kivitendo/kivitendo-erp
Apr 2024 – Jan 2026
11 Months active
Languages Used
PerlJavaScriptHTML
Technical Skills
Perlback end developmentJavaScriptBackend DevelopmentCode RefactoringDatabase Query Optimization
Werner Hahn
PROFILE
Werner Hahn
Over 11 months, WH contributed to the kivitendo/kivitendo-erp repository by building and refining features that improved order processing, document workflows, and data integrity. WH implemented enhancements such as partsgroup-based order grouping, dynamic UI localization, and robust search capabilities, using Perl, JavaScript, and HTML. Their technical approach emphasized maintainable backend development, targeted bug fixes, and code refactoring to streamline ERP workflows and ensure accurate financial data. By addressing template data duplication and optimizing database queries, WH reduced inconsistencies and improved reporting reliability. The work demonstrated depth in full stack development, with careful attention to business logic, usability, and maintainability.
Overall Statistics
Feature vs Bugs
73%Features
Repository Contributions
32Total
Bugs
6
Commits
32
Features
16
Lines of code
293
Activity Months11
Your Network
20 peopleShared Repositories
20
Work History
January 2026
1 Commits
Jan 1, 2026January 2026 monthly summary for kivitendo/kivitendo-erp: Delivered a focused data integrity enhancement to remove duplicate partsgroup entries from invoice and order detail arrays, addressing a data redundancy issue that could lead to inconsistencies in invoicing and order processing. The fix, implemented in commit 901b05d9769458df08bcc46f1a6bb308a3092977 with message 'doppeltes partsgroup in @array raus für TEMPLATE_ARRAYS', improves reliability of financial docs and downstream analytics. This work aligns with ongoing efforts to strengthen data quality, consistency across modules, and maintainability.
1 Commits
Jan 1, 2026January 2026 monthly summary for kivitendo/kivitendo-erp: Delivered a focused data integrity enhancement to remove duplicate partsgroup entries from invoice and order detail arrays, addressing a data redundancy issue that could lead to inconsistencies in invoicing and order processing. The fix, implemented in commit 901b05d9769458df08bcc46f1a6bb308a3092977 with message 'doppeltes partsgroup in @array raus für TEMPLATE_ARRAYS', improves reliability of financial docs and downstream analytics. This work aligns with ongoing efforts to strengthen data quality, consistency across modules, and maintainability.
January 2026
December 2025
1 Commits
Dec 1, 2025Month: 2025-12 — Stabilized template rendering and data integrity in kivitendo/kivitendo-erp by removing a duplication in template data (partsgroup) within TEMPLATE_VARS used by invoices and orders. This change reduces redundant template arrays, minimizes edge cases in invoice/order generation, and lowers the risk of data inconsistencies.
December 2025
1 Commits
Dec 1, 2025Month: 2025-12 — Stabilized template rendering and data integrity in kivitendo/kivitendo-erp by removing a duplication in template data (partsgroup) within TEMPLATE_VARS used by invoices and orders. This change reduces redundant template arrays, minimizes edge cases in invoice/order generation, and lowers the risk of data inconsistencies.
August 2025
10 Commits • 4 Features
Aug 1, 2025Monthly summary for 2025-08 focusing on quality improvements, data consistency, and feature enhancements in kivitendo-erp. Delivered internal refactors to improve data access across delivery order handling, UI scripts, and the Form module; propagated the partsgroup field into OE and IS template arrays with UI filtering to improve reporting; enhanced the AR search index by adding shippingpoint and cusordnumber fields for more robust searching; added localization strings for emails and vendor information to strengthen multilingual support. Included minor bug fixes for translations and data mappings, along with code cleanup such as removing dead code and debugging remnants. Overall, these changes reduce maintenance risk, improve reporting accuracy, and enable faster business decisions through better searchability and localization support.
10 Commits • 4 Features
Aug 1, 2025Monthly summary for 2025-08 focusing on quality improvements, data consistency, and feature enhancements in kivitendo-erp. Delivered internal refactors to improve data access across delivery order handling, UI scripts, and the Form module; propagated the partsgroup field into OE and IS template arrays with UI filtering to improve reporting; enhanced the AR search index by adding shippingpoint and cusordnumber fields for more robust searching; added localization strings for emails and vendor information to strengthen multilingual support. Included minor bug fixes for translations and data mappings, along with code cleanup such as removing dead code and debugging remnants. Overall, these changes reduce maintenance risk, improve reporting accuracy, and enable faster business decisions through better searchability and localization support.
August 2025
July 2025
6 Commits • 4 Features
Jul 1, 2025July 2025 performance summary for kivitendo/kivitendo-erp: focused on delivering feature-driven improvements to form processing, UI usability, localization, and data accuracy. No major defects reported; translation polish and UI refinements reduced friction and support overhead.
July 2025
6 Commits • 4 Features
Jul 1, 2025July 2025 performance summary for kivitendo/kivitendo-erp: focused on delivering feature-driven improvements to form processing, UI usability, localization, and data accuracy. No major defects reported; translation polish and UI refinements reduced friction and support overhead.
June 2025
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly recap for kivitendo/kivitendo-erp. Delivered two major features: (1) Order Details — Added partsgroup field to enable grouping of parts within orders, improving accuracy of grouping and reporting. (2) Navigation provider switch to GraphHopper, replacing Google Maps endpoints and query parameters to reflect the new service. These changes reduce dependency on Google Maps and position the system for easier future provider migrations. Impact: streamlined order item grouping and more reliable navigation data across modules; enhanced maintainability and readiness for future enhancements.
