signalapp/Signal-iOS
Oct 2024 – Oct 2025
11 Months active
Languages Used
SwiftObjective-CTextXMLplistLocalization
Technical Skills
ConfigurationiOS DevelopmentData SerializationError HandlingFeature Flag ManagementLogging
Harry Sanabria
PROFILE
Harry Sanabria
Harry contributed to the signalapp/Signal-iOS repository by delivering a range of stability, reliability, and internationalization improvements over 11 months. He enhanced backup workflows, refined attachment handling, and improved data integrity through defensive programming and targeted bug fixes. Using Swift and Objective-C, Harry addressed edge cases in file handling, logging, and database querying, while also managing configuration and release processes. His work included refining localization and translation management, updating UI language handling, and ensuring accurate progress tracking for backups. These efforts resulted in a more robust, maintainable codebase and a smoother user experience, demonstrating depth in iOS development and error handling.
Overall Statistics
Feature vs Bugs
48%Features
Repository Contributions
28Total
Bugs
11
Commits
28
Features
10
Lines of code
7,855
Activity Months11
Your Network
72 people
Work History
October 2025
1 Commits
Oct 1, 2025In Oct 2025, delivered a stability-focused update for signalapp/Signal-iOS by addressing a critical deserialization edge case in ListMediaIntegrityCheckResult. The fix prevents a crash by making notScheduledForUploadCount an optional Int with a default of 0 when nil, and applying the change consistently in both the view controller and the backup manager. This aligns with defensive data handling and robust media integrity checks during uploads.
1 Commits
Oct 1, 2025In Oct 2025, delivered a stability-focused update for signalapp/Signal-iOS by addressing a critical deserialization edge case in ListMediaIntegrityCheckResult. The fix prevents a crash by making notScheduledForUploadCount an optional Int with a default of 0 when nil, and applying the change consistently in both the view controller and the backup manager. This aligns with defensive data handling and robust media integrity checks during uploads.
October 2025
September 2025
1 Commits
Sep 1, 2025September 2025 monthly summary for signalapp/Signal-iOS. Focused on reliability and data accuracy improvements with targeted maintenance work. No new user-facing features delivered this month; the emphasis was on ensuring internal data displays reflect correct states and reduce confusion in internal review workflows.
September 2025
1 Commits
Sep 1, 2025September 2025 monthly summary for signalapp/Signal-iOS. Focused on reliability and data accuracy improvements with targeted maintenance work. No new user-facing features delivered this month; the emphasis was on ensuring internal data displays reflect correct states and reduce confusion in internal review workflows.
August 2025
3 Commits
Aug 1, 2025August 2025 — Signal-iOS stability and observability improvements. Key delivered work focused on logging hygiene and defensive file handling. By removing a redundant log for empty message bodies and ensuring empty bodies don’t trigger error logs, log readability and fault diagnosis improved. We also corrected byte count logging for attachment uploads when progress isn’t provided, reducing misleading metrics. Additionally, guards were added to prevent crashes from invalid file data slice lengths when the start index exceeds total data length, enhancing app robustness. These changes reduce support effort and enable faster debugging, while demonstrating strong attention to edge cases and maintainable code.
3 Commits
Aug 1, 2025August 2025 — Signal-iOS stability and observability improvements. Key delivered work focused on logging hygiene and defensive file handling. By removing a redundant log for empty message bodies and ensuring empty bodies don’t trigger error logs, log readability and fault diagnosis improved. We also corrected byte count logging for attachment uploads when progress isn’t provided, reducing misleading metrics. Additionally, guards were added to prevent crashes from invalid file data slice lengths when the start index exceeds total data length, enhancing app robustness. These changes reduce support effort and enable faster debugging, while demonstrating strong attention to edge cases and maintainable code.
August 2025
July 2025
1 Commits
Jul 1, 2025July 2025: Delivered a critical bug fix in Signal-iOS addressing the attachment offloading timestamp validation. Corrected inverted condition so attachments are only offloaded after the defined threshold. This fixes incorrect offloads, reduces unnecessary network usage and battery consumption, and improves reliability of attachment handling. The fix is tracked under commit 4906b5aba32c20d0aa7ab99da377b489c0fbb3a5 ("Fix inverted offloading timestamp check").
July 2025
1 Commits
Jul 1, 2025July 2025: Delivered a critical bug fix in Signal-iOS addressing the attachment offloading timestamp validation. Corrected inverted condition so attachments are only offloaded after the defined threshold. This fixes incorrect offloads, reduces unnecessary network usage and battery consumption, and improves reliability of attachment handling. The fix is tracked under commit 4906b5aba32c20d0aa7ab99da377b489c0fbb3a5 ("Fix inverted offloading timestamp check").
June 2025
4 Commits • 1 Features
Jun 1, 2025June 2025 - Signal-iOS: Key reliability improvements across media handling and attachment uploads. Reduced resource usage by fixing thumbnail generation skip logic; hardened attachments during re-encryption with integrity checks and removed a redundant assertion; ensured accurate non-primary device media listing by fixing boolean logic. Impact includes fewer failed uploads, more reliable media sync across devices, and a smoother user experience. Technologies demonstrated include Swift/iOS, cryptographic re-encryption flows, boolean logic debugging, and codebase hygiene.
4 Commits • 1 Features
Jun 1, 2025June 2025 - Signal-iOS: Key reliability improvements across media handling and attachment uploads. Reduced resource usage by fixing thumbnail generation skip logic; hardened attachments during re-encryption with integrity checks and removed a redundant assertion; ensured accurate non-primary device media listing by fixing boolean logic. Impact includes fewer failed uploads, more reliable media sync across devices, and a smoother user experience. Technologies demonstrated include Swift/iOS, cryptographic re-encryption flows, boolean logic debugging, and codebase hygiene.
June 2025
May 2025
4 Commits • 3 Features
May 1, 2025May 2025 monthly summary for signalapp/Signal-iOS focusing on user-facing backup improvements, release readiness, and code quality enhancements. The month delivered targeted UX enhancements for backups, a 7.60 release bump, and lint-driven code cleanup, with clear commit-level traceability for future audits and rollbacks.
May 2025
4 Commits • 3 Features
May 1, 2025May 2025 monthly summary for signalapp/Signal-iOS focusing on user-facing backup improvements, release readiness, and code quality enhancements. The month delivered targeted UX enhancements for backups, a 7.60 release bump, and lint-driven code cleanup, with clear commit-level traceability for future audits and rollbacks.
April 2025
1 Commits
Apr 1, 2025April 2025: Focused on stability and correctness in the backup flow for Signal iOS (signalapp/Signal-iOS). Implemented a unit-count integrity guard for backup attachment downloads to prevent overflow and ensure completed units never exceed total units, safeguarding progress accuracy and data integrity during backups. The change reduces the risk of corrupted backups and misleading progress indicators, delivered via a defensive fix in a single commit.
1 Commits
Apr 1, 2025April 2025: Focused on stability and correctness in the backup flow for Signal iOS (signalapp/Signal-iOS). Implemented a unit-count integrity guard for backup attachment downloads to prevent overflow and ensure completed units never exceed total units, safeguarding progress accuracy and data integrity during backups. The change reduces the risk of corrupted backups and misleading progress indicators, delivered via a defensive fix in a single commit.
April 2025
January 2025
4 Commits • 2 Features
Jan 1, 2025Summary for 2025-01: In Signal-iOS, completed two core feature improvements and fixed two high-impact bugs, delivering measurable business value through reliability and consistency enhancements. Key features delivered: backup error handling and logging improvements; CVComponentGenericAttachment font usage refactor. Major bugs fixed: link'n'sync progress indicator stabilization; linked device messaging localization correction. Overall impact: more reliable backups and syncing experiences, reduced user confusion, and a cleaner, more maintainable UI/font management. Technologies demonstrated: debugging, refactoring, error handling, i18n, and font management.
January 2025
4 Commits • 2 Features
Jan 1, 2025Summary for 2025-01: In Signal-iOS, completed two core feature improvements and fixed two high-impact bugs, delivering measurable business value through reliability and consistency enhancements. Key features delivered: backup error handling and logging improvements; CVComponentGenericAttachment font usage refactor. Major bugs fixed: link'n'sync progress indicator stabilization; linked device messaging localization correction. Overall impact: more reliable backups and syncing experiences, reduced user confusion, and a cleaner, more maintainable UI/font management. Technologies demonstrated: debugging, refactoring, error handling, i18n, and font management.
December 2024
4 Commits • 2 Features
Dec 1, 2024December 2024: Focused on stability improvements and internationalization for Signal-iOS. Delivered targeted housekeeping by deprecating the MessageAttachmentMigrationTask in BGTaskSchedulerPermittedIdentifiers and performing a minor packaging version bump to 7.41, reducing legacy surface area and easing future updates. Implemented localization and UI language updates with refreshed translations and UI language handling, and updated release notes to reflect these changes. These efforts improved stability, packaging reliability, and global user experience, while simplifying maintenance and future feature rollouts.
4 Commits • 2 Features
Dec 1, 2024December 2024: Focused on stability improvements and internationalization for Signal-iOS. Delivered targeted housekeeping by deprecating the MessageAttachmentMigrationTask in BGTaskSchedulerPermittedIdentifiers and performing a minor packaging version bump to 7.41, reducing legacy surface area and easing future updates. Implemented localization and UI language updates with refreshed translations and UI language handling, and updated release notes to reflect these changes. These efforts improved stability, packaging reliability, and global user experience, while simplifying maintenance and future feature rollouts.
December 2024
November 2024
4 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for signalapp/Signal-iOS: Focused improvements to message backup reliability, correctness, and controlled rollout, delivering tangible business value through data integrity, reduced restoration failures, and safer feature releases.
November 2024
4 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for signalapp/Signal-iOS: Focused improvements to message backup reliability, correctness, and controlled rollout, delivering tangible business value through data integrity, reduced restoration failures, and safer feature releases.
October 2024
1 Commits
Oct 1, 20242024-10 monthly summary for signalapp/Signal-iOS: Delivered a critical bug fix to stabilize the internal Link’n’SYNC flow by extending the timeout from 4 minutes to 60 minutes, addressing premature timeouts during long internal synchronization runs. This change improves the reliability of internal testing and CI throughput with minimal risk and clear business value.
1 Commits
Oct 1, 20242024-10 monthly summary for signalapp/Signal-iOS: Delivered a critical bug fix to stabilize the internal Link’n’SYNC flow by extending the timeout from 4 minutes to 60 minutes, addressing premature timeouts during long internal synchronization runs. This change improves the reliability of internal testing and CI throughput with minimal risk and clear business value.
October 2024
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Quality Metrics
Correctness89.0%
Maintainability91.4%
Architecture87.8%
Performance83.6%
AI Usage21.4%
Skills & Technologies
Programming Languages
LocalizationObjective-CSwiftTextXMLplist
Technical Skills
Bug FixBuild ManagementCode LintingConfigurationConfiguration ManagementData IntegrityData SerializationDatabase QueryingDependency InjectionError HandlingFeature Flag ManagementFile HandlingInternationalizationLocalizationLogging
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