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Susumu Tomita

Software Engineer

Building secure, scalable systems and engineering culture. From QA automation to cloud architecture, from startups to enterprise. Specializing in AWS, IoT, Web3, and developer experience.

LinkedIn GitHub Zenn Qiita

Key Achievements

First Cloud/IT Software Architect at DENSO (Software Sommelier Program)
Founded Cloud Tech Friends community (2,000+ engineers)
Built AWS GameDay training platform adopted company-wide
Published research on ZeroKey authentication system

Skills

Cloud & Infrastructure

7+ years
AWS GCP Azure Terraform AWS CDK Docker Kubernetes

Programming Languages

8+ years
Python TypeScript Go Ruby Solidity Cairo

CI/CD & DevOps

7+ years
GitHub Actions GitLab CI CircleCI Jenkins Bitbucket Pipelines

Security

5+ years
IAM SSO (Okta) JPKI Zero Trust Architecture Security Audits

QA & Test Automation

12+ years
JUnit Selenium TestNG REST Assured Test Planning

AI & Tools

2+ years
Claude ChatGPT Amazon Q Amazon Bedrock Slack Automation

Experience

DENSO Corporation

2026.2 - Present

Agile Coach (Contract)

Japan

  • • Supporting agile transformation and engineering culture improvement across development teams
  • • Coaching teams on Scrum, Kanban, and DevOps practices
  • • Facilitating retrospectives and continuous improvement initiatives
  • • Driving the "毎週工房" (Maishu Kobo) initiative — weekly product shipping culture every Friday at 14:00
Scrum Kanban DevOps Agile Coaching

DENSO Corporation

2018.10 - 2025.12

Software Engineer

Japan

  • • First certified Cloud/IT Software Architect under DENSO's "Software Sommelier" program
  • • Designed and operated AWS infrastructure for large-scale IoT services (mobi-Crews, Drive Agent Personal) managing 100K-1M devices
  • • Built Mac security environment using Jamf Pro, Okta, Druva, and Microsoft Defender
  • • Developed internal AWS GameDay training platform for security and cloud education
  • • Founded Cloud Tech Friends (CCoE) community with 2,000+ engineers across DENSO Group
  • • Established hiring processes and technical assessment criteria for cloud engineers, SREs, and architects
AWS Terraform Ruby on Rails Python Go TypeScript Docker GitHub Actions

Logomix Inc.

2025.6 - Present

Software Engineer (Lab Automation / SRE)

Remote (Freelance)

  • • Building fully automated iPS cell cultivation system for regenerative medicine research
  • • Integrating Hamilton STAR liquid handling robots with incubators and observation devices
  • • Implementing SRE practices: monitoring, incident response, and postmortem culture
Python HSL AWS Terraform GitHub Actions

MynaWallet Inc.

2025.8 - Present

Software Engineer (Web3 / Infrastructure)

Remote (Freelance)

  • • Infrastructure design and security audit support for Web3 wallet using Japan's JPKI (Public Key Infrastructure)
  • • Built cloud architecture for cryptographic signing, authentication, and CRL/OCSP