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Jan Müller

PROFILE

Jan Müller

Over four months, contributed to scireum/sirius-web and scireum/sirius-biz by delivering 19 features and resolving 7 bugs, focusing on maintainability, flexibility, and cross-system consistency. Work included expanding API input handling, modularizing UI components, and enhancing design system utility classes using JavaScript, SCSS, and Java. Refactored macros and components for code reuse, improved documentation, and introduced runtime configurability for UI elements. Addressed protocol compatibility and file permission inference in FTP workflows, and implemented an in-memory blob checksum feature to optimize data access across SQL and Mongo backends. Emphasized code consistency, security, and robust integration throughout each repository.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

48Total
Bugs
7
Commits
48
Features
19
Lines of code
1,845
Activity Months4

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 performance summary for scireum/sirius-biz focused on optimizing data access and cross-storage consistency through a new in-memory blob checksum capability.

September 2025

3 Commits • 2 Features

Sep 1, 2025

Month: 2025-09 — Delivered key enhancements to scireum/sirius-biz, including FTPS protocol configuration, MLSD permissions inference fix for incomplete listings, and code quality/documentation clarifications. Focused on reliability, security, and maintainability, with business value in improved uptime, safer FTP interactions, and clearer guidance for insecure FTP usage.

January 2025

35 Commits • 12 Features

Jan 1, 2025

January 2025 (2025-01) monthly summary for scireum/sirius-web: Delivered foundational UI design system enhancements, targeted refactors, and configurability improvements that increase maintainability, consistency, and speed of delivery. Key outcomes include modularized features, runtime configurability, centralized templates, and a richer design system that accelerates future work. The work emphasizes business value: reduced technical debt, improved cross-team UX consistency, and stronger security posture through configuration improvements.

November 2024

9 Commits • 4 Features

Nov 1, 2024

November 2024 performance summary for scireum/sirius-web aimed at enhancing API flexibility, reliability, and maintainability. Key work centered on expanding input handling for web APIs, reinforcing cross-browser compatibility, and clarifying developer-facing documentation and typing. The efforts collectively improve integration robustness and future development velocity, translating into measurable business value for API consumers and downstream services.

Activity

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Quality Metrics

Correctness96.2%
Maintainability96.6%
Architecture93.8%
Performance93.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

CSSHTMLJavaJavaScriptKotlinPropertiesSCSSconf

Technical Skills

Backend DevelopmentCSSCSS ParsingCode ConsistencyCode FormattingCode RefactoringComponent DevelopmentConfiguration ManagementDeprecation ManagementDesign System IntegrationDesign SystemsDocumentationEnum RefactoringFTP ProtocolFile Permissions

Repositories Contributed To

2 repos

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

scireum/sirius-web

Nov 2024 Jan 2025
2 Months active

Languages Used

JavaJavaScriptKotlinCSSHTMLSCSSconf

Technical Skills

Backend DevelopmentCode ConsistencyCode RefactoringDocumentationFront-end DevelopmentJSDoc

scireum/sirius-biz

Sep 2025 Jan 2026
2 Months active

Languages Used

JavaProperties

Technical Skills

Backend DevelopmentCode FormattingCode RefactoringConfiguration ManagementFTP ProtocolFile Permissions