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I will create api development rest api integration with node js, express js for backend
Paul
About this gig
Your website or app may have a great idea, but a weak backend, broken API connection, missing endpoint, or unreliable data flow can stop it working properly. I build clean, secure and scalable REST APIs with Node.js and Express.js to connect your frontend, database and third party services.
WHAT I OFFER
- Custom REST API & endpoint development
- Third party API integration
- Backend/API integration
- CRUD operations
- Database connectivity & data synchronization
- Real time Product data synchronization
- Authentication & authorization
- JWT, OAuth 2.0 & API key setup
- Webhook integration
- API validation & error handling
- CORS & middleware configuration
- Postman API testing & debugging
- Swagger/OpenAPI documentation
- API bug fixing & optimization
- Secure backend architecture
- Deployment ready API setup
TECHNOLOGIES
Node.js, Express.js, JavaScript, TypeScript, REST, JSON, Postman, Swagger/OpenAPI
DATABASE
MongoDB, PostgreSQL, MySQL
AUTHENTICATION & AUTHORIZATION
JWT, OAuth 2.0, API Keys, Role-Based Access Control
CLOUD
AWS, DigitalOcean
Need a new REST API, third party integration, webhook, authentication, database connection, or API fix? I can turn your requirements into a reliable backend.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Paul
Paul
API, WordPress l eCommerce Developer l Custom, Scalable Solutions
- FromGermany
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, German, French, Italian, Spanish, Arabic
Hi, I’m Paul, a developer helping businesses, startups, and entrepreneurs build reliable digital solutions that work in the real world.
I specialize in API development, integrations, automation, WordPress, eLearning, and eCommerce solutions using Node.js, Express.js, REST APIs, Shopify, WooCommerce, and modern tools.
I’m passionate about turning complex requirements into simple, scalable systems.
My approach is practical, detail-focused, and result oriented, so you get clean implementation, smooth functionality, and solutions built around your actual business needs.
Other Website Development Services I Offer
FAQ
Can you develop a custom REST API with Node.js and Express.js?
Yes. I can develop custom REST APIs and backend services with Node.js and Express.js, including API endpoints, CRUD operations, request validation, error handling, database connectivity, and structured JSON responses based on your application requirements.
Can you integrate a third-party API into my website or application?
Yes. I can integrate external and third-party APIs into your web or mobile application, including payment, CRM, communication, shipping, AI, social, and other business APIs. I can also handle authentication, data mapping, API requests, responses, and webhooks.
Can you fix API errors, connection issues, or a broken backend integration?
Yes. I can troubleshoot REST API errors, failed requests, authentication problems, CORS issues, incorrect responses, endpoint failures, webhook problems, and frontend-to-backend connection issues. I use tools such as Postman to test and identify API problems.
Can you connect my REST API to a database?
Yes. I can connect your Node.js and Express.js API to databases such as MongoDB, MySQL, or PostgreSQL and build the required CRUD operations, data validation, queries, and API endpoints for reliable data communication.
Can you add secure API authentication and authorization?
Yes. I can implement API authentication and authorization using JWT, OAuth 2.0, API keys, and role-based access control where required. I can also configure protected routes, token validation, permissions, and secure request handling.
Can you build webhooks and real-time data synchronization?
Yes. I can create and integrate webhook endpoints for receiving events and synchronizing data between your application and external services. I can handle payload validation, authentication, event processing, and appropriate responses.
Can you build an API for a new website, mobile app, or SaaS project?
Yes. If you are starting a new application, I can build the backend API around your requirements, including endpoints, database integration, authentication, business logic, third-party API connections, and API documentation.
