Amsterdam/amsterdam-schema
Feb 2025 – Dec 2025
9 Months active
Languages Used
NginxCSSHTMLJavaScriptXMLINIPythonYAML
Technical Skills
DevOpsServer ConfigurationDocumentationSchema DesignTechnical WritingJSON Schema
Jasper Jager
PROFILE
Jasper Jager
Over nine months, J. Jager engineered schema versioning, validation, and governance enhancements for the Amsterdam/amsterdam-schema repository. He introduced Meta Schema v3 and v4, enabling version-aware routing and dataset lifecycle management, and refactored schema validation workflows to improve reliability and maintainability. Using Python, JSON Schema, and GitHub Actions, Jager streamlined CI pipelines, implemented explicit workflow permissions, and upgraded tooling for compatibility and security. His work included adding lifecycle status fields, refining dataset versioning, and strengthening data governance through CODEOWNERS updates. The depth of his contributions ensured stable migrations, reduced deployment risk, and established a robust foundation for future schema evolution.
Overall Statistics
Feature vs Bugs
77%Features
Repository Contributions
26Total
Bugs
3
Commits
26
Features
10
Lines of code
28,562
Activity Months9
Your Network
66 people
Work History
December 2025
8 Commits • 1 Features
Dec 1, 2025December 2025: Delivered Amsterdam Schema v4 rollout with dataset lifecycle enhancements, aligning all datasets to v4 references, removing legacy dependencies, and upgrading tooling for compatibility. Implemented development tooling for schema standards, added a pre-commit hook validating localhost, and refreshed docs to reflect v4 workflows. These changes stabilize migrations, reduce risk, and enable faster, more reliable data operations across environments. Technologies demonstrated include versioned schema migrations, tooling modernization, CI/QC improvements, and cross-team collaboration.
8 Commits • 1 Features
Dec 1, 2025December 2025: Delivered Amsterdam Schema v4 rollout with dataset lifecycle enhancements, aligning all datasets to v4 references, removing legacy dependencies, and upgrading tooling for compatibility. Implemented development tooling for schema standards, added a pre-commit hook validating localhost, and refreshed docs to reflect v4 workflows. These changes stabilize migrations, reduce risk, and enable faster, more reliable data operations across environments. Technologies demonstrated include versioned schema migrations, tooling modernization, CI/QC improvements, and cross-team collaboration.
December 2025
November 2025
6 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for Amsterdam/amsterdam-schema focusing on business value and technical achievements. Delivered Amsterdam Schema v4 with extended properties for datasets, tables, and metadata, plus dataset versioning changes documented (including enableAPI flag and removal of the status field). Strengthened governance by updating CODEOWNERS and adding datadiensten as co-owners for BOR and BENK datasets to improve collaboration and accountability. Executed internal tooling and policy improvements by upgrading schematools to 8.7.2 and refining the ignore policy to exclude index files, supporting maintainability and faster release cycles.
November 2025
6 Commits • 3 Features
Nov 1, 2025November 2025 monthly summary for Amsterdam/amsterdam-schema focusing on business value and technical achievements. Delivered Amsterdam Schema v4 with extended properties for datasets, tables, and metadata, plus dataset versioning changes documented (including enableAPI flag and removal of the status field). Strengthened governance by updating CODEOWNERS and adding datadiensten as co-owners for BOR and BENK datasets to improve collaboration and accountability. Executed internal tooling and policy improvements by upgrading schematools to 8.7.2 and refining the ignore policy to exclude index files, supporting maintainability and faster release cycles.
October 2025
2 Commits • 1 Features
Oct 1, 2025Monthly summary for 2025-10: Amsterdam/amsterdam-schema focused on delivering version management and compatibility updates to ensure consistent datasets, workflows, and setup configurations. Aligned dataset versions for bestuur and kengetallen to 1.0.1 and upgraded Amsterdam schema tools to 8.5.1, enabling reliable upgrades and smoother migrations. Also fixed version numbering in schoolgebouwen and reinforced dependency consistency across the repository.
2 Commits • 1 Features
Oct 1, 2025Monthly summary for 2025-10: Amsterdam/amsterdam-schema focused on delivering version management and compatibility updates to ensure consistent datasets, workflows, and setup configurations. Aligned dataset versions for bestuur and kengetallen to 1.0.1 and upgraded Amsterdam schema tools to 8.5.1, enabling reliable upgrades and smoother migrations. Also fixed version numbering in schoolgebouwen and reinforced dependency consistency across the repository.
October 2025
August 2025
1 Commits
Aug 1, 2025Monthly summary for 2025-08 focused on Amsterdam/amsterdam-schema. Delivered a bug fix to the dataset validation workflow in CI by correcting path references and ensuring validation uses the correct output from the previous step. This change stabilized the dataset validation pipeline, reduced intermittent CI failures, and improved data quality and release confidence.
August 2025
1 Commits
Aug 1, 2025Monthly summary for 2025-08 focused on Amsterdam/amsterdam-schema. Delivered a bug fix to the dataset validation workflow in CI by correcting path references and ensuring validation uses the correct output from the previous step. This change stabilized the dataset validation pipeline, reduced intermittent CI failures, and improved data quality and release confidence.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Amsterdam/amsterdam-schema: Implemented security and stability improvements with explicit GitHub Actions workflow permissions across validation pipelines (read access to contents; write access to PRs; restricted permissions on select workflows). Performed schema cleanup to remove a non-existent relation, ensuring consistency without code changes. Documented that a user-reported display name issue is external/config-based with no repository changes, reducing unnecessary rework. The changes improve CI governance, data-model integrity, and user experience.
3 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Amsterdam/amsterdam-schema: Implemented security and stability improvements with explicit GitHub Actions workflow permissions across validation pipelines (read access to contents; write access to PRs; restricted permissions on select workflows). Performed schema cleanup to remove a non-existent relation, ensuring consistency without code changes. Documented that a user-reported display name issue is external/config-based with no repository changes, reducing unnecessary rework. The changes improve CI governance, data-model integrity, and user experience.
June 2025
May 2025
2 Commits • 1 Features
May 1, 2025May 2025: Amsterdam/amsterdam-schema — Delivered Schema Versioning System Hardening and Tooling Upgrade. Hardened the schema versioning workflow by upgrading the validation tooling and refactoring versioned table file handling to improve maintainability and reliability. No major bugs fixed this month. Impact: Reduced deployment risk for schema changes, faster validation cycles, and clearer change history. Technologies/skills demonstrated: tooling upgrades, code refactoring, versioned data management, and schema validation practices.
May 2025
2 Commits • 1 Features
May 1, 2025May 2025: Amsterdam/amsterdam-schema — Delivered Schema Versioning System Hardening and Tooling Upgrade. Hardened the schema versioning workflow by upgrading the validation tooling and refactoring versioned table file handling to improve maintainability and reliability. No major bugs fixed this month. Impact: Reduced deployment risk for schema changes, faster validation cycles, and clearer change history. Technologies/skills demonstrated: tooling upgrades, code refactoring, versioned data management, and schema validation practices.
April 2025
1 Commits • 1 Features
Apr 1, 2025Month: 2025-04 — Summary: Delivered the Amsterdam Schema lifecycleStatus feature to classify datasets and tables as 'experimental' or 'stable'. This change clarifies development stage, improves governance, and supports safer data pipelines. Updated schema definitions and documentation to incorporate the new status. Release includes meta schema v3.1.0 (commit 0fb1d549eedf0df06ba3ad29f5def4d6e60eaaf5). Major bugs fixed: none reported this month.
1 Commits • 1 Features
Apr 1, 2025Month: 2025-04 — Summary: Delivered the Amsterdam Schema lifecycleStatus feature to classify datasets and tables as 'experimental' or 'stable'. This change clarifies development stage, improves governance, and supports safer data pipelines. Updated schema definitions and documentation to incorporate the new status. Release includes meta schema v3.1.0 (commit 0fb1d549eedf0df06ba3ad29f5def4d6e60eaaf5). Major bugs fixed: none reported this month.
April 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 — Amsterdam/amsterdam-schema: Delivered Version 3 dataset versioning enhancements, including a new 'versie' section, updated table versioning, and refined scope references to improve data version management. This enables clearer data lineage, reproducibility, and governance across datasets. Documentation updated (commit f9cefc9bd1bc942dfad93e9018621fa211eed1b5). No major bugs reported; no hotfixes required. Business impact: improved data quality, faster onboarding for new datasets, and stronger governance. Skills demonstrated: schema design with versioning, documentation discipline, and Git-based collaboration.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 — Amsterdam/amsterdam-schema: Delivered Version 3 dataset versioning enhancements, including a new 'versie' section, updated table versioning, and refined scope references to improve data version management. This enables clearer data lineage, reproducibility, and governance across datasets. Documentation updated (commit f9cefc9bd1bc942dfad93e9018621fa211eed1b5). No major bugs reported; no hotfixes required. Business impact: improved data quality, faster onboarding for new datasets, and stronger governance. Skills demonstrated: schema design with versioning, documentation discipline, and Git-based collaboration.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on the Amsterdam/amsterdam-schema work stream. Delivered schema versioning enhancements that establish a safe, backwards-compatible path for schema evolution by introducing Meta Schema v3 and enabling version-aware routing for v2/v3 deployments. Implemented a new Meta Schema file pointing to the schema@v3 directory and updated Nginx rewrite rules to support versioned URLs, laying the foundation for future schema updates and smoother client migrations.
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on the Amsterdam/amsterdam-schema work stream. Delivered schema versioning enhancements that establish a safe, backwards-compatible path for schema evolution by introducing Meta Schema v3 and enabling version-aware routing for v2/v3 deployments. Implemented a new Meta Schema file pointing to the schema@v3 directory and updated Nginx rewrite rules to support versioned URLs, laying the foundation for future schema updates and smoother client migrations.
February 2025
Activity
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Quality Metrics
Correctness96.2%
Maintainability94.6%
Architecture94.6%
Performance93.0%
AI Usage21.6%
Skills & Technologies
Programming Languages
CSSHTMLINIJSONJavaScriptMarkdownNginxNonePythonXML
Technical Skills
API designAPI developmentCI/CDCode RefactoringConfiguration ManagementContinuous IntegrationDependency ManagementDevOpsDocumentationFile ManagementGitGitHub ActionsJSON SchemaJSON schema designNone
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