Over 19 months, contributed to the mullvad/mullvadvpn-app repository by building and modernizing the Android VPN client, focusing on UI/UX improvements, modular architecture, and robust networking features. Leveraged Kotlin, Jetpack Compose, and Rust to implement advanced split tunneling, device management, and secure networking, while maintaining reproducible builds through Gradle and lockfile hygiene. Introduced a reusable design system module, enhanced accessibility and localization, and migrated networking layers to Ktor and gRPC for scalability. Addressed stability and security by refining CI/CD workflows, upgrading dependencies, and implementing vulnerability management, resulting in a maintainable, performant, and user-focused Android application.
April 2026 monthly summary for Mullvadvpn app focusing on delivering user-visible features, privacy/security improvements, and solidifying the build and tooling stack. The month combined feature completions with reliability and governance enhancements to support faster delivery and safer contributions.
April 2026 monthly summary for Mullvadvpn app focusing on delivering user-visible features, privacy/security improvements, and solidifying the build and tooling stack. The month combined feature completions with reliability and governance enhancements to support faster delivery and safer contributions.
March 2026 performance summary for mullvadvpn-app: Delivered architectural and messaging enhancements, UX improvements, and code quality initiatives that drive stability, scalability, and release readiness. Key efforts include migrating to the new relay selector service and adding a proto definition to enable updated messaging, substantial UI/UX refinements, and tooling/linting updates to improve code quality and build reliability. Overall, the work strengthens the foundation for future networking features and cross-platform parity while reducing noise and friction in daily development and releases.
March 2026 performance summary for mullvadvpn-app: Delivered architectural and messaging enhancements, UX improvements, and code quality initiatives that drive stability, scalability, and release readiness. Key efforts include migrating to the new relay selector service and adding a proto definition to enable updated messaging, substantial UI/UX refinements, and tooling/linting updates to improve code quality and build reliability. Overall, the work strengthens the foundation for future networking features and cross-platform parity while reducing noise and friction in daily development and releases.
February 2026 (Mullvad Mullvadvpn App) delivered a major UI/system overhaul and modularization that enhances maintainability, security, and developer velocity, while stabilizing the CI/test workflow. Highlights include migrating core UI namespaces to a design-system friendly layout, introducing a dedicated UI icon module, and consolidating UI components under a design system. The work also extends to extensive modularization (DAITA feature module, dedicated networking modules, and separated feature modules for time, voucher, and device management), plus comprehensive build/tooling upgrades and accessibility/security improvements.
February 2026 (Mullvad Mullvadvpn App) delivered a major UI/system overhaul and modularization that enhances maintainability, security, and developer velocity, while stabilizing the CI/test workflow. Highlights include migrating core UI namespaces to a design-system friendly layout, introducing a dedicated UI icon module, and consolidating UI components under a design system. The work also extends to extensive modularization (DAITA feature module, dedicated networking modules, and separated feature modules for time, voucher, and device management), plus comprehensive build/tooling upgrades and accessibility/security improvements.
January 2026 — Mullvad Mullvadvpn-app: focused on build reliability, static analysis stability, and dependency hygiene to enable faster, safer feature delivery. Delivered build tool modernization and broad dependency bumps across the Android app (e.g., Gradle 9.3.0, Compose 1.10.1, grpc 1.78.0, ktor 3.4.0, serializationx 1.10.0), with supporting commits such as bumping rust-android-gradle-plugin and enabling configuration cache. Introduced an explicit Espresso dependency to avoid transitive usage, and updated test and probe tooling (MockK 1.14.9, protobuf 4.33.4, protobuf-gradle-plugin 0.9.6). Strengthened static analysis and stability by updating Detekt baseline and ignoring Detekt on submodules, along with reordering Android dependencies for clarity. Achieved reproducible builds and improved CI reliability through lockfile maintenance and an audit workflow on the build machine, plus metadata updates for fdroid reproducible builds. UI cleanup and lint hygiene were addressed (remove QS_TILE_PREFERENCES from activity; update lint baseline). Overall, these changes reduce build noise and test flakiness, increase release velocity, and improve long-term maintainability of the codebase.
January 2026 — Mullvad Mullvadvpn-app: focused on build reliability, static analysis stability, and dependency hygiene to enable faster, safer feature delivery. Delivered build tool modernization and broad dependency bumps across the Android app (e.g., Gradle 9.3.0, Compose 1.10.1, grpc 1.78.0, ktor 3.4.0, serializationx 1.10.0), with supporting commits such as bumping rust-android-gradle-plugin and enabling configuration cache. Introduced an explicit Espresso dependency to avoid transitive usage, and updated test and probe tooling (MockK 1.14.9, protobuf 4.33.4, protobuf-gradle-plugin 0.9.6). Strengthened static analysis and stability by updating Detekt baseline and ignoring Detekt on submodules, along with reordering Android dependencies for clarity. Achieved reproducible builds and improved CI reliability through lockfile maintenance and an audit workflow on the build machine, plus metadata updates for fdroid reproducible builds. UI cleanup and lint hygiene were addressed (remove QS_TILE_PREFERENCES from activity; update lint baseline). Overall, these changes reduce build noise and test flakiness, increase release velocity, and improve long-term maintainability of the codebase.
December 2025 performance summary for mullvad/mullvadvpn-app across the primary repo. Delivered notable UI polish, CI efficiency improvements, and major build/dependency hygiene while stabilizing the product and enabling faster future iterations.
December 2025 performance summary for mullvad/mullvadvpn-app across the primary repo. Delivered notable UI polish, CI efficiency improvements, and major build/dependency hygiene while stabilizing the product and enabling faster future iterations.
November 2025 monthly summary for mullvadvpn-app. Delivered comprehensive RTL support (foundation, navigation, and UI fixes) enabling proper right-to-left layouts across the app. Implemented HopSelector redesign with full hop display and IP selection container. Achieved build and size optimizations through R8 resource shrinking, and upgraded Gradle/Arrow with lockfile maintenance to improve stability and reduce APK size. Expanded internationalization and debugging capabilities with Arabic/Persian locales and pseudo-locales for testing. Resolved critical UI and reliability issues including RTL rendering fixes, secure-mode state preservation, LWO/QUIC highlight fixes, IPv6 config error handling, and stabilized related tests. These changes drive better accessibility, lower distribution costs, and higher product quality for a broader user base.
November 2025 monthly summary for mullvadvpn-app. Delivered comprehensive RTL support (foundation, navigation, and UI fixes) enabling proper right-to-left layouts across the app. Implemented HopSelector redesign with full hop display and IP selection container. Achieved build and size optimizations through R8 resource shrinking, and upgraded Gradle/Arrow with lockfile maintenance to improve stability and reduce APK size. Expanded internationalization and debugging capabilities with Arabic/Persian locales and pseudo-locales for testing. Resolved critical UI and reliability issues including RTL rendering fixes, secure-mode state preservation, LWO/QUIC highlight fixes, IPv6 config error handling, and stabilized related tests. These changes drive better accessibility, lower distribution costs, and higher product quality for a broader user base.
Oct 2025 – Mullvadvpn-app (mullvad/mullvadvpn-app). Focused on modernization, reliability, and developer productivity. Delivered platform/tooling upgrades, UI data freshness capabilities, and governance improvements to accelerate safe releases and reduce maintenance overhead. Overall, improved build stability, release velocity, and localization readiness while strengthening runtime behavior under load.
Oct 2025 – Mullvadvpn-app (mullvad/mullvadvpn-app). Focused on modernization, reliability, and developer productivity. Delivered platform/tooling upgrades, UI data freshness capabilities, and governance improvements to accelerate safe releases and reduce maintenance overhead. Overall, improved build stability, release velocity, and localization readiness while strengthening runtime behavior under load.
