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Stefan Guder

PROFILE

Stefan Guder

Sebastian Guder developed and maintained core features and test automation infrastructure for Shopware, focusing on the shopware/acceptance-test-suite and shopware/shopware repositories. Over ten months, he delivered bulk product editing, payment method management, and visual regression testing, using TypeScript, JavaScript, and Playwright to enhance both backend and frontend workflows. His work included refactoring the Page Object Model, optimizing test data cleanup, and improving accessibility and localization. By upgrading the acceptance test suite and introducing robust end-to-end and UI automation, Sebastian improved release reliability, reduced test flakiness, and streamlined developer onboarding, demonstrating depth in full stack development and quality assurance practices.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

34Total
Bugs
3
Commits
34
Features
21
Lines of code
7,161
Activity Months10

Work History

January 2026

5 Commits • 3 Features

Jan 1, 2026

January 2026 monthly summary: Delivered accessibility and performance enhancements across the acceptance test suite and upgraded testing tooling to improve coverage, reliability, and compatibility. Key outcomes include improved keyboard accessibility for form controls, a refactor to stabilize radio button interactions, performance optimizations eliminating unnecessary scrolling, and ATS upgrades to 12.4.1 and 12.4.2 to align with latest features and fixes. These efforts reduce test run times, decrease flaky behavior, and strengthen regression coverage for Shopware front-end and testing workflows.

December 2025

4 Commits • 2 Features

Dec 1, 2025

December 2025 monthly summary focusing on core results across Shopware repos. Delivered UX improvements, localization accuracy fixes, and test suite upgrades that together reduce risk and accelerate delivery. Key features delivered: - Off-canvas cart dismissal enhancement (shopware/acceptance-test-suite): Implemented the ability to close the off-canvas cart, with updates to the testing suite and ProductDetail page object structure to support verification. Commits: 3d6e912cb175326d35e6fba5cfb8cd5d42d2131d. - Acceptance Test Suite upgrade to 12.2.3 (shopware/shopware): Upgraded the Acceptance Test Suite to version 12.2.3 to ensure compatibility with latest features and fixes. Commit: 45247e32e14f32227d74f82709eee7023e06fa2b. Major bugs fixed: - Address data typo corrections across locales (shopware/acceptance-test-suite): Fixed typos in default address data to ensure localization accuracy and consistency across locales, including correcting German locale defaults. Commits: 435a1056a0745cd7f738e12d916b3329393798e2; d2b8d8305fafe278a89184ca74b5c4a1fbaed8d8. Overall impact and accomplishments: - Improved localization accuracy and consistency across locales, reducing data-related errors in production and test environments. - Enhanced user experience with a dismissible off-canvas cart, leading to quicker interactions and fewer steps to proceed to checkout. - Strengthened release readiness by keeping test tooling up-to-date with the latest capabilities, mitigating compatibility risk for upcoming features. Technologies/skills demonstrated: - Test automation and QA: ATS upgrades, page object model enhancements, and test suite maintenance. - Localization QA: validating and correcting locale-specific data across multiple locales, including German defaults. - Release engineering: updating test tooling to align with latest framework versions and features.

November 2025

1 Commits • 1 Features

Nov 1, 2025

Month: 2025-11 — Key feature delivered: TestDataService Cleanup Optimization in shopware/acceptance-test-suite. This work restructures priority delete handling and system configuration restoration to ensure cleanup runs only when necessary, boosting efficiency of test data management. No major bugs fixed in this repository this month. Impact: reduced maintenance overhead for test data, more reliable test environments, and faster CI/test cycles, contributing to overall product quality and developer productivity. Technologies/skills demonstrated: PHP/Shopware test tooling, code refactoring for performance, priority-based operation optimization, system configuration restoration, and strong Git change-tracking.

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary focusing on the acceptance-test-suite repository. Delivered a targeted feature to improve test configurability and reliability by exposing cleanup configuration via a public getter in TestDataService and updating the setter to modify internal state. This enables external tests and CI tooling to deterministically control test data cleanup, reducing flaky tests and improving overall test stability. The work is captured under a focused commit in the repository.

September 2025

4 Commits • 3 Features

Sep 1, 2025

September 2025 monthly summary: Delivered foundational enhancements to visual regression testing across core Shopware admin and acceptance-test-suite repos. Centralized visual test utilities in the Administration panel, extended coverage for promotion product rules, and added flexible masking capabilities to the visual regression tests. These changes reduce test flakiness, improve maintainability, and enable more reliable UI verification for complex pricing and discounts, accelerating feedback loops and lowering risk of UI regressions in production.

August 2025

3 Commits • 3 Features

Aug 1, 2025

August 2025 monthly summary focused on expanding visual regression coverage for Shopware features and strengthening test infrastructure across two repositories. Key enhancements were delivered in the acceptance test suite and core Shopware UX testing, enabling earlier detection of UI regressions and more consistent releases.

May 2025

2 Commits • 1 Features

May 1, 2025

May 2025 monthly summary: Delivered targeted documentation improvements for the shopware/acceptance-test-suite, strengthening developer onboarding and maintenance of the test suite. Key changes include clear guidance on fixtures and page objects, updated actor pattern examples, removal of deprecated sections, and new sections for handling sensitive data and debugging API calls. These changes reduce onboarding time, improve test reliability, and establish a solid baseline for future automation work. Commits underpinning this work include eb5c5c5531e6fe9430bdc4eceea02f8da0aaf541 (Add new fixtures documentation) and 285d4d82935e7ca5ac9cdd86d7471c8c15266783 (Best practices documentation).

April 2025

2 Commits • 2 Features

Apr 1, 2025

Monthly work summary for 2025-04 focused on strengthening test automation infrastructure and validating storefront UX during critical flows. Delivered a new Page Object Model for Header and Footer to centralize element locators and interactions, and added an acceptance test to verify header/footer behavior during checkout. These changes improve test maintainability, reduce flaky tests, and provide more reliable regression coverage for storefront UI across checkout paths.

February 2025

8 Commits • 3 Features

Feb 1, 2025

February 2025 performance summary: Delivered critical order flexibility enhancements and strengthened test stability across two Shopware repositories. Implemented payment method management for existing orders with backend support to fetch payment options and assign methods to sales channels, enabling changes to payment methods without order recreation. Expanded end-to-end acceptance tests for storefront order actions (repeat order and change payment method) and updated tests to be aware of the 6.7 feature flag, ensuring reliable behavior across versions. Reverted a suite of UI features to stabilize the UI layer and test data (ContactForm, reCAPTCHA, ProductCrossSelling). Overall impact: improved checkout adaptability for customers, more robust QA coverage, and better alignment with version-specific behavior. Technologies/skills: backend service changes, test automation, version-flag logic, and cross-repo coordination.

December 2024

4 Commits • 2 Features

Dec 1, 2024

December 2024: Delivered bulk product editing capabilities and strengthened test automation across Shopware repositories, driving merchant efficiency and more reliable QA. Features delivered include the Product Bulk Edit in the Administration Panel (bulk select/edit with updates to price, stock, and tags). Acceptance tests were added for multi-product bulk edits (Overwrite, Clear, Add) and reliability fixes were applied to test automation (locator/role-based selectors). The effort improved test stability and cross-repo QA alignment, enabling faster, more confident releases. Technologies demonstrated include automated acceptance testing, Page Object Model improvements, and role-based selectors.

Activity

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Quality Metrics

Correctness94.4%
Maintainability94.2%
Architecture92.0%
Performance92.4%
AI Usage21.2%

Skills & Technologies

Programming Languages

JSONJavaScriptTypeScript

Technical Skills

API IntegrationAPI TestingAPI integrationAcceptance TestingBackend DevelopmentBulk OperationsDocumentationE-commerceE-commerce Platform TestingEnd-to-End TestingFront End DevelopmentFront-end DevelopmentFull stack developmentJSONJavaScript

Repositories Contributed To

2 repos

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

shopware/acceptance-test-suite

Dec 2024 Jan 2026
10 Months active

Languages Used

TypeScriptJavaScriptJSON

Technical Skills

End-to-End TestingFront End DevelopmentPage Object ModelPlaywrightTest AutomationUI Automation

shopware/shopware

Dec 2024 Jan 2026
7 Months active

Languages Used

TypeScriptJavaScriptJSON

Technical Skills

Acceptance TestingBulk OperationsE-commerce Platform TestingProduct ManagementE-commerceFront End Development