EPPlusSoftware/EPPlus
Dec 2024 – Jun 2026
5 Months active
Languages Used
C#YAMLXML
Technical Skills
Backend DevelopmentBug FixingCSSCSS StylingCachingExcel Export
Ossian Edström
PROFILE
Ossian Edström
Contributed to the EPPlusSoftware/EPPlus repository by developing and refining backend features for Excel automation, HTML export, and CI/CD reliability. Delivered robust enhancements such as improved VLOOKUP/HLOOKUP logic, end-to-end HTML export for Excel checkboxes, and preservation of DXF styles during worksheet duplication. Addressed bugs in GitHub Actions workflows and HTML image export, focusing on maintainability and test coverage. Leveraged C#, .NET, and YAML to implement solutions that increased reliability, compliance, and performance. Emphasized regression safety through expanded unit testing and workflow automation, ensuring stable releases and streamlined onboarding for future changes across packaging, export, and integration paths.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
23Total
Bugs
4
Commits
23
Features
4
Lines of code
1,130
Activity Months5
Your Network
9 peopleSame Organization
@epplussoftware.com3
Work History
June 2026
1 Commits
Jun 1, 2026June 2026 monthly summary for EPPlusSoftware/EPPlus: Focused on stability and correctness in the HTML export path, with a targeted fix to image inclusion flag evaluation and enhancements to tests. Delivered a fix that corrects the evaluation of image inclusion settings in the HTML exporter by replacing a bitwise AND with proper handling of individual enum flags, improving export fidelity and reducing risk of missing images or including unintended ones. Updated test configurations and added a placeholder test method to improve future coverage and CI reliability. All changes are tracked in the commit listed below and linked to the HTML exporter feature.
1 Commits
Jun 1, 2026June 2026 monthly summary for EPPlusSoftware/EPPlus: Focused on stability and correctness in the HTML export path, with a targeted fix to image inclusion flag evaluation and enhancements to tests. Delivered a fix that corrects the evaluation of image inclusion settings in the HTML exporter by replacing a bitwise AND with proper handling of individual enum flags, improving export fidelity and reducing risk of missing images or including unintended ones. Updated test configurations and added a placeholder test method to improve future coverage and CI reliability. All changes are tracked in the commit listed below and linked to the HTML exporter feature.
June 2026
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for EPPlus repository, focusing on licensing inclusion in the NuGet package to improve license distribution, compliance, and packaging reliability.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for EPPlus repository, focusing on licensing inclusion in the NuGet package to improve license distribution, compliance, and packaging reliability.
April 2025
4 Commits
Apr 1, 2025April 2025 monthly summary for EPPlus repository focused on CI/CD reliability improvements and authentication cleanup in GitHub Actions.
4 Commits
Apr 1, 2025April 2025 monthly summary for EPPlus repository focused on CI/CD reliability improvements and authentication cleanup in GitHub Actions.
April 2025
January 2025
5 Commits • 2 Features
Jan 1, 2025January 2025 EPPlus delivery focused on reliability and fidelity of document features, delivering two high-impact capabilities with regression tests. Business value: improved OLE handling reduces user-visible issues in complex documents, and preserved DXF styles/conditional formatting during copy improves accuracy and user productivity for duplications of worksheets/workbooks.
January 2025
5 Commits • 2 Features
Jan 1, 2025January 2025 EPPlus delivery focused on reliability and fidelity of document features, delivering two high-impact capabilities with regression tests. Business value: improved OLE handling reduces user-visible issues in complex documents, and preserved DXF styles/conditional formatting during copy improves accuracy and user productivity for duplications of worksheets/workbooks.
December 2024
12 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12: Delivered two major EPPlus capabilities with strong business impact: (1) VLOOKUP/HLOOKUP robustness fixes with expanded unit tests; (2) end-to-end HTML export support for Excel checkboxes with boolean-aware rendering, style caching, and tests. These changes improve reliability of core lookup operations, extend HTML export features, and reduce support workload by increasing test coverage and maintainability.
12 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12: Delivered two major EPPlus capabilities with strong business impact: (1) VLOOKUP/HLOOKUP robustness fixes with expanded unit tests; (2) end-to-end HTML export support for Excel checkboxes with boolean-aware rendering, style caching, and tests. These changes improve reliability of core lookup operations, extend HTML export features, and reduce support workload by increasing test coverage and maintainability.
December 2024
Activity
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Quality Metrics
Correctness90.6%
Maintainability89.2%
Architecture83.4%
Performance88.2%
AI Usage21.8%
Skills & Technologies
Programming Languages
C#XMLYAML
Technical Skills
.NETAPI IntegrationBackend DevelopmentBug FixingC#CI/CDCSSCSS StylingCachingExcel AutomationExcel ExportExcel Formula ParsingExcel FunctionsExcel to HTML ConversionFormula Parsing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline