I will develop custom rest apis and integrate third party apis


About this gig
Need a reliable API developer to connect your applications, services, or business systems?
I can develop custom REST APIs and integrate third-party APIs into your website, web application, or existing software.
What I Can Build
- REST APIs
- Third-Party API Integrations
- Payment Integrations
- Authentication Systems
- Database APIs
- Webhook Integration
- API Automation
- Data Synchronization
- Service Integrations
- Custom Backend Services
What You Get
- Custom REST API development
- Third-party API integration
- Backend services and business logic
- Database connectivity
- Authentication and authorization
- Webhooks and data synchronization
- Clean and structured implementation
- Solutions tailored to your requirements
- Whether you need a new API, want to connect external services, or need to extend an existing application, I can build the integration around your specific requirements.
Have an API project in mind? Message me before ordering so we can discuss the requirements and scope.
Get to know Masha P.
Software Engineer, Web Developer, Designer
- FromSri Lanka
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English
Other Software Development Services I Offer
FAQ
Can you develop a custom REST API?
Yes. I can develop custom REST APIs with endpoints, business logic, database connectivity, authentication, validation, and error handling based on your requirements.
Can you integrate third-party APIs?
Yes. I can connect your application with external APIs and services based on their available documentation and integration requirements.
Can you integrate payment APIs?
Yes. I can integrate supported payment services into your application. Please contact me first so we can discuss the specific payment provider and requirements.
Can you work with an existing API?
Yes. I can troubleshoot, modify, extend, or integrate an existing API into your application.
Can you build API authentication?
Yes. I can implement authentication and authorization using appropriate methods such as API keys, JWT, OAuth, or other supported approaches.
Can you integrate webhooks?
Yes. I can create or integrate webhook functionality for receiving and processing real-time events from external services.
Can you connect an API to a database?
Yes. I can develop API functionality that communicates with your database and handles the required data operations.
Can you provide API documentation?
Yes. API documentation can be included depending on the package and project requirements.
Should I contact you before ordering?
For complex integrations, multiple APIs, payment systems, or large API projects, please contact me first so we can discuss the scope.

