Custom API Development and Integration Services

Raj Pathak

Starting at

/hr

About this service

Summary

Need APIs that actually work for your business? I design, build, and integrate custom APIs that connect apps, scale with traffic, and stay secure. From RESTful endpoints to cloud-native integrations, I ensure your systems talk to each other smoothly.

Whether you need a new API from scratch or want to integrate third-party services into your app, I’ll make it clean, fast, and future-ready.

Process

Understand the data flow, business logic, and integration needs

Plan scalable, secure, and well-documented API endpoints

Build REST APIs with Python (Django REST Framework), following best practices

Connect APIs with your app, third-party platforms, or internal systems

Use Postman and automated tests to ensure endpoints work flawlessly

Deploy on AWS, containerize with Kubernetes, and ensure monitoring

Provide clear API docs and support for smooth adoption

FAQs

Can you integrate third-party APIs into my existing app?
Yes, I can connect CRMs, payment gateways, shipping APIs, or any external service.
Do you handle security for APIs?
Absolutely—authentication, authorization, and data protection are always included.
What if I need my API to scale?
I design APIs with cloud-native practices so they handle growth without breaking.

What's included

REST API built with Django REST Framework
Fully functional, secure, and scalable endpoints designed for your specific business logic.
Codebase integration + documentation
Smooth connection of external services (payment, CRM, ERP, shipping, etc.) into your system.
Swagger/Postman collection
Developer-friendly API docs for easy adoption and collaboration
AWS/Kubernetes deployment
API hosted on the cloud with scaling, monitoring, and CI/CD pipelines (if required).

Recommendations

(4.5)

Scott Knowles

Client • Aug 9, 2025

Recommended

Raj is very personable and has been the ideal consultant to work with on this project. He quickly understood project requirements, challenges and tradeoffs and how to integrate these various platforms and technologies together.

Rachelle Yee • Needle

Client • May 13, 2025

Recommended

Raj did an good job with our Shopify development. His deep knowledge of the platform and problem-solving skills made the process smooth and efficient.

Skills and tools

Backend Engineer

DevOps Engineer

Fullstack Engineer