Tsvetomir Tsonev
Distinguished Software Engineer at Progress
Bulgaria
Summary
🤩
Rockstar🎓
Top SchoolTsvetomir Tsonev is a Distinguished Software Engineer with 15 years of experience specializing in front-end engineering and developer tooling, currently leading platform and UI efforts at Progress. He has been a key contributor and team lead on the widely used Kendo UI library, improving widgets, Angular integrations, export features and mobile behavior while championing backwards compatibility. Comfortable across the full stack, he has hands-on experience with deployment and automation—TFS, AWS S3/CloudFront, GitHub migrations—and a pragmatic ops mindset. Colleagues rely on him for shipping reliable, maintainable UI components and solving tricky memory-leak and performance issues. Based in Bulgaria, he combines deep product knowledge with a habit of shipping early and often—a trait honed building long-lived systems like a production purchasing module still in use today.
15 years of coding experience
19 years of employment as a software developer
Bachelor's degree, Informatics, Bachelor's degree, Informatics at Vélikoturnovski universitet 'Sv. Sv. Kiril i Metodi'
English, Bulgarian
Github Skills (20)
javascript10
jquery10
ui-components10
typescript10
asp-net-mvc10
component-kit10
front-end-development10
kendo-ui10
angularjs10
typescript-types10
dotnet-core10
typescripts10
csharp10
angular10
exporter9
Programming languages (10)
Github contributions (5)
telerik/kendo-angular
Apr 2017 - Oct 2022
Issue tracker - Kendo UI for Angular
Role in this project:
Front-end Developer
Front-end DeveloperContributions:25 reviews, 130 commits, 76 PRs in 5 years 7 months
Contributions summary:Tsvetomir's commits primarily focused on adding new sample applications and features to the Kendo UI for Angular library. The user implemented a PDF export sample with embedded fonts, showcasing the use of Kendo UI components, Angular, and TypeScript. Further contributions include integrating a Chart WebSocket API example, demonstrating data visualization with websockets and chart components. The user also migrated and updated several example projects.
kendotrackertelerikreact18angular
telerik/kendo-ui-core
Mar 2011 - May 2017
An HTML5, jQuery-based widget library for building modern web apps.
Role in this project:Front-end Developer
Front-end DeveloperContributions:1 release, 1 review, 6895 commits in 6 years 2 months
Contributions summary:Tsvetomir primarily focused on enhancing the Kendo UI library's core and mobile components, specifically for the web. Their contributions included adding new features like mousewheel scrolling and key code support, and fixing defects across various widgets. They also worked on improving the Angular directives for the library and addressing memory leaks. Furthermore, they made updates to the spreadsheet's export features.
widgetjquerytelerikjavascriptweb-apps
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