Alexander Velichkin, .NET Developer in Voronezh, Voronezh Oblast, Russia
Alexander Velichkin

.NET Developer in Voronezh, Voronezh Oblast, Russia

Member since May 23, 2017
Alexander is a .NET developer offering more than eight years of experience in leading small teams designing web, desktop, and mobile applications with a passion for .NET Core, Angular, and DevOps. Alexander excels at delivering reliable and innovative strategies and solutions that enhance the performance of existing applications and drive business growth.
Alexander is now available for hire




Voronezh, Voronezh Oblast, Russia



Preferred Environment

TFS, Git, DataGrip, VS Code, Visual Studio

The most amazing...

...project performance I've analyzed and improved was for a web-based application with heavy reports and thousands of users working simultaneously.


  • Senior C# .NET Developer

    2018 - PRESENT (via Toptal)
    • Eliminated spam by creating a Regex-based, back-end service that communicates with web applications via RabbitMQ and automatically filters user content.
    • Integrated third-party services Google ReCaptcha, Analytics, AdSense and Taboola Ads, Pingdom, and SendGrid with a web application—resulting in increased revenue, performance, and accessibility.
    • Increased a web application's load speeds by 40% that is running Classic ASP, ASP.NET WebForms, DevExpress, jQuery, and MS SQL.
    • Developed tools for admins to create web pages using DevExpress HTML editor without involving a programmer.
    • Expanded and scaled development capabilities by introducing a new CI/CD process using Azure DevOps and set up new development and testing environments for existing web applications using AWS.
    • Minimized downtime maintaining web applications and background services on AWS EC2 (Windows Servers) and RDS (MS SQL Server) machines.
    Technologies: Azure DevOps, Git, RabbitMQ, jQuery, Classic ASP, Microsoft SQL Server, Entity Framework, DevExpress, ASP.NET Web Forms, C#
  • Senior C# .NET and Xamarin.Forms Developer

    2016 - 2018
    Atos IT Solutions and Services, LLC.
    • Developed web application using ASP.NET Web Forms and DevExpress components automating workflows for global real estate company. App tracked CapEx and OpEx movement and generated PDF and XLS reports.
    • Streamlined operations building modules for Excel reporting using ComponentPro, developing Windows service to perform background long-processing operations, and creating Xamarin.Forms applying UI components.
    • Optimized data sharing designing multi-platform library used by both Xamarin.Forms and ASP.NET MVC projects to synchronise, serialize, encrypt, and validate data sent between Android smartphones and server.
    • Developed auto-synchronizing library using MS SQL Server and local MySQL databases enabling end-users to work offline and synchronise data with a server-side database at later intervals.
    • Improved XLS and PDF reporting performance by reducing their generation time up to 50%.
    • Designed and created a VBA MS Access application that is used by several users simultaneously with reports and authentication.
    Technologies: Microsoft SQL Server, TFS, Git, Model View Viewmodel (MVVM), Prism, Xamarin.Forms, PDFtk, ComponentPro, DevExpress, SQL Server 2012, ADO.NET, Web Forms, ASP.NET, C#
  • Senior WPF and C# Developer

    2017 - 2017
    Donation Kiosk (via Toptal)
    • Produced a WPF application for touchscreens customizing controls such as buttons, labels, and list views.
    • Saved countless hours adding auto-updating functionalities to a desktop WPF application using a PHP back end via JSON.
    Technologies: JSON, XAML, Git, Windows Presentation Foundation (WPF)
  • Senior C# .NET Developer

    2016 - 2017
    • Programmed a desktop WPF application with an Intel RealSense camera and web-based admin panel using ASP.NET MVC and MS SQL Server.
    • Created a WCF service for interaction between a WPF application and a web-based admin panel for remote access.
    Technologies: Microsoft Kinect, Git, Entity Framework, Microsoft SQL Server, Intel RealSense, Windows Communication Framework (WCF), Windows Presentation Foundation (WPF), ASP.NET MVC, .NET, C#
  • Load-testing Engineer

    2016 - 2016
    Home Credit and Finance Bank, LLC.
    • Enhanced performance by creating test plans for load-testing using JMeter and scripts with Python 3 for a log file analysis.
    • Prepared sample data for test plans using the Oracle database.
    Technologies: Git, Oracle, Python 3, Apache JMeter
  • ActionScript 3 and C# .NET Developer

    2012 - 2016
    BI-Leasing, LLC.
    • Streamlined operations, architecting internal application to automate processes with role-based access using PostgreSQL, ASP.NET Web API, AngularJS, and FastReport .NET.
    • Developed an advertisement application using Kinect 2, WPF, and ASP.NET MVC boosting visibility.
    • Built an internet kiosk application with WPF permitting on-line banking for existing customers.
    • Created a cartographic application using the OpenStreetMap API and ActionScript 3.0 for Windows, Android, and iOS platforms.
    • Accelerated knowledge sharing developing a library of ActionScript 3 UI components were used by multiple teams across different projects.
    Technologies: Visual Studio, Subversion (SVN), Git, ActionScript 3, PostgreSQL, Microsoft SQL Server, Entity Framework, Microsoft Kinect, FastReport, AngularJS, LINQ, Web API, Windows Presentation Foundation (WPF), .NET, C#


  • K-Visor

    K-Visor is an interactive Windows application that gives you a more effective and convenient way to deliver your products or services in places with huge attendance numbers.

