org-metaeffekt/metaeffekt-core
Apr 2025 – Mar 2026
4 Months active
Languages Used
Java
Technical Skills
Backend DevelopmentCVSSData ProcessingData SerializationFile ProcessingJava Development
YanWittmann
PROFILE
Yanwittmann
Yan Wittmann contributed to the org-metaeffekt/metaeffekt-core repository by developing and refining backend features focused on vulnerability management, data integrity, and performance. Over four months, Yan implemented CVSS 4.0 scoring, optimized Excel inventory writing for memory efficiency, and enhanced the vulnerability reporting system through data model cleanup and AEAA architecture improvements. Using Java and leveraging skills in API development, data serialization, and code refactoring, Yan addressed serialization bugs, standardized vulnerability assessment retrieval, and introduced APIs for inventory format discovery. The work demonstrated a strong grasp of software architecture and maintainability, resulting in more reliable, scalable, and efficient core data processing.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
13Total
Bugs
2
Commits
13
Features
8
Lines of code
2,878
Activity Months4
Your Network
13 peopleShared Repositories
13
Work History
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 — org-metaeffekt/metaeffekt-core: Delivered two focused updates to strengthen data integrity and vulnerability reporting. Key features delivered: 1) Data Model Cleanup: Removed CONTENT from MIN_ATTRIBUTES in WeaknessMetaData to streamline serialization and improve data clarity. 2) Vulnerability Reporting System Overhaul: AEAA model enhancements with new AEAA classes and methods for better structure and extensibility. Major bugs fixed: serialization-related issues addressed by simplifying the data model and eliminating unused attribute. Overall impact: clearer data contracts, more reliable vulnerability reporting, and a stronger foundation for future scalability. Technologies/skills demonstrated: data modeling, refactoring, serialization reliability, AEAA architecture, and maintainability practices. Commit highlights: f2ec86c5fd452de4e9129f4b57d4a5adbab6e794; 8394e38fc977c2b6efe73d88db5a8d6cf90e0a07.
2 Commits • 1 Features
Mar 1, 2026March 2026 — org-metaeffekt/metaeffekt-core: Delivered two focused updates to strengthen data integrity and vulnerability reporting. Key features delivered: 1) Data Model Cleanup: Removed CONTENT from MIN_ATTRIBUTES in WeaknessMetaData to streamline serialization and improve data clarity. 2) Vulnerability Reporting System Overhaul: AEAA model enhancements with new AEAA classes and methods for better structure and extensibility. Major bugs fixed: serialization-related issues addressed by simplifying the data model and eliminating unused attribute. Overall impact: clearer data contracts, more reliable vulnerability reporting, and a stronger foundation for future scalability. Technologies/skills demonstrated: data modeling, refactoring, serialization reliability, AEAA architecture, and maintainability practices. Commit highlights: f2ec86c5fd452de4e9129f4b57d4a5adbab6e794; 8394e38fc977c2b6efe73d88db5a8d6cf90e0a07.
March 2026
February 2026
3 Commits • 3 Features
Feb 1, 2026February 2026 performance highlights: Delivered memory-optimized Excel inventory writer, enhanced vulnerability assessment handling, and expanded inventory format discovery API. These updates improved runtime efficiency for large datasets, offered greater flexibility in vulnerability tracking, and strengthened interoperability and test coverage across the core repository.
February 2026
3 Commits • 3 Features
Feb 1, 2026February 2026 performance highlights: Delivered memory-optimized Excel inventory writer, enhanced vulnerability assessment handling, and expanded inventory format discovery API. These updates improved runtime efficiency for large datasets, offered greater flexibility in vulnerability tracking, and strengthened interoperability and test coverage across the core repository.
May 2025
5 Commits • 3 Features
May 1, 2025May 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered three core features focused on vulnerability management reliability and maintainability; fixed a CVSS vector serialization bug; refactored time tracking for better performance. These changes improve reliability of vulnerability reporting, reduce maintenance overhead, and enable faster onboarding of future enhancements. Technologies demonstrated include parsing/serialization improvements, defensive coding, and modular refactor patterns.
5 Commits • 3 Features
May 1, 2025May 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered three core features focused on vulnerability management reliability and maintainability; fixed a CVSS vector serialization bug; refactored time tracking for better performance. These changes improve reliability of vulnerability reporting, reduce maintenance overhead, and enable faster onboarding of future enhancements. Technologies demonstrated include parsing/serialization improvements, defensive coding, and modular refactor patterns.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered critical bug fixes and features to improve data integrity and risk analytics. Inventory serialization fixes reduce duplication and ensure correct data for non-split columns; CVSS 4.0 scoring support enables richer risk assessment through Threat, Environmental, and Base scores, backed by code refactors.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 performance summary for org-metaeffekt/metaeffekt-core: Delivered critical bug fixes and features to improve data integrity and risk analytics. Inventory serialization fixes reduce duplication and ensure correct data for non-split columns; CVSS 4.0 scoring support enables richer risk assessment through Threat, Environmental, and Base scores, backed by code refactors.
Activity
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Quality Metrics
Correctness90.8%
Maintainability88.4%
Architecture84.6%
Performance83.0%
AI Usage23.0%
Skills & Technologies
Programming Languages
Java
Technical Skills
API developmentBackend DevelopmentCVSSCode RefactoringData ProcessingData SerializationDebuggingExcel ProcessingFile ProcessingJavaJava DevelopmentLoggingMemory OptimizationObject-Oriented ProgrammingSecurity
Repositories Contributed To
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