September 2025 focused on improving build reliability, app stability, and developer efficiency through lockfile hygiene, targeted testing, and strategic dependency upgrades, while delivering UX and platform refinements that drive user value. Key features delivered include lockfile maintenance, QUIC connection test, expiry date alignment, better variant filter support, and broad dependency upgrades. Major bugs fixed include fix for location selection, Android CVE handling, screen animation issue from settings, and Android Studio Gradle sync reliability. Overall impact: improved build determinism, increased test coverage, smoother user flows, and a stronger security posture. Technologies demonstrated include Kotlin 2.2.20, AGP 8.13.0, Compose 1.9.2, Material 3 1.4.0, Ktor 3.3.0, gRPC Kotlin 1.5.0, Koin 4.1.1, and Gradle-based Android Studio workflows.
September 2025 focused on improving build reliability, app stability, and developer efficiency through lockfile hygiene, targeted testing, and strategic dependency upgrades, while delivering UX and platform refinements that drive user value. Key features delivered include lockfile maintenance, QUIC connection test, expiry date alignment, better variant filter support, and broad dependency upgrades. Major bugs fixed include fix for location selection, Android CVE handling, screen animation issue from settings, and Android Studio Gradle sync reliability. Overall impact: improved build determinism, increased test coverage, smoother user flows, and a stronger security posture. Technologies demonstrated include Kotlin 2.2.20, AGP 8.13.0, Compose 1.9.2, Material 3 1.4.0, Ktor 3.3.0, gRPC Kotlin 1.5.0, Koin 4.1.1, and Gradle-based Android Studio workflows.
Concise monthly summary for 2025-08 focusing on Mullvad VPN app development. Delivered major UI and stability enhancements with measurable business value: faster UI iteration, improved reliability, and stronger security posture across the Android build. The month centralized four key initiatives: Map component lifecycle improvements with a developer preview to accelerate UI iteration, UI robustness and diagnostics improvements for better reliability and supportability, security vulnerability tracking and build stability maintenance to ensure up-to-date risk posture and reproducible builds, and comprehensive dependency upgrades, tooling, and CI enhancements to improve stability and developer experience.
Concise monthly summary for 2025-08 focusing on Mullvad VPN app development. Delivered major UI and stability enhancements with measurable business value: faster UI iteration, improved reliability, and stronger security posture across the Android build. The month centralized four key initiatives: Map component lifecycle improvements with a developer preview to accelerate UI iteration, UI robustness and diagnostics improvements for better reliability and supportability, security vulnerability tracking and build stability maintenance to ensure up-to-date risk posture and reproducible builds, and comprehensive dependency upgrades, tooling, and CI enhancements to improve stability and developer experience.
July 2025 monthly summary for Mullvad Mullvadvpn-app. Architectural restructuring and build/tooling modernization, expanded test coverage, and release tooling enhancements driven by a modernized Android stack. Result: a more maintainable codebase, faster and more reliable releases, improved test robustness, and a better user experience on the latest Android platforms.
July 2025 monthly summary for Mullvad Mullvadvpn-app. Architectural restructuring and build/tooling modernization, expanded test coverage, and release tooling enhancements driven by a modernized Android stack. Result: a more maintainable codebase, faster and more reliable releases, improved test robustness, and a better user experience on the latest Android platforms.
June 2025 monthly wrap-up for mullvad/mullvadvpn-app: Key features delivered, critical fixes, and impact across Android VPN client. Delivered an Android Design System Module establishing a reusable UI library integrated into the main app and existing UI libraries; updated dependency lockfile to ensure reproducible builds. Fixed an Android-specific file descriptor handling issue for boringtun, correcting the raw FD acquisition to resolve 'bad fd' errors and stabilize network device management. These changes improve UI consistency, build reliability, and runtime stability, enabling faster feature delivery and safer deployments.