    K-Visor can be used do attract passers-by. An image from display starts interacting with them, grabbing their attention and enabling to look through the information about goods and services with several simple gestures.

  • Kiosk Application

    I developed a WPF application for touchscreen displays to perform payments to different organizations with VISA, MasterCard, AmEx payment cards. It has multiple features such as adding email subscriptions and managing the account via a web portal.

    The application is delivered to clients with a touchscreen display and all the necessary hardware.

  • Data Sync Library

    I developed a .NET-based library to sync data across the desktop application (using local MySQL installation), server web application (using MS SQL Server installation) and Xamarin.Forms application (using SQLite). All applications listed above were transferring data between each other via a RESTful back end (ASP.NET Web API).

  • Background Service

    I developed a background service which is called to perform background operations. One of these operations was a task to automatically delete spam content added by users. This task is based on regular expression rules that are managed with a web interface.

    This task made it easier for moderators to work.


  • Languages

    C#.NET, C#, SQL, HTML5, ASP.NET Razor, JavaScript, XML, Python 3, CSS, HTML, TypeScript, Visual Basic for Applications (VBA), Visual Basic .NET (VB.NET), Excel VBA, Python, ActionScript 3, XAML
  • Frameworks

    ASP, ASP.NET Web Forms, .NET, Entity 6, Windows Presentation Foundation (WPF), Microsoft Kinect, Razor Pages, MVC Razor, ASP.NET MVC 5, .NET 5, .NET 2, .NET 3, ASP.NET MVC 6, NUnit, ASP.NET Core MVC, Entity 5, ASP.NET Core, ASP.NET, ASP.NET MVC, ASP.NET Core 2, .NET 4, .NET Core, Entity Framework Core, ASP.NET Web API, Newtonsoft JSON, ADO.NET, Windows Communication Framework (WCF), AngularJS, ASP.NET MVC 4, Bootstrap, Razor, ASP.NET Identity, Angular, Classic ASP
  • Libraries/APIs

    SendGrid API, Web API 2, Web API, JSON API, Entity Framework, Selenium WebDriver, Linq2SQL, ASPX, REST APIs, OpenStreetMap API, jQuery, LINQ, Fluent API, SignalR, AutoMapper, OpenID, Node.js
  • Tools

    LINQ to SQL, DotTrace, Visual Studio .NET, Visual Studio 2015, ReSharper, TFS, Visual Studio 2013, Microsoft Visual Studio, Git, Visual Studio 2019, SendGrid, Visual Studio, Bitbucket, C#.NET WinForms, GitHub, WebStorm, Apache JMeter,, JetBrains Rider, DataGrip, Azure DevOps Services, VS Code, PDFtk, Prism, RabbitMQ, Webpack, Gulp, Subversion (SVN), FastReport, Jira
  • Platforms

    Visual Studio 2017, Amazon EC2, Visual Studio Code, Windows, Oracle, ComponentPro, Amazon Web Services (AWS), Azure
  • Storage

    SQL Server 2012, SQL Server 2014, SQL Server 2010, SQL Server 2008 R2, SQL Server 2016, SQL Server 2017, SQL Server 2005, Databases, Microsoft SQL Server, PostgreSQL, JSON, SQLite, MySQL, Web Forms
  • Other

    GitFlow, Xamarin.Forms, DevExpress, Intel RealSense, DevExpress Controls, Ajax, APIs, Back-end, Back-end Development, Web Development, Full-stack, EF6 Code First, DI
  • Paradigms

    Dependency Injection, REST, RESTful Development, Code First, Database First, Waterfall Development, Azure DevOps, Back-end Architecture, Test-driven Development (TDD), Unit Testing, Model View Viewmodel (MVVM)


  • Master of Science (MS) Degree in Information Systems and Technologies
    2011 - 2013
    Voronezh State Technical University - Voronezh, Russia
  • Bachelor of Science (MS) Degree in Information Systems and Technologies
    2007 - 2011
    Voronezh State Technical University - Voronezh, Russia


  • Become an ASP.NET Core Developer
    APRIL 2020 - PRESENT
  • ASP.NET Core New Features
    APRIL 2020 - PRESENT
  • ASP.NET Core: Middleware
    APRIL 2020 - PRESENT
  • ASP.NET Core: Razor Pages
    APRIL 2020 - PRESENT
  • ASP.NET Core: Security
    APRIL 2020 - PRESENT
  • ASP.NET Core: Test-driven Development
    APRIL 2020 - PRESENT
  • Building and Securing RESTful APIs in ASP.NET Core
    APRIL 2020 - PRESENT
  • Deploying ASP.NET Core Applications
    APRIL 2020 - PRESENT
  • Learning Entity Framework Core
    APRIL 2020 - PRESENT
  • Learning ASP.NET Core MVC
    MARCH 2020 - PRESENT
    LinkedIn Learning
  • Microsoft Certified Solutions Associate
    MARCH 2020 - PRESENT

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