Everything related to web development, especially infrastructure and DevOps
Capture the Flag (CTF) competitions and security: southball, member of Wani Hackase
(In the past) competitive programming: AtCoder (southball), Codeforces (southball)
IPA Applied Information Technology Engineer Examination (AP) (Japanese): since 2021/12
AWS Certified Solutions Architect - Associate (SAA): since 2022/11
IPA Database Specialist Examination (DB) (Japanese): since 2022/12
AWS Certified Security - Specialty (SCS): since 2023/11
GCP Associate Cloud Engineer (ACE): since 2024/02
Twitter: @southball02
GitHub: southball