You will get I will integrate third party APIs and payment gateways into your system
Project details
Need to integrate a third-party API or payment gateway into your application?
I provide reliable backend integrations for PHP applications, SaaS platforms, and custom web systems. Whether you need a payment gateway, external REST API, authentication provider, or webhook integration, I focus on building secure, maintainable, and production-ready solutions.
My services include:
• Third-party REST API integration
• Payment gateway integration
• Authentication (OAuth, JWT, API Keys)
• Webhook implementation
• Error handling and validation
• API testing and debugging
• Performance optimization
• Clean, well-documented code
Every integration is developed with attention to security, maintainability, and scalability. I follow modern backend development practices and provide source code along with implementation guidance when required.
If your project requires custom business logic or multiple system integrations, please contact me before ordering so we can determine the most suitable scope.
I provide reliable backend integrations for PHP applications, SaaS platforms, and custom web systems. Whether you need a payment gateway, external REST API, authentication provider, or webhook integration, I focus on building secure, maintainable, and production-ready solutions.
My services include:
• Third-party REST API integration
• Payment gateway integration
• Authentication (OAuth, JWT, API Keys)
• Webhook implementation
• Error handling and validation
• API testing and debugging
• Performance optimization
• Clean, well-documented code
Every integration is developed with attention to security, maintainability, and scalability. I follow modern backend development practices and provide source code along with implementation guidance when required.
If your project requires custom business logic or multiple system integrations, please contact me before ordering so we can determine the most suitable scope.
Programming Languages
PHP, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$100
|
Standard
$300
|
Advanced
$800
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
About Kirill
Engineering Owner | Backend Systems (PHP / Fintech / APIs)
Podgorica, Montenegro - 5:10 am local time
I architect and build scalable PHP (Symfony/Laravel) systems including payment workflows, integrations, and high-load MySQL databases.
I have led backend design decisions in production systems, improving database performance by up to 8x through query optimization and architectural redesign.
My focus is system reliability, scalability, and real-world production delivery — not prototypes.
Steps for completing your project
After purchasing the project, send requirements so Kirill can start the project.
Delivery time starts when Kirill receives requirements from you.
Kirill works on your project following the steps below.
Revisions may occur after the delivery date.
Review requirements
I review your requirements, API documentation, and technical environment.
Implementation
I develop and integrate the required API or payment gateway into your application.