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Mark McDowall

PROFILE

Mark Mcdowall

Mark McDowall engineered robust automation, API, and UI features for the Sonarr/Sonarr and Radarr/Radarr repositories, focusing on reliability, maintainability, and user experience. He migrated core modules and settings to TypeScript, modernized state management with React, Redux, and Zustand, and expanded V5 API endpoints to streamline data access and integration. Mark improved parsing accuracy for multilingual media, enhanced authentication security, and refactored queue and import workflows for better performance. Using C#, TypeScript, and React Query, he delivered well-tested, traceable solutions that reduced manual intervention, improved data integrity, and accelerated development cycles, demonstrating depth in backend and frontend engineering.

Overall Statistics

Feature vs Bugs

68%Features

Repository Contributions

432Total
Bugs
84
Commits
432
Features
178
Lines of code
202,786
Activity Months22

Work History

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for Sonarr/Sonarr: Delivered Settings Infrastructure Modernization for the Media Management subsystem, refactoring to use React-Query for data fetching and state management, and removing naming-related state from SettingsAppState to simplify the naming settings scope. The changes reduced boilerplate, improved performance, and laid groundwork for smoother future feature work. No major bugs fixed during this period; focus was on architecture, performance improvements, and maintainability. Commits reflect incremental, well-documented changes and clear traceability.

January 2026

22 Commits • 8 Features

Jan 1, 2026

January 2026 delivered substantial platform improvements for Sonarr/Sonarr across API, UI, and data-processing layers, with a focus on business value, reliability, and developer productivity. The month emphasized completing the v5 API surface, tightening data access patterns, and strengthening release parsing and UI accessibility to improve automation, discovery, and user experience. Key work spans backend API enhancements, data-fetching reliability, and user-facing UI polish, enabling faster data flows, more controllable automation, and fewer user-visible errors.

December 2025

47 Commits • 21 Features

Dec 1, 2025

December 2025 was focused on modernizing data access, expanding V5 endpoint coverage, and improving stability and UX. Delivered extensive V5 endpoints and migrated critical data fetch paths to React-Query, modernized the app state with Zustand, and implemented user-centric enhancements across manual imports, filters, and UI settings. These changes pave the way for faster, more reliable feature delivery and better maintainability.

November 2025

40 Commits • 23 Features

Nov 1, 2025

November 2025 performance summary: Focused on API modernization and UI responsiveness across Sonarr and Radarr, delivering a broad V5 endpoints suite, IPv6 network support, reliability fixes, and data-fetching improvements that boost business value and developer velocity. Key features delivered: - V5 Endpoints Suite across tasks, backups, calendar, parse, and more, with React-Query UI integration for faster, more reliable front-end data flows and easier third-party integrations. - Expanded v5 endpoints to include tags, releases, history, episode files, root folders, and comprehensive filesystem endpoints, enabling richer tooling and automation. - Private IPv6 networks support added to Sonarr and Radarr to improve networking compatibility in modern deployments. Major bugs fixed: - Fix V5 Task endpoint and adapt UI interactions for tasks using React-Query. - Fix episode status display on the Wanted view and ensure queue data is consistently populated. - Stabilize tests impacted by credentials changes and other flakiness (e.g., qBittorrent testing). Overall impact and accomplishments: - Substantial modernization of the API surface and front-end data access patterns, delivering faster UI experience, more robust integrations, and a cleaner path for future features. - Improved reliability and user satisfaction through targeted bug fixes, better import/queue workflows, and reduced noise from external sources. Technologies/skills demonstrated: - React-Query-driven UI and data fetching across multiple modules (tasks, backups, calendar, parse, episodes, tags, filesystem). - API design and versioning with V5 endpoints enabling scalable integrations. - Networking safety and maintainability improvements (private IPv6 networks, Cross-Origin-Opener-Policy considerations). - QA and test stability improvements, with focus on end-to-end reliability."

October 2025

6 Commits • 4 Features

Oct 1, 2025

October 2025: Implemented Version 5 enhancements across History and Log File APIs in Sonarr/Sonarr, delivering richer data access, improved UI responsiveness, and on-demand system updates fetching. Added a responsive sidebar control to enhance navigation on small screens. These changes reduce data fetch latency, improve reliability, and enable more precise historical analysis and faster log data retrieval.

