API Development and Integration

Kelechi Nwaji

Starting at

$

2,500

/mo

About this service

Summary

I design and develop scalable, secure, and high-performance APIs tailored to your business needs. From custom API architecture and third-party integrations to real-time communication and microservices development, I ensure seamless connectivity between systems. With a focus on clean, maintainable code, robust security, and detailed documentation, I deliver APIs that are easy to use, well-documented, and optimized for performance, making integration smooth for developers and businesses alike. 🚀

Process

Discovery Call: We'll discuss your project requirements, goals, and technical specifications. If you need API design from scratch, I’ll help define the architecture. If integrating with third-party services, I’ll review existing documentation to ensure a seamless setup.
Planning & Specification: I’ll outline the API structure, authentication methods, database models, and necessary integrations. You’ll receive a clear plan, including endpoints, data flow diagrams, and security measures.
API Design & Development: I’ll build a scalable, high-performance API using technologies like Node.js, NestJS, and Fastify. The implementation will follow best practices for security, error handling, and maintainability. You'll receive regular updates and opportunities to provide feedback.
Testing & Optimization: I’ll conduct unit and integration testing using Jest, Postman, or Newman, ensuring the API functions as expected. Performance optimizations like caching (Redis) and rate limiting will be implemented for speed and security.
Deployment & Documentation: Once finalized, I’ll deploy the API on a cloud provider like AWS, DigitalOcean, or Vercel, ensuring scalability and uptime. You’ll also receive comprehensive API documentation (Swagger/Postman Collection) for easy integration.
Post-Launch Support & Maintenance: After deployment, I offer ongoing support for bug fixes, updates, and performance monitoring. If required, we can set up a CI/CD pipeline to automate future deployments efficiently.

FAQs

  • Can you work with our existing API infrastructure?

    Yes! I can integrate with your existing API or enhance its functionality while ensuring it remains scalable, secure, and efficient.

  • What technologies do you use for API development?

    I primarily use Node.js, NestJS, Express, and Fastify for backend development, with PostgreSQL, MongoDB, and Redis for database management. I also implement caching, security best practices, and performance optimizations.

  • Can you integrate third-party APIs into our system?

    Absolutely! I have experience integrating various third-party services, including payment gateways (Stripe, PayPal), messaging platforms (Twilio, WhatsApp API), and cloud services (AWS, Firebase).

  • How do you ensure API security?

    I implement JWT authentication, OAuth 2.0, API rate limiting, input validation, and encrypted data storage to protect against security threats like unauthorized access, data breaches, and API abuse.

  • Will the API be well-documented?

    Yes! I provide detailed API documentation using Swagger (OpenAPI), Postman Collections, or Markdown guides to ensure seamless integration for developers.

  • Can you help with API hosting and deployment?

    Yes! I can deploy your API on AWS, DigitalOcean, Vercel, or your preferred cloud provider, ensuring high availability and scalability. I also offer CI/CD pipeline setup for automated deployment and updates.

  • What if we need additional features after the API is built?

    The API will be built with extensibility in mind, allowing for easy feature additions and modifications in the future. I’m available for continued development and enhancements.

  • Do you offer post-launch support and maintenance?

    Yes! I offer ongoing support for bug fixes, performance monitoring, and feature updates to ensure your API remains reliable and efficient over time.

What's included

  • API Architecture & Documentation

    I will design a well-structured API architecture tailored to your business needs. This includes defining clear data models, authentication strategies, and endpoint structures. You will receive comprehensive API documentation (Swagger/OpenAPI or Postman Collection) to ensure seamless developer collaboration and future scalability.

  • Secure Authentication & Authorization

    Your API will be built with robust security measures, including JWT-based authentication, OAuth 2.0 integration, and API key management. Role-based access control (RBAC) or fine-grained permission systems will be implemented to safeguard sensitive data.

  • Endpoint Design & Implementation

    I will develop secure, optimized API endpoints that efficiently handle requests and responses. Whether CRUD operations, complex business logic, or batch processing, each endpoint will be structured for high performance and low latency.

  • Post-Deployment Support & Maintenance

    After deployment, I will provide ongoing support, including bug fixes, performance monitoring, and feature updates, to ensure your API remains functional and up to date.

  • CI/CD Pipeline Setup

    I will implement a CI/CD pipeline using GitHub Actions, Jenkins, or similar tools to automate testing, building, and deployment processes, ensuring smooth, consistent updates to your API.

  • API Hosting & Deployment

    I will deploy your API to cloud providers like AWS, DigitalOcean, or Azure, ensuring scalability and uptime. This includes setting up domain routing, environment variables, and deployment automation.

Skills and tools

Backend Engineer

GraphQL

JavaScript

TypeScript

Industries

B2B
SaaS
B2C

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