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Federico Cappelli

PROFILE

Federico Cappelli

Worked on the duckduckgo/privacy-configuration and duckduckgo/content-scope-scripts repositories, delivering cross-platform feature flag systems, authentication rollouts, and privacy-focused analytics for iOS and macOS. Built platform-specific feature flag overrides and staged authentication releases, using TypeScript, Swift, and JSON configuration to enable safer, incremental rollouts and robust telemetry controls. Developed an attributed metrics system to support user engagement analytics while preserving privacy, and managed schema migrations for new data metrics. Integrated Swift Package Manager for Apple client packaging, refining build paths and artifact delivery. Addressed dependency management, bug fixes, and repository hygiene, ensuring stable, maintainable releases across multiple Apple platforms.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

17Total
Bugs
2
Commits
17
Features
8
Lines of code
1,130
Activity Months7

Work History

January 2026

4 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for duckduckgo/content-scope-scripts: Focused on Apple packaging integration via Swift Package Manager, exposing prebuilt artifacts as SwiftPM resources for Apple clients, and refining build paths to support Apple packaging. The work included a path change (build/apple -> Sources/ContentScopeScripts/dist), lint and gitignore improvements, and collaboration across multiple contributors. The initiative laid groundwork for Apple client packaging, but encountered stability regressions that required a revert and subsequent re-application of fixes to restore a clean, maintainable state. Overall, progressed end-to-end packaging readiness, improved repository hygiene, and set the stage for smoother Apple client delivery.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for developer work in duckduckgo/privacy-configuration. Focused on delivering a new attribution-based analytics capability for macOS and iOS, along with targeted code quality improvements to stabilize release readiness.

November 2025

2 Commits • 1 Features

Nov 1, 2025

Delivered the Attributed Metrics System in the duckduckgo/privacy-configuration repo, replacing the legacy behavior metrics and enabling attribution across user interactions and metrics tracking. Migrated the schema to support attributed metrics, added a weekly average searches metric, and aligned the pixel prefix naming to attributed_metric. Included schema updates and lint fixes, and introduced attributed_metric_average_searches_past_week to support cross-week attribution. Work spans two commits and involved collaboration with a co-author (Jan Louw).

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025: Delivered a privacy-conscious Behavior Metrics Collection Toggle for iOS/macOS in duckduckgo/privacy-configuration, establishing platform-wide flag control and a placeholder for future exception handling to guide selective telemetry. No major bug fixes this month; all work focused on feature flag architecture and groundwork for telemetry controls.

July 2025

4 Commits • 2 Features

Jul 1, 2025

July 2025 productivity focused on strengthening cross-platform subscription integrity, iOS authv2 robustness, and dependency hygiene. Implemented AuthV2 Subscriptions and Entitlements Notification Overhaul with a new entitlement notification payload structure and bridging logic to map V1 entitlements to V2, ensuring consistent subscription status handling across platforms. Fixed iOS Authentication v2 bugs, improved login/logout handling, entitlement change notifications, and enhanced subscription cache management. Upgraded key Swift Package Manager dependencies (content-scope-scripts, duckduckgo-autofill, sync_crypto, swift-asn1) for stability and security, reducing risk and improving build reproducibility.

May 2025

3 Commits • 1 Features

May 1, 2025

May 2025: Delivered and stabilized Privacy Pro Authentication V2 in the duckduckgo/privacy-configuration repository, enabling staged rollouts on iOS and macOS and laying groundwork for a broader release. Implemented feature flag rollout, telemetry collection, and rollback readiness to improve security and user privacy while reducing release risk.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 summary for duckduckgo/privacy-configuration. Key deliverable: Platform-specific Feature Flag Overrides for iOS and macOS enabling conditional feature rollout and testing across Apple platforms. This feature reduces release risk by allowing staged exposure and platform parity. No major bugs fixed this month. Overall impact: established a scalable, cross-platform feature flag mechanism that supports safer experiments and faster iterations. Demonstrated technologies/skills: cross-platform architecture, per-platform configuration, Git-based collaboration, and validation across iOS/macOS.

Activity

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Quality Metrics

Correctness84.2%
Maintainability84.2%
Architecture83.0%
Performance80.0%
AI Usage24.8%

Skills & Technologies

Programming Languages

JSONJavaScriptSwiftTypeScriptUnknown

Technical Skills

API IntegrationAuthenticationConfiguration ManagementDependency ManagementFeature Flag ManagementFeature FlaggingFull Stack DevelopmentJSON configurationJavaScriptJavaScript DevelopmentMobile DevelopmentNode.jsNotification HandlingSubscription ManagementSwift

Repositories Contributed To

3 repos

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

duckduckgo/privacy-configuration

Apr 2025 Dec 2025
5 Months active

Languages Used

SwiftUnknownJSONTypeScript

Technical Skills

Feature Flag ManagementMobile DevelopmentiOS DevelopmentmacOS DevelopmentConfiguration ManagementFeature Flagging

duckduckgo/apple-browsers

Jul 2025 Jul 2025
1 Month active

Languages Used

Swift

Technical Skills

API IntegrationAuthenticationDependency ManagementNotification HandlingSubscription ManagementSwift Package Manager

duckduckgo/content-scope-scripts

Jan 2026 Jan 2026
1 Month active

Languages Used

JavaScriptSwift

Technical Skills

JavaScriptJavaScript DevelopmentNode.jsSwiftSwift Package Managerbuild systems