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Roman Vashchegin

Roman Vashchegin

Kaliningrad, Kaliningrad Oblast, Russia
Member since August 8, 2013
Roman is a SharePoint and .NET developer with a proven ability to develop efficient, scalable, and fault-tolerant solutions for complex problems. He has quality experience and skills in all stages of software development, and an excellent knowledge of fundamental algorithms and data structures.
Roman is now available for hire
  • STO Solutions, Inc.
    ASP.NET MVC, NHibernate, Backbone.js, AWS, Hangfire, SQL Server, NUnit
  • TapJets, Inc.
    .NET Core, RabbitMQ, Entity Framework, AngularJS, Identity Server 4
  • Transwestern
    SharePoint, Entity Framework, jQuery UI, C#, ASP.NET, EWS, Nintex Workflow 2010
  • Algorithms, 12 years
  • Data Structures, 12 years
  • .NET, 9 years
  • C#, 9 years
  • SharePoint, 8 years
  • Nintex Workflow, 2 years
  • SharePoint 2016, 2 years
  • .NET Core, 1 year
Kaliningrad, Kaliningrad Oblast, Russia
Preferred Environment
Windows, Visual Studio, TFS, SVN, Git
The most amazing...
...thing I've done is optimization of SQL scripts and stored procedures for HarePoint Analitics for SharePoint that prevent license refund on more than 40000$
  • Senior .NET Engineer
    STO Solutions, Inc.
    2017 - PRESENT
    • Developed and supported components of a healthcare system.
    • Optimized SQL scripts and stored procedures.
    • Built a system for importing huge amounts of data into the database.
    • Developed unit tests and integration tests.
    Technologies: ASP.NET MVC, NHibernate, Backbone.js, AWS, Hangfire, SQL Server, NUnit
  • Web Developer
    TapJets, Inc.
    2016 - 2017
    • Developed some functionality on the main company website.
    • Built a partner portal for air carriers.
    • Created a server API for an internal mobile application for aircraft pilots.
    • Developed a web scraper for the Avinode website on Selenium WebDriver.
    Technologies: .NET Core, RabbitMQ, Entity Framework, AngularJS, Identity Server 4
  • SharePoint Developer
    2014 - 2016
    • Designed and supported (now based on SharePoint 2010.
    • Designed and supported Transwestern's internal portal ( based on SharePoint 2010.
    • Designed, developed, and supported an internal web application for building engineers with usage Nintex Workflow 2010. (
    • Developed and supported a new Transwestern portal ( The front-end was developed on MVC4, and the back-end on SharePoint 2016.
    • Supported an internal portal for buildings ( based on SharePoint 2010.
    • Designed, developed, and supported an internal web application for banking (check routing and cash management).
    Technologies: SharePoint, Entity Framework, jQuery UI, C#, ASP.NET, EWS, Nintex Workflow 2010
  • Web Developer (Part-time)
    2013 - 2014
    • Designed and developed a portal for a language school "Expert."
    Technologies: ASP.NET, C#
  • Project Manager, SharePoint Developer (Full-time)
    MAPILab, Ltd.
    2013 - 2014
    • Optimized the SQL database, halving storage size and allowing T-SQL scripts to run ten times as fast.
    • Created a custom tool for product diagnosis and control.
    • Prevented three potential license refunds worth over $40,000.
    Technologies: C#, ASP.NET, ADO.NET, WinForms, JavaScript, jQuery, T-SQL
  • SharePoint Developer (Part-time)
    2012 - 2013
    • Extended and improved the custom SharePoint workflow for a big retailer.
    • Created several features for the "MRSK Holding" portal.
    Technologies: C#, SharePoint 2007/2010/2013, ASP.NET, jQuery
  • SharePoint Developer (Full-time)
    MAPILab, Ltd.
    2009 - 2012
    • Created a custom GeoChart control tool to show visit counts and page views by country and city.
    • Implemented various tool features for exploring the SharePoint server-side object model.
    • Created a migration tool for SharePoint Analytics databases. Allowed for migration of analytics databases across environments, including between farms of different versions of HarePoint.
    • Developed a data collector and several reports for a performance reporting group. Worked with the CPU, memory, hard disk, and network.
    • Created a tool allowing users to subscribe to a report and receive it in PDF/XSLX format by email.
    • Developed a custom search engine of HarePoint HelpDesk data for SharePoint.
    • Implemented a custom data source for HarePoint HelpDesk supporting fast displaying, paging, sorting, and SharePoint list data filtering.
    • Implemented custom admin group workflow activities and conditions for HarePoint Workflow Extensions.
    Technologies: C#, ASP.NET, SharePoint 2007/2010/2013, WinForms, ADO.NET, JavaScript, jQuery
  • HarePoint Analytics for SharePoint (Development)

