Ryohei Sato

• Proposed the optimization of AWS resources to cut down unnecessary costs which led to low profit margin of the service
• By analyzing the cost, computing usage of resources, etc., a total of ¥1.2M/mo was proposed for the cost cutting

• Implemented automated E2E testing on a web application
• The time required for the test necessary on each deployment decreased from 3 hours to 5 minutes

• Took control of the fast-paced project in a team with few experienced team members and managed to improve the open source LLM in the reasoning task benchmark(HLE) by nearly 1%
• Made impact on time management and decision making in times of uncertainty
• Took responsibility on lagging tasks when human resource was scarce to overcome the deadline

2024/04~2025/02 Web Development for Hotel Reservations

• Achieved reproducibility of over 100 AWS resources by implementing IaC on Terraform
• Reduced management cost by implementing batch processing on AWS Lambda and Node.js
• Improved work efficiency by implementing GitHub Actions to automatically deploy AWS resources

2025/02-2025/04 Image Recognition in Public Spaces (e.g. Parking Lots, Shopping Malls, Expressways)

• Debugged fundamental issues in the image recognition system