CODEX: Journal of Software Engineering
CODEX: Journal of Software Engineering is a peer-reviewed scientific journal dedicated to the dissemination of high-quality research, theoretical studies, and technological innovations in the field of software engineering. The journal focuses on advancing knowledge and best practices in software development, system design, and intelligent software applications that support digital transformation and technological advancement in various domains. The journal aims to provide an academic platform for researchers, academics, professionals, and students to publish original research and applied studies that integrate theory, methodology, and implementation in software engineering. CODEX emphasizes innovation, scientific rigor, and practical relevance in addressing contemporary challenges in software development and information systems. The scope of CODEX: Journal of Software Engineering includes, but is not limited to, the following areas: Software Engineering Methodologies Software development life cycle (SDLC), Agile methods, DevOps, Extreme Programming (XP), Scrum, Lean software development, and software process improvement. System Analysis and Software Design Requirements engineering, system modeling, UML, software architecture, design patterns, and enterprise system design. Web, Mobile, and Desktop Application Development Design, implementation, and evaluation of web-based, mobile-based, and desktop-based applications, including cloud-based and cross-platform systems. Software Testing and Quality Assurance Software testing techniques, automation testing, verification and validation, quality assurance frameworks, and performance evaluation. Software Project Management Software project planning, estimation, risk management, project monitoring, software metrics, and collaborative development environments. Software Security and Reliability Secure software development, system reliability, vulnerability assessment, cryptography implementation, and information security in software systems. Artificial Intelligence in Software Applications Intelligent systems, machine learning integration, natural language processing, deep learning, expert systems, and data-driven software applications. Data Science and Decision Support Systems Data analytics, big data processing, business intelligence systems, predictive analytics, and decision support system development. Human-Computer Interaction and User Experience (HCI/UX) User interface design, usability engineering, accessibility, user-centered design, and user experience evaluation. Information Systems and Digital Transformation Enterprise information systems, e-government systems, e-commerce applications, smart systems, and digital transformation through software solutions. Emerging Technologies in Software Engineering Internet of Things (IoT), cloud computing, blockchain applications, distributed systems, and smart computing technologies. CODEX: Journal of Software Engineering welcomes original research articles, review articles, and case studies that demonstrate scientific contribution, methodological rigor, and practical implementation in the field of software engineering. The journal prioritizes innovative works that contribute to the development of modern software engineering and intelligent digital systems.
Articles
15 Documents
<![CDATA[EVALUATING A LARGE LANGUAGE MODEL CHATBOT FOR ENHANCING HISTORICAL LITERACY ON PANGLIMA MAYU OF THE SUMBAWA SULTANATE ]]>
<![CDATA[Gusti Arsyad]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 2 (2026): June 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i2.15485
<![CDATA[The digital preservation of regional history in the modern era requires innovative approaches to bridge the gap between traditional archives and user accessibility. This study presents the development and evaluation of the Panglima Mayu ChatBot, a specialized Large Language Model (LLM) designed to enhance historical literacy regarding the 18th-century Sumbawa Sultanate. The chatbot was developed using a prompt engineering approach based on curated historical materials and a culturally grounded system prompt to ensure factual consistency and alignment with Adat Samawa values. Deployed on an autoscale server environment (2 vCPU / 4 GiB RAM), the system was evaluated through a quantitative survey involving 45 respondents, including general users, students, and educators. The results indicate positive technical and educational perceptions. the system achieved a 97.8% satisfaction rate for accessibility and speed, while 84.4% of users reported increased insight into Islamic historical narratives. Crucially, 77.8% of respondents perceived the chatbot's responses as accurate, indicating a high level of user confidence in the information provided. However, these findings reflect perceived accuracy rather than expert-verified historical accuracy, which requires further validation by subject-matter experts. Furthermore, the system showed strong practical utility, with 73.3% of respondents endorsing the ChatBot as a viable quick reference for tourism and educational purposes. These findings suggest that grounded AI personas can successfully preserve cultural integrity—specifically Adat Samawa values—while providing an interactive alternative to traditional textbooks. This research provides a scalable framework for digitizing regional heroic narratives across Indonesia]]>
