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Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: StarstruckAchievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pair Extraordinairex2Achievement: Pull Sharkx3Achievement: StarstruckAchievement: QuickdrawAchievement: YOLO

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JosephDoUrden/README.md

Yusufhan Saçak

Lead Engineer at rubica — building AI platforms for Australian financial advisers. I founded the platform end-to-end: multi-provider chat (AWS Bedrock, native Anthropic, Google, OpenAI), a Model Context Protocol (MCP) connector fleet, and the security posture that runs them.

Background in Cyber Security and Computer Engineering. Mostly TypeScript on Node.js and Next.js, with the Anthropic SDK on the platform side.

→ yusufhan.dev · /now · linkedin · x

Open source

  • vercel-seo-audit — CLI auditing Next.js / Vercel deploys for SEO and indexing failures. Published on npm.
  • webhook-hmac-kit — Stripe-style webhook signing without the Stripe lock-in.
  • clean-repo-standard — Production-safe GitHub repo template: branch protection, CI, PR templates, verified commits.

Recent contributions

Security

  • CVE-2026-44429 — Stored XSS in the official Model Context Protocol Registry catalogue UI. Disclosed and patched, May 2026. Assigned by GitHub-as-CNA.

Writing

The Lessons series — long-form essays on production AI systems, MCP, LLM infrastructure, and security engineering.

Pinned Loading

  1. vercel-seo-audit vercel-seo-audit Public

    If you're using Vercel and Google hates your site, this is for you.

    TypeScript 72 3

  2. webhook-hmac-kit webhook-hmac-kit Public

    Stripe-style webhook signing without the Stripe lock-in.

    TypeScript 1

  3. clean-repo-standard clean-repo-standard Public

    A production-safe GitHub repo template with branch protection, CI, PR templates, and verified commits — built for small teams and solo devs.

    1

  4. SetTimer SetTimer Public

    A minimalist workout timer app designed specifically for set-based workouts like ab/core training, HIIT, and interval training. Focus on your workout while Workout Set Timer handles the timing auto…

    Dart 11 1