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John Linhart

PROFILE

John Linhart

Over ten months, Jan built and maintained core features for the mautic/mautic repository, focusing on backend and full stack development with PHP, Symfony, and JavaScript. He delivered new entities and integrations, such as project-based organization and enhanced region filtering, while modernizing the codebase through dependency upgrades, code cleanup, and static analysis. Jan addressed complex issues like date range consistency between API and UI, improved campaign and email workflows, and removed legacy components to streamline deployment. His work demonstrated depth in database design, automated testing, and code quality, resulting in a more reliable, maintainable, and upgrade-ready marketing automation platform.

Overall Statistics

Feature vs Bugs

53%Features

Repository Contributions

88Total
Bugs
17
Commits
88
Features
19
Lines of code
101,179
Activity Months10

Work History

October 2025

1 Commits

Oct 1, 2025

Oct 2025 — mautic/mautic monthly summary focused on stabilizing date range handling across API and UI. Delivered a critical bug fix introducing setTimeIfMissing to ensure time components exist in date strings, aligning dateFrom/dateTo defaults with full-day UI ranges while preserving times for API calls. Added comprehensive unit and functional tests. PR 2774 (MAUT-13052) merged with commit 9b0160a5aee7ca6807b30820fc7f78aa0814cb81. No new features shipped this month; primary business value comes from improved data accuracy, reliability, and user experience under date-based queries.

August 2025

2 Commits • 2 Features

Aug 1, 2025

August 2025 performance snapshot for mautic/mautic: Delivered two major enhancements that improve entity organization and audience targeting, along with targeted fixes that stabilize lead segmentation workflows.

May 2025

3 Commits • 2 Features

May 1, 2025

Concise May 2025 monthly summary focused on business value and technical achievements for mautic/mautic. Highlights delivered features that improve organization and dashboard performance, and demonstrates end-to-end implementation skills across bundles, entities, controllers, and migrations.

April 2025

14 Commits • 6 Features

Apr 1, 2025

April 2025 monthly summary for mautic/mautic: Delivered core dependency upgrades and ecosystem modernization, removed legacy components (API rate limiter and RabbitMQ), documented 7.0 upgrade path, reintroduced doctrine_result_cache with in-memory adapter, migrated validation metadata to PHP attributes, aligned typing for Symfony 7 and set the default authentication manager. These changes reduce maintenance burden, improve security, and accelerate upgrade readiness while simplifying deployment.

March 2025

10 Commits

Mar 1, 2025

2025-03 monthly summary for mautic/mautic: Reliability and quality improvements across forms, defaults, and the test suite. Key features/bugs delivered include: 1) Company Information Form Update Reliability — refactored form field mapping, ensured correct company/contact data updates, and added functional tests; 2) Campaign-based flag default restoration — reverted to default true and aligned API test payload; 3) Test Suite Stability and Static Analysis Fixes — addressed PHPStan warnings, Rector/PHPUnit upgrades, and test mock/callback improvements. Overall impact: improved data integrity, safer deployments, and a more maintainable codebase. Technologies/skills demonstrated: PHP, PHPStan, Rector, PHPUnit, Composer tools, functional testing, and code quality automation.

February 2025

3 Commits • 1 Features

Feb 1, 2025

February 2025 (2025-02) — mautic/mautic: Focused on frontend simplification and upgrade-readiness. Delivered UI library dependency cleanup by removing unused CodeMirror, Froala, and ModernizrJS, eliminated legacy builder references, and documented upgrade steps in UPGRADE-6.0.md. No major bugs fixed this month; the work reduces risk, minimizes maintenance surface, and smooths the upgrade path. Demonstrated competencies in frontend asset management, dependency cleanup, and documentation for operational continuity.

January 2025

16 Commits • 2 Features

Jan 1, 2025

January 2025 performance highlights for mautic/mautic. Delivered frontend cleanup, UX refinements, and stability improvements that reduce technical debt, improve user experience, and strengthen platform reliability. Focused work reduced legacy dependencies, modernized Twig rendering, and stabilized test coverage, while ensuring backend correctness for email handling.

December 2024

20 Commits • 3 Features

Dec 1, 2024

December 2024 monthly highlights for mautic/mautic focused on stability, code quality, and business value. Delivered targeted features and critical fixes to improve campaign reliability, user experience, and maintainability. Key outcomes include removal of the deprecated Gated Video feature, stronger publish permission controls, and improved robustness in campaign execution and redirect handling. Completed a broad code quality uplift with PHPStan/Rector v2, type-safety refactors, and updated tests across bundles, reducing technical debt and elevating developer velocity.

November 2024

17 Commits • 2 Features

Nov 1, 2024

November 2024 monthly summary for mautic/mautic. Focused on delivering user-facing features, stabilizing UI behavior, and strengthening test/infrastructure to support ongoing platform upgrades. Key outcomes include enhanced email customization via unsubscribe/resubscribe tokens, improved filter UX with Copy Filter Group, robust 404 handling, a reliable Is campaign based? toggle, and foundational platform upgrades with Symfony/Twig compatibility and expanded test coverage.

October 2024

2 Commits • 1 Features

Oct 1, 2024

October 2024 performance summary for mautic/mautic focusing on delivering measurable business value and maintaining a robust test suite. Key features delivered this month include a new resubscribe_url token integrated into the email builder, backend email processing, and associated tests, enabling users to directly manage subscription preferences. Additionally, DateHelper test stability was improved to ensure reliable date-related functionality. These efforts enhance user control over subscriptions and increase CI reliability for email-related features.

Activity

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Quality Metrics

Correctness88.8%
Maintainability89.2%
Architecture83.2%
Performance82.0%
AI Usage20.2%

Skills & Technologies

Programming Languages

CSSHTMLINIJSONJavaScriptLESSLessMarkdownPHPTwig

Technical Skills

API DevelopmentAccessibilityAutomated TestingBackend DevelopmentCI/CDCSSCachingCampaign ManagementCode CleanupCode FormattingCode QualityCode RefactoringCode StyleCommand Line Interface (CLI)Composer

Repositories Contributed To

1 repo

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

mautic/mautic

Oct 2024 Oct 2025
10 Months active

Languages Used

INIJavaScriptPHPCSSTwigYAMLHTMLLESS

Technical Skills

Backend DevelopmentEmail MarketingFrontend DevelopmentFull Stack DevelopmentPHPUnitRefactoring

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