# Takashi Mima

Takashi Mima is a backend and security engineer at Mercari, Inc.

# Employments

February 2024 - now
SWE at Flatt Security Inc.
Shisho Cloud / Go, Kubernetes
April 2023 - now
SWE at Mercari Inc.
ID Platform Team / Go, Kubernetes

September 2024
GC24 Recap: Interface Internals (opens new window)
mercari.go #27
September 2024
GopherCon 2024 Recap: Exploring the Go Compiler: Adding a "four" loop (opens new window)
Go 1.23 Release Party & GopherCon 2024 Report
May 2024
OAuth 2.0 Dynamic Client Registration with Terraform Custom Provider in Unleash Mercari Tech! vol.3 (opens new window)
TechBookFest vol.16
November 2023
Compiler Optimization of PGO in Go in Unleash Mercari Tech! vol.2 (opens new window)
TechBookFest vol.15
June 2023
Knowledge by given implementation of logger for debug (opens new window)
Go Conference 2023

April 2024
Teacher for Auth Platform Onboarding of DevDojo (opens new window).
December 2023
Mentor in Mercoin Hackathon (opens new window).
July 2023
Teacher for "Deep Dive into Vulnerabilities with Developing Vulnerability Scanner" (opens new window), Security Mini Camp in Mie.
GitHub Repo for the class[JA] (opens new window)
March 2023
Teacher for Vulnerability Workshop in Aizu.
September / October 2022
Teacher in Web Category, SECCON Beginners in Sapporo / Fukuoka.
August 2022
AI Security Class Tutor, Security Camp 2022 Online.
April 2021 - March 2022
Research-Driven Course Assistant, SecHack365.

GopherCon 2024 Challenge Series (opens new window) 2024
Got 5 Individual Prizes: High Score! / Efficiency Expert / Prolific! / Under the Wire! / Master Spy!
CTF for Connected Cars 2022
2nd Place in CTF for Connected Cars as Team "docter_run"
Geekten 2022
SHAREVOX (opens new window)
Grand Prize in AI/Data Analysis Category as Team "高度セキュリティ人材"
PyTorch Annual Hackathon 2021
prompt2slip (opens new window)
2nd Place in PyTorch Responsible AI Development Tools & Libraries Category with alumnis of SecHack365
Hardening 2020 H3DX
1st Place as Team "おにぎりまみれ"
Open Hack U 2020 Online Vol.5 (opens new window)
1st Place as Team "さぼてんとゆかいな仲間たち"

April 2020 - March 2021
SecHack365 Trainee in Research Driven Course
Malgraph: Malware Detection System by Using Control Flow Graph. (opens new window)
August 2019
Security Camp(Vulnerability / Malware Analysis Course)
June 2019
Database Specialist Examination (DB)
March 2019
TOEIC 720
June 2018
Applied Information Technology Engineering Examination (AP)
November 2017
Fundermental Information Technology Engineering Examination (FE)

December 2022 - January 2023
Backend Engineer Internship at Mercari Inc.
Partner Platform Team / Go, Python, Kubernetes
February 2022
Backend Engineering Internship at Recruit Holdings Co., Ltd.
Hot Pepper Beauty Clinic, Improvement of the bff layer in Web Server / Java, Spring Boot
October 2021 - December 2021
Software Engineering Internship at Mercari Inc.
ID Platform Team, Automation for OIDC Client Creation / Go, Terraform Custom Provider
October 2021 - November 2021
Software Engineering Internship at DeNA Inc.
Go, GCP(Cloud Build, Cloud Run, Pub/Sub)
September 2021 - October 2021
Software Engineering Internship at Wantedly Inc.
Recommendation Infrastructure Team / Go, Kubernetes
August 2021 - September 2021
Software Engineering Internship at Yahoo Japan Corporation.
Advertising Distribution Team, Design-Development-Release-A/B Testing / C++, Java, Go
July 2021 - August 2021
Software Engineering Internship at Akatsuki Inc.
Game Currency Infrastructure Development Team, API Design&Development and Performance Improvement / Go, GCP
March 2021 - July 2021, December 2021 - March 2023
Software Engineering Internship at 3-shake Inc.
Go, GCP
July 2020 - March 2021
Software Engineer Internship at Mynavi Inc.
Go, GCP(Cloud Build, Cloud Run)

April 2021 - March 2023
Master's degree, Department of Electrical Engineering and Computer Science, Shibaura Institute of Technology, Japan.
April 2017 - March 2021
Bachelor's degree, Department of Computer Science and Engineering, Shibaura Institute of Technology, Japan.
GPA 3.99/4.00