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Stefan Ziegler

PROFILE

Stefan Ziegler

Over 17 months, this developer delivered robust data engineering and DevOps solutions across the sogis/gretljobs and sogis/sogis-interlis-repository projects. They architected modular data pipelines, automated ETL workflows, and enhanced data quality through SQL scripting, Gradle build automation, and INTERLIS data modeling. Their work included implementing regulatory-compliant data models, streamlining database migrations, and integrating geospatial datasets. By refactoring build scripts, introducing automated validation, and improving CI/CD reliability, they reduced manual intervention and improved deployment consistency. Their technical approach emphasized maintainability, test coverage, and operational automation, resulting in scalable, reliable data processing and publication workflows for downstream applications and stakeholders.

Overall Statistics

Feature vs Bugs

84%Features

Repository Contributions

110Total
Bugs
8
Commits
110
Features
43
Lines of code
70,862
Activity Months17

Your Network

15 people

Work History

April 2026

5 Commits • 3 Features

Apr 1, 2026

April 2026: Delivered key data modeling and data integration improvements across sogis-interlis-repository and Gretljobs. Implemented new INTERLIS models for energy consultants in Solothurn, standardized model naming and URI conventions, enriched datasets for AGI LKMap publications, and established automated data transfer workflow for energy consultants via Gradle and SQL artifacts. These efforts improve data quality, publication readiness, and operational automation, reducing manual data handling and enabling scalable data processes.

March 2026

8 Commits • 3 Features

Mar 1, 2026

March 2026 summary focusing on delivering a regulatory-aligned solar installation workflow, expanding data processing coverage, and strengthening reporting capabilities. Key outcomes include a new INTERLIS model for the solar installation approval process with updated documentation to reflect new building permit regulations, expanded data sources in the Gretl data pipeline to improve coverage, and a SQL-based processing workflow for solar permits that enhances data handling and integration with public databases. Collectively, these efforts improve data quality, traceability, and compliance while reducing manual data handling and enabling faster, data-driven decision making.

February 2026

4 Commits • 2 Features

Feb 1, 2026

February 2026 highlights include delivering a new attribute values extraction function in GeoW_FunctionsExt with constraint updates, enabling richer metadata extraction; implementing SQLite-based data import and connectivity enhancements in Gretljobs by switching to a dedicated SQLite file, updating file paths and database URI for reliability; and fixing a critical SQL query to reference the correct table, ensuring accurate data retrieval. These changes reduce manual intervention, streamline build and data workflows, and improve data integrity across the sogis/interlis-repository and Gretljobs projects.

January 2026

2 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for sogis/gretljobs: Delivered the initial SQL Data Comparison and CSV Report Generation feature, including a fix for a SQL syntax typo to ensure reliable execution. This work established automated delta reporting between two databases and generated CSV diffs for quick validation and audit readiness. Added basic test coverage to validate behavior and guard against regressions.

December 2025

4 Commits • 2 Features

Dec 1, 2025

December 2025 monthly summary focusing on delivering business value and robust technical achievements across two repositories. Highlights include a major data model upgrade for Kartenkatalog and a new data transfer workflow with corresponding build reliability fixes. The work emphasizes data quality, streamlined data operations, and stable deployment pipelines.

November 2025

7 Commits • 2 Features

Nov 1, 2025

November 2025: Focused on data reliability, validation, and accuracy across two repositories. Delivered a pre-import GELAN file size check to prevent incomplete or empty downloads, introduced an INTERLIS models directory to boost data validation and references for the dmav project, and fixed data integrity issues in Materials SQL queries (naming and type conditions) to ensure accurate categorization and reporting. These efforts reduce failed imports, improve data quality, and enhance downstream analytics.

October 2025

2 Commits • 1 Features

Oct 1, 2025

October 2025: sogis/sogis-interlis-repository - Focused improvement on asset organization and deployment integration for LMK. Reorganized DMAV_V1_0_Validierung assets into a replaced subdirectory and updated the Docker deployment to include LMK model assets, ensuring the LMK model is copied and accessible in the Docker image. No separate bug-fix releases were required this month; the emphasis was on structural clarity and deployment reliability to support LMK-based deployments.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025: Delivered DataHub Data Repository Integration for sogis/sogis-interlis-repository. Added new data repository configuration for 'datahub' to the ilisite configuration, enabling access to DataHub data within the ilisite application. This work improves data accessibility, streamlines data discovery for downstream services, and strengthens the data integration capabilities of the ilisite platform.

August 2025

5 Commits • 2 Features

Aug 1, 2025

2025-08 Monthly performance summary for sogis/sogis-interlis-repository. Focused on delivering interoperability improvements and advanced data-model enhancements with clear traceability to code commits. Primary work centered on UI/UX alignment across embedded content and establishing richer data ownership structures through INTERLIS model updates, laying groundwork for upcoming releases.

