I am a Senior .NET Developer with over 20 years of experience in building scalable and high-performing enterprise applications. My expertise lies in C#, .NET Core, and developing RESTful APIs. I excel in optimizing performance and ensuring stability in distributed environments, collaborating effectively with cross-functional teams.

Viktor Ralchenko

I am a Senior .NET Developer with over 20 years of experience in building scalable and high-performing enterprise applications. My expertise lies in C#, .NET Core, and developing RESTful APIs. I excel in optimizing performance and ensuring stability in distributed environments, collaborating effectively with cross-functional teams.

Available to hire

I am a Senior .NET Developer with over 20 years of experience in building scalable and high-performing enterprise applications. My expertise lies in C#, .NET Core, and developing RESTful APIs. I excel in optimizing performance and ensuring stability in distributed environments, collaborating effectively with cross-functional teams.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Advanced
German
Intermediate
Russian
Fluent
Ukrainian
Fluent

Work Experience

Senior Software Engineer at Bystronic
January 31, 2025 - July 28, 2025
Developed connectors and adapters for laser cutting and bending machines, supporting the Data Platform application. Designed and implemented ASP.NET Web APIs rigorously tested using Postman. Leveraged Azure DevOps to establish CI/CD pipelines to streamline deployment and release processes. Participated in agile refinements, breaking down stories into subtasks and estimation. Debugged, tested, and resolved production issues to maintain application stability, reliability and smooth operations using a tech stack including VS2022, Visual Studio Code, .NET Core (versions 6-8), Python, VueJs, TypeScript, SQL Server, LiteDB, Azure, Postman, Ubuntu and Docker. Applied unit testing with XUnit and Moq for extensive test coverage.
Senior Software Engineer at UUUSoftware.com
July 31, 2023 - July 28, 2025
Developed backend for CMS system using C#, .NET Framework, .NET Core, AWS, Jenkins, PowerShell, Oracle, and Angular. Added functionality to existing .NET applications to enhance capabilities and improve user experience. Supported microservice projects, optimized ASP.NET application performance, increased code coverage and performed comprehensive debugging and testing. Used unit testing frameworks including XUnit, Moq, and FluentAssertions.
.NET Programmer at Axxos
March 31, 2021 - July 28, 2025
Implemented complex filters in an ASP.NET Core web application. Created Windows services that transfer data from XML files to databases, including validation and business logic. Supported legacy ASP.NET WinForm app in VB by adding features and fixing bugs. Tuned SQL Server performance and optimized stored procedures. Performed small frontend tasks using Angular with TypeScript. Provided troubleshooting, debugging, unit testing, and production support. Assisted the team leader in task assignments and quality maintenance.
.NET Programmer at Svitla Systems
December 31, 2017 - July 28, 2025
Worked full-time developing .NET applications.
.NET Programmer at Volia Software
July 31, 2013 - July 28, 2025
Worked full-time developing .NET applications.
Junior/Middle .NET Programmer at Infopulse
January 31, 2010 - July 28, 2025
Worked full-time as Junior/Middle .NET Programmer.
1C-Programmer, Sysadmin at ATL-TradeLine
May 31, 2006 - July 28, 2025
Performed programming and system administration duties.
Senior Quality Assurance Automation Engineer at Self-employed
February 1, 2025 - November 8, 2025
Ensured system reliability by performing comprehensive end-to-end black-box testing across a complex microservices architecture, proactively identifying integration issues before production. Designed and implemented a scalable test automation framework using Node.js and Playwright.
Senior Software Engineer at Bystronic Group
February 1, 2025 - February 1, 2025
Enabled seamless integration of industrial hardware by developing robust connectors and adapters for laser cutting and bending machines, directly supporting the company’s Data Platform and improving operational efficiency.
Senior Fullstack Software Engineer at UUUSoftware.com
July 1, 2023 - July 1, 2023
Led backend development for a CMS system using C#, .NET Framework, .NET Core, AWS, Jenkins, Oracle, and Angular. Enhanced existing .NET applications by adding new functionality to improve capabilities.
Software Engineer at Axxos
March 1, 2021 - March 1, 2021
Implemented complex filtering, sorting, and paging functionalities in an ASP.NET Core web application. Created Windows services to process and transfer data from XML files into a database.
Senior C# and SQL Developer at Volia Software
July 1, 2013 - July 1, 2013
Responsible for implementing new features for the web platform. Managed application deployments and release cycles.
Senior Software Engineer at Bystronic Group
October 1, 2023 - February 1, 2025
Designed and developed backend services using C# and .NET 6–8, built integrations with industrial hardware to improve data flow.
Senior Fullstack Software Engineer at UUUSoftware
April 1, 2021 - July 1, 2023
Developed and maintained enterprise applications using C#, .NET Core, improving backend performance and reliability.
Software Engineer at Axxos
January 1, 2018 - March 1, 2021
Built backend components in ASP.NET Core and created Windows services for XML data processing.
Web Software Engineer at Svitla Systems
August 1, 2013 - December 1, 2017
Implemented new features for a large web platform using ASP.NET and React, managing deployments and release cycles.

Education

Master’s degree at National State Polytechnic University (Chernihiv, UA)
September 1, 1996 - February 28, 2002
Secondary school diploma at Secondary school 29 (Chernihiv, UA)
September 1, 1986 - September 30, 1996
Master's Degree at National State Polytechnic University
January 1, 1996 - January 1, 2002
Master’s in Computer Systems & Networks at National State Polytechnic University
January 1, 1996 - January 1, 2002

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Manufacturing, Computers & Electronics, Professional Services