Kareem can start the project.
Delivery time starts when Kareem receives requirements from you.
Kareem works on your project following the steps below.
Revisions may occur after the delivery date.
Design, build, secure, test, and document
I confirm the API contract, implement routes and data models, add validation and security, test agreed flows, prepare documentation, and deliver source code with deployment guidance.