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All Journal International Journal Software Engineering and Computer Science (IJSECS)
Felix David
Satya Wacana Christian University
Computer Science & IT

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UI/UX Design of the Sigmawave Website Using the Design Thinking and Design Sprint Methods (Case Study of PT. Blue Silo Pte. Ltd) Andreas David DL Hardi; Felix David
International Journal Software Engineering and Computer Science (IJSECS) Vol. 4 No. 3 (2024): DECEMBER 2024
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v4i3.3123

Abstract

Marketing is a crucial aspect of any business in the modern era that can make or break a company. Good User Interface (UI) design is essential to present information to users in an engaging yet meaningful manner. PT Blue Silo Pte. Tempo Communications Pte. A modern UI update was required for Sigmawave to support new features and enhance the experience. Designing the Sigmawave interface with Design Thinking and Design Sprint methodologies This study proposes. This process allows designs to emerge quickly that truly align with user requirements. Data was collected through open-ended interviews and surveys, where usability was assessed using the System Usability Scale. The research process consisted of user research, problem definition, ideation and prototyping, and solution validation. These designs have enhanced the user experience and also provided more assistance to the company’s marketing strategy with a simpler yet appealing front-end
Performance and Stability Evaluation of Concurrency Models for I/O-Bound Services in Golang under High-Volume Transaction Load Salsabila Yunita Sari; Felix David
International Journal Software Engineering and Computer Science (IJSECS) Vol. 6 No. 2 (2026): AUGUST 2026
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA), Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v6i2.7490

Abstract

Large-scale transaction processing in I/O-bound services can lead to performance bottlenecks and database instability, particularly on resource-constrained servers. An inappropriate concurrency strategy may cause excessive memory consumption and system failure under high workloads. This study compares the efficiency and stability of three concurrency models in Go: Sequential, Unlimited Goroutine, and Worker Pool with a Backpressure mechanism for processing 11 million transaction records against a PostgreSQL database. Testing was conducted in an isolated environment using Docker containers running on a Colima virtual machine configured with 4 CPU cores, 8 GB RAM, and a maximum of 50 database connections. Data were retrieved iteratively using Dynamic Keyset Filtering, while the batch size was calibrated through a preliminary tuning experiment. The results indicate that a batch size of 16,000 provided a balance between I/O efficiency and memory stability. The Unlimited Goroutine model failed to complete the workload due to an out-of-memory (OOM) condition. The Sequential model processed all records in 632 seconds with a throughput of 17,405 transactions per second (Tx/s). The 4-worker Worker Pool achieved the highest throughput at 21,917 Tx/s in 502 seconds, while the 8-worker Worker Pool achieved 19,755 Tx/s in 557 seconds with a 0% error rate and more consistent performance across the tested conditions. Based on the consistency of its performance, the 8-worker Worker Pool was selected as the preferred configuration in this study. These findings indicate that combining a Worker Pool with Backpressure and an appropriately calibrated batch size can improve the performance and stability of large-scale, Go-based transaction processing under the tested conditions.
Co-Authors Andreas David DL Hardi Salsabila Yunita Sari