September 2025

10 Commits • 5 Features

Sep 1, 2025

September 2025 — Sonarr/Sonarr monthly summary highlighting business value and technical achievements. Focus areas include multilingual metadata handling, language parsing accuracy, security/configuration improvements, UI polish, and enhanced blocklist management. Key deliverables span across indexing/parsing enhancements, new language support, and deployment flexibility, with attention to end-user impact and reliability.

August 2025

9 Commits • 6 Features

Aug 1, 2025

August 2025 summary: Delivered cross-repo features and quality improvements across Sonarr and Radarr to strengthen automation reliability, UX, and maintainability. Key features include multilingual and bracket-aware release title parsing, and UI/UX enhancements for import status visibility. Major infrastructure improvements include upgrading the SixLabors.ImageSharp library for bug fixes, performance, and security, and reducing log noise in authentication events to improve incident response and operational efficiency. Together, these changes increase data accuracy, reduce manual intervention, and accelerate troubleshooting, delivering measurable business value.

July 2025

2 Commits • 1 Features

Jul 1, 2025

July 2025 performance summary for Sonarr/Sonarr focusing on parsing accuracy and metadata extraction. Delivered two major changes: (1) Japanese '(JA)' language notation support with updated tests and regex; (2) ReleaseGroupParser to correctly classify release groups and fix misclassifications like TaoE and QxR. The work improves automated metadata extraction, searchability, and library organization, with regression safety provided by tests.

June 2025

13 Commits • 6 Features

Jun 1, 2025

June 2025 monthly summary focusing on key accomplishments, business value, and technical achievements across Sonarr/Sonarr and Radarr/Radarr. Highlights include UX improvements, security hardening, reliability enhancements, stability and dependency updates, improved episode parsing, and compatibility upgrades.

May 2025

6 Commits • 3 Features

May 1, 2025

May 2025 highlights across Sonarr and Radarr: Delivered UI and reliability improvements that boost performance, data accuracy, and user clarity. Features include a React Query-based queue UI overhaul with episode details, and consistent root-folder removal wording. Major reliability fixes cover series and movie metadata refresh tasks, plus Trakt Import List authentication stability. These changes reduce failure modes, improve end-user experience, and demonstrate solid React patterns, error handling, and cross-repo collaboration.

April 2025

13 Commits • 5 Features

Apr 1, 2025

April 2025 performance summary: Across Sonarr and Radarr, delivered significant improvements in data integrity, API contract stability, scalability of backup operations, queue robustness, and UX/messaging reliability. Key outcomes include automated orphaned file cleanup, consistent WikiUrl handling across APIs, support for larger backups, a modernized queue API with backward compatibility, and responsive UI/notification improvements that reduce user friction and improve error visibility. These changes reduce data inconsistencies, increase reliability of imports and restores, enable larger data recovery operations, and streamline developer experience through clearer API contracts and robust messaging.

March 2025

43 Commits • 15 Features

Mar 1, 2025

March 2025: Delivered a focused set of UI improvements, reliability enhancements, and tooling upgrades across Radarr and Sonarr, driving a more intuitive user experience, richer metadata workflows, and greater stability in automated processes. Emphasis on business value included improved UI consistency for tablet/mobile, standardized download cleanup, robust metadata generation, and API/systems stability to reduce support overhead and accelerate future work.

February 2025

19 Commits • 11 Features

Feb 1, 2025

February 2025 monthly summary for Sonarr and Radarr focusing on security improvements, data quality, user experience enhancements, and release engineering that collectively improve security posture, reliability, and business value. Delivered across two repositories with measurable impact on end-user experience and operations.

January 2025

55 Commits • 14 Features

Jan 1, 2025

January 2025 was focused on strengthening maintainability, API stability, and user experience across Sonarr/Sonarr and Radarr/Radarr through extensive TypeScript migrations, UI/component refactors, and performance optimizations. Key work included migrating core frontend modules and settings components to TypeScript for safer, clearer code; migrating SignalR usage to TS; introducing the v5 API surface with accompanying docs and build fixes; release parsing enhancements; and UI/stability improvements in dropdowns and import/list flows. Release engineering hygiene included version bumps and lockfile cleanup to streamline CI. These efforts reduce runtime errors, accelerate development, and deliver clearer contracts for contributors while improving end-user reliability and build performance.

December 2024

70 Commits • 13 Features

Dec 1, 2024

December 2024 monthly summary for Radarr and Sonarr. Focused on modernizing the codebase with TypeScript migration, tooling upgrades, and reliability/privacy improvements, enabling faster feature delivery and more predictable releases. Delivered extensive TypeScript conversions for core data models and UI components, upgraded tooling (TypeScript/core-js, Babel, Font Awesome, ESLint), and implemented robust import/processing safeguards. Also introduced default-disablement of Kometa metadata file creation to reduce noise and improve configurability.

November 2024

50 Commits • 23 Features

Nov 1, 2024

November 2024 performance summary for Sonarr/Sonarr and Radarr/Radarr focused on reliability, data integrity, and user experience improvements across import flows, queue management, and frontend. Delivered a cohesive set of features and fixes that reduce manual intervention, strengthen data consistency, and modernize the UI while improving cross-instance behavior and build/runtime resilience. Key features delivered: - Import pipeline reliability and handling (Sonarr): consolidated improvements to import workflow, including rejecting files with no audio tracks, skipping items that didn’t import during manual imports, and option to treat non-media extensions as failed. (Commits: 978349e24135572889095c743d0e7fac734ba7e0; 5bc943583c70e197b9666aae2f1978e52045cdb2; 776143cc813ec1b5fa31fbf8667c3ab174b71f5c) - Queue management and filtering enhancements (Radarr and Sonarr): added status-based filtering and multiple-qualities support with associated tests and fixes. (Commits: fb540040ef66e90c55b82539b85df378d6c76bd3; b8af3af9f16db96337832c2989f4e7ff3dc2ed30; 114d260f42612117dad4f8219d1dac6b56136e14) - Release/name parsing improvements: replace ‘Ben the Man’ with ‘Ben the Men’ and enable original extraction from release names, improving metadata accuracy and consistency. (Commits: 202190d032257b3cd19e42606385db7052b2aae4; 88f4016fe0ed768f4206d04479156c45517f15b7) - Frontend modernization and UI enhancements: React 18 upgrade, React Query integration, and UI components improvements for multi-instance scenarios, root folder editing, and improved tag handling. (Commits: b91517afd55b91a62dffc7e4a79e1c7e76e4504c; 7b9562bb38b7f642d4a5252e2a8bba1a2543c624; efd2b80e1043f13b7d58056aa7e28f988646cffd) - Health checks and reliability improvements: resilience to network outages and CI stability enhancements to reduce flaky tests. (Commits: dba3a8243988d3e9870b841696303191e1703a0d; f23c2dbaba100bf05de47db667b76e94e84ef3a9) - Data compatibility and tooling enhancements: SABnzbd history retention support, non-standard PostgreSQL version parsing improvements, and UI settings isolation for multi-instance environments. (Commits: e361f18837d98c089f7dc9c0190221ca8e2cf225; 828b994ef4fa457055983e9db67b42e584712206; 1cf3ef5dff5786ea024d2de8873f0849fc85dbd5) Major bugs fixed: - Library Import UI interactions: closing on click outside select input and styling improvements. - Queue filtering: fixed filtering by multiple qualities and ensured robust status filtering in queue. - Path and text handling: Unicode path normalization, non-media extension handling, and preventing truncation of long text in UI. - Data and metadata integrity: fix for metadata duplicates with Kometa and Kodi; episode monitoring status propagation; fixes for .plexmatch episodes on separate lines. - Reliability: health check resilience to network errors; queue loading errors; Add/Edit implementation name replacement bugs; retry improvements for tests/CI. Overall impact and accomplishments: - Significantly improved reliability and automation in import and queue workflows, reducing manual intervention and data quality issues. - Modernized the frontend stack and improved cross-instance configuration, resulting in faster, more predictable user experiences. - Strengthened system resiliency against network outages and CI fragility, enabling safer deployments and more stable operations. - Enabled better data compatibility with evolving tools (SABnzbd) and databases (PostgreSQL), facilitating smoother maintenance and upgrades. Technologies and skills demonstrated: - Frontend modernization: React 18, React Query, TS migration, and UI component design for multi-instance setups. - TypeScript conversion and build targeting: TS-based components, Webpack web target. - Data parsing and normalization: Unicode path comparisons and release/name extraction logic. - Robust backend validation: import validation, queue filtering logic, and error handling across services. - CI reliability and test stability: DebouncerFixture retries and CI stability improvements.

October 2024

19 Commits • 14 Features

Oct 1, 2024

October 2024 Monthly Summary for Sonarr/Sonarr and Radarr/Radarr Overview: A productive month delivering a broad set of features across integrations, UI improvements, and code quality, while addressing key reliability issues in history displays and webhook data. The work emphasizes business value through improved automation, branding consistency, and a faster development cycle. Key features delivered - Sonarr/Sonarr - Integrations: Plex Metadata and Webhook Payload Enhancements — adds episode mappings to Plex .plexmatch metadata and includes source path in webhook payloads for downloaded episodes. Commits: 03b9c957b81f83559d095f5ab915f5d357f3b4a6; 73208e2f60263b1236f094a2bf6c47ebd5a8a271 - Progressive Web App Personalization — dynamically insert instance name into PWA manifest. Commit: 1fcfb88d2aa0126c4b3c878c8e310311ea57d04d - TypeScript Migration and Code Quality — refactor form components to TypeScript and introduce type interfaces for Captcha/OAuth/Provider Options. Commit: 682d2b4e1b8acb74ab6e75b85e2a73aa431b5332 - Version Parsing Improvements — improve quality/version parsing in filenames; add tests for patterns like WEBDL-1080p v2, 480p v2. Commit: e88f25d3bf72fe98a9a2cf7045f60090c6b795bc - Manage Custom Formats UI Enhancements — enable editing of individual custom formats and rename the UI control for clarity. Commits: e006b405323c276eb5b7f2dd97b97c80394a6930; 0f225b05c00add562c9a6aa8cc4cf494e83176c1 - Favorites Management in Manual Import — allow users to mark folders as favorites in manual import. Commit: 3ddc6ac6de5c27a9aab915672321c8818dc5da48 - Development Cache Busting — append current UTC time to cache breaker in development to ensure latest frontend assets. Commit: 020ed32fcfab1c6fbe57af5ea650300272c93fd7 - History Log Clarity — fix history row to display the download client’s specific name when available. Commit: 1df0ba9e5aef2d2745a45c546c869837ac8e68db - Documentation and Release Housekeeping — update README and copyright year, adjust notes; bump version in build workflow for releases. Commits: de69d8ec7ec8f1bcb4d4e5d47959ba01380286d1; 562e0dd7c0a69460e24c3b4f7519b0a432029859 - Radarr/Radarr - PWA Manifest: Instance-Specific Branding — dynamically include the instance name in the PWA manifest via configuration and ManifestMapper. Commit: 10e39641118ea98fefb66d312fc91d5c32d2426d - Manage Custom Formats UI overhaul — UI and modal-based editing for individual custom formats, including an actions column, edit/delete modals, and rename to Manage Formats for consistency. Commits: 1414a09111b7684ba8c90bd645bfe416e080c91c; ca724836ce1355df91cf64063b45043c91788c2c - Favorite folders in Manual Import — add the ability to mark folders as favorites with UI controls. Commit: 3b9bd696fbb1743a57a3d330eb960b82e2d44013 - Frontend cache-busting in development — append UTC time tick to asset URLs to ensure latest assets during active development. Commit: b30efd0c62fc3f12bd3ca6bd5383b5f1cfb4dc63 - Activity history: correct download client name — fix display to prioritize downloadClientName when available, with fallback for backward compatibility. Commit: def6950db4f9262e5e106ebfe3e4f0384fb1efb3 - Webhook import: include SourcePath in payload — enhance webhook import event to include SourcePath; update WebhookMovieFile with SourcePath from DownloadMessage in BuildOnDownloadPayload. Commit: b22a86e1d7059dcafc81bc5d823d186e44bacb5b Major bugs fixed - Radarr: Activity history: correct download client name. Commit: def6950db4f9262e5e106ebfe3e4f0384fb1efb3 - Sonarr: History Log Clarity — fix history row to display the download client name when available. Commit: 1df0ba9e5aef2d2745a45c546c869837ac8e68db Overall impact and accomplishments - Improved automation reliability: webhook payloads now include source paths and history displays accurately reflect the actual download client, reducing manual reconciliation and support effort. - Branding and consistency: instance-specific branding across PWAs ensures correct tenant identity and reduces user confusion in multi-tenant deployments. - Developer experience and maintainability: TypeScript migration and explicit interfaces enhance code correctness, readability, and future agility; frontend cache-busting patterns improve development velocity and asset freshness; release housekeeping aligns documentation with releases for smoother handoffs. - UX enhancements: per-format editing and favorites features simplify configuration, while UI/UX improvements for history and recent locations improve user productivity. Technologies and skills demonstrated - TypeScript migration and type-safety improvements in form components and option interfaces. - PWA manifest customization driven by dynamic instance data and configuration mapping. - Frontend development best practices: cache busting in development, UI/UX refinements, and modal-based editing workflows. - Build and release discipline: version bumps and release notes alignment; documentation housekeeping. - Testing and validation of filename/version parsing patterns to ensure robust asset handling.

July 2024

2 Commits • 1 Features

Jul 1, 2024

Monthly performance summary for 2024-07 focused on delivering a more reliable, engaging media notification experience for Radarr/Radarr and improving cross-server consistency. The work included implementing cross-server grouping of movie updates across Kodi and Emby/Jellyfin with a processing queue to manage notifications, and introducing Telegram metadata links via a new metadata-link class to enhance notification richness and user engagement.

April 2024

1 Commits • 1 Features

Apr 1, 2024

April 2024: Implemented Quality Limits (min, max, and preferred sizes) as part of the Quality Profile management in Sonarr/Sonarr, enabling precise, automated enforcement of media quality constraints. This enhancement improves content curation accuracy, reduces manual tuning, and supports consistent playback quality across destinations. The change is traceable to commit 572bdc979c1717a91e21d1c9a816371428392bfc with message 'New: Quality limits are part of Quality Profile'.

December 2022

1 Commits • 1 Features

Dec 1, 2022

December 2022: Delivered a focused feature to enhance 4K (2160p) detection in video release titles for Radarr/Radarr, strengthening automated metadata tagging and reducing manual interventions. Updated regex to recognize 4K in square brackets and added unit tests to prevent regressions. This work improves content categorization for 2160p releases, enabling more reliable search, filtering, and library curation, and accelerates downstream processing for downloads.

February 2022

1 Commits • 1 Features

Feb 1, 2022

February 2022 — Radarr/Radarr: Implemented centralized Movie Title Normalization to improve sorting and title-based search; updated MovieTitleNormalizer and refactored components to use the new normalization for accurate sorting and enhanced retrieval. This reduces mis-sorting of titles and improves search relevance across the catalog.

October 2020

1 Commits • 1 Features

Oct 1, 2020

Month: 2020-10 – Delivered UI quality improvements for the Radarr/Radarr project by implementing Quality Sliders Rendering Improvements. Upgraded the sliders to use new track and thumb renderers, delivering clearer quality visualization and improved usability for quality selection. The change included syncing React-slider props with upstream (commit 8911cbe872df9425881d86c66d3360eeb95e584c) to maintain compatibility and reduce future maintenance overhead. This work enhances user experience, aligns with upstream libraries, and sets a maintainable foundation for future slider enhancements.

Activity

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Quality Metrics

Correctness91.6%
Maintainability89.8%
Architecture87.0%
Performance84.2%
AI Usage22.4%

Skills & Technologies

Programming Languages

BashBatchC#CSSHTMLJSONJavaScriptMarkdownNUnitSVG

Technical Skills

.NET Unit TestingAPI DevelopmentAPI DocumentationAPI IntegrationAPI SecurityAPI TestingAPI developmentAPI integrationASP.NETASP.NET CoreAsset ManagementAsynchronous OperationsAuthenticationBack-end Development

Repositories Contributed To

2 repos

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

Sonarr/Sonarr

Apr 2024 Feb 2026
18 Months active

Languages Used

JavaScriptTypeScriptC#CSSMarkdownSVGYAMLBash

Technical Skills

ReactReduxUI/UX designfront end developmentAPI DevelopmentAsset Management

Radarr/Radarr

Oct 2020 Nov 2025
15 Months active

Languages Used

CSSJavaScriptC#TypeScriptNUnitYAML

Technical Skills

Reactfront end developmentC#backend developmentunit testingAPI integration