Open-Earth-Foundation/CityCatalyst
Nov 2024 – Aug 2025
8 Months active
Languages Used
PythonTypeScriptCSVJSONJavaScriptYAMLSQL
Technical Skills
Backend DevelopmentData HandlingData ModelingFull stack developmentData ManagementBug Fix
mfonseca
PROFILE
Mfonseca
Maureen contributed to the Open-Earth-Foundation/CityCatalyst repository by engineering robust data models and backend systems to support advanced emissions reporting, sanitation analytics, and regulatory compliance. She integrated new data sources, standardized data pipelines, and expanded schema support for complex calculations, leveraging Python, SQLAlchemy, and Pandas. Her work included developing API endpoints for IPCC formula inputs, implementing database migrations with Alembic, and enhancing internationalization. By focusing on data integrity, migration reliability, and scalable ETL processes, Maureen enabled more granular analytics and improved data governance. Her contributions addressed both feature development and bug fixes, demonstrating depth in backend and data engineering.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
36Total
Bugs
6
Commits
36
Features
14
Lines of code
24,356
Activity Months8
Your Network
24 people
Work History
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: CityCatalyst delivered Scope 2 Emissions Data Ingestion, adding electricity emissions factors data with raw and processed CSVs by country/zone, plus new data source and methodology files linked to processed emissions data. This work improves Scope 2 coverage, data provenance, and readiness for sustainability reporting.
1 Commits • 1 Features
Aug 1, 2025August 2025: CityCatalyst delivered Scope 2 Emissions Data Ingestion, adding electricity emissions factors data with raw and processed CSVs by country/zone, plus new data source and methodology files linked to processed emissions data. This work improves Scope 2 coverage, data provenance, and readiness for sustainability reporting.
August 2025
July 2025
6 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for Open-Earth-Foundation/CityCatalyst. Focused on enhancing data quality, API access to IPCC-related inputs, and robust schema migrations to support scalable emissions modeling and regulatory reporting.
July 2025
6 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for Open-Earth-Foundation/CityCatalyst. Focused on enhancing data quality, API access to IPCC-related inputs, and robust schema migrations to support scalable emissions modeling and regulatory reporting.
May 2025
3 Commits • 2 Features
May 1, 2025May 2025 — CityCatalyst: Delivered core rule engine enhancements and data model upgrades that drive accuracy, transparency, and analytics. Key outcomes include the introduction of an exclusive 'all' rule type, enabling unambiguous rule precedence; addition of the 'composition' field to Waste for granular reporting; and a small but important readability improvement by renaming 'type-all' to 'vehicle-type-all'. These changes improve decision integrity, enable richer operational metrics, and enhance code maintainability.
3 Commits • 2 Features
May 1, 2025May 2025 — CityCatalyst: Delivered core rule engine enhancements and data model upgrades that drive accuracy, transparency, and analytics. Key outcomes include the introduction of an exclusive 'all' rule type, enabling unambiguous rule precedence; addition of the 'composition' field to Waste for granular reporting; and a small but important readability improvement by renaming 'type-all' to 'vehicle-type-all'. These changes improve decision integrity, enable richer operational metrics, and enhance code maintainability.
May 2025
April 2025
7 Commits • 4 Features
Apr 1, 2025April 2025 focused on delivering scalable data-model improvements, stronger integration observability, and broader user reach for CityCatalyst. Key outcomes include new feedback integration displays, JSONB-ready schema enhancements, flight-type categorization, and Portuguese localization, alongside fixes to ensure reliable migrations. These workstreams collectively improve analytics capacity, data representation, operational reliability, and global accessibility, contributing to faster onboarding for new users and more robust cross-system integrations.
April 2025
7 Commits • 4 Features
Apr 1, 2025April 2025 focused on delivering scalable data-model improvements, stronger integration observability, and broader user reach for CityCatalyst. Key outcomes include new feedback integration displays, JSONB-ready schema enhancements, flight-type categorization, and Portuguese localization, alongside fixes to ensure reliable migrations. These workstreams collectively improve analytics capacity, data representation, operational reliability, and global accessibility, contributing to faster onboarding for new users and more robust cross-system integrations.
March 2025
2 Commits • 1 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on the CityCatalyst repo. Delivered a feature to support data source prioritization and fixed a schema-related migration to ensure correct application of changes. This work enhances data quality, prioritization accuracy, and deployment reliability across systems relying on CityCatalyst.
2 Commits • 1 Features
Mar 1, 2025Concise monthly summary for 2025-03 focusing on the CityCatalyst repo. Delivered a feature to support data source prioritization and fixed a schema-related migration to ensure correct application of changes. This work enhances data quality, prioritization accuracy, and deployment reliability across systems relying on CityCatalyst.
March 2025
January 2025
12 Commits • 1 Features
Jan 1, 2025January 2025 — CityCatalyst project: Delivered foundational data enhancements and data quality improvements that strengthen sanitation metrics analytics and downstream decision-making. Implemented new data sources and data foundation for sanitation metrics (SNIS, SINIR; MCF from C40 CIRIS and FAOSTAT daily protein consumption) with CSV-based data generation scripts. Standardized wastewater data inputs to ensure accurate calculations and consistent user-facing labels, addressing data integrity across multiple datasets. These efforts reduce data ambiguity, improve dashboards, and enable scalable data integrations for future data sources and metrics.
January 2025
12 Commits • 1 Features
Jan 1, 2025January 2025 — CityCatalyst project: Delivered foundational data enhancements and data quality improvements that strengthen sanitation metrics analytics and downstream decision-making. Implemented new data sources and data foundation for sanitation metrics (SNIS, SINIR; MCF from C40 CIRIS and FAOSTAT daily protein consumption) with CSV-based data generation scripts. Standardized wastewater data inputs to ensure accurate calculations and consistent user-facing labels, addressing data integrity across multiple datasets. These efforts reduce data ambiguity, improve dashboards, and enable scalable data integrations for future data sources and metrics.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Open-Earth-Foundation/CityCatalyst: Delivered expansion of the Industry Type Catalog to support broader categorization options, enabling more granular analytics and improved downstream workflows. Completed a minor typing error fix with no functional changes, maintaining code quality and stability. All changes were reviewed and committed in the CityCatalyst repository, contributing to better data governance and developer efficiency.
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Open-Earth-Foundation/CityCatalyst: Delivered expansion of the Industry Type Catalog to support broader categorization options, enabling more granular analytics and improved downstream workflows. Completed a minor typing error fix with no functional changes, maintaining code quality and stability. All changes were reviewed and committed in the CityCatalyst repository, contributing to better data governance and developer efficiency.
December 2024
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for Open-Earth-Foundation/CityCatalyst. Delivered significant enhancements to emissions reporting by extending the data model to accommodate Scope 3, AFOLU, and IPPU calculations, along with new activity options. This groundwork enables more comprehensive and standards-aligned sustainability reporting for key stakeholders.
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for Open-Earth-Foundation/CityCatalyst. Delivered significant enhancements to emissions reporting by extending the data model to accommodate Scope 3, AFOLU, and IPPU calculations, along with new activity options. This groundwork enables more comprehensive and standards-aligned sustainability reporting for key stakeholders.
Activity
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Quality Metrics
Correctness90.0%
Maintainability90.4%
Architecture88.4%
Performance86.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
CSVJSONJavaScriptPythonSQLTypeScriptYAML
Technical Skills
API DevelopmentAPI IntegrationAlembicBackend DevelopmentBug FixCSV ManipulationData CleaningData EngineeringData HandlingData IntegrationData ManagementData ModelingData ProcessingData TransformationData Validation
Repositories Contributed To
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