<![CDATA[DEVELOPMENT OF AN OFFLINE ANDROID-BASED LIBRARY BORROWING SYSTEM USING SQLITE DATABASE ]]>
<![CDATA[Lisa Almayanti]]>;
<![CDATA[M. khizbullah]]>;
<![CDATA[Ardian Ardian]]>;
<![CDATA[Nur Fitrianingsih]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 3 (2026): September 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i3.16073
<![CDATA[Many institutional libraries still rely on manual borrowing records, causing difficulties in transaction tracking, stock monitoring, and accurate fine calculation. This condition reduces service efficiency and increases the risk of data errors in library administration. To address this problem, this study develops an Android-based Library Book Borrowing System as a digital library management solution. The system was developed using a structured Software Development Life Cycle (SDLC) approach consisting of analysis, design, implementation, and testing phases, employing the Java programming language and a locally embedded SQLite relational database. Unlike cloud-dependent approaches, the proposed system operates entirely without an internet connection, making it suitable for institutions with limited network infrastructure. The system encompasses five core modules: book management, member registration, borrowing and return transactions, automated fine computation, and reporting. A distinctive three-tier validation mechanism—comprising stock availability verification, membership status authentication, and outstanding fine arrear inspection—enforces transactional integrity and prevents unauthorized borrowing. Black-box testing confirmed that all 10 primary functional features achieved a 100% success rate. Media expert validation further affirmed the system's high feasibility for deployment as a fully operational digital library management solution.]]>
<![CDATA[DESIGN AND IMPLEMENTATION OF AN INTEGRATED WEB-BASED ACADEMIC MANAGEMENT AND STUDENT ADMISSION MONITORING SYSTEM USING DJANGO FRAMEWORK ]]>
<![CDATA[M. Noer Fadli Hidayah]]>;
<![CDATA[Hidayatus Sofyan]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 1 (2026): March 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i01.14454
<![CDATA[Educational institutions require integrated systems to manage academic administration and student admissions efficiently. SMK Insan Terpadu still relied on manual and spreadsheet-based processes, resulting in data redundancy, reporting delays, and limited monitoring capability. This study aims to design and implement an integrated web-based academic management and student admission monitoring system using the Django framework. The research applies a system development approach with the Rapid Application Development (RAD) method, including requirement analysis, system design, construction, and testing. Data were collected through observation, interviews, and literature study. The system was developed using Python Django and MySQL database to integrate academic data management, payment administration, and student admission processes into a single platform. System testing was conducted using black-box testing and user evaluation. The results show that all system functions operated successfully with a 100% functional success rate. User evaluation achieved a satisfaction level of 92.4%, categorized as very good. The implemented system improves efficiency, data accuracy, and reporting processes. This study concludes that the integrated web-based system effectively supports academic and admission management and contributes to the development of digital administrative systems in educational institutions.]]>
<![CDATA[WEB-BASED ACADEMIC INFORMATION SYSTEM DEVELOPMENT USING AGILE: A HIGHER EDUCATION CASE STUDY ]]>
<![CDATA[Ahmad Halimi]]>;
<![CDATA[Maulidiansyah Maulidiansyah]]>;
<![CDATA[Dian Widiarti]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 2 (2026): June 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i2.15592
<![CDATA[This research aimed to develop a web-based academic information system using the Agile method to improve academic data management in a higher education institution. The background of this study was based on the need for a more efficient, integrated, and accessible system to manage academic activities, such as student data, lecturer data, course data, schedules, attendance, grades, and academic reports. This research used a research and development approach with a case study design. The system development process followed Agile stages, including requirement analysis, sprint planning, system design, implementation, testing, evaluation, and revision. Data were collected through observation, interviews, and document analysis to identify user needs and academic administration problems. The system was implemented with role-based access for administrators, lecturers, and students. The results showed that the developed system could manage academic data in an integrated manner, improve information access, and support faster academic reporting. Black-box testing showed that the main system functions worked properly, while user acceptance testing indicated positive user responses. This study concludes that the Agile method is suitable for developing an adaptive web-based academic information system.]]>
<![CDATA[DESIGN AND EVALUATION OF AN OFFLINE ANDROID-BASED ACADEMIC SCHEDULING SYSTEM WITH AUTOMATED CONFLICT DETECTION AND REMINDER MECHANISM ]]>
<![CDATA[Adi Alfaisal]]>;
<![CDATA[Nur Fadilah]]>;
