Front-End & Back-End Engineer · B.S. Computer Science
I’m Kenneth Martinez. I design and build polished web apps, and the APIs, data and deployment behind them.
Ideas, shipped.
The three New Hampshire Apple Stores tracked by NH iPhone Pickup.
Selected work
Things I’ve shipped.
Each card shows its status, the stack, and what I engineered. The two deepest have case studies.
Parlay N’ Roll
Calculator.
Type American odds. Hit =.
The odds math from Parlay N’ Roll, rebuilt as a 3D device: keyboard and touch input, validation, and a regular calculator mode.
Skills
Tools I ship with.
- Core
- JavaScript, TypeScript, React, HTML/CSS
- Platform & data
- Cloudflare Workers, Pages, D1 (SQL), KV, Web Push, Canvas
- Programming
- Java, Python
- Tools & design
- Git, GitHub, Photoshop, Sony Vegas, Excel
- AI-assisted
- ChatGPT, Claude
Process
Idea to live.
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Idea
One clear goal.
Who it’s for, what it has to do, and how I’ll know it works.
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Design
Type, layout, detail.
A type scale, a grid and real components before any polish.
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Motion
Only where it helps.
Timing with a purpose, and a reduced-motion path for everyone else.
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Ship
Tested, deployed, maintained.
Automated checks, a Cloudflare deploy, then iterate on what’s real.
About
I build web apps end to end. Front end: JavaScript, TypeScript, React, HTML/CSS, Tailwind CSS, Canvas and three.js, with responsive, accessible UI and a close eye on performance. Back end: Node.js, REST APIs on Cloudflare Workers and Pages Functions, SQL on D1, KV storage, edge caching, Web Push and PWAs, with zod validation and automated tests. Everything ships to production on Cloudflare through Git and GitHub, and I work in English and Spanish.
Contact
Hiring, or building something?
Open to front-end and software engineering roles, and selected freelance builds.