React · TypeScript · JavaScript · PostgreSQL · Full-Stack Web Applications

I build practical, user-focused web applications and bring a background in technology, education, and technical problem-solving to the way I design, test, troubleshoot, and communicate software.

I build technology. I teach it. I make it easier to use.

View My Developer Portfolio → · Explore My Projects →

React · TypeScript · Supabase · PostgreSQL · Vitest · Playwright · GitHub Actions

A deployed full-stack application with authentication, password recovery, Row Level Security, tenant-aware database constraints, relational CRUD workflows, dated assessment history, and dashboard logic. Quality is backed by 27 Vitest and React Testing Library tests, Playwright browser smoke tests, and a GitHub Actions pipeline that runs linting, both test layers, and the production build on every pull request.

Live Application · Source Code · Case Study

JavaScript · Accessible UI · Search · Local Storage

A searchable technical reference with keyboard interaction, responsive navigation, progressive disclosure, persistent reading progress, and theme preferences.

Live Application · Source Code

JavaScript · State Management · Responsive UI · Accessibility

A product-focused frontend with centralized interface state, validated quantity controls, demonstration cart behavior, responsive navigation, accessible feedback, and original CSS artwork.

Live Application · Source Code

• Frontend: React, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS, responsive design
• Backend + Data: Supabase, PostgreSQL, authentication, Row Level Security, relational modeling, CRUD
• Testing + Quality: Vitest, React Testing Library, Playwright, TypeScript checking, ESLint, accessibility
• Workflow: Git, GitHub Issues, feature branches, pull requests, GitHub Actions, Vercel deployment

Planned stack: TypeScript · NestJS · PostgreSQL · Docker

A multi-tenant service operations platform in its planning phase. The repository currently contains product requirements, architecture decisions, a threat model, delivery standards, and an issue-based roadmap — no application code yet. Implemented features will be listed here as they ship.

For software-development opportunities, email marsharineasimpson@gmail.com.