minvws/nl-kat-coordination
Oct 2024 – Sep 2025
11 Months active
Languages Used
BashDjangoJavaScriptPythonRESTHTMLINIShell
Technical Skills
API DevelopmentAPI SecurityBackend DevelopmentDRFDevOpsDjango
Jeroen Dekkers
PROFILE
Jeroen Dekkers
Jeroen Dekkers developed and maintained the nl-kat-coordination repository, delivering robust backend features and infrastructure improvements over 11 months. He built secure, scalable APIs for report management, enhanced task deduplication across organizations, and strengthened permission models to improve data access control. Using Python, Django, and Docker, Jeroen streamlined CI/CD pipelines, optimized build and deployment processes, and improved system reliability through targeted bug fixes and configuration management. His work included database migrations, localization updates, and security protocol enhancements, resulting in reduced deployment risk, improved runtime stability, and a more maintainable codebase. The engineering demonstrated depth in both feature delivery and operational excellence.
Overall Statistics
Feature vs Bugs
58%Features
Repository Contributions
82Total
Bugs
23
Commits
82
Features
32
Lines of code
240,553
Activity Months11
Your Network
12 people
Work History
September 2025
5 Commits • 3 Features
Sep 1, 2025September 2025 - The nl-kat-coordination work focused on reliability, build hygiene, and error handling, delivering targeted improvements in validation logic, and robustness across build and connectors. Key outcomes include cleaner Docker build output, enhanced DNSSEC and RPKI validation, corrected DKIM handling, and more transparent HTTP error propagation, delivering tangible business value through reduced false positives, increased compliance accuracy, and improved developer productivity.
5 Commits • 3 Features
Sep 1, 2025September 2025 - The nl-kat-coordination work focused on reliability, build hygiene, and error handling, delivering targeted improvements in validation logic, and robustness across build and connectors. Key outcomes include cleaner Docker build output, enhanced DNSSEC and RPKI validation, corrected DKIM handling, and more transparent HTTP error propagation, delivering tangible business value through reduced false positives, increased compliance accuracy, and improved developer productivity.
September 2025
August 2025
9 Commits • 1 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for minvws/nl-kat-coordination. Focus was on security and reliability hardening, onboarding UX improvements, and configuration/logging cleanup to improve stability, observability, and maintainability. Delivered concrete business value by reducing runtime risks, clarifying onboarding, and strengthening operational tooling.
August 2025
9 Commits • 1 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for minvws/nl-kat-coordination. Focus was on security and reliability hardening, onboarding UX improvements, and configuration/logging cleanup to improve stability, observability, and maintainability. Delivered concrete business value by reducing runtime risks, clarifying onboarding, and strengthening operational tooling.
July 2025
15 Commits • 7 Features
Jul 1, 2025July 2025 monthly summary for minvws/nl-kat-coordination. Delivered key features to improve reliability, security, and deployment efficiency, fixed critical boefje task handling bugs, and improved configurability and performance across the stack. The work enhances cross-organization task deduplication, secure PostgreSQL connections, packaging and deployment pipelines, and runtime configurability, leading to reduced duplicate work, faster deployments, and more resilient operations.
15 Commits • 7 Features
Jul 1, 2025July 2025 monthly summary for minvws/nl-kat-coordination. Delivered key features to improve reliability, security, and deployment efficiency, fixed critical boefje task handling bugs, and improved configurability and performance across the stack. The work enhances cross-organization task deduplication, secure PostgreSQL connections, packaging and deployment pipelines, and runtime configurability, leading to reduced duplicate work, faster deployments, and more resilient operations.
July 2025
June 2025
7 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for minvws/nl-kat-coordination focusing on reliability, deployment efficiency, and cross-organization dashboard stability. Delivered robust data handling, containerized CI/CD enablement for new plugins, packaging fixes to ensure deployability, and critical dependency updates, complemented by release documentation.
June 2025
7 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for minvws/nl-kat-coordination focusing on reliability, deployment efficiency, and cross-organization dashboard stability. Delivered robust data handling, containerized CI/CD enablement for new plugins, packaging fixes to ensure deployability, and critical dependency updates, complemented by release documentation.
