I will build or fix salesforce API integrations


About this gig
Do you need a secure custom API that allows an external application to communicate with Salesforce?
I will design and develop custom Apex REST web services based on your requirements and Salesforce data model.
Services include:
- Custom Apex REST endpoints
- GET, POST, PUT, PATCH and DELETE
- JSON request and response wrappers
- Input validation and business rules
- Structured success and error responses
- Salesforce queries and record updates
- Bulk-safe Apex development
- Sharing and security considerations
- Apex test classes
- Postman collection
- Endpoint and payload documentation
- Deployment preparation
The API will follow an agreed scope for reliable communication between Salesforce and external systems.
- Before ordering, please provide:
- Calling application
- Required HTTP methods
- Sample request and expected response
- Salesforce objects and fields
- Business validations
- Required create, query, update or delete actions
- Authentication method
- Sandbox and deployment needs
Please contact me before ordering so I can confirm the scope, package and delivery time.
Get to know Rajeenthiran T
Salesforce Developer
- FromCanada
- Member sinceMar 2026
Languages
English
FAQ
Do I need to message you before ordering?
Yes. Please send the API documentation, endpoint, authentication method and error details so I can confirm the package.
Can you work with REST and SOAP APIs?
Yes. I support REST, SOAP, JSON and XML integrations.
Can you fix OAuth or Named Credential errors?
Yes. I can troubleshoot OAuth, JWT, External Credentials, Named Credentials and common authentication failures.
Will you provide Apex test classes?
Test classes are included in the Standard and Premium packages.
Can you deploy to production?
Production deployment can be included after validating the solution in a sandbox.