2 Commits • 2 Features
Jun 1, 2025June 2025 monthly recap for kivitendo/kivitendo-erp. Delivered two major features: (1) Order Details — Added partsgroup field to enable grouping of parts within orders, improving accuracy of grouping and reporting. (2) Navigation provider switch to GraphHopper, replacing Google Maps endpoints and query parameters to reflect the new service. These changes reduce dependency on Google Maps and position the system for easier future provider migrations. Impact: streamlined order item grouping and more reliable navigation data across modules; enhanced maintainability and readiness for future enhancements.
June 2025
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for the kivitendo/kivitendo-erp development work focusing on delivery order workflows and stock movement accuracy. Highlights include feature delivery for vendor-classification and dynamic UI titles, plus a bug fix ensuring sub-unit accuracy in stock movements tied to delivery orders. The work emphasizes business value through improved procurement clarity, inventory accuracy, and better user guidance in vendor-related delivery scenarios.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for the kivitendo/kivitendo-erp development work focusing on delivery order workflows and stock movement accuracy. Highlights include feature delivery for vendor-classification and dynamic UI titles, plus a bug fix ensuring sub-unit accuracy in stock movements tied to delivery orders. The work emphasizes business value through improved procurement clarity, inventory accuracy, and better user guidance in vendor-related delivery scenarios.
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 (2025-03) focused on strengthening document lifecycle, data integrity, and session stability in the kivitendo-erp project. Delivered enhancements include new reclamation and intake transaction types to streamline workflow, targeted fixes to email attachment handling to improve user control and reduce errors, and stabilization of basket retrieval and login processes to minimize session-related issues. Overall, these improvements reduce manual work, improve document tracing, and enhance reliability in core business workflows.
3 Commits • 1 Features
Mar 1, 2025March 2025 (2025-03) focused on strengthening document lifecycle, data integrity, and session stability in the kivitendo-erp project. Delivered enhancements include new reclamation and intake transaction types to streamline workflow, targeted fixes to email attachment handling to improve user control and reduce errors, and stabilization of basket retrieval and login processes to minimize session-related issues. Overall, these improvements reduce manual work, improve document tracing, and enhance reliability in core business workflows.
March 2025
December 2024
1 Commits
Dec 1, 2024December 2024: Focused on improving data integrity in the debtor booking workflow of kivitendo/kivitendo-erp. Delivered a targeted bug fix that ensures the debtor booking input is populated using the ID attribute for frontend JavaScript interactions, coupled with refinements to numeric input and total formatting for consistency. These changes improve data entry accuracy and display, enhancing AR data quality and user experience. This aligns with business goals of reliable financial records and streamlined accounts receivable processes.
December 2024
1 Commits
Dec 1, 2024December 2024: Focused on improving data integrity in the debtor booking workflow of kivitendo/kivitendo-erp. Delivered a targeted bug fix that ensures the debtor booking input is populated using the ID attribute for frontend JavaScript interactions, coupled with refinements to numeric input and total formatting for consistency. These changes improve data entry accuracy and display, enhancing AR data quality and user experience. This aligns with business goals of reliable financial records and streamlined accounts receivable processes.
November 2024
3 Commits • 1 Features
Nov 1, 2024Monthly summary for 2024-11 focused on delivering enhanced invoice search capabilities in kivitendo/kivitendo-erp, with cross-entity search coverage, relevant commit activity, and measurable business impact. Highlights include improved data discoverability for invoices, reduced time-to-find information across AP/AR, and polished user interface output.
3 Commits • 1 Features
Nov 1, 2024Monthly summary for 2024-11 focused on delivering enhanced invoice search capabilities in kivitendo/kivitendo-erp, with cross-entity search coverage, relevant commit activity, and measurable business impact. Highlights include improved data discoverability for invoices, reduced time-to-find information across AP/AR, and polished user interface output.
November 2024
July 2024
1 Commits • 1 Features
Jul 1, 2024July 2024: Implemented Delivery Order Closure and Management Enhancement in kivitendo-erp, enabling delivery orders to be marked as closed and improving lifecycle control and auditability. No major bugs reported this month. Impact includes faster order closure, clearer status, and better data integrity in reports. Demonstrated competencies in feature-driven development, clear Git commit discipline (including German-labeled method), and integration with existing ERP workflows.
July 2024
1 Commits • 1 Features
Jul 1, 2024July 2024: Implemented Delivery Order Closure and Management Enhancement in kivitendo-erp, enabling delivery orders to be marked as closed and improving lifecycle control and auditability. No major bugs reported this month. Impact includes faster order closure, clearer status, and better data integrity in reports. Demonstrated competencies in feature-driven development, clear Git commit discipline (including German-labeled method), and integration with existing ERP workflows.
April 2024
2 Commits • 2 Features
Apr 1, 2024Monthly summary for 2024-04 focusing on feature delivery and code quality improvements in kivitendo/kivitendo-erp. No major bugs fixed this month; emphasis on feature delivery, maintainability, and business value.
2 Commits • 2 Features
Apr 1, 2024Monthly summary for 2024-04 focusing on feature delivery and code quality improvements in kivitendo/kivitendo-erp. No major bugs fixed this month; emphasis on feature delivery, maintainability, and business value.
April 2024
Activity
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Quality Metrics
Correctness86.2%
Maintainability88.2%
Architecture82.4%
Performance81.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
HTMLJavaScriptPerl
Technical Skills
API IntegrationBackend DevelopmentBug FixingCode RefactoringDatabase InteractionDatabase Query OptimizationDatabase SearchERP DevelopmentFront-end DevelopmentFrontend DevelopmentFull Stack DevelopmentHTMLHTML TemplatingInternationalizationJavaScript
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