May 2025
12 Commits • 7 Features
May 1, 2025Monthly summary for 2025-05: Highlights from minvws/nl-kat-coordination include key platform upgrades, performance improvements, security enhancements, and UI/localization refinements that collectively improve development velocity, reliability, and user experience. Key features delivered: - Platform and CI environment upgrade: Standardize development/testing with Python 3.13 default in container images and CI to reduce environment drift and onboarding friction. Commits include 7e70abd2209c916e02d753ec6a3a70489d7f457c (Use Python 3.13 as default Python version in container images and CI, #4406). - Runtime performance and stability improvements: Improve task stability and observability with explicit garbage collection after task execution and task duration logging for boefje, normalizer, and report tasks. Commits: b3e4d3addc32df0bad3b9a9a9b140de8fe4ae4b4 (Call gc.collect() after execution of task, #4432) and 43276085a969819454a0869a341a4a92cd4e4c1f (Log duration of boefje, normalizer and report tasks, #4465). - Improved permission model and security checks: Refactor and strengthen permission handling (recalculate bits, general permissions; remove can_access_all_organizations) for better security and consistency. Commits: 095499086d8d0cdb51492055f5ffc44c9e4be031, ecdc2340722a12491c7d32edd9f46046fda00375, 7dc018293328e7d8ba6c665dd15d98889975723c. - Organization list and ordering improvements: Reflect user’s organizations in clone settings and order by name; added tests and a default ordering migration. Commits: 85068b84fe970f67f6799dbe5a2182505a91385a and bef83ce813ba2ddac37d390c00510a8931e61314. - Frisian localization updates: Update Frisian translations in Django PO to improve localization accuracy and user experience (weblate fix). Commit: 533199ccecaa5c304d30f1849830ee8669133871. Major bugs fixed: - Findings report history handling: Correct extraction of first_seen timestamp when history is unavailable to improve findings history accuracy. Commit: c70ebd0d27ce24b6f4870a79a00c9aeb8eeb29aa. Overall impact and accomplishments: - Increased developer efficiency and reduced environment drift with Python 3.13 standardization. - Greater runtime stability and observability for critical tasks (boefje, normalizer, report). - Strengthened security posture through permission model refactor and reduced reliance on user-centric permissions. - Improved user experience and UI accuracy through organized and named organization lists and Frisian localization enhancements. - Packaging and distribution reliability improvements that help ensure necessary components (e.g., crisis room code) are included in Debian packaging where applicable. Technologies/skills demonstrated: - Python 3.13 in container images/CI, Django localization, garbage collection tuning, task duration instrumentation, permission model refactor, UI/UX data handling, and Debian packaging correctness.
12 Commits • 7 Features
May 1, 2025Monthly summary for 2025-05: Highlights from minvws/nl-kat-coordination include key platform upgrades, performance improvements, security enhancements, and UI/localization refinements that collectively improve development velocity, reliability, and user experience. Key features delivered: - Platform and CI environment upgrade: Standardize development/testing with Python 3.13 default in container images and CI to reduce environment drift and onboarding friction. Commits include 7e70abd2209c916e02d753ec6a3a70489d7f457c (Use Python 3.13 as default Python version in container images and CI, #4406). - Runtime performance and stability improvements: Improve task stability and observability with explicit garbage collection after task execution and task duration logging for boefje, normalizer, and report tasks. Commits: b3e4d3addc32df0bad3b9a9a9b140de8fe4ae4b4 (Call gc.collect() after execution of task, #4432) and 43276085a969819454a0869a341a4a92cd4e4c1f (Log duration of boefje, normalizer and report tasks, #4465). - Improved permission model and security checks: Refactor and strengthen permission handling (recalculate bits, general permissions; remove can_access_all_organizations) for better security and consistency. Commits: 095499086d8d0cdb51492055f5ffc44c9e4be031, ecdc2340722a12491c7d32edd9f46046fda00375, 7dc018293328e7d8ba6c665dd15d98889975723c. - Organization list and ordering improvements: Reflect user’s organizations in clone settings and order by name; added tests and a default ordering migration. Commits: 85068b84fe970f67f6799dbe5a2182505a91385a and bef83ce813ba2ddac37d390c00510a8931e61314. - Frisian localization updates: Update Frisian translations in Django PO to improve localization accuracy and user experience (weblate fix). Commit: 533199ccecaa5c304d30f1849830ee8669133871. Major bugs fixed: - Findings report history handling: Correct extraction of first_seen timestamp when history is unavailable to improve findings history accuracy. Commit: c70ebd0d27ce24b6f4870a79a00c9aeb8eeb29aa. Overall impact and accomplishments: - Increased developer efficiency and reduced environment drift with Python 3.13 standardization. - Greater runtime stability and observability for critical tasks (boefje, normalizer, report). - Strengthened security posture through permission model refactor and reduced reliance on user-centric permissions. - Improved user experience and UI accuracy through organized and named organization lists and Frisian localization enhancements. - Packaging and distribution reliability improvements that help ensure necessary components (e.g., crisis room code) are included in Debian packaging where applicable. Technologies/skills demonstrated: - Python 3.13 in container images/CI, Django localization, garbage collection tuning, task duration instrumentation, permission model refactor, UI/UX data handling, and Debian packaging correctness.
