EXCEEDS logo
Exceeds
Sebastiaan Janssen

PROFILE

Sebastiaan Janssen

Contributed to the umbraco/Umbraco-CMS repository by delivering features and fixes that improved build stability, cross-platform compatibility, and CI/CD reliability. Addressed long-path errors by refining build configuration and optimized CI workflows using GitHub Actions and automation. Enhanced backend and frontend integration through workspace setup for authentication modules and streamlined community resource navigation by updating redirects and documentation. Applied .NET and C# expertise to resolve platform-specific issues, such as Linux build failures and synchronous I/O configuration, while maintaining code hygiene and license compliance. Focused on maintainability, localization, and security, ensuring robust, traceable solutions across backend development and DevOps processes.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

15Total
Bugs
5
Commits
15
Features
5
Lines of code
1,456
Activity Months6

Work History

January 2026

1 Commits

Jan 1, 2026

January 2026 monthly summary for development work focused on CI reliability and security in the umbraco/Umbraco-CMS project. Implemented repository-scoped gating so the scheduled GitHub Actions workflow runs only in the main repository, preventing execution on forks and reducing fork-related CI noise.

October 2025

4 Commits • 2 Features

Oct 1, 2025

Month: 2025-10 | Summary: Delivered two high-impact features for the umbraco/Umbraco-CMS repository, accelerating release communications and improving community navigation. Implemented GitHub Release Discussion Automation to auto-create and associate release discussions from release/* labels, and completed Community Website Redirects and Cleanup to centralize resources by pointing old references to forum.umbraco.com and cleaning up documentation/navigation. No major bugs fixed this month.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 — Umbraco-CMS: Focused on enabling login feature development by setting up the Login Module Workspace and aligning it with the existing UI client. This groundwork accelerates upcoming authentication work and reduces integration risk by providing parallel development paths and a clear trace of work.

January 2025

3 Commits • 1 Features

Jan 1, 2025

January 2025 focused on cross-platform robustness and governance, delivering key platform hygiene improvements and policy changes that reduce platform-specific risk and strengthen security posture.

November 2024

5 Commits • 1 Features

Nov 1, 2024

Month 2024-11: Delivered targeted maintenance and stability improvements for umbraco/Umbraco-CMS, focusing on license compliance, testing infrastructure cleanup, and restoring reliable content behavior across locales. The work reduced maintenance burden, stabilized critical workflows, and preserves expected localization behavior.

October 2024

1 Commits

Oct 1, 2024

October 2024 monthly summary for umbraco/Umbraco-CMS: Delivered a targeted build stabilization fix that prevents copying of the node_modules directory during the build, addressing long-path errors and reducing unnecessary file operations across environments. The change enhances CI reliability and build performance, enabling faster feedback and more stable releases.

Activity

Loading activity data...

Quality Metrics

Correctness91.4%
Maintainability93.4%
Architecture88.0%
Performance90.6%
AI Usage22.6%

Skills & Technologies

Programming Languages

C#JSONJavaScriptMarkdownTypeScriptXMLYAMLcshtml

Technical Skills

.NET .NET Core IIS Configuration KestrelAPI DevelopmentAPI IntegrationAutomationBackend DevelopmentCI/CDCode RefactoringDependency InjectionDevOpsDocumentationFront-end DevelopmentFrontend Development

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

umbraco/Umbraco-CMS

Oct 2024 Jan 2026
6 Months active

Languages Used

XMLC#JavaScriptMarkdownJSONTypeScriptYAMLcshtml

Technical Skills

build configurationerror handlingsoftware maintenance .NETAPI DevelopmentBackend Development

umbraco/UmbracoDocs

Jan 2025 Jan 2025
1 Month active

Languages Used

Markdown

Technical Skills

Documentation