What is SOA and Web Services?

Most applications are developed to interact with users; the user enters or searches for data through an interface and the application then responds to the user's input. A Web service does more or less the same thing except that a Web service application communicates only from machine to machine or application to application. There is often no direct user interaction. A Web service basically is a collection of open protocols that is used to exchange data between applications. The use of open protocols enables Web services to be platform independent. Software that are written in different programming languages and that run on different platforms can use Web services to exchange data over computer networks such as the Internet. In other words, Windows applications can talk to PHP, Java and Perl applications and many others, which in normal circumstances would not be possible.

There are several design models for web services, but the two most dominant are SOAP and REST.


SOAP – Simple Object Access Protocol – is probably the better known of the two models.

SOAP relies heavily on XML, and together with schemas, defines a very strongly typed messaging framework. Every operation the service provides is explicitly defined, along with the XML structure of the request and response for that operation. Each input parameter is similarly defined and bound to a type: for example an integer, a string, or some other complex objects.

All of this is codified in the WSDL – Web Service Description (or Definition, in later versions) Language. The WSDL is often explained as a contract between the provider and the consumer of the service. In programming terms the WSDL can be thought of as a method signature for the web service.


REST – REpresentational State Transfer – is quickly becoming the preferred design model for public APIs. Some interesting statistics regarding the growth of REST in the public sphere are available at, for example, the Programmable Web.

REST is an architectural style, unlike SOAP which is a standardized protocol. REST makes use of existing and widely adopted technologies, specifically HTTP, and does not create any new standards. It can structure data into XML, YAML, or any other machine readable format, but usually JSON – JavaScript Object Notation – is preferred. As can be expected from JavaScript, the objects are not strongly typed. REST follows the object oriented programming paradigm of noun-verb. REST is very data-driven, compared to SOAP, which is strongly function-driven. In the REST paradigm, metadata is structured hierarchically and represented in the URI; this takes the place of the noun. The HTTP standard offers several verbs representing operations or actions you can perform on the data, most commonly: GET, POST, PUT, and DELETE.


Benefits of Web Services

Based on industry standards

Once a software developer learns how to use a web service, the learning curve is greatly reduced for other web services that follow the standards.

Development tool independence

Any development tool that supports the web service standard should be able to access the data and services provided by the web service.

Insulation from future changes

Web services attempt to keep the web service interface unchanged, even though the data and code behind the web service may change in future versions of a product. This helps applications that use the web service to continue working properly, even though the application behind the web service has changed.

Secure access to data

Web services can tightly control access to the data and services they make available to other applications.


Our Capabilities

A company's technology organization should support its business strategy, not constrain it. OHM Tech Inc. focuses first on the strategic needs of our clients' businesses to determine the technology capabilities needed to support their long-term goals. We help companies address technology-related decisions and ensure their IT organizations and operating models are agile and effective, equipping them to cut through the noise of fleeting technology trends to create enduring results.


IT Strategy

  • Technology helps companies transform themselves and grow their business.

  • Heavily technology-dependent to identify the optimal future state of IT

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Focused Service Provider

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  • Expertise in each area of the Software Development Lifecycle (SDLC)

  • Excellence in development technologies

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Mature Processes

  • CMMI-compliant methodologies, perfected over a decade of practice, and specifically designed for geographically distributed (nearshore / offshore / onsite) projects.

  • Measurable project metrics

  • High level of internal control and efficiency


  • Cultivated long term client relationships

  • Compound annual growth rate - CAGR: 60% (over past 3 years)

  • Employee retention rate: 90%

  • Strong group financial position

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Easy to work with

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  • Engineers with experience gathered from projects implemented all over the world

  • Advanced technological infrastructure and security system for maximum client confidence


About Us

Outstanding Human Minds - OHM Tech has a span history of growth and success. Founded in 2006 by a technologist, OHM started off as an IT consulting partner for one of the most recognized brands in the telecommunication industry. With steady and planned growth, OHM’s vision went global in the year 2012, with introduction of offshore operations in Noida, India. OHM has grown organically through strategic planning and vision. In 2016, OHM celebrated its 10th anniversary with 4 global offices, and further expansion is inevitable.

OHM Tech is a global Information Technology firm specializing in Software Development, IT staffing, and Business Process Transformation. OHM Tech, Inc. is devoted to provide quality information technology consulting to its clients by combining dedicated, focused, ethical efforts with talented, experienced professionals.  Know more

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