I will build java spring boot rest apis and integrate third party apis


About this gig
Have a Java Spring Boot REST API that needs to be developed, improved, or connected to an external service? I can help you build practical, well-structured APIs and integrate them with the systems your application depends on.
I've completed 50+ projects and focus on delivering quality work, clear communication, and long-term client relationships.
Here's how I can help:
- Java Spring Boot REST API development including CRUD operations with Spring MVC, Data JPA, Hibernate, and databases
- REST API integration with third-party service such as payment gateways, email, sms, crm, erp, Google Sign-In and cloud services
- Connecting APIs with external applications and platforms
- API request and response handling
- Authentication and authorization integration
- API debugging and error handling
- API testing and documentation
Whether you need a new REST API or want to connect your Spring Boot application to an existing service, I'll take time to work towards a solution that fit your needs. I aim to write clean, maintainable code and explain what has been implemented so you can move forward with confidence.
Let's build build and connect your application to the services it needs
Get to know David Devv
Java Full Stack Developer, Web Apps and Bug Fixes
- FromUnited States
- Member sinceOct 2026
- Avg. response time1 hour
Languages
English, German, Italian, Spanish, French
FAQ
Can you build a REST API from scratch using Java Spring Boot?
Yes. Share your requirements, expected endpoints, and data structure. I'll review the scope and confirm the deliverables before starting.
Can you integrate a third-party API into my existing application?
Yes. Please provide the API documentation and explain what information your application needs to send or receive. I'll confirm compatibility and scope first.
Can you connect my Spring Boot API to MySQL?
Yes, for projects within the agreed scope. Tell me about your database structure and the operations your application needs.
Can you fix errors in an existing Spring Boot API?
Yes, if the issue is within my technical capabilities. Share the error message, relevant code, and steps to reproduce the problem so I can assess it.
Do you provide API testing and documentation?
Testing and documentation are included according to the package you select. Additional requirements can be discussed before ordering.
What do you need from me to get started?
Please provide your project requirements, expected API behavior, relevant documentation, and existing code if applicable. Never send live production secrets or payment credentials.
Can you work with an API that requires authentication?
I can assess authentication requirements before confirming the order. Please share the provider's documentation and authentication method. Complex security requirements may need a custom offer.

