Full-stack E-commerce

The starting point

During my internship at Turkuvaz Media, I built an end-to-end e-commerce platform on the book, electronics, stationery and hobby catalog of D&R, a company within the group: a back-end API, a web store, an admin panel and a mobile app. Web and mobile talk to the same API; one back end, two clients.

Web store and mobile app

• Category tree, price and stock filters, sorting
• Full-text search that tolerates typos, with autocomplete
• Product page: images, stock status, details such as ISBN, page count and publisher for books, similar products
• Cart (Redis for guests, the database for members), discount coupons, a free-shipping threshold
• Multi-step checkout: address → card → confirmation; 3D Secure and installments with iyzico
• Order tracking, history, favorites, addresses; email verification, password reset and order emails

Admin panel

• A dashboard with sales charts and summary statistics
• Product, category, order and coupon management; image uploads with Cloudinary
• An audit log that records every action admins take

Under the hood

• Concurrency control that prevents stock conflicts when users buy the same product at the same time
• Idempotency keys that prevent duplicate orders
• Two-layer caching (in-memory + Redis); tokens and refresh in httpOnly cookies; rate limiting on login endpoints
• PostgreSQL, Redis, email and logging infrastructure with Docker Compose

Source code

The code for the web store and the API is on GitHub; the mobile app's code is in a separate repo.