<![CDATA[Nur Fitrianingsih]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 3 (2026): September 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i3.16085
<![CDATA[Students with multiple academic activities often have difficulty organizing class schedules, which results in missed sessions, incorrect room information, and overlapping course entries. Existing student scheduling applications mainly provide schedule recording and reminders, and studies that combine automatic conflict validation with offline local storage remain limited. This study aims to design and evaluate an offline Android-based academic scheduling system with an automated schedule conflict detection mechanism and a class reminder mechanism. The system was developed using the Waterfall model, which consists of requirement analysis, system design, implementation, testing, and evaluation. It uses a three-layer architecture, Create, Read, Update, and Delete (CRUD) operations on a persistent SQLite database, a conflict validation query that compares the day and time range of a new entry with stored schedules, and reminders scheduled through Android's AlarmManager. Black-box functional testing with four scenarios showed that all scenarios passed: valid schedules were saved, invalid time input was rejected, overlapping schedules were blocked with a warning, and reminder alarms were registered in the Android system to trigger a local notification 15 minutes before class. These results indicate that the proposed system prevents scheduling input errors without requiring an internet connection. The system provides a practical basis for student time management, and future work should include user acceptance testing, cloud synchronization, and schedule export.]]>
<![CDATA[A MODERN WEB-BASED SERVICE PLATFORM FOR HANDYMAN BOOKING USING REACT JS ]]>
<![CDATA[Arif Faizin]]>;
<![CDATA[Dian Prasti Meintarina]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 1 (2026): March 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i01.14455
<![CDATA[This study aims to develop a modern web-based platform that facilitates handyman service booking using React JS. The lack of integrated digital systems for handyman services often causes difficulties for customers in finding reliable workers and for service providers in promoting their services effectively. This research focuses on designing and implementing a web-based application that connects customers and handyman service providers through an interactive and efficient platform. The research method used includes problem identification, data collection through observation and literature study, system requirement analysis, system design, implementation using React JS, and functional testing. The developed system provides features such as user registration, service listing, handyman profiles, online booking, and administrative data management. The results of system implementation and testing indicate that all features function properly and support efficient service booking and information management. The platform improves accessibility, simplifies the booking process, and enhances communication between customers and service providers. The study concludes that the use of React JS in developing a web-based handyman booking platform can effectively support digital service transformation and improve service efficiency.]]>
<![CDATA[DESAIN DAN IMPLEMENTASI PROTOTIPE SISTEM PEMBERSIHAN KANDANG SAPI DAN PEMANTAUAN KETINGGIAN AIR BERBASIS IoT ]]>
<![CDATA[Bayu Nugroho]]>;
<![CDATA[Yuda Septiawan]]>;
<![CDATA[Danang Muktiawan]]>;
<![CDATA[Meiliza Meiliza]]>;
<![CDATA[Agus Rahardi]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 2 (2026): June 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i2.15754
<![CDATA[Peternakan sapi merupakan salah satu sektor usaha yang berkembang di Indonesia, namun proses pembersihan kandang dan pemantauan ketersediaan air masih banyak dilakukan secara manual sehingga menimbulkan beban kerja tinggi dan risiko keterlambatan pembersihan. Penelitian ini bertujuan merancang dan mengimplementasikan prototipe sistem pembersih kandang sapi berbasis Internet of Things (IoT) yang mampu beroperasi secara otomatis dan terjadwal. Penelitian ini menggunakan pendekatan prototype development dengan arsitektur sistem yang terdiri dari NodeMCU ESP8266 sebagai unit kendali utama, aktuator berupa motor DC wiper dan dua pompa air DC, serta sensor ultrasonik HC-SR04 untuk monitoring level air tangki secara realtime. Antarmuka website berbasis XAMPP digunakan untuk pemantauan dan kontrol jarak jauh. Pengujian dilakukan pada tiga skenario utama: jadwal pembersihan, kontrol otomatis pengisian tangki, dan kontrol manual via website. Hasil pengujian menunjukkan bahwa sistem berhasil menjalankan pembersihan kandang sesuai jadwal pada pukul 06.00, 12.00, dan 18.00 WIB dengan tingkat keberhasilan 100%, mengisi tangki air secara otomatis ketika level air kurang dari atau sama dengan 20%, serta menghentikan pengisian ketika level mencapai 90%. Waktu transmisi data dari NodeMCU ke website rata-rata kurang dari 2 detik. Sistem ini berpotensi meningkatkan efisiensi pengelolaan kebersihan kandang sapi secara signifikan.]]>
<![CDATA[DEVELOPMENT OF SCRATCH-BASED SELF-PACED INTERACTIVE SCIENCE LEARNING MEDIA ON THE BUTTERFLY LIFE CYCLE FOR FOURTH-GRADE STUDENTS ]]>
<![CDATA[Ika Damayanti]]>;
<![CDATA[Danil Ashari]]>;
<![CDATA[Rizal Aprianto]]>;
<![CDATA[Nur Fitrianingsih]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 3 (2026): September 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i3.16116
