Design and Development of Pakai Lagi: Buyer-Centered Interface for Second-Hand Marketplace

Dadan Rahmat; Hapini Awang; Laili Wahyunita; Sintia Pebrianti

doi:10.15408/jti.v19i2.53694

Authors

Dadan Rahmat Information Technology Education, Faculty of Teacher Training and Education, Universitas Muhammadiyah Sukabumi, Indonesia
Hapini Awang Institute for Advanced and Smart Digital Opportunities, School of Computing, Universiti Utara Malaysia
Laili Wahyunita Department of Sharia Economic Law (Muamalah), Faculty of Sharia, State Islamic University (UIN) Palangkaraya, Indonesia
Sintia Pebrianti Information Technology Education, Faculty of Teacher Training and Education, Universitas Muhammadiyah Sukabumi, Indonesia

DOI:

https://doi.org/10.15408/jti.v19i2.53694

Keywords:

Second-Hand Purchasing, Online Marketplace, Buying and Selling Application, Website, Black Box Testing

Abstract

The purchase of second-hand goods has become a popular trend in Indonesia due to social, economic and environmental factors. Second-hand goods offer sustainable solutions for waste reduction while providing economic value. However, transaction uncertainty and perceived quality risk remain significant barriers in online transactions. This study presents the design, development, and functional evaluation of Pakai Lagi, a localized second-hand marketplace built on client-server architecture. The system utilizes CodeIgniter 3 and MySQL for data administration and backend services, paired with a cross-platform Flutter mobile client for buyers. Development focuses on buyer-centric modules including product discovery, quality and condition displays, seller profiles and instant peer-to-peer communication to mitigate information asymmetry. Empirical evaluation was conducted using the black-box testing method across 14 functional areas comprising 49 test cases. The results demonstrate a functional feasibility for core operational modules. Certain peripheral presentation sub-components, specifically chat layout and complex filtering controls were noted as being under development for future iteration. Ultimately, this study confirms the practical feasibility of a lightweight, low-overhead backend-to-mobile infrastructure for sustainable community-driven e-commerce.

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