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harungecit/README.md

Hi there, I'm Harun Geçit

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🚀 About Me

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I'm a Full Stack Developer & AI Engineer based in İstanbul, Türkiye, with 15+ years in software development and 2+ years of hands-on AI/LLM engineering. I design scalable systems and build with Large Language Models every single day.

  • 🧠 I engineer RAG pipelines, multi-agent orchestration and multi-LLM systems in production
  • 🌱 Currently deep in AI Infrastructure, Cloud Native Development & DevOps
  • 💻 Building products with Laravel, Go, React/Next.js, TypeScript & Python — lately shipping edge-native apps on Cloudflare Workers (D1 · R2 · KV)
  • 🔐 Exploring AI-powered code review, vulnerability scanning & security automation
  • 📝 I regularly write on echo.harungecit.dev
  • 🤝 Open to collaborating on Open Source & production AI systems
  • 🗂️ I run my freelance pipeline on my own tool, Atlas PM — clients start at basvuru.harungecit.dev
  • 📫 Reach me at info@harungecit.com — or explore my portfolio at harungecit.dev

💡 Fun fact: my portfolio is an interactive "HarunOS" — a desktop-like OS experience with draggable windows, right in your browser.


🤖 AI & LLM Engineering

🧩 What I build

  • RAG pipelines on PostgreSQL + pgvector
  • Multi-agent orchestration & multi-LLM routing
  • Fine-tuning & PageIndex-based training workflows
  • Web-search agents & custom skills
  • Token accounting & cost optimization
  • AI-powered code review & security scanning

🛠️ Daily AI toolbelt

  • Claude Code · OpenAI Codex · Gemini CLI
  • Cursor · GitHub Copilot · TRAE
  • Custom agents & orchestration layers
  • Embeddings · function calling · prompt engineering
  • TensorFlow · Python ML tooling

🔄 My LLM-driven development lifecycle

LLM-driven development lifecycle: Development → Test → Staging → Production, as a continuous AI-assisted loop

🛠️ Tech Stack & Tooling

Languages & Frameworks



Databases & Search



Cloud, DevOps & Infrastructure



Edge & Serverless

Modern Stack & Tooling

📌 Featured Projects

🗂️ Atlas PM · 2026– Freelance CRM / project panel + public client-intake form, shipped as one Cloudflare Worker serving 4 domains — Next.js 15 via OpenNext, D1 + Drizzle (34 tables), R2, KV, cron; scrypt/TOTP auth, 11-layer spam defence, license API. Next.js TypeScript Cloudflare Workers D1 R2 KV

🧠 RAG Knowledge Engine · 2024– Production RAG system on PostgreSQL + pgvector with multi-LLM support. PostgreSQL pgvector LLM Python

🤝 Multi-Agent AI Toolkit · 2024– LLM orchestration layer routing tasks across multiple models. Orchestration Multi-LLM Agents

🎓 AI Infra Academy · 2025– Interactive bilingual app for learning AI infrastructure engineering. Source React TypeScript Tailwind

📧 PHP Email Validator · OSS Validation library detecting 4,900+ disposable domains. Packagist PHP Composer

🛰️ Vigilon · OSS Multi-platform service monitoring — Go, SQLite & Docker. Go SQLite Docker

🧾 UBL Viewer · OSS Browser extension for Turkish e-Invoice & UBL documents. Firefox Browser Extension UBL

📝 Smart Changelists · OSS VS Code extension with JetBrains-style changelists. Marketplace VS Code TypeScript

🧪 AI Training Platform · 2022– Smart training with AI-supported exercises. Python TensorFlow

🏭 Also: RFID Tracking System (enterprise textile inventory) · DevTools Platform · BRAISLATOR (Braille translation PWA) — full case studies at harungecit.dev

💼 Experience

Period Role Focus
2022 – Now Full Stack Developer & AI Engineer — USTEK RFID Go · Laravel · RAG · pgvector
2022 – Now Software Advisor & AI Engineer — CatchPad Python · TensorFlow · multi-LLM
2021 – 2022 Full Stack Developer — Gourmeturca.com Laravel · ERP integrations
2020 – 2021 Full Stack Developer — Sadıkoğulları Teknoloji Sentiment analysis · Docker
2011 – 2019 Freelance Full Stack Developer WordPress · Server admin

🧰 What I Can Help With

Production AI systems · RAG & vector databases · LLM integration & orchestration Full stack web development · Edge / serverless apps (Next.js on Cloudflare Workers) · DevOps & cloud infrastructure AI-powered code review & security · Consultation & software advisory

📊 GitHub Stats

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📈 Contribution Activity

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🗂️ Profile Summary

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repos per language most commit language
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✍️ Latest from the Blog

📖 Read my latest articles on echo.harungecit.dev — AI infrastructure, RAG, LLM engineering, DevOps & cloud native.


💬 Let's build something

Have a project in mind? The fastest way is the intake form at basvuru.harungecit.dev — it lands straight in my pipeline.

⭐️ From harungecit — designing scalable systems, one LLM at a time.

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  1. php-email-validator php-email-validator Public

    PHP email validation library to check format, disposable emails, and MX records.

    PHP 3

  2. terminal-portfolio terminal-portfolio Public

    An app with minimalist terminal templates and features you can use for your personal portfolio website.

    JavaScript 1

  3. smart-changelists smart-changelists Public

    JetBrains-style changelists for VS Code. Save snapshots of your changes into multiple groups.

    TypeScript 5

  4. vigilon vigilon Public

    Vigilon is a comprehensive multi-platform service monitoring and alerting system designed to monitor services across Linux, Windows, and other platforms. It provides real-time status updates, histo…

    Go 1

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