June 2025 monthly wrap-up for mullvad/mullvadvpn-app: Key features delivered, critical fixes, and impact across Android VPN client. Delivered an Android Design System Module establishing a reusable UI library integrated into the main app and existing UI libraries; updated dependency lockfile to ensure reproducible builds. Fixed an Android-specific file descriptor handling issue for boringtun, correcting the raw FD acquisition to resolve 'bad fd' errors and stabilize network device management. These changes improve UI consistency, build reliability, and runtime stability, enabling faster feature delivery and safer deployments.
May 2025 performance summary for mullvadvpn-app: Delivered a focused set of dependency and build-system improvements, UX/security refinements, and expanded device/TV UI capabilities, while driving stability and test reliability. The work prioritizes business value through faster, more predictable builds, improved security posture, and a more robust user experience across devices.
May 2025 performance summary for mullvadvpn-app: Delivered a focused set of dependency and build-system improvements, UX/security refinements, and expanded device/TV UI capabilities, while driving stability and test reliability. The work prioritizes business value through faster, more predictable builds, improved security posture, and a more robust user experience across devices.
April 2025 performance summary for Mullvadvpn app. Focused on delivering key features that modernize the Android app, improve startup performance, and strengthen network reliability, while addressing stability issues and technical debt. The month included substantial dependency modernization, network stack improvements, and targeted fixes that collectively boost product stability and developer velocity.
April 2025 performance summary for Mullvadvpn app. Focused on delivering key features that modernize the Android app, improve startup performance, and strengthen network reliability, while addressing stability issues and technical debt. The month included substantial dependency modernization, network stack improvements, and targeted fixes that collectively boost product stability and developer velocity.
March 2025 (2025-03) focused on delivering business value through user-centric features, reliability improvements, and build/maintenance hygiene in mullvadvpn-app. Key work delivered includes AndroidX credentials integration with library upgrades, user-friendly password-manager prompt for account numbers, and connectivity resilience improvements that reduce disruption in challenging network conditions. Significant maintenance and quality improvements were achieved through deduplication of Android string resources, comprehensive dependency upgrades across core libraries, and lockfile maintenance with a verification workflow to ensure reproducible builds. The combined effect improves security, stability, UX, and release confidence while enabling faster iteration for future features.
March 2025 (2025-03) focused on delivering business value through user-centric features, reliability improvements, and build/maintenance hygiene in mullvadvpn-app. Key work delivered includes AndroidX credentials integration with library upgrades, user-friendly password-manager prompt for account numbers, and connectivity resilience improvements that reduce disruption in challenging network conditions. Significant maintenance and quality improvements were achieved through deduplication of Android string resources, comprehensive dependency upgrades across core libraries, and lockfile maintenance with a verification workflow to ensure reproducible builds. The combined effect improves security, stability, UX, and release confidence while enabling faster iteration for future features.
February 2025 (mullvad/mullvadvpn-app) monthly summary focusing on key accomplishments, major bugs fixed, and business impact. Key features delivered: - Dependency Version Updates across project: Bumped destinations to 2.1.0-beta16, Compose to 1.7.8, AGP to 8.8.1, Ktor to 3.1.0, Joda Time to 2.13.1, ktfmt plugin to 0.22.0, gRPC to 1.70.0, and KSP to 2.1.10-1.0.30. This aligns with modern Android SDKs, improves toolchain stability, and the potential for better build performance and new API support. - Baseline and lockfile maintenance: Updated repository baseline and lockfile to reflect the latest project state. - Network state management improvements: Refactored defaultRawNetworkStateFlow and added capability to invalidate NetworkState cache for fresher state and better resilience in changing network conditions. - VPN networking stability and performance: Consolidated VPN networking improvements including reducing open_tun calls, removing cached VpnConfig in TalpidVpnService, fixing gRPC not working with WiFi proxy, and addressing connection loop regression to improve reliability of tunnel establishment. - Code quality and tooling upgrades: Fixed formatting inconsistencies, renamed variables for clarity, and upgraded tooling and dependencies (AGP, activity, datastore, ConstraintLayout, detekt, Gradle wrapper, and lockfile). Major bugs fixed: - Fix incorrectly notifying offline status and wrong offline notification handling. - Remove calls to restart tunnel to avoid unnecessary restarts. - Android route comment inaccuracy corrected. - Fix gRPC not working with WiFi proxy and related connectivity issues. Overall impact and accomplishments: - Delivered a more stable, maintainable, and future-proof codebase with modern dependencies and improved network state handling. - Reduced restart churn and improved VPN stability, contributing to a more reliable user experience in diverse network conditions. - Strengthened build hygiene and developer efficiency through baseline/lockfile maintenance and tooling upgrades. Technologies/skills demonstrated: - Kotlin, Android app architecture, and coroutine-based flows; advanced dependency management; Gradle and AGP tooling; Ktor, gRPC, KSP; code formatting and static analysis tooling; network state caching and cache invalidation patterns; VPN networking stability techniques.
February 2025 (mullvad/mullvadvpn-app) monthly summary focusing on key accomplishments, major bugs fixed, and business impact. Key features delivered: - Dependency Version Updates across project: Bumped destinations to 2.1.0-beta16, Compose to 1.7.8, AGP to 8.8.1, Ktor to 3.1.0, Joda Time to 2.13.1, ktfmt plugin to 0.22.0, gRPC to 1.70.0, and KSP to 2.1.10-1.0.30. This aligns with modern Android SDKs, improves toolchain stability, and the potential for better build performance and new API support. - Baseline and lockfile maintenance: Updated repository baseline and lockfile to reflect the latest project state. - Network state management improvements: Refactored defaultRawNetworkStateFlow and added capability to invalidate NetworkState cache for fresher state and better resilience in changing network conditions. - VPN networking stability and performance: Consolidated VPN networking improvements including reducing open_tun calls, removing cached VpnConfig in TalpidVpnService, fixing gRPC not working with WiFi proxy, and addressing connection loop regression to improve reliability of tunnel establishment. - Code quality and tooling upgrades: Fixed formatting inconsistencies, renamed variables for clarity, and upgraded tooling and dependencies (AGP, activity, datastore, ConstraintLayout, detekt, Gradle wrapper, and lockfile). Major bugs fixed: - Fix incorrectly notifying offline status and wrong offline notification handling. - Remove calls to restart tunnel to avoid unnecessary restarts. - Android route comment inaccuracy corrected. - Fix gRPC not working with WiFi proxy and related connectivity issues. Overall impact and accomplishments: - Delivered a more stable, maintainable, and future-proof codebase with modern dependencies and improved network state handling. - Reduced restart churn and improved VPN stability, contributing to a more reliable user experience in diverse network conditions. - Strengthened build hygiene and developer efficiency through baseline/lockfile maintenance and tooling upgrades. Technologies/skills demonstrated: - Kotlin, Android app architecture, and coroutine-based flows; advanced dependency management; Gradle and AGP tooling; Ktor, gRPC, KSP; code formatting and static analysis tooling; network state caching and cache invalidation patterns; VPN networking stability techniques.
Month: 2025-01 — Mullvad Mullvadvpn-app: Focused on security hardening, reliability, localization, and modernization of the dependency surface. Delivered extended CVE suppression, new localization strings, changelog/typography refinements, robust tunnel lifecycle improvements, and a broad set of dependency upgrades with deterministic lockfiles. These efforts improved security posture, UX stability, and developer throughput, enabling faster, more reliable releases.
Month: 2025-01 — Mullvad Mullvadvpn-app: Focused on security hardening, reliability, localization, and modernization of the dependency surface. Delivered extended CVE suppression, new localization strings, changelog/typography refinements, robust tunnel lifecycle improvements, and a broad set of dependency upgrades with deterministic lockfiles. These efforts improved security posture, UX stability, and developer throughput, enabling faster, more reliable releases.
Month: 2024-12 — Summary of key work and impact for mullvadvpn-app. This month focused on modernization of dependencies and build tooling, UX/UI improvements, maintainability, reliability, and bug fixes that collectively improved release velocity, stability, and user experience.
Month: 2024-12 — Summary of key work and impact for mullvadvpn-app. This month focused on modernization of dependencies and build tooling, UX/UI improvements, maintainability, reliability, and bug fixes that collectively improved release velocity, stability, and user experience.
November 2024 – Mullvadvpn-app: Delivered a mix of user experience enhancements, reliability improvements, and tooling upgrades that collectively increase stability, observability, and business value. Key features include: (1) UI/UX: Predictive back animation improvements to enhance perceived responsiveness, (2) Build/config: runtime build arguments and environment variable overrides to simplify per-environment configuration, (3) VPN Profiles: reliability improvements and legacy support for VPN profiles, (4) Connectivity: refactor of ConnectivityListener with exposed current DNS servers for diagnostics, and (5) Tooling/dependencies: upgrades across Android Gradle Plugin, ktfmt, Kotlin to 2.1.0, Kermit 2.0.5, gRPC 1.68.2 and grpc-protobuf 4.29.0, plus Gradle 8.11.2 and lockfile updates. Major bugs fixed: Auth error parsing fix; clarified message for expired accounts; use-case logic bug fix; removal of default configuration value to reduce ambiguity; code cleanup including formatting and lint improvements. Overall impact and accomplishments: Improved user satisfaction through smoother, more predictable UX and clearer error messaging; stronger build and configuration stability across environments; enhanced maintainability with refactored components and improved diagnostics; reduced support load due to clearer user guidance and more robust error handling; and accelerated development with a strengthened tooling stack. Technologies/skills demonstrated: Kotlin, Android Gradle Plugin upgrades, ktfmt, Kotlin 2.1.0, Kermit, gRPC, grpc-protobuf, Gradle 8.11.2, environment variable overrides, runtime configuration, DNS exposure for diagnostics, localization/file updates, changelog/documentation discipline.
November 2024 – Mullvadvpn-app: Delivered a mix of user experience enhancements, reliability improvements, and tooling upgrades that collectively increase stability, observability, and business value. Key features include: (1) UI/UX: Predictive back animation improvements to enhance perceived responsiveness, (2) Build/config: runtime build arguments and environment variable overrides to simplify per-environment configuration, (3) VPN Profiles: reliability improvements and legacy support for VPN profiles, (4) Connectivity: refactor of ConnectivityListener with exposed current DNS servers for diagnostics, and (5) Tooling/dependencies: upgrades across Android Gradle Plugin, ktfmt, Kotlin to 2.1.0, Kermit 2.0.5, gRPC 1.68.2 and grpc-protobuf 4.29.0, plus Gradle 8.11.2 and lockfile updates. Major bugs fixed: Auth error parsing fix; clarified message for expired accounts; use-case logic bug fix; removal of default configuration value to reduce ambiguity; code cleanup including formatting and lint improvements. Overall impact and accomplishments: Improved user satisfaction through smoother, more predictable UX and clearer error messaging; stronger build and configuration stability across environments; enhanced maintainability with refactored components and improved diagnostics; reduced support load due to clearer user guidance and more robust error handling; and accelerated development with a strengthened tooling stack. Technologies/skills demonstrated: Kotlin, Android Gradle Plugin upgrades, ktfmt, Kotlin 2.1.0, Kermit, gRPC, grpc-protobuf, Gradle 8.11.2, environment variable overrides, runtime configuration, DNS exposure for diagnostics, localization/file updates, changelog/documentation discipline.
October 2024: Delivered key features for the Mullvad VPN app, improved localization, and refreshed the build/tooling, while reinforcing security practices. No major defects fixed this month; focus was on delivering user value and stabilizing the codebase.
October 2024: Delivered key features for the Mullvad VPN app, improved localization, and refreshed the build/tooling, while reinforcing security practices. No major defects fixed this month; focus was on delivering user value and stabilizing the codebase.
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