Halil Rodi Dağ

I build mobile apps, AI-powered products and the backend systems behind them — from a Flutter screen to the model and data it depends on.

Mobile · Artificial Intelligence · Backend · Web

1. Puzzle Arena

   puzzlearena.net

   Web · Realtime · Multiplayer

   A free, real-time multiplayer jigsaw platform. Friends share one table, see each other’s cursors, talk over camera and mic, and turn their own photos into puzzles in seconds.

   Next.js · React · WebRTC · Realtime sync · Image processing

2. XyloFit

   xylofit.net

   Mobile · AI · Social fitness

   A cross-platform fitness app that pairs calorie tracking and AI-assisted meal logging with head-to-head PvP challenges — so the reason to open it tomorrow is someone to beat.

   Flutter · Firebase · AI integrations · FCM · AdMob

3. Personal AI Assistant

   AI · Automation · Interface

   A custom AI assistant with a reactive, systems-style interface. It routes intent, calls tools, remembers context and automates the small workflows that eat a day.

   Python · LLM tool calling · RAG · Speech I/O · WebSocket · Web UI

4. HALLGuard

   hallguard.org

   Automation · Security · Discord

   A Discord moderation and server-management system focused on security: automated protection against spam and raids, configurable rules, and an audit trail for every action.

   Discord API · Gateway events · Python · REST APIs · Web dashboard

Mobile

Flutter, React Native, Firebase, FCM, AdMob

AI / ML

Python, PyTorch, TensorFlow, BERT, NLP, RAG, LLM systems

Backend

Python, Django, Flask, C#, .NET, WebRTC

Web

Next.js, React, TypeScript, JavaScript, HTML, CSS

Data / Infra

Firestore, MSSQL, REST APIs, Git

1. FoundationB.Sc. Computer EngineeringAlgorithms, data structures, systems and software engineering — the fundamentals everything else stands on.
2. SpecialisationArtificial Intelligence & Machine LearningDeep learning, NLP and evaluation practice; transformer-based text classification with BERT.
3. CraftMobile development with Flutter & FirebaseSettled on a stack for shipping cross-platform products quickly without sacrificing quality.
4. PracticeClient & freelance projectsBusiness websites, management systems, mobile apps and Discord automation for real clients with real deadlines.
5. OwnershipIndependent productsXyloFit, HALLGuard and a personal AI assistant — designed, built and operated end to end.
6. NowLLM systems inside real productsRetrieval, tool use and agentic workflows — wired into mobile apps people actually open every day.

• WebRTC Calling — WebRTC, WebSocket, JavaScript
• BERT Text Classification — Python, PyTorch, BERT
• Machine Learning Studies — Python, TensorFlow, PyTorch
• Flutter Client Apps — Flutter, Firebase
• Firebase Backends — Firestore, Firebase Auth, FCM
• REST API Services — Python, Django, Flask
• Discord Automation — Discord API, Python
• Business Management System — C#, .NET, MSSQL
• Business Websites — Next.js, React, TypeScript
• React Native Prototypes — React Native, TypeScript