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

Achievements

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

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JosephDoUrden/README.md

Hi, I'm Yusufhan 👋

Product-focused Software Engineer building web, mobile, and AI-powered products used by real customers.

I work mainly with React / Next.js, Flutter, and TypeScript, and I enjoy owning features end-to-end — from architecture to production. Background in Computer Engineering and Cyber Security.

Website LinkedIn Twitter

Featured Open Source

vercel-seo-audit — If you're using Vercel and Google hates your site, this is for you.

CLI tool for auditing SEO issues on Vercel-deployed Next.js applications. Checks robots.txt, sitemaps, meta tags, indexing status, and more.

GitHub stars npm

What I Do

  • Build modern web apps with Next.js & React
  • Develop cross-platform mobile apps with Flutter (apps on App Store & Play Store)
  • Integrate AI & automation into real products
  • Deploy scalable systems using Docker, AWS, Azure, Vercel
  • Build open-source developer tools for the web ecosystem
  • Work closely with founders and small teams as a contract engineer

Tech Stack

Languages       TypeScript  JavaScript  Dart  Python  SQL  Java  C++
Frontend        React  Next.js  Tailwind CSS  Framer Motion
Mobile          Flutter (iOS & Android)  React Native
Backend         Node.js  REST APIs  Webhooks  PostgreSQL  Firebase
Cloud & DevOps  Docker  AWS  Azure  Vercel  CI/CD
AI              LLM integrations  AI workflows  Automation pipelines

Notable Work

Project Description Tech
Audi Mobile App 10,000+ users, 4.7 rating on App Store Flutter, Firebase
rubica.au Enterprise CRM platform for financial services Next.js, Salesforce
vercel-seo-audit Open-source SEO audit CLI for Vercel TypeScript, Node.js
SetTimer Workout timer app on App Store Flutter, Dart
ModaModel AI fashion photography app Flutter, Gemini
cloudflare/workerd Contributor — TextDecoder x-user-defined encoding C++
SparkyFitness Contributor — HealthConnect default units fix TypeScript

Currently

  • Contract Software Engineer at rubica
  • Building and shipping product-focused applications
  • Growing open-source tools for the Vercel/Next.js ecosystem
  • Previously: Dogus Technology (Audi, Seat, Cupra) · Baykar Technologies

GitHub Stats

GitHub Streak Top Languages

Website · LinkedIn · vercel-seo-audit

Always building, always learning.

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

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

    TypeScript 55 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 10

  5. RFID-Based-Access-Control-System RFID-Based-Access-Control-System Public

    This project is a Capstone Project for the Computer Engineering Department at Bahçeşehir University.

    Dart 6

  6. Book-Store-Project Book-Store-Project Public

    This is a simple Book Store Project built using the MERN (MongoDB, Express.js, React, and Node.js) stack. This project demonstrates basic CRUD (Create, Read, Update, Delete) operations on both the …

    JavaScript 45 16