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Justin Manion

PROFILE

Justin Manion

Over 13 months, John Manion delivered user-facing features and stability improvements for the Submitty/Submitty and Submitty/submittyhub.io.git repositories, focusing on notifications, grading workflows, and developer onboarding. He refactored frontend components using Vue.js and TypeScript, standardized CSS with Prettier and Stylelint, and enhanced accessibility and dark mode support. John improved notification systems by introducing dynamic updates and per-item actions, streamlined grading UIs with persistent preferences, and optimized onboarding through updated documentation and policy-driven guidelines. His work demonstrated depth in UI/UX design, backend integration with PHP, and cross-team collaboration, resulting in maintainable, accessible, and scalable codebases across both projects.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

47Total
Bugs
8
Commits
47
Features
24
Lines of code
5,432
Activity Months13

Work History

February 2026

4 Commits • 3 Features

Feb 1, 2026

February 2026: Delivered core improvements to linting tooling, contributor guidelines, and developer onboarding across Submitty projects. Upgraded linting dependencies to modern versions, standardized styling rules, and resolved peer dependency conflicts to stabilize CI. Introduced policy-driven contribution guidelines and PR templates to streamline reviews and ensure project conventions are followed. Overhauled the Getting Started page to accelerate onboarding for new developers, making setup, contributions, and development tools clearer and more accessible. These changes reduce onboarding time, improve code quality, and enhance the contributor experience, enabling faster, safer iterations.

January 2026

6 Commits • 3 Features

Jan 1, 2026

January 2026 monthly summary for Submitty/Submitty focusing on delivering business value through improved notifications, instructor UX, and mobile clarity. Highlights include feature delivery across Notifications, Grading and Student Details UI, and mobile spacing enhancements, along with critical bug fixes for accessibility and dynamic updates. The work reduces instructor time, improves course identification, and enhances accessibility and mobile usability. Key technologies include React UI work, CSS refactoring, cookie-based preferences, and accessibility improvements.

December 2025

3 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for Submitty/Submitty: Delivered a set of front-end and data-layer improvements to the Notifications system and corrected grading integrity logic. Key features delivered include home page notifications enhancements that show total unseen counts across courses when more than 10, plus UI/UX fixes for consistent unseen counts and terminology. Major bug fixes addressed edge cases in the notification UI (0 unseen, dynamic 'No unseen notifications' messaging, and correct array usage) and prevented credit stealing in grading components by normalizing defaults when DOM lookups fail. The changes reduce user confusion, improve visibility of unseen alerts, and ensure grading statistics accurately reflect graders' activity. Technologies demonstrated include Vue frontend work, cross-database aggregation, DOM data handling, refactoring for single-pass unseen-count computation, and strengthened data validation. Overall impact: improved user experience, more trustworthy data, and maintainable code; alignment with Submitty UX conventions and readiness for further e2e testing.

November 2025

4 Commits • 2 Features

Nov 1, 2025

November 2025: Consolidated front-end UX improvements and stability for Submitty/Submitty across three key areas, delivering business-value features, fixing persistent user settings, and enhancing editor usability.

October 2025

4 Commits • 1 Features

Oct 1, 2025

October 2025 performance summary for Submitty/Submitty focusing on user-facing improvements to the notifications system and stabilization of real-time chat flows. Key features delivered include a Notification UI overhaul with per-item mark-seen actions, improved visual hierarchy and interactivity, and a refactor of the notifications container into a dedicated Notification component to boost maintainability. These changes span three related PRs and commits (34652ef3..., cebd6039..., ff5bc3b8...) tied to #12007, #12012, and #12137. In parallel, a Live Chat Clearing bug was fixed, addressing a CI failure by ensuring correct WebSocket message IDs are sent and processed (#12072). Business value: enhanced user engagement through clearer, quicker notification interactions; reduced maintenance cost via modular, component-based code; and improved system reliability for real-time features. Technologies demonstrated include Vue componentization, front-end refactor for maintainability, and WebSocket-based real-time communication, with collaboration across teams.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for Submitty/submittyhub.io.git: Delivered targeted documentation for the Gradeable Autograding Configuration Text Editor within the instructor interface, covering directory/file management, configuration download, and editor customization; the docs enable instructors to perform minor autograding configuration adjustments with confidence. No major bugs fixed this month. Overall impact: improved instructor tooling, faster onboarding, and a clearer maintenance path for autograding configurations. Technologies/skills demonstrated: technical writing, UI/UX understanding, documentation standards alignment, version control (Git), and cross-team collaboration.