May 2025
April 2025
7 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for minvws/nl-kat-coordination: Delivered key reliability and scope improvements across reports and tasks, improved UI clarity, and tightened data access controls. Focused on stabilizing report processing and asset loading, expanding cross-organization visibility with proper permissions, and cleaning up legacy queues to streamline event handling. These changes reduce risk, improve user experience, and enable broader monitoring capabilities for stakeholders.
April 2025
7 Commits • 2 Features
Apr 1, 2025April 2025 monthly summary for minvws/nl-kat-coordination: Delivered key reliability and scope improvements across reports and tasks, improved UI clarity, and tightened data access controls. Focused on stabilizing report processing and asset loading, expanding cross-organization visibility with proper permissions, and cleaning up legacy queues to streamline event handling. These changes reduce risk, improve user experience, and enable broader monitoring capabilities for stakeholders.
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025 — minvws/nl-kat-coordination: - Focused on standardizing CI/build processes and cleaning up the development environment to improve compatibility, stability, and developer experience. - Implemented Python 3.12/3.13 support and dependency upgrades across the repository, and standardized Makefile usage to invoke python3 for migrations export and message extraction, aligning with modern Python tooling. - Cleaned up dev tooling by removing an unused dependency and updating lock files to streamline setup. - These changes reduce environment-related failures, accelerate continuous integration validation, and enable smoother onboarding for contributors across the project. Notable commits: - CI and Python version upgrades: b7e3f3814062cd17b89da44b016f9e87e7ac2d06 (Ci python 3.12 3.13 (#3951)) - Makefile change to use python3: e8287728b3cda61d21964c5fa34e90fcffd25670 (Call python3 instead of python in Makefile (#4148)) - Dev env cleanup: 7f80b0847e6deb9d34f8aa90c5bfadf033ebb0d0 (Remove robotframework-tidy from rocky dev dependencies (#4155))
3 Commits • 2 Features
Mar 1, 2025March 2025 — minvws/nl-kat-coordination: - Focused on standardizing CI/build processes and cleaning up the development environment to improve compatibility, stability, and developer experience. - Implemented Python 3.12/3.13 support and dependency upgrades across the repository, and standardized Makefile usage to invoke python3 for migrations export and message extraction, aligning with modern Python tooling. - Cleaned up dev tooling by removing an unused dependency and updating lock files to streamline setup. - These changes reduce environment-related failures, accelerate continuous integration validation, and enable smoother onboarding for contributors across the project. Notable commits: - CI and Python version upgrades: b7e3f3814062cd17b89da44b016f9e87e7ac2d06 (Ci python 3.12 3.13 (#3951)) - Makefile change to use python3: e8287728b3cda61d21964c5fa34e90fcffd25670 (Call python3 instead of python in Makefile (#4148)) - Dev env cleanup: 7f80b0847e6deb9d34f8aa90c5bfadf033ebb0d0 (Remove robotframework-tidy from rocky dev dependencies (#4155))
March 2025
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 focused on simplifying the project surface and tightening configuration while preserving functionality. Key deliverables include removal of the Keiko PDF report module and related artifacts, a targeted cleanup of Boefjes settings, and a configuration-driven resolution of an SSL issue at Boefje scan level. These changes reduce maintenance burden, shrink dependencies, and improve release hygiene/CI, with no disruption to end-user features.
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 focused on simplifying the project surface and tightening configuration while preserving functionality. Key deliverables include removal of the Keiko PDF report module and related artifacts, a targeted cleanup of Boefjes settings, and a configuration-driven resolution of an SSL issue at Boefje scan level. These changes reduce maintenance burden, shrink dependencies, and improve release hygiene/CI, with no disruption to end-user features.
December 2024
6 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for minvws/nl-kat-coordination: Delivered a critical catalog access fix in the aggregate report view; introduced upsert capability and field enhancements to the Report Recipes API; and advanced code quality tooling and repository hygiene. These changes reduce data retrieval errors, enable safer API upserts, and improve maintainability and onboarding for the codebase.
6 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for minvws/nl-kat-coordination: Delivered a critical catalog access fix in the aggregate report view; introduced upsert capability and field enhancements to the Report Recipes API; and advanced code quality tooling and repository hygiene. These changes reduce data retrieval errors, enable safer API upserts, and improve maintainability and onboarding for the codebase.
