Selleo/lms-core
Mar 2025 – Sep 2025
6 Months active
Languages Used
JavaScriptSQLTypeScript
Technical Skills
API DevelopmentAuthenticationBackend DevelopmentConfiguration ManagementDatabase OptimizationError Monitoring
MarcinMaciejewski337
PROFILE
Marcinmaciejewski337
Michał Maciejewski contributed to Selleo/lms-core by building and refining features across authentication, localization, and content management. He implemented secure token refresh flows and Sentry-based error monitoring using TypeScript and NestJS, improving system reliability and observability. On the frontend, he enhanced course and quiz user experiences with React, focusing on multilingual support and robust form validation. Michał also delivered backend and database improvements, such as optimized PostgreSQL statistics and schema updates for quiz authoring. His work addressed both user-facing and infrastructure challenges, demonstrating depth in full stack development and a methodical approach to maintainability, data integrity, and developer productivity.
Overall Statistics
Feature vs Bugs
56%Features
Repository Contributions
10Total
Bugs
4
Commits
10
Features
5
Lines of code
5,198
Activity Months6
Your Network
14 people
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: Key outcomes in Selleo/lms-core focused on enhancing quiz authoring UX. Implemented Quiz Question Creation UX Enhancement by increasing option text length, improving error handling, and updating the database schema to support longer text fields. This reduces creation errors, improves validation, and enhances error visibility in the quiz setup flow. The work was driven by commit 76d3ce01664b764b3db5a77d75b681855d380241 and aligns with our roadmap to improve content authoring reliability.
1 Commits • 1 Features
Sep 1, 2025September 2025: Key outcomes in Selleo/lms-core focused on enhancing quiz authoring UX. Implemented Quiz Question Creation UX Enhancement by increasing option text length, improving error handling, and updating the database schema to support longer text fields. This reduces creation errors, improves validation, and enhances error visibility in the quiz setup flow. The work was driven by commit 76d3ce01664b764b3db5a77d75b681855d380241 and aligns with our roadmap to improve content authoring reliability.
September 2025
July 2025
2 Commits
Jul 1, 2025July 2025: Delivered reliability and localization improvements in Selleo/lms-core. Implemented login state management with query cache invalidation to ensure correct post-authentication navigation and a consistent app state. Fixed missing translations for True/False in the student course view to improve localization and user experience. These changes reduce navigation errors, strengthen authentication flow, and extend language coverage in assessments.
July 2025
2 Commits
Jul 1, 2025July 2025: Delivered reliability and localization improvements in Selleo/lms-core. Implemented login state management with query cache invalidation to ensure correct post-authentication navigation and a consistent app state. Fixed missing translations for True/False in the student course view to improve localization and user experience. These changes reduce navigation errors, strengthen authentication flow, and extend language coverage in assessments.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Selleo/lms-core: Delivered Category and Course Deletion Feature across backend (new API endpoints and service methods) and frontend admin UI, with safeguards to prevent deletion when used by other entities. The change includes single and multi-delete capabilities and enhances data integrity and admin efficiency. No major bugs fixed this month; focus on delivering a robust deletion workflow.
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for Selleo/lms-core: Delivered Category and Course Deletion Feature across backend (new API endpoints and service methods) and frontend admin UI, with safeguards to prevent deletion when used by other entities. The change includes single and multi-delete capabilities and enhances data integrity and admin efficiency. No major bugs fixed this month; focus on delivering a robust deletion workflow.
June 2025
May 2025
1 Commits
May 1, 2025May 2025 monthly summary: Focused on stabilizing the lesson editing and navigation experience in Selleo/lms-core by delivering a critical bug fix and targeted reliability improvements. Completed a bug fix for lessons refresh and editor synchronization (LC-620), reinforced editor-to-external changes synchronization, ensured proper form state resets on navigation, and cleaned up legacy code to improve maintainability. These changes improve content authoring reliability, reduce edge-case errors, and bolster developer productivity.
May 2025
1 Commits
May 1, 2025May 2025 monthly summary: Focused on stabilizing the lesson editing and navigation experience in Selleo/lms-core by delivering a critical bug fix and targeted reliability improvements. Completed a bug fix for lessons refresh and editor synchronization (LC-620), reinforced editor-to-external changes synchronization, ensured proper form state resets on navigation, and cleaned up legacy code to improve maintainability. These changes improve content authoring reliability, reduce edge-case errors, and bolster developer productivity.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025: Delivered enhancements to Selleo/lms-core Course and Quiz UX with translation improvements and a submission flow refinement, plus fixed missing course translations. Result is a more accurate multilingual course experience, fewer resubmission errors, and improved reliability of localization coverage across courses.
1 Commits • 1 Features
Apr 1, 2025April 2025: Delivered enhancements to Selleo/lms-core Course and Quiz UX with translation improvements and a submission flow refinement, plus fixed missing course translations. Result is a more accurate multilingual course experience, fewer resubmission errors, and improved reliability of localization coverage across courses.
April 2025
March 2025
4 Commits • 2 Features
Mar 1, 2025March 2025: Delivered observability, security, and robustness enhancements in Selleo/lms-core. Implemented Sentry integration with environment-aware configuration, added a dedicated auth service for token refresh and improved logout flow, and fixed critical PostgreSQL statistics issues to ensure accurate metrics. Result: higher reliability, security, and actionable analytics with improved developer velocity.
March 2025
4 Commits • 2 Features
Mar 1, 2025March 2025: Delivered observability, security, and robustness enhancements in Selleo/lms-core. Implemented Sentry integration with environment-aware configuration, added a dedicated auth service for token refresh and improved logout flow, and fixed critical PostgreSQL statistics issues to ensure accurate metrics. Result: higher reliability, security, and actionable analytics with improved developer velocity.
Activity
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Quality Metrics
Correctness88.0%
Maintainability82.0%
Architecture80.0%
Performance75.0%
AI Usage30.0%
Skills & Technologies
Programming Languages
JavaScriptSQLTypeScript
Technical Skills
API DevelopmentAuthenticationBackend DevelopmentConfiguration ManagementDatabase ManagementDatabase OptimizationDrizzle ORMError MonitoringForm ValidationFront End DevelopmentFront-end DevelopmentFrontend DevelopmentFull Stack DevelopmentNestJSNode.js
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