Web platform engineer and manager | TypeScript · Node.js · Next.js · Astro · Playwright · AWS · AI agents as a team

const emmanuel: Engineer = {
  name:     "Emmanuel Ruiz",
  role:     "Software engineering manager, Arthrex (global medical device company)",
  location: "Southwest Florida · speaks English and French",

  focus: [
    "🌐 The web platform behind arthrex.com and its family of sites",
    "🩻 X-Ray: a Playwright quality gate that audits ~50 sites every week and on demand",
    "🤖 Working with AI agents as a team: skills, MCP servers, review loops, handoffs",
    "📈 SEO, structured data and AI visibility for a regulated industry",
    "🧑‍🤝‍🧑 Leading a team that ships weekly without trading away quality",
  ],

  stack: {
    languages:  ["TypeScript", "JavaScript", "Python", "Ruby", "Shell"],
    web:        ["Next.js", "React", "Astro", "Jekyll", "Rails", "MDX docs"],
    quality:    ["Playwright", "Vitest", "Lighthouse", "axe", "CodeQL"],
    delivery:   ["GitHub Actions", "Docker", "Kubernetes manifests", "AWS CDK", "Azure"],
    ai:         ["Claude Code", "MCP", "agent skills", "embeddings", "LLM-as-judge"],
  },

  principle: "Pace is a feature. Quality is the floor, not the ceiling.",
};

X-Ray crawls a site with Playwright and checks it before it goes live and every week after: content, links, images, rendering, browser errors, SEO, accessibility, consent and brand terms. It runs on about 50 Arthrex sites and reports to a dashboard, to Teams and to Jira.

• 🧪 60+ checks, each a pure function over a page snapshot, every heuristic shipped with a negative test, so a false positive is treated as a bug
• 🏷️ A Site Health Score that discloses what did not run instead of awarding partial credit
• 🔌 An MCP server and a CLI, so people and agents can start an audit, read findings and ask what a check means
• 🤖 Built with AI agents as a team: a supervisor routes scoped tickets to cheaper models, reviewers judge diffs, hooks guard secrets and the test gate
• 📝 The story of its first month is in One Month at the Frontier

🔒 Internal to Arthrex, so the repository is private. The essay above is the public write-up.

Project	What it is	Tech	Where
🏥 arthrex.com platform	The Next.js platform behind arthrex.com: structured data for videos and techniques, ISR, 404 handling, SEO hardening and performance work.		arthrex.com · 🔒 private repo
🚀 Astro + design tokens	Rebuilding a marketing site on Astro with a token-based design system, measured against the live site with X-Ray and Lighthouse.		🔒 private proof of concept
🖥️ X-Ray portal	A Next.js front end over X-Ray's reports: history per site, findings by rule across the portfolio, signed report links, deployed with AWS CDK.		🔒 private repo
✍️ mister99.dev	Essays on building software with AI agents, published with Jekyll and GitHub Pages, with generated link-preview cards.		Visit · Repo

Project	Contribution	Tech	Where
🧱 Instatic	Evaluating an open-source visual CMS for static sites; fixing what I hit on the way: CSS custom properties dropped by the publisher, imported color and font tokens whose var() references were not rewritten.		Pull requests · Issues

• 🤖 AI agents as a team, not a tool. Supervisor and worker roles on different models, skills that encode how a repo is judged, hooks that block secrets and loose files, handoffs between sessions. The question I keep asking: how far can a small team's pace go without the quality floor moving?
• 📡 AI visibility. How LLM answer engines read, cite and rank sites, and which page-level signals move that for a regulated industry. Measured, not guessed.
• 🧱 Static-first publishing. Astro, design tokens and an open-source visual CMS as an alternative to Webflow for marketing sites, judged by the same audit as the sites they would replace.
• 🧠 Embeddings in quality checks. Paraphrase detection for approved claims, portfolio overlap and prompt answerability, on small open models.
• 🍪 Consent that actually works. Checking that each consent category only activates its own tags, on real banners, with a real browser.
• ✍️ Writing it down. One essay a month on what building at this pace teaches, at mister99.dev.

Most of my commits land in private Arthrex repositories: about 1,900 contributions across 24 repositories in the past year (October 2026). The graph above counts them; the public repository list does not.

One Month at the Frontier What thirty days of building X-Ray taught me about pace, quality and leading with AI