Custom API Integration & Development Services

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Types of our API development and integration services

Patternica mostly focuses on launching the tech API integration for websites, but we also cope with the task of connecting API with apps and various business systems. Check out our list of services!

Custom API integration
We build seamless, secure links between your software and external services like CRMs, payment gateways, and logistics platforms. Our developers work with REST, SOAP, and HTTP/HTTPS protocols using technologies like .NET, Node.js, Java, and Go to ensure compatibility with your stack.
Custom API implementation
We design and implement scalable APIs tailored to your needs - from internal tools to public endpoints. Using RESTful architecture, we build in Python, Node.js, or Java, and deploy on platforms like AWS, Azure, or GCP for performance and reliability.
Automated API testing
We use modern testing frameworks (Postman, Jest, Pytest, etc.) to automate functional, load, and security testing for your APIs. This helps catch issues early and ensure long-term performance, even under heavy use or frequent updates.
Third-party API integration
We integrate your product with third-party APIs like Stripe, Salesforce, Shopify, and Facebook using secure, well-documented workflows. Our team handles token management, data transformation, and error handling with technologies like Node.js, Python, and cloud-native tools.
API consulting and strategy
Whether you're starting from scratch or scaling existing systems, we help define the right API strategy (architecture, versioning, rate limiting, security, and deployment). We work across platforms like AWS Lambda, Azure Functions, and containerised environments.
Ongoing API maintenance and support
We provide continuous monitoring, bug fixes, and updates to ensure your APIs remain stable and secure. Our team is experienced with CI/CD pipelines, logging systems, and alerting tools to handle issues fast - before they affect your users.

Benefits of using our API integration service

With systems support on API integration, proper app development and user engagement are at stake. Sounds good already? However, we can list the other advantages you’ll get while developing an API with us:

1
Convenience
All the parties who enter the system (i.e., a web application) will see the same features and interface details without experiencing any troubles.
2
Efficient data processing
Tons of information will be extracted from multiple sources and gathered in one place (i.e., a CRM).
3
Speed of realization
As the data is kept in order, APIs will allow building the required solution much quicker.
4
Safety
As APIs give access under conditions of an authorization, the loss of data is reduced to the minimum.
5
Independent control
To make your data or functionality even more secure, there’s an option of setting specific usage rules.
6
Efficiency
API integration service gives an opportunity to apply various fonts, numerous images, and different styles to create a user-friendly interface.
7
Costs reduction
As API relies much on process automation, it also means that you can hire fewer specialists to close your project and save your resources.

Our API integration solutions

We deliver different types of APIs, using REST, and RPC API protocols alongside JSON and CSV for data formats. This allows us to help you expand the business grow through:

Cloud API development

Our developers will guarantee the users’ interrupted and safe access to the software from different devices.

API technical support

When the integration job is already done, Patternica offers you to go further and move to API maintenance to enhance sign-on and encryption capabilities and provide even better security.

Service of API creation: Our major domains

You’re already familiar with our API services and solutions, and now it’s time to highlight their use cases:

Fintech

Payment gateways APIs

Transportation

Shipping carriers APIs and Google Maps API

E-commerce

Shipping carriers APIs and Data resources APIs

cases

Case studies

Our portfolio includes interesting custom API integration cases that demonstrate how various business requests can be translated into tailored solutions.