<![CDATA[The rapid development of information technology has encouraged businesses to adopt digital systems to improve their commercial activities. ITEM1TIME is an online thrift store that currently relies on social media for marketing, while transactions are conducted manually through chat, resulting in inefficient management of product, order, and sales data. This study aims to design and implement a web-based e-commerce system for ITEM1TIME to improve operational efficiency and expand its market reach. The system was developed using the Waterfall methodology, which includes requirement analysis, system design, implementation, testing, and maintenance. The application was built using the Laravel framework and MySQL database, featuring product management, category management, product search, user authentication, shopping cart, checkout, payment confirmation, order management, and customer reviews. Black Box testing results indicate that all system features functioned as expected. The implemented system enhances transaction efficiency, improves data management, and strengthens the competitiveness of ITEM1TIME. Keywords: E-commerce; Laravel; Waterfall Method; Online Store; Thrift Products. Abstrak Perkembangan teknologi informasi mendorong pelaku usaha memanfaatkan sistem digital untuk meningkatkan efektivitas kegiatan perdagangan. ITEM1TIME merupakan toko online yang menjual produk thrift, namun proses pemasaran masih melalui media sosial dan transaksi dilakukan secara manual melalui chat sehingga pengelolaan produk, pesanan, dan laporan penjualan kurang efisien. Penelitian ini bertujuan merancang dan mengimplementasikan sistem e-commerce berbasis web menggunakan metode Waterfall dengan tahapan analisis kebutuhan, perancangan, implementasi, pengujian, dan pemeliharaan. Sistem dikembangkan menggunakan framework Laravel dan database MySQL, serta dilengkapi fitur pengelolaan produk, kategori, pencarian, autentikasi pengguna, keranjang belanja, checkout, konfirmasi pembayaran, pengelolaan pesanan, dan ulasan pelanggan. Hasil pengujian Black Box menunjukkan seluruh fitur berjalan sesuai kebutuhan. Implementasi sistem mampu meningkatkan efektivitas transaksi, mempermudah pengelolaan data, serta mendukung peningkatan kualitas layanan dan daya saing ITEM1TIME. ]]>
