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stephendherrera

PROFILE

Stephendherrera

Over five months, this developer delivered data analytics and integration features across mozilla/bigquery-etl, mozilla/looker-spoke-default, and mozmeao/springfield. They built GA4 UID mapping for Firefox Analytics, enhanced user engagement metrics in Looker dashboards, and implemented daily ETL for SEMrush domain analytics. Their work included integrating FxA services with Braze for targeted messaging and adding Plausible analytics with privacy-aware consent controls. Using Python, SQL, and LookML, they focused on data quality, robust ETL processes, and actionable reporting. They also addressed data integrity issues, fixed analytics bugs, and maintained comprehensive documentation and tests to ensure reliability and compliance across systems.

Overall Statistics

Feature vs Bugs

79%Features

Repository Contributions

29Total
Bugs
3
Commits
29
Features
11
Lines of code
96,057
Activity Months5

Work History

June 2026

6 Commits • 2 Features

Jun 1, 2026

June 2026 monthly summary for developer focusing on deliverables across two repositories: mozilla/bigquery-etl and mozmeao/springfield. Key outcomes include the FxA Services Integration with Braze enabling data-driven messaging based on user service authorizations, and the Plausible analytics integration with consent controls and download tracking, gated by feature flags and privacy signals. Also completed data handling fixes and tests improving data quality and compliance, and updated documentation.

April 2026

1 Commits

Apr 1, 2026

April 2026 monthly summary for mozilla/looker-spoke-default: Focused on data integrity improvements in Marketing Analytics. Delivered a fix to correct outdated country mappings in the semrush_domain_overview view, improving accuracy of country-level marketing analytics and decision-making. No new features shipped this month; all effort targeted bug repair and validation.

March 2026

2 Commits • 1 Features

Mar 1, 2026

Summary for 2026-03: Delivered SEMrush Domain Overview enhancements in mozilla/looker-spoke-default, introducing new views and explores to enable richer domain-performance analytics. Fixed a LookML typo (avgerage_rank -> average_rank) to ensure accurate metrics and reduce analytics confusion. These changes establish a foundation for future reporting and dashboards, delivering measurable business value through improved data quality and deeper insights. Key technologies demonstrated include LookML modeling, data quality practices, and collaborative Git-based development.

February 2026

10 Commits • 4 Features

Feb 1, 2026

February 2026: Delivered end-to-end site engagement analytics, expanded domain analytics, and stabilized engagement metrics across the data platform. Implemented new GA4 site engagement data products, backfill workflows, and domain overview capabilities, enabling robust business insights and scalable analytics for Firefox product engagement.

November 2025

10 Commits • 4 Features

Nov 1, 2025

Month: 2025-11 recap focusing on delivered features, bug fixes, and cross-system data integrations that drive business impact. Key outcomes include the GA4 UID mapping feature for Firefox Analytics, the Firefox AI Window News newsletter rebrand, and the Monitor Plus users Braze synchronization, alongside the Mozilla WNP dashboard enhancements for richer engagement analytics. The work emphasizes data quality, reliability, and actionable insights for cross-channel activation.

Activity

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Quality Metrics

Correctness97.2%
Maintainability89.6%
Architecture93.8%
Performance89.0%
AI Usage31.8%

Skills & Technologies

Programming Languages

LookMLPythonSQLYAMLlkml

Technical Skills

API integrationAnalytics IntegrationBackend DevelopmentBigQueryCSPDjangoES6ETLETL processesFrontendFrontend DevelopmentGA4JSDocJavaScriptJinja2

Repositories Contributed To

4 repos

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

mozilla/bigquery-etl

Nov 2025 Jun 2026
3 Months active

Languages Used

PythonSQLYAML

Technical Skills

BigQueryPythonPython scriptingSQLbigquerycloud computing

mozilla/looker-spoke-default

Nov 2025 Apr 2026
4 Months active

Languages Used

SQLlkmlLookML

Technical Skills

LookerSQLdashboard developmentdata analysisdata analyticsGA4

mozmeao/springfield

Jun 2026 Jun 2026
1 Month active

Languages Used

No languages

Technical Skills

Analytics IntegrationBackend DevelopmentCSPDjangoES6Frontend

mozilla/lookml-generator

Feb 2026 Feb 2026
1 Month active

Languages Used

YAML

Technical Skills

LookMLanalyticsdata modeling