Custom API Development

Custom API Development & Integration Services

KarnaniSOFT app developers offer their deep expertise in the industry for clients who are willing to make their services mobile, reach a wider audience, and get the most out of implementing modern technologies into their business strategies. 

KarnaniSOFT’s developers-for-hire provide robust API development and third-party API integration services using REST, SOAP, XML, and RPC API protocols, extending the functionality of your current application with new and existing third-party systems & devices.

Custom API Integrations

Custom API Implementations

API Development Platforms

Automated API Testing

Custom API Integrations
We can build a custom API to enhance your current off-the-shelf solution or integrate a third-party API that enables your software solution to seamlessly interface with other apps, devices, and business systems.
Custom API Implementations

We implement internal and external API development solutions that preemptively solve issues regarding communications, content creation & management, data sharing, business logic, and micro services.

Automated API Testing

Our engineers and quality assurance (QA) specialists use automated unit testing, functional testing, and load testing best practices to check the performance & functionality of mission-critical business apps.

API Development Platforms
Our mobile, desktop, and cloud application API development services incorporate developing service-oriented architectures (SOA), browsers, web sockets, operating systems, firmware/hardware, databases, and more.

KarnaniSOFT's API Service Solutions

We deliver all types of robust and secure APIs, including API as a Service (APIaas) and web APIs, using REST API protocols, along with Java, JSON, AJAX, SOAP, HTTP/HTTPS, XML, XHTML, TCP/IP, and EDI development services.

Third-Party API Integrations

We harness the power of popular Microsoft platforms, including Azure, Jitterbit, Dell Boomi, Anypoint, Funnel, and more, adding superior web functionality and integrating disparate business systems with existing applications.

Cloud API Development

We provides API compliance for safe and secure cloud API development. SaaS, IaaS, PaaS, and APIaaS allow our developers to ensure seamless user access across all platforms and mobile devices.

API Maintenance & Support

We provide API maintenance services to ensure that everything is running smoothly and securely, developing API architecture encryptions for security, single sign-on capabilities, dashboard controls, RBAC modules, and more.

Microservices Consulting

We will categorize your current monolithic applications into a broken-down suite of micro-services, thus allowing each service to be configured to operate as a unique process and can be modified independently.

What is an API?

API is an acronym for Application Programming Interface that software uses to access data, server software or other applications and have been around for quite some time. In layman’s terms, it is a software intermediary that allows two applications to talk to each other. Think of an API as a translator between two people who don’t speak the same language but can communicate using a go-between APIs are very versatile and can be used on web-based systems, operating systems, database systems and computer hardware.
Developers use APIs to make their jobs more efficient by reusing code from before and only changing the part that is relevant to the process they want to improve. A good API makes it easier to create a program because the building blocks are in place. APIs uses defined protocols to enable developers to build, connect and integrate applications quickly and at scale. Now that you have a better understanding of what an API is let’s look at how they work.

How Does An API Work?

APIs communicate through a set of rules that define how computers, applications or machines can talk to each other. The API acts as a middleman between any two machines that want to connect with each other for a specified task.
A simplified example would be when you sign into Facebook from your phone you are telling the Facebook application that you would like to access your account. The mobile application makes a call to an API to retrieve your Facebook account and credentials. Facebook would then access this information from one of its servers and return the data to the mobile application.

Why Choose KarnaniSOFT API Development Company


Our API specialists, who have extensive experience in providing API development and integration services, using C, C++, Java, Python, and PHP, create powerful, secure, and easily maintainable APIs. Our API masters has technical expertise in working with the most popular APIs such as Google APIs, Yahoo APIs, Social Media APIs (Twitter, Facebook, LinkedIn, Instagram), Marketplaces APIs (eBay), other APIs, and mashups.


Hire our dedicated API developers and get significant cost-savings. Why? First, we live and work in Belarus, thus, the total cost of your project will be much cheaper than the cost of the same project development in Western Europe or the USA. Secondly, our skilled and experienced developers leverage the latest technologies and follow best practices, so our APIs are built secure and high-performance that lets avoid wasting time and money on support and maintenance.

Custom API development

We apply individual approach while strictly following the REST architecture. We provide clean and well-structured programming code, use best development tools, and build high-performance APIs for your needs.


We are experts in creating new APIs and integrating your application with an interface of an existing API. Our team of experienced IT specialists offer API development and integration services, providing you with a custom rich in functions API solution.

Our Process

We listen to you, we listen to each other, we show empathy and involve everyone in how we move forward and improve. When we think, you can almost hear us whirring. This is what gives us our edge.

Discover & Define

By understanding what makes your business unique we can translate your requirements into a coherent software programme.

Design & Build

Our experienced in-house teams will deliver your project to its exact requirements.

Support & Partner

We can stabilise your current systems and then support and future proof your technology. We build long standing client relationships founded on transparency.

Develop a high-quality API to meet your present and future business needs

Basically, APIs are fundamentally changing how data can be used. This concept is opening up new business models and strategies for products. Our API development company has recognized this shift and the importance of APIs.

Over the past years, we’ve improved our capabilities in this area to become one of the leading experts in custom API development and integration. ColorWhistle’s professional developers will integrate the API according to your requirement to enrich and enhance the services you offer in a new and creative way.

Get in touch with our custom API developers to find out how our custom API development services can help you overcome tech-related problems

Business Benefits of Using Custom APIs

Allows apps like CRMs, ERPs, communication, and marketing automation platforms to communicate with each other to enhance the personalization that an organization requires

  • increased productivity,
  • increased innovation,
  • increased employee engagement and collaboration,
  • increased speed in meeting line-of-business user demands,
  • greater agility across teams for self-serve IT,
  • a decrease in operational costs,
  • revenue growth, and,
  • potential for identifying new business and revenue models.
software development solution

We transform businesses

We Provide multipurpose school management ERP which aids in automating the school’s daily operations hassle-free and provide insightful reports and 360-degree tracking so that the stakeholders can make better and faster decisions to escalate the productivity of their institution.

Services / Custom API Development

WHY US Our goals are to provide affordable, superior service with high customer satisfaction levels.