‧ Developing and maintaining backend programs using the NestJS framework. ‧ Utilizing NoSQL/RMDB databases. ‧ Planning data exchange methods compliant with Restful API standards for communication with the frontend. ‧ Utilizing cloud services provided by GCP (Google Cloud Platform). ‧ Independently developed a complete in-app purchase system from 0 to 1. ‧ Maintained the app's push notification center and implemented push notification functionality.

‧ Responsible for the development and maintenance of all internal and external websites of the group. ‧ Constructing highly scalable, highly available, and maintainable systems (microservices). ‧ Building a technical platform and gradually improving system iteration using new technologies. ‧ Independently developed the PX Pay payment system from 0 to 1.

‧ Acquired web development technology 60 - 70 hours per week for 24 weeks. Week 1 - Week 16: Focusing on fundamental Full-Stack development. Week 17 - Week 24: Aiming at deeper Back-End specialization. ‧ Developed a Full-Stack e-commerce tourism website in 6 weeks with minimal guidance. ‧ Collaborated with other trainees to develop a weather forecast project through Git flow. ‧ Joined a study group focusing on Back-End development knowledge.

Generated ideas for commercials and developed new clients.

‧ Made reservations for hotels, golf courses, and transportation in Japan. ‧ Did Japanese translation and a tour leader.