About me

Hiroki Fujino

Software developer, mainly developing the back end of web applications. Living in Berlin since 2019.

Certificates

• eJPT (2024/03)
• Blue Team Level1 (2024/07)
• Certified Red Team Operator (2025/08)

CTF

• 防衛省サイバーコンテスト (27th / 510)

• picoCTF 2025 (419th / 10460)

  • article
  • writesup

• CryptoCTF 2025 (86th / 364)

  • writesup

• Holmes CTF 2025 (383rd / 7085)

  • writesup

Tech stack

Scala, Go, Rust, Python, AWS, GCP, Kubernetes, DDD, Microservices, CTF, Reverse engineering

Interests

Cyber security, Linkin Park, MMA, Boxing, Japanese BBQ

source code