Custom API Development & Integration

Starting at

$

1,500

About this service

Summary

I specialize in building robust, scalable APIs and seamlessly integrating third-party APIs to enhance your application's functionality. Whether you need a custom API for your platform or help integrating services like payment gateways, CRM tools, or analytics platforms, I deliver efficient and reliable solutions tailored to your needs.

Process

Consultation: Understand your business needs and API requirements.
Design: Create a detailed plan for the API structure or integration.
Development: Build custom APIs or implement third-party integrations.
Testing: Perform functional and performance testing to ensure reliability.
Delivery & Support: Provide the final solution along with ongoing support if needed.

FAQs

  • What types of APIs can you build?

    I specialize in building RESTful and GraphQL APIs, custom APIs for specific business needs, and integrations with third-party services such as payment gateways, CRMs, and analytics platforms.

  • Can you integrate my existing application with third-party services?

    Yes, I can seamlessly integrate your application with various third-party APIs, including Stripe, PayPal, Google Maps, Salesforce, and others, to enhance its functionality.

  • How do you ensure the security of APIs?

    I follow industry-standard best practices for API security, including token-based authentication (OAuth2, JWT), rate limiting, input validation, and secure data transmission using HTTPS.

  • Do you provide API documentation?

    Yes, I deliver comprehensive API documentation to ensure easy integration and use by developers, including examples, endpoints, and parameters.

  • What programming languages and tools do you use for API development?

    I primarily use Node.js, .Net, Python, and Go for API development, along with tools like Postman for testing and debugging. I can also work with AWS Lambda and serverless frameworks.

  • Can you help maintain and scale the API after development?

    Yes, I offer ongoing support, maintenance, and performance optimization to ensure your API remains reliable and scalable as your needs grow.

  • How long does it take to develop an API?

    The timeline depends on the complexity of the API. A basic API can take 1-2 weeks, while more complex integrations or custom APIs may take 3-4 weeks.

  • Do you offer post-launch support?

    Absolutely! I provide post-launch support, including bug fixes, performance monitoring, and updates to meet evolving business requirements.

What's included

  • Custom API Development

    Design and build RESTful or GraphQL APIs tailored to your business requirements.

  • Third-Party API Integration

    Seamless integration with services such as Stripe, PayPal, Google Maps, Salesforce, and others

  • API Documentation

    Comprehensive and easy-to-follow documentation for developers using your API.

  • Performance Optimization

    Ensure fast, efficient, and secure API performance, even under high loads

  • Testing & Debugging

    Thorough testing to ensure reliability, including functional and load testing

Recommendations

(5.0)

James Brooks

Client • Jan 8, 2025

Working with Justin was an exceptional experience! He played a crucial role in a startup project that involved API integration with AI-powered solutions. His deep technical expertise in full-stack development, combined with his ability to deliver scalable and reliable solutions under tight deadlines, was key to the project's success. Justin is not only highly skilled in React, Node.js, and cloud technologies but also a great collaborator, always willing to go the extra mile. He's a nice talent!


Duration

2 weeks

Skills and tools

Automation Engineer
Backend Engineer
DevOps Engineer
AWS Lambda
Docker
GraphQL
Kubernetes
Postman

Industries

Banking
Health Care
E-Commerce

Work with me