December 2024
November 2024
9 Commits • 3 Features
Nov 1, 2024Month: 2024-11 — nl-kat-coordination (minvws/nl-kat-coordination). Focused on reliability, scalability, and maintainability with concrete, business-value-bearing deliveries across features, fixes, and infrastructure. Key outcomes include centralized configuration for external HTTP calls, scalable worker orchestration, and packaging/environment hygiene improvements that reduce runtime risk and maintenance. Key outcomes by category: - Features delivered: configurable global HTTP timeout; environment-variable-driven Celery workers concurrency; increased PostgreSQL connection capacity; Alembic migration packaging path fix; Boefje environment variable loading and naming consistency. - Major bugs fixed: production static files warning silencing; Boefje environment variable loading/naming fixes; test infrastructure cleanup in rocky katalogus; Debian packaging migration path correction; removal of deprecated Sigrid CI workflows. - Stability and scalability enhancements that directly impact reliability and throughput; improved deployment hygiene and reduced risk during migrations and run-time configuration. - Business value: higher reliability for outgoing service calls, scalable background processing, expanded DB capacity to handle concurrent requests, smoother migrations packaging, and cleaner environment configuration, all contributing to lower MTTR and higher developer velocity. Technologies/skills demonstrated: Django, httpx-based clients, Celery, environment variable management, Alembic migrations, Debian packaging considerations, PostgreSQL tuning, CI/CI workflow maintenance, and Docker/Docker-Compose configuration.
November 2024
9 Commits • 3 Features
Nov 1, 2024Month: 2024-11 — nl-kat-coordination (minvws/nl-kat-coordination). Focused on reliability, scalability, and maintainability with concrete, business-value-bearing deliveries across features, fixes, and infrastructure. Key outcomes include centralized configuration for external HTTP calls, scalable worker orchestration, and packaging/environment hygiene improvements that reduce runtime risk and maintenance. Key outcomes by category: - Features delivered: configurable global HTTP timeout; environment-variable-driven Celery workers concurrency; increased PostgreSQL connection capacity; Alembic migration packaging path fix; Boefje environment variable loading and naming consistency. - Major bugs fixed: production static files warning silencing; Boefje environment variable loading/naming fixes; test infrastructure cleanup in rocky katalogus; Debian packaging migration path correction; removal of deprecated Sigrid CI workflows. - Stability and scalability enhancements that directly impact reliability and throughput; improved deployment hygiene and reduced risk during migrations and run-time configuration. - Business value: higher reliability for outgoing service calls, scalable background processing, expanded DB capacity to handle concurrent requests, smoother migrations packaging, and cleaner environment configuration, all contributing to lower MTTR and higher developer velocity. Technologies/skills demonstrated: Django, httpx-based clients, Celery, environment variable management, Alembic migrations, Debian packaging considerations, PostgreSQL tuning, CI/CI workflow maintenance, and Docker/Docker-Compose configuration.
October 2024
4 Commits • 1 Features
Oct 1, 2024October 2024: Delivered secure, scalable access to reports via the Reports Management API (list and download PDFs with per-organization data handling, serialization, authentication, and pagination), including rocky REST API for report recipes. Fixed critical auth header handling with tests and added resilience to deployments by making kat-rocky-worker service management conditional on the existence of the systemd unit. Business impact: improved data access security and reliability, reduced deployment errors, and faster report delivery; demonstrated strong API design, testing, and operational excellence.
4 Commits • 1 Features
Oct 1, 2024October 2024: Delivered secure, scalable access to reports via the Reports Management API (list and download PDFs with per-organization data handling, serialization, authentication, and pagination), including rocky REST API for report recipes. Fixed critical auth header handling with tests and added resilience to deployments by making kat-rocky-worker service management conditional on the existence of the systemd unit. Business impact: improved data access security and reliability, reduced deployment errors, and faster report delivery; demonstrated strong API design, testing, and operational excellence.
October 2024
Activity
Loading activity data...
Quality Metrics
Correctness87.6%
Maintainability88.8%
Architecture83.6%
Performance81.6%
AI Usage20.2%
Skills & Technologies
Programming Languages
BashDjangoDockerfileGitHTMLINIJavaScriptJinja2MakefileMarkdown
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI SecurityBGPBackend DevelopmentBug FixBuild AutomationBuild OptimizationBuild SystemsCI/CDCI/CD Pipeline ManagementCode CleanupCode QualityCode Refactoring
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline