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Cláudio Esperança

PROFILE

Cláudio Esperança

Over six months, Carlos Esperança advanced localization and accessibility across the thunderbird/thunderbird-l10n and mozilla-l10n/www-l10n repositories. He migrated legacy DTD and properties strings to the Fluent format, improving translation consistency and maintainability for Portuguese (Portugal) users. Carlos enhanced UI components by introducing pluralization frameworks, ARIA accessibility attributes, and new feedback strings, addressing both user experience and internationalization scalability. His work leveraged JavaScript, FTL, and Pontoon localization tooling, integrating QA-driven validation and cross-functional collaboration. By focusing on front end development and localization modernization, Carlos reduced translation debt and improved accessibility, resulting in a more robust, user-friendly multilingual interface.

Overall Statistics

Feature vs Bugs

89%Features

Repository Contributions

11Total
Bugs
1
Commits
11
Features
8
Lines of code
91
Activity Months6

Your Network

375 people

Shared Repositories

375

Work History

April 2026

2 Commits • 1 Features

Apr 1, 2026

April 2026 performance summary for thunderbird/thunderbird-l10n: Completed cross-component Fluent localization migration for Account Hub onboarding and Thunderbird UI (message retention). Implemented a two-part migration to Fluent to improve localization consistency, translation workflow, and user experience across locales. Commits align with Bug 1929702 and Bug 1744107, enabling maintainability and smoother future updates.

March 2026

2 Commits • 2 Features

Mar 1, 2026

In March 2026, delivered two key features for thunderbird/thunderbird-l10n and advanced accessibility and localization improvements. The work focused on enhancing search UX and accessibility, with Fluent-driven UI migration and ARIA enhancements, aligning with business goals for better filtering, inclusivity, and localization quality. These changes improve user productivity and reduce friction for assistive technology users, while laying groundwork for consistent UI localization.

February 2026

3 Commits • 3 Features

Feb 1, 2026

February 2026: Localization enhancements and migration work completed in thunderbird/thunderbird-l10n, focusing on improving UI localization, consistency across components, and setting up a pluralization-based workflow for long-term maintenance.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for thunderbird/thunderbird-l10n: Focused on advancing localization modernization for search-related UI by migrating remaining searchWidgets strings and related assets to Fluent, and by introducing user-facing feedback improvements in the address book search dialog. This work reduces translation maintenance overhead, improves consistency across locales, and lays groundwork for scalable internationalization.

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025: Delivered localization modernization for Thunderbird Portuguese (Portugal) by migrating spam-related strings from DTD to Fluent, updating button labels and dialog text. This work reduces translation debt, enhances consistency across the PT-PT UI, and paves the way for broader Fluent adoption across thunderbird-l10n.

December 2024

1 Commits

Dec 1, 2024

Monthly summary for 2024-12: Localization-focused sprint for PT-PT on mozilla-l10n/www-l10n. Key deliverable: fixed a grammatical issue in the Portuguese (Portugal) translation for the 'reporting web compatibility issues' flow, improving natural phrasing for end users. Implemented via a Pontoon-driven update and committed as 2e24e74d474869c6d6b3972b83b18b39ba83fb73. The work was reviewed and validated against QA checks to ensure consistency with Mozilla localization standards. Result: clearer guidance for PT-PT users, reduced friction in reporting issues, and improved overall localization quality. Technologies/skills demonstrated: Pontoon localization tooling, Git-based workflow, QA-driven localization validation, cross-functional collaboration with localization teams.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage23.6%

Skills & Technologies

Programming Languages

FTLJavaScriptftlproperties

Technical Skills

LocalizationTranslationaccessibilityfront end developmentinternationalizationlocalizationsoftware development

Repositories Contributed To

2 repos

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

thunderbird/thunderbird-l10n

Oct 2025 Apr 2026
5 Months active

Languages Used

propertiesFTLJavaScript

Technical Skills

Localizationfront end developmentinternationalizationlocalizationsoftware developmentaccessibility

mozilla-l10n/www-l10n

Dec 2024 Dec 2024
1 Month active

Languages Used

ftl

Technical Skills

LocalizationTranslation