Natural languages: Japanese (native), English (business, Level:
CEFR B2 High based on
PROGOS test), Korean (casual
conversation)
Programming languages: Java, Kotlin, Python, JavaScript (Go, C,
C++, Perl, Ruby for hobby and education)
DB/Middlewares: Elasticsearch, Redis, HBase, Kafka, MySQL
Others: CentOS, Ubuntu, Ansible, Docker, nginx, Computer Vision
basics, Deep Learning basics, Hadoop Ecosystem (Hadoop, YARN, Hive,
Spark, Presto)