🔐 Cipher  _{graduation project · published}
End-to-end encrypted P2P messaging. A Go networking and crypto core connects over WebRTC, falls back to UDP and then to an encrypted relay, and is bridged to Flutter with Gomobile.
Go Flutter WebRTC
→ project page · paper (DOI)

🗝️ Password Vault  _{desktop · downloadable}
Password manager with one encrypted vault file: Argon2id key derivation, XChaCha20-Poly1305, atomic saves and wiped key memory. Password health, k-anonymity breach check, 2FA codes and browser CSV import.
C++ Qt libsodium
→ repo · download

📦 Zarf  _{web + CLI · live}
End-to-end encrypted file sharing: files are encrypted on the device and the key stays in the part of the link after #, so the server never sees it. Send a link, request files, or send with a short code, in the browser or from the command line.
Go TypeScript WebRTC
→ repo · live demo

🕵️ KVKK Document Assistant  _{AI · live}
Ask an AI model about documents full of Turkish personal data without sending that data to it. Names, ID numbers, IBANs and more are masked by rules plus a Turkish BERT model I trained; long documents go through RAG, and the real values are restored only on the server.
Python FastAPI ONNX
→ repo · live demo

🎬 Seans  _{web · live}
Cinema booking with a live seat map, seat holds that expire, Stripe payments, signed QR tickets and a door check screen for staff.
React Express PostgreSQL
→ repo · live demo

❓ Quiz App  _{web · live}
Quiz with categories and easy/medium/hard levels. Play with friends using a room code on a Node.js room server, with AI-written questions checked by a second model. Answers stay on the server, so the quiz can't be cheated from dev tools.
JavaScript Node.js Vercel Functions
→ repo · live demo

📚 Sahaf  _{web · live}
Online bookshop for public-domain classics in its own cover series, with every cover drawn by the app. Stripe checkout, bulk orders for schools, an admin panel and full Turkish/English support.
C# ASP.NET Core PostgreSQL
→ repo · live demo

🎭 Spy Game  _{web · live}
Real-time party game for 3–12 players, each on their own phone: one player is the spy who doesn't know the location. Rooms, roles and voting run over SignalR with Redis.
C# SignalR Redis
→ repo · live demo