    Formerly MAPILab Statistics for SharePoint, HarePoint is a web analytics solution for detailed information on the performance of SharePoint-based portals and websites. Product reports include users and their behavior, as well as usage of content, documents, list items, and search services. The product provides essential information on portal usage for IT managers, project managers, web editors, and business managers.

  • HarePoint HelpDesk for SharePoint (Development)

    HarePoint HelpDesk for SharePoint is a ready-made customer support system for internet and intranet sites based on the SharePoint platform. It allows users to create efficient systems for processing incoming support requests. The product is easily deployed and immediately ready for use.

  • HarePoint Explorer for SharePoint (Development)

    A universal accessory tool to simplify the development of solutions for Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server ‚Äč2007, 2010, and 2013.

  • HarePoint Workflow Extensions (Development)

    HarePoint Workflow Extensions provides over 200 new 'ready-to-use' activities for Microsoft SharePoint workflow development. It is fully supported by all Microsoft workflow development tools and does not require any adjustment of workflows or learning of new development tools. The product benefits users of SharePoint Designer 2010, 2013, Microsoft Visual Studio 2010, 2013, and in Microsoft Visio 2010.

  • Programming Contests (Other amazing things)

    Over seven years of experience in the largest computer programming contests: (ACM ICPC, TopCoder, Google Code Jam, Facebook HackerCup, Russian CodeCup, Russian AI Cup).

    Semifinalist, Google Code Jam, 2008
    Third Diploma, Semifinal ACM ICPC (NEERC), 2007-2010
    Finalist, Russian AI Cup, 44th place (

  • Transwestern Public Website (Development)

    A public-facing site for Transwestern.

  • Conquer String Search with the Aho-Corasick Algorithm (Publication)
    The Aho-Corasick algorithm can be used to efficiently search for multiple patterns in a large blob of text, making it a really useful algorithm in data science and many other areas. In this article, Toptal Freelance Software Engineer Roman Vashchegin shows how the Aho-Corasick algorithm uses a trie data structure to efficiently match a dictionary of words against any text.
  • Languages
    T-SQL, C#, JavaScript
  • Frameworks
    ASP.NET, ADO.NET, .NET, AngularJS, Entity, ASP.NET Core, NHibernate, NUnit, .NET Core, MVC 4.5, Bootstrap, Hadoop, Angular Material, WPF, Silverlight, Angular
  • Tools
    SharePoint Designer, Visual Studio, Microsoft Office 365, Hangfire, RabbitMQ
  • Paradigms
    Object-oriented Programming (OOP), Code First
  • Platforms
    SharePoint, SharePoint 2007, SharePoint 2013, SharePoint 2010, Windows, SharePoint 2016, Nintex Workflow, Azure, Exchange Web Services
  • Misc
    Algorithms, Data Structures, DevExpress, SharePoint Online
  • Libraries/APIs
    WMI, SharePoint API, jQuery, REST API, jQuery UI, Backbone.js, Selenium WebDriver, Facebook API, Vue.js
  • Storage
    Microsoft SQL Server, SQLite
  • Master's degree in Mathematics and Computer Science
    Baltic Federal University of Immanuel Kant - Kaliningrad
    2005 - 2010
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