Profile

Summary Link to heading

Software engineer with 15+ years of experience building and operating high-traffic distributed systems and cloud-native applications. Experienced in Go and AWS with a track record of technical problem-solving, continuous improvement, and working in international engineering teams.

Professional Experience Link to heading

HENNGE K.K. Link to heading

Software Engineer | Tokyo, Japan | November 2024 - Present

Email Archive Service

  • Maintained and operated the SMTP servers that receive a large amount of emails, including introducing autoscaling, improving monitoring, and addressing operational challenges.
  • Proactively maintain and upgrade Go and other dependencies to improve maintainability and keep the service up to date.
  • Led preparations for the AWS Foundational Technical Review (FTR), reviewing the service’s implementation and operations against AWS best practices and addressing identified gaps. Introduced regular reviews to support the continued operation of a robust service.
  • Coordinated preparations for service penetration tests and communicated with external vendors.

Sony Interactive Entertainment Inc. Link to heading

Software Engineer | Tokyo, Japan | November 2019 - October 2024 (5 years)

PlayStation Network Cloud Storage Service

  • Led the expansion of the server application as tech lead to provide cloud storage functionality for the PC platform.

PlayStation Network Trophy Service

  • Designed and developed functionality to identify web API client types and aggregate client usage data in Datadog for monitoring and analysis.
  • Led the team’s infrastructure migration of the server application from Amazon ECS to Amazon EKS.
  • Implemented a new feature in the PlayStation App for iOS and Android as part of a full-stack engineering team.

Game Publishing System

  • Developed and maintained server applications for a game publishing system that manages game publishing workflows for game publishers and internal QA teams.

Technologies: Java, Python, AWS, Amazon Linux, Kubernetes, Docker, Terraform, Datadog, React Native

HENNGE K.K. Link to heading

Software Engineer | Tokyo, Japan | April 2010 - November 2019 (9 years 8 months)

Email Data Loss Prevention (DLP) Service

  • Designed and developed containerized server applications to analyze email content and attachments.
  • Designed and developed RESTful APIs to manage email statuses, history data, and user configurations.
  • Collaborated closely with support, consulting, and sales teams to discuss service improvements and address customer needs.
  • Operated microservices processing approximately 2.5 million emails per day.

Technologies: Go, AWS, Debian GNU/Linux, Docker, PostgreSQL, Nginx, CircleCI, Terraform, Vue.js

Technical Skills Link to heading

Programming Languages

  • Extensive professional experience (5+ years): Go, C, C++, Java, PHP
  • Professional experience: Python, TypeScript
  • Personal projects: Rust

Contacts Link to heading