I’m Kenneth Martinez. I design and ship production end to end, from the to the and behind it.

Selected work

Building now · open to roles

Ideas, shipped.

Live pickup stock for New Hampshire’s three Apple Stores, from NH iPhone Pickup.

Selected work

Live in production.

Four products, live or in beta, each built end to end: design, front end, APIs, data and deploys. Parlay N’ Roll and NH iPhone Pickup have full case studies.

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Swipe or drag

Parlay N’ Roll

Calculator + dictionary.

Enter American odds, then press =.

Parlay N’ Roll’s odds engine, rebuilt as an interactive 3D device: keyboard and touch input, input validation and a standard calculator mode. Alongside it, entries from the app’s 109-term dictionary.

PNR dictionary

All 109 terms
Contact→

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
    Audio
    Sound design and audio engineering with the Web Audio API: synthesized effects and recorded mechanical keyboard sounds
    Tools & design
    Git, GitHub, Photoshop, Sony Vegas, Excel
    AI-assisted
    ChatGPT, Claude
    Kean University · B.S. Computer Science Bilingual · EN / ES
    0interface languages in NH iPhone Pickup
    0betting concepts in the Parlay N’ Roll dictionary
    0automated test files in Parlay N’ Roll

    Process

    Idea to live.

    1. Idea

      Scope it sharp.

      Who it’s for, the one job it must do, and how success is measured.

    2. Design

      Systems before pixels.

      A type scale, a spacing grid and real, reusable components come first, so every screen stays consistent before any polish.

    3. Motion

      Motion with intent.

      Every animation earns its place, with a reduced-motion path for anyone who needs it.

    4. Ship

      Ship, then sharpen.

      Automated tests gate every deploy to Cloudflare, then I iterate on real usage.

    AboutFront-End & Back-End Engineer

    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?

    I’m looking for full-time engineering roles and select contract work, taking products from first sketch to production. If you’d like to sponsor or partner with Parlay N’ Roll or Offday.club, I’d love to hear from you.

    Support

    Buy me a coffee?

    If something here sparked an idea or saved you some time, a coffee keeps the next build going. Iced pumpkin spice, ideally.

    Buy me a coffee $5

    or Zelle