Calina Winfield

Personal Portfolio & Coursework Directory | HTML5, CSS3, cPanel, GGC Domains

Jan 2025 - Current

• Built and deployed a live responsive portfolio homepage using HTML5 and CSS3 layout architectures.
• Managed server deployment and directory hosting structures utilizing cPanel web hosting tools.
• Separated design aspects into a global style framework (global.css) to ensure visual consistency and code reusability.
• Leveraged browser developer tools to assess CSS inheritance, perform cross-browser layout debugging, and optimize asset loading.

Free Online Testing Site | PHP, MySQL, phpMyAdmin, HTML5, CSS3

Completed | March 2026 - April 2026

• Built a PHP and MySQL web app with automated quiz scoring, user registration, profile editing, and avatar image uploads.
• Implemented distinct user and admin roles, giving admins elevated privileges to modify user data and review comprehensive score tables.
• Structured SQL schemas to securely store, map, and query relational data between user profiles and multiple quiz attempts.

Mock APATH Site | PHP, MySQL, phpMyAdmin, HTML5, CSS3

Completed | April 2026 - May 2026

• Architected a relational database featuring multiple joined tables using phpMyAdmin to handle complex, relational data aggregation efficiently.
• Programmed a server-side PHP authentication system utilizing role-based access control (RBAC) to securely manage varied user account types and permissions.
• Formulated optimized SQL queries to execute seamless CRUD operations based on real-time user interaction.
• Utilized backend validation and session tracking to protect sensitive routing pathways and maintain state across user sessions.

Mock Online Store | PHP, MySQL, phpMyAdmin, HTML5, CSS3

Completed | April 2026 - May 2026

• Architected a full-stack mock online store utilizing PHP server-side logic and phpMyAdmin to manage user accounts and dynamic product inventories.
• Engineered a custom session-based shopping cart algorithm to handle multi-page persistence of user selections, item quantities, and financial totals.
• Implemented role-based access control (RBAC) separating customer storefront interfaces from administrative back-office inventory dashboards.
• Structured reusable presentation layouts with modular CSS styling to ensure uniform rendering across distinct transactional workflows.

Visual Portfolio Web App | roles of Documentation Lead & Data Modeler

Jan 2026 - May 2026

• Helped to architect a scalable NoSQL database layout in MongoDB, establishing optimized document relationships and collections to support complex portfolio rendering.
• Implemented object data modeling (ODM) via Mongoose to enforce strict schema validation, data integrity, and backend type safety.
• Authored comprehensive technical documentation, including user stories narratives and system architecture diagrams, to align team development with core requirements.
• Helped to manage sprint workflows and tracked deliverables by configuring Epics, User Stories, and sub-tasks within JIRA.
• Facilitated Agile practices, leading backlog refinement sessions and estimating task complexities using Story Points to optimize team velocity.

Sports Stats Game | PHP, MySQL, phpMyAdmin, HTML5, CSS3

In Progress | Sept 2026 - Oct 2026

• Developed an interactive, responsive sports trivia game using vanilla JavaScript, HTML5, and CSS3.
• Uses public APIs from ESPN to get stat information, and plugs the information into the game.
• Integrated the browser localStorage API to keep user streak data across sessions, ensuring continuous gameplay without requiring backend authentication.
• Designed robust DOM manipulation logic to freeze interactive elements during feedback evaluation.

StayUp | HTML5, CSS3, Electron, MediaPipe, SQLite, browser storage

In Progress | Sept 2026 - Current

• Built an on-device tracking pipeline using MediaPipe Face Mesh and Pose Landmarkers, calculating Eye Aspect Ratio (EAR) and head pitch/yaw for live drowsiness and posture detection.
• Reduced inference to 1–2 FPS to minimize CPU/GPU overhead and preserve battery life during continuous background monitoring.
• Developed a desktop interface featuring a collapsible icon sidebar and custom calibration tools to deliver low-friction notifications and reduce false alerts.

*Non-Development Project*

Personal Home Media Server (Jellyfin)

In Progress | Sept 2026 - Current

• Refurbished legacy laptop hardware by upgrading mechanical HDD to high-speed SSD, reducing system boot times and I/O bottlenecks.
• Deployed and maintained an open-source Jellyfin media server, configuring secure user authentication and automated library indexing.
• Implemented local network routing and port management to support low-latency streaming across concurrent mobile, web, and desktop clients.