Yonko Stoyanov, Developer in Plovdiv, Bulgaria
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Yonko Stoyanov

Verified Expert  in Engineering

Software Developer

Plovdiv, Bulgaria
Toptal Member Since
March 19, 2020

In 2009, Yonko began his career in software development. During that time, he's successfully worked in teams of all sizes and various cultures, communicated efficiently to deliver project solutions, and accumulated extensive in-depth experience in major technologies. Currently, Yonko enjoys working as a full-stack developer in JavaScript/.NET Core projects, where his expertise and deep understanding of architecture and theory are most impactful.


Fortune 100 North American Construction Equipment Manufacturer
Angular, C#.NET, RxJS, Azure, Microsoft SQL Server, Entity Framework Core
Televic Group
Angular, Microsoft SQL Server, Razor, ASP.NET, C#, .NET
Televic Group
WCF RIA Services, Windows Communication Framework (WCF)...




Preferred Environment

Azure DevOps, TFS, Azure, Windows Server, Angular, JavaScript, Microsoft SQL Server, ASP.NET, C#, .NET

The most amazing...

...software I've developed is an app for private jet owners and pilots. It enables booking overflight permits and ground services directly from a mobile device.

Work Experience

Full-stack Developer

2020 - PRESENT
Fortune 100 North American Construction Equipment Manufacturer
  • Engineered a global sales tool using NgRx and Angular 8 quickly and efficiently.
  • Developed a back-end API for uploading and manipulating customer data to deliver value for the customer.
  • Built Azure continuous integration and continuous delivery pipelines.
  • Created a full suite of automation tests for continuous integration.
Technologies: Angular, C#.NET, RxJS, Azure, Microsoft SQL Server, Entity Framework Core


2017 - 2020
Televic Group
  • Worked on a content management application as part of a suite of passenger information systems on trains.
  • Handled the import/export and synchronization of general transit feed specification data—such as public transportation schedules—on wayside systems.
  • Contributed to software delivery and deployment processes to end customers.
Technologies: Angular, Microsoft SQL Server, Razor, ASP.NET, C#, .NET


2011 - 2017
Televic Group
  • Worked on a CMS application as part of a comprehensive hospital solution for communication, including calls for nurses, access control, and intercom communication.
  • Developed interfaces for various 3rd-party providers—enabling cross-platform or company data exchange using WCF or REST web services.
  • Built a Windows service for system monitoring, auto-deployment, and updating of the hospital's servers.
  • Contributed actively to fixing critical issues on live, high-demand production systems.
Technologies: WCF RIA Services, Windows Communication Framework (WCF), Windows Presentation Foundation (WPF), ASP.NET, MS Silverlight, C#, .NET


2009 - 2011
  • Gathered and analyzed business requirements from customers.
  • Developed an enterprise Silverlight application with a .NET back end for handling comprehensive service-level agreements.
  • Built and supported native applications for Windows Mobile and Windows Phone-powered devices.
  • Contributed to the build-system design and implementation.
Technologies: MS Silverlight, ASP.NET, .NET


LiveCoM allows train operating companies to manage the content and design of their onboard passenger information system. It also supports the visualization of real-time transport data generated by 3rd parties. It's built on .NET technologies combined with the latest JavaScript frameworks.


C#, JavaScript, TypeScript, CSS, SQL, CSS3, SCSS, C#.NET


.NET, .NET Core, ASP.NET, ASP.NET Web API, Angular, ASP.NET Web Forms, Bootstrap, Windows Presentation Foundation (WPF), Windows Communication Framework (WCF), Razor, ASP.NET MVC 3, Entity, ASP.NET MVC, Entity Framework Core


Entity Framework, RxJS


TFS, MS Silverlight, Jira, Confluence, Git, Jenkins, WCF RIA Services, Azure App Service


Azure DevOps, Agile Software Development


Azure, Windows Server


Microsoft SQL Server, Azure Blobs

2006 - 2009

Completed Credits Toward an Engineer's Degree in Software Engineering

New Bulgarian University - Sofia, Bulgaria

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