<![CDATA[Elementary science learning is often reported to offer limited interactive visualization, which can reduce students' attention and engagement. This study aims to design, develop, and evaluate a Scratch-based self-paced Interactive Learning Media (MPI) on the butterfly life cycle for fourth-grade students at SDN Nggembe. To limit extraneous cognitive load, the media applies self-paced learning through static illustrations, concise instructional text, and user-controlled navigation buttons (Play, Next, Back, and Menu) that prevent automatic slide transitions. The study followed a researcher-designed four-stage development framework consisting of planning, design (interaction flow and flowchart), implementation (block-based coding), and testing (functional testing and limited field testing). The resulting media comprises a start screen, main menu, topic selection, content screens, and a quiz module with automated instant feedback, in which each correct answer adds 25 points to the score. All predefined functional components were implemented and operated as designed. During limited field testing at SDN Nggembe, students reported that the self-paced navigation helped them follow the metamorphosis sequence comfortably and showed enthusiasm for the media. Learning gains and cognitive load were not measured directly and should be examined in further studies.]]>
<![CDATA[A MOBILE-BASED ALUMNI RELATIONSHIP MANAGEMENT SYSTEM USING EXTREME PROGRAMMING: ENHANCING DIGITAL ENGAGEMENT IN ISLAMIC BOARDING SCHOOL EDUCATION ]]>
<![CDATA[Muhammad Naufal]]>;
<![CDATA[Moh. Furqan]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 1 (2026): March 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i01.14456
<![CDATA[Alumni management plays an important role in strengthening institutional sustainability and engagement in educational environments. However, many educational institutions still manage alumni data manually, resulting in inefficient communication, data fragmentation, and limited interaction between alumni and institutions. This study aims to design and implement a mobile-based alumni relationship management system using the Extreme Programming method to enhance digital engagement in Islamic boarding school education. The research applies a qualitative approach with data collected through observation, interviews, and literature study to identify system requirements. The system is developed using Flutter for mobile applications, React JS for the web-based admin panel, and Firebase as the backend infrastructure. The development process follows Extreme Programming stages, including planning, design, coding, and testing. System evaluation is conducted through Black Box Testing and User Acceptance Testing involving 16 alumni respondents. The results show that the system functions effectively and achieves a user acceptance score of 92.5%, categorized as very good. The study concludes that the proposed system successfully improves alumni data management, strengthens communication, and supports digital transformation in educational institutions.]]>
<![CDATA[BES-OPTIMIZED KNN FOR PURCHASE DECISION PREDICTION BASED ON SOCIAL MEDIA MARKETING AND WORD OF MOUTH QUALITY ]]>
<![CDATA[Firza Septian]]>;
<![CDATA[Yusi Nurmala Sari]]>;
<![CDATA[Nina Dwi Putriani]]>
<![CDATA[ CODEX: Journal of Software Engineering Vol 1, No 2 (2026): June 2026 ]]>
Publisher : <![CDATA[Nurul Jadid University, Paiton Probolinggo, East Java ]]>
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DOI: 10.33650/codex.v1i2.15767
<![CDATA[This study proposes a Hybrid Machine Learning Framework for purchase decision analysis by integrating the Bald Eagle Search (BES) algorithm with the K-Nearest Neighbors (KNN) classifier. The dataset consists of 500 respondents collected through survey instruments, with Social Media Marketing (SMM) and Word of Mouth Quality (WQ) serving as predictor features, while Purchase Perception (PP) items are aggregated to form the target variable. The rapid growth of digital marketing and social media has made indicators such as SMM, which reflects consumer engagement with online marketing activities, and WQ, which captures the credibility of peer recommendations, critical in influencing consumer trust and purchase behavior. To capture these nonlinear relationships, the framework applies systematic data preparation, preprocessing with SMOTE balancing and standardization, and BES optimization to determine the optimal neighborhood size K for KNN. The dataset was split into training and testing subsets with an 80:20 ratio, resulting in 50 test samples used for evaluation each WOA-KNN and BES-KNN. The evaluation was conducted using accuracy, precision, recall, F1-score, and ROC curve analysis. Results show that the hybrid BES-KNN model achieved 96% accuracy, with precision, recall, and F1-score all at approximately 97.9%, indicating balanced and reliable classification performance; however, the moderate AUC value of 0.68 suggests that class imbalance and the distribution of prediction probabilities may have influenced discriminatory power, which explains the apparent inconsistency between high classification metrics and the ROC curve. This framework contributes to advancing machine learning applications in marketing analytics and provides a foundation for future research to refine feature selection and enhance discriminatory power]]>
