Oğuz Ordu

Review Evidence Engine

Answers questions about a product by counting every review that says yes or no, and linking each one.

• Live

• Built a Python and FastAPI service that answers questions such as "does the battery last?" with counts and citations instead of a summary of a few reviews
• Matched ground-truth counts on a benchmark where a top-8 RAG baseline never saw 34 of 50 relevant reviews, by classifying every candidate with Gemini
• Combined PostgreSQL full-text search and pgvector embeddings with reciprocal rank fusion, so reviews worded differently from the question are still found
• Deployed with Docker Compose on an Oracle Cloud VM, with 59 automated tests and a GitHub Actions pipeline that redeploys every passing build

Built with

• Python
• FastAPI
• PostgreSQL
• pgvector
• Gemini API
• Docker
• GitHub Actions

Live demo Source code

Quizle

Real-time multiplayer trivia: 2 to 20 players join with a room code and answer timed questions.

• Live

• Developed the game with a Go backend and a Next.js frontend, with questions in Turkish or English
• Designed the WebSocket server around one goroutine per room, so game state needs no locks
• Kept the countdown on the server, so clients never see the answer before the reveal
• Added a build check that validates all 4,933 questions, alongside 70 Go tests run with the race detector

Built with

• Go
• WebSocket
• Next.js
• TypeScript

Live demo Source code

SubSaver

Keeps all your subscriptions in one place and reminds you before each renewal.

• In beta
• Private repo

• Building a Flutter app for iOS and Android, now in beta on TestFlight
• Imports subscriptions from an App Store or Google Play screenshot with on-device text recognition, so the image never leaves the phone
• Ships a catalog of 52 services with Turkish and US prices, and local reminders before each payment
• Offers optional Apple or Google sign-in with a Supabase backup protected by Row Level Security

Built with

• Flutter
• Dart
• SQLite (drift)
• Supabase
• GitHub Actions

GymApp

A mobile workout planner: browse exercises by muscle group and build your own programs and daily routines.

• Code on GitHub

• Built the app with React Native, Expo and TypeScript, with an exercise library sorted by muscle group
• Let users create custom programs and daily routines, then add, edit or remove exercises day by day
• Secured user data in Supabase with Row Level Security on every table, so each account sees only its own records even though the client key ships with the app

Built with

• React Native
• Expo
• TypeScript
• Supabase

Source code

Movie Review

Rate and review movies, and sort them into Watched, Want to Watch and Favorites lists.

• Code on GitHub

• Created a Flutter app that pulls movie data from The Movie Database (TMDB) API
• Added accounts with Firebase Authentication and stored each user's ratings and lists in Cloud Firestore
• Published a demo Android APK on GitHub so the app can be tried without building it

Built with

• Flutter
• Dart
• Firebase Auth
• Cloud Firestore
• TMDB API

Source code Android APK