EPPlusSoftware/EPPlus
Dec 2024 – Jun 2025
4 Months active
Languages Used
C#YAMLXML
Technical Skills
Backend DevelopmentBug FixingCSSCSS StylingCachingExcel Export
Ossian Edström
PROFILE
Ossian Edström
Contributed to the EPPlus repository by delivering features and fixes that enhanced Excel automation, export fidelity, and CI/CD reliability. Developed robust VLOOKUP and HLOOKUP logic in C#, expanding unit tests to improve lookup accuracy and maintainability. Implemented end-to-end HTML export for Excel checkboxes, optimizing CSS styling and caching for performance. Improved OLE object anchoring and DXF style preservation during worksheet duplication, addressing document fidelity issues. Strengthened GitHub Actions workflows by refining API integration and authentication using YAML, and improved NuGet packaging by ensuring license inclusion. Focused on backend development, software testing, and packaging to support reliable, compliant releases.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
22Total
Bugs
3
Commits
22
Features
4
Lines of code
1,104
Activity Months4
Your Network
9 peopleSame Organization
@epplussoftware.com3
Work History
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.
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
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.
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.
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.
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
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.
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.
Activity
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Quality Metrics
Correctness91.0%
Maintainability89.6%
Architecture83.6%
Performance88.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C#XMLYAML
Technical Skills
.NETAPI IntegrationBackend DevelopmentBug FixingCI/CDCSSCSS StylingCachingExcel AutomationExcel ExportExcel Formula ParsingExcel FunctionsExcel to HTML ConversionFormula ParsingGitHub Actions
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline