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Matthias Schmidt

PROFILE

Matthias Schmidt

Matthias contributed to the symfony/symfony and phpstan/phpstan-src repositories by delivering backend features and quality improvements focused on reliability and maintainability. He enhanced Symfony’s serializer and form components, implementing flexible name conversion and automatic enum form type guessing, while also expanding JSON serialization capabilities for nested data structures. His work included integrating JSONPath compliance tests, refining object mapping, and standardizing test assertions to improve code clarity. Using PHP, PHPUnit, and YAML, Matthias addressed code cleanup, documentation, and CI/CD workflows, reducing manual configuration and stabilizing builds. He also improved type safety in PDOStatement APIs, strengthening static analysis and downstream code quality.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

18Total
Bugs
4
Commits
18
Features
6
Lines of code
13,998
Activity Months5

Your Network

750 people

Work History

March 2026

1 Commits • 1 Features

Mar 1, 2026

March 2026 performance summary for phpstan/phpstan-src focused on delivering a targeted type-safety improvement in the PDOStatement API and fixing a related type misalignment to enhance static analysis accuracy and reliability.

August 2025

7 Commits • 1 Features

Aug 1, 2025

August 2025 monthly summary for the symfony/symfony repository focusing on business value, reliability, and maintainability. Delivered features and completed quality improvements that reduce manual work, accelerate onboarding, and stabilize builds.

July 2025

2 Commits • 2 Features

Jul 1, 2025

July 2025 performance summary focused on delivering robust data serialization enhancements and maintaining strong project branding. Key work included implementing JsonStreamer nested collection serialization support, stabilizing nested foreach generation, expanding test coverage with new fixtures for deeply nested structures, and updating sponsorship documentation for Symfony 7.3.

June 2025

7 Commits • 1 Features

Jun 1, 2025

June 2025 - Symfony implementation improvements: Delivered critical test coverage enhancements and stability improvements across core components. Key activities included integrating the official JSONPath compliance tests, fixing object mapping transforms, standardizing test assertions, and targeted code quality cleanup. The work reduces risk, improves compliance, and enhances developer productivity.

April 2024

1 Commits • 1 Features

Apr 1, 2024

Feature delivered: NameConverterInterface Enhancement for the Symfony Serializer; added parameters for class, format, and context to normalize/denormalize, enabling more flexible and accurate custom name conversion (commit b53029a64602d1cde5aa704ae1145532ee875bf3). No major bug fixes recorded for this month in the dataset. Impact: enhances flexibility and consistency of custom name conversion, reduces boilerplate, and improves integration paths for users. Technologies/skills demonstrated: PHP/Symfony, Serializer API design, interface enhancement, Git-based change management, and attention to backward compatibility.

Activity

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Quality Metrics

Correctness99.4%
Maintainability98.8%
Architecture97.8%
Performance96.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

MakefileMarkdownPHPYAMLreStructuredText

Technical Skills

API designBack End DevelopmentBackend DevelopmentCI/CDCode CleanupCode DocumentationCode GenerationCode RefactoringCode StyleData StructuresDocumentationJSON SerializationJsonPathObject-Oriented ProgrammingPHP

Repositories Contributed To

3 repos

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

symfony/symfony

Jun 2025 Aug 2025
3 Months active

Languages Used

MakefilePHPMarkdownYAML

Technical Skills

Back End DevelopmentCI/CDCode DocumentationCode RefactoringJsonPathObject-Oriented Programming

symfony/symfony-docs

Apr 2024 Apr 2024
1 Month active

Languages Used

PHPreStructuredText

Technical Skills

API designSymfony frameworkbackend development

phpstan/phpstan-src

Mar 2026 Mar 2026
1 Month active

Languages Used

PHP

Technical Skills

PHPbackend development