June 2025

3 Commits • 1 Features

Jun 1, 2025

June 2025: Delivered key data workflow improvements and a critical bug fix in the sogis/gretljobs repository, enhancing data reliability, testability, and maintainability. The changes focus on data upload processes, spatial data extraction, and build/config cleanliness, translating into measurable business value such as more reliable data uploads and higher data integrity for geospatial data.

May 2025

6 Commits • 3 Features

May 1, 2025

May 2025 monthly summary for sogis/gretljobs: Delivered four targeted items that improve data quality, ingestion reliability, and testing coverage, translating into faster, more accurate data availability for downstream systems and stakeholders. Key features include updating agi_av_meldewesen to identify using building name, including EGID in outputs, and updating the README for clarity; migrating denkmalschutz inserts to the versioned ada_denkmalschutz_pub_v1 schema to ensure correct data insertion; enabling MGDM data version 1.5 with updated upload task to publish the latest data and making publish depend on the updated upload task; establishing an SFTP upload test infrastructure via arp_sein_upload_test module and corresponding test configuration to validate end-to-end uploads. This work demonstrates strong SQL/versioned schema handling, data pipeline orchestration, and test automation.

April 2025

16 Commits • 3 Features

Apr 1, 2025

Delivered key data model cleanup, build, and workflow improvements for sogis/gretljobs in 2025-04, with a focus on data integrity, build reliability, and operability across environments.

March 2025

12 Commits • 5 Features

Mar 1, 2025

Monthly summary for 2025-03 - sogis/gretljobs: Key features delivered, major fixes, and overall impact. Focused on enabling municipality data processing, improving validation, and expanding data integration capabilities across multiple PUB data streams. Demonstrated strong data engineering practices, maintainability, and value delivery for data pipelines used by downstream applications.

February 2025

19 Commits • 6 Features

Feb 1, 2025

February 2025 highlights across sogis/gretljobs, focusing on delivering features that enable lean configurations, strengthen data quality, and automate reporting. Key outcomes include lifecycle management for demo configurations, data-quality automation across databases, and broader dataset integration with improved scheduling and cleanup of legacy artifacts.

January 2025

5 Commits • 4 Features

Jan 1, 2025

January 2025 delivered foundational enhancements across testing, tooling, and data modeling for sogis/interlis projects. Key work included scaffolding for external content embedding, tooling upgrades to improve build stability, and the introduction of a new INTERLIS 2.3 data model and associated Denkmal dataset model to enable SEin-App configuration and oereb-db integrations. These efforts increase testability, interoperability, and long-term maintainability, with outcomes ready for broader adoption in downstream repositories.

December 2024

3 Commits • 1 Features

Dec 1, 2024

Dec 2024 monthly summary for sogis/gretljobs focusing on delivering business value through data quality improvements and developer experience enhancements. Highlights include a historical date normalization fix to ensure valid Interlis Gregorian dates, and DX improvements to local build performance and Gradle maintenance.

November 2024

8 Commits • 3 Features

Nov 1, 2024

Month: 2024-11 — Key outcomes: Delivered a modular overhaul of the data import/transfer pipeline for sogis/gretljobs, created modular scripts for buildings, dwellings, and codes, and wired the new transfer task into the workflow. Implemented a default legalforce = TRUE for network areas in the netzgebiete publication path to improve publication accuracy and governance. Completed build/config hygiene with macOS executable bit fixes for docker-compose files, added job.properties, and removed obsolete resources to reduce deployment friction. The changes collectively improve data quality, pipeline reliability, and compliance, delivering tangible business value through faster data processing, safer public releases, and easier maintenance.

Activity

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Quality Metrics

Correctness87.6%
Maintainability88.6%
Architecture83.0%
Performance82.4%
AI Usage20.2%

Skills & Technologies

Programming Languages

DockerfileGradleGroovyHTMLILIINIINTERLISJavaScriptMarkdownProperties

Technical Skills

Build AutomationBuild ConfigurationBuild Script DevelopmentBuild ScriptingCI/CDCloud Storage UploadCode RefactoringConfigurationConfiguration ManagementContainerizationData EngineeringData ImportData ModelingData ProcessingData Processing Pipeline

Repositories Contributed To

2 repos

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

sogis/gretljobs

Nov 2024 Apr 2026
13 Months active

Languages Used

GradleGroovySQLXSLTYAMLPropertiesINIINTERLIS

Technical Skills

Build AutomationCI/CDConfiguration ManagementDatabaseDatabase ManagementDatabase Migration

sogis/sogis-interlis-repository

Jan 2025 Apr 2026
9 Months active

Languages Used

DockerfileGradleHTMLINTERLISILIJavaScriptUMLXML

Technical Skills

Build AutomationData ModelingDependency ManagementDevOpsFront-end DevelopmentINTERLIS