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.NET Development Services

We offer individual approach to deliver tailored cost-effective solutions. Putting emphasis on revealing actual business needs and managing project requirements, our team defines the best strategy for:

  • Optimal custom solution development
  • Project risk minimization
  • High solution maintainability

Established development and project management methodologies practiced by Microsoft Certified .NET developers guarantee high development standards and software quality. Our services include:

  • Custom ASP.NET web development
  • 3rd party products and solutions customization
  • Mobile development
  • Existing application improvement, including complete application refactoring
  • Application integration with legacy systems
  • Enterprise application integration
  • Web integration, including payment gateways integration
  • Application migration to .NET
  • Database and data migration
  • Application deployment
  • Application on-going support and maintenance
  • Continuous application improvement

Domain Expertise:

Our company has years of experience in building line of business web applications and internet business solutions. It is complemented by expertise in SaaS development and AJAX, Silverlight and WPF competency invaluable for projects aiming to impact the market by creating an innovative and appealing online service or an alternative to existing on-premise software.

Enterprise Web Applications:

Custom and platform-based ASP.NET enterprise solutions that facilitate information exchange across the organization and its partner network, and accelerate business processes in vital operational areas.

  • Corporate Intranets/Extranets
  • Corporate Internet Portals
  • Enterprise Content Management
  • Document Management
  • Customer Relationship Management
  • Business Intelligence

Rich Internet Applications:

Stable, easy to use, interactive and functional web applications, with great scalability and integration capacity provided by ASP.NET development framework.

  • Internet B2B and B2C Portals
  • Online Stores, Marketplaces and Auctions
  • News and Media Content Distribution
  • Social Networking and Social Commerce
  • Online Games and Entertainment
  • Targeted Web Services

Persistence Layer


To increase application maintainability and workflow transparency we separate data tier from business logic and keep data access and manipulation at the persistence layer — through object-relational mapping with ADO .NET Entity Framework or NHibernate and general-purpose query facilities provided by .NET LINQ.

We are also capable of dealing with solutions which require alignment with the rich capabilities native to Microsoft SQL Server — namely, working with stored procedures, functions and triggers, thus executing, at least partially, business logic at the database level.

Database Management Systems:

XSOSYS widely utilizes Microsoft SQL Server as the primary DBMS which makes .NET application development smooth and cost-effective.

At the same time applications may operate in a heterogeneous environment with multiple database technologies involved. XSOSYS is skilled in a variety of database engines which allows using alternative DBMS’s like MySQL or Derby with .NET solutions.


It is vital for complex applications to support automated data exchange and have versatile integration capabilities. We provide them through competence in WCF and in-depth knowledge of ODATA, .NET Remoting, WSDL, UDDI, XML / XML Schema and HTTP.

Business Logic Layer

Business-driven Development Approach

Whatever the application type and solution domain, your business should be at its core. We use formal approaches for describing and documenting business process (BOM, BPMN and UML notations), thus mitigating vision mismatch risks and laying foundation for smart project planning and resource management.

Workflow-oriented Application Design

When developing web applications that support sophisticated business processes, we concentrates on making configuration, execution and improvement of application workflows easy and understandable for users and administrators. We possess considerable expertise in WF and TPL, which helps us in creating highly manageable, productive and user friendly applications.

Application Life Cycle, Extensibility and Maintainability

  • Experienced in MEF and Castle Projects
  • Experienced in WCF
  • Utilizing proven development patterns
  • Delivering clean, well-commented code
  • Providing full project and application documentation
  • Ensuring smooth knowledge transfer