Open to freelance & side projects

Fahri Kafalı

Full-stack developer building end-to-end web apps and AI/LLM systems.

I build production B2B e-commerce platforms with Next.js, Node.js and PostgreSQL — including bank/payment and ERP integrations — and I design AI/RAG systems. Computer Engineering graduate of Konya Technical University and co-founder of Arkcode.

View my work Get in touch
GitHub ↗ LinkedIn ↗ Email ↗
ClientNext.js
React 19 · SSR · TanStack Query
APINode.js
Express · JWT · Zod · Socket.io
DatabasePostgreSQL
Repository/Service · migrations

01

About

I ship end-to-end applications with Next.js, React, Node.js and PostgreSQL. I’ve built bank and payment integrations and ERP synchronization for B2B e-commerce; at the startup I co-founded, I delivered digital menus, AI-based image generation and admin panels for local businesses.

I care about clean architecture (repository/service layering, typed boundaries with Zod), pragmatic AI/RAG systems, and fast, accessible interfaces.

Career

Experience

Junior Full-Stack Developer Işıksoft

Sep 2025 – Present

  • Built B2B e-commerce APIs with Node.js, Express and PostgreSQL; integrated banks/payment providers (Yapı Kredi, Akbank, Ziraat, Paycell) and ERP order sync.
  • Developed the customer UI and admin panel with Next.js, React and TypeScript — JWT auth, real-time notifications, file management.

Co-Founder Arkcode ↗

2025 – Present

  • Delivered custom digital menus, admin panels and staff-tracking tools for 10+ local businesses.
  • Built an AI image-generation flow for menu photos; contributed to the PHP, MySQL and Docker codebase.

AI Intern TwinUp

Jul – Aug 2025

  • Built RAG architectures with vector search and context management.
  • Hands-on prompt engineering and constraining LLM outputs.

Skills

Languages
  • TypeScript
  • JavaScript
  • Python
  • SQL
  • C
  • PHP
Frontend
  • React
  • Next.js
  • Tailwind CSS
  • Radix UI
  • TanStack Query
Backend
  • Node.js
  • Express
  • REST API
  • Sequelize
  • JWT
  • Socket.io
AI/ML
  • RAG/LLM
  • NLP
  • CNN
Data
  • PostgreSQL
  • MySQL
Tools
  • Git
  • Docker
  • pnpm
  • Swagger

02

Projects

Things I’ve designed and built — from full-stack apps to optimization engines and AI systems.

02

Projects

Things I’ve designed and built — from full-stack apps to optimization engines and AI systems.

QR Digital Menu Platform

2025

A QR-based digital menu and management system for 10+ local cafés and restaurants.

  • PHP
  • MySQL
  • Docker
  • QR
  • AI Image Gen
Details → Client work

Dayframe

2025

A self-hostable productivity app that unifies tasks, journaling and a calendar in a single surface.

  • Next.js 15
  • React 19
  • TypeScript
  • Tailwind v4
  • PostgreSQL
Details → Source ↗

3D Bin Packing Optimization Engine

2025

Three approaches (Genetic Algorithm, Differential Evolution, Greedy First-Fit) to the NP-hard container packing problem in one engine.

  • Python
  • Django
  • Genetic Algorithm
  • Plotly
  • Optimization
Details → Source ↗

AI/LLM Internship Projects

2025

Selected ML / DL / LLM (RAG) projects: RAG architectures with vector search, a healthcare GPT app, and a CNN image classifier.

  • Python
  • RAG/LLM
  • TensorFlow
  • CNN
  • NLP
Details → Source ↗

Smart Room Dashboard

2025

A real-time IoT dashboard simulator built with Python, Flask and Chart.js.

  • Python
  • Flask
  • Chart.js
  • IoT
Details → Source ↗

03

Writing

All posts →

Notes on full-stack development, AI/RAG systems and things I learn.

04

Contact

I’m open to freelance work and interesting side projects. The fastest way to reach me is by email — based in Konya, Türkiye, working with clients anywhere.

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