August 2025

2 Commits • 2 Features

Aug 1, 2025

Monthly summary for 2025-08: Delivered targeted UI and documentation-focused work for SubmittyHub.io, emphasizing user experience, documentation quality, and architectural clarity. No major bugs were documented for this period; the focus was on feature delivery and maintainability. Key outcomes include a new home page you notifications display and editor improvements with a dark mode toggle for docs, plus refreshed database diagrams and updated documentation links reflecting the current schema as of August 2025. These efforts enhance usability, onboarding, and cross-team reference to the system architecture.

July 2025

2 Commits • 1 Features

Jul 1, 2025

In July 2025, delivered user-centric frontend improvements for the Submitty hub UI and fixed documentation typographical issues. The Dark Mode Feature provides a persistent theme toggle with SCSS-based theming, improving usability and accessibility across sessions. A minor documentation typo in migrations was fixed to ensure accuracy. All work is tracked under Submitty/submittyhub.io.git with clear commits, enabling faster reviews and traceability.

June 2025

10 Commits • 5 Features

Jun 1, 2025

June 2025: Delivered frontend UX improvements, workflow stabilization, and data formatting standardization across Submitty/Submitty. Notable features include Docker UI enhancements with image sorting and error restyling; submission duplication handling improvements to prevent unnecessary submissions; Gradeable admin UI enhancements with sorting for pending gradeables and improved admin view using macros/JS; global date formatting standardized to ISO 8601 (Y-M-D) across the site; and CodeMirror integration for the gradeable editor enabling better indentation, undo/redo, and config editing. Major bug fixes addressed misalignment of Instructor UI notification headers and undefined-course email subject formatting. Overall impact: smoother submission flow, streamlined admin tasks, more reliable analytics, and a productive configuration editing experience.

May 2025

2 Commits

May 1, 2025

May 2025 monthly summary for Submitty/Submitty focusing on UI stability and submission UX. The month centered on fixing critical UI quirks and improving the submission experience, following a Stylelint update. Key fixes include restoring correct email status page button alignment and consolidating submission messaging to a single, consistent popup flow. These changes reduce user confusion, improve reliability during file submissions, and enhance maintainability of the UI codebase.

April 2025

3 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for Submitty/Submitty: Key accomplishment was standardizing CSS formatting with Prettier and aligning with Stylelint, with changes applied across site/public/css. This work preps the project for a Stylelint V16 migration, improving consistency and maintainability. No major bugs fixed this month. Overall impact includes reduced formatting drift, faster code reviews, and a more scalable frontend styling pipeline. Technologies/skills demonstrated include tooling integration (Prettier), linting strategy alignment with Stylelint, CSS refactoring across the public repository, and cross-team collaboration.

March 2025

3 Commits • 2 Features

Mar 1, 2025

March 2025 performance summary for Submitty/Submitty focused on UI polish and CSS quality improvements that deliver measurable business value and long-term maintainability. Key outcomes include improved instructor UI accessibility and theming through dark mode for category customization, and significant CSS cleanup with a maintainability-focused linting rule.

February 2025

3 Commits • 2 Features

Feb 1, 2025

February 2025: Delivered accessibility improvements and maintainability enhancements for Submitty/Submitty. Focused on TA grading UI in dark mode and CSS cleanup to simplify theming while preserving UI integrity. Resulted in improved grader usability in low-light conditions and a cleaner, more maintainable codebase.

Activity

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Quality Metrics

Correctness92.8%
Maintainability89.0%
Architecture83.8%
Performance86.6%
AI Usage22.6%

Skills & Technologies

Programming Languages

CSSHTMLJSONJavaScriptMarkdownPHPRubySCSSTwigTypeScript

Technical Skills

API DevelopmentBack End DevelopmentBackend DevelopmentBug FixCI/CDCSSCSS RefactoringCSS StylingCode FormattingDatabase OptimizationDate FormattingDocumentationFront End DevelopmentFront-end DevelopmentFrontend Development

Repositories Contributed To

2 repos

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

Submitty/Submitty

Feb 2025 Feb 2026
10 Months active

Languages Used

CSSJavaScriptTwigYAMLPHPHTMLTypeScriptVue

Technical Skills

CSS RefactoringFront End DevelopmentUI/UXCSSFront-end DevelopmentFrontend Development

Submitty/submittyhub.io.git

Jul 2025 Feb 2026
4 Months active

Languages Used

HTMLJavaScriptMarkdownSCSSRuby

Technical Skills

CSSDocumentationFront End DevelopmentJavaScriptUI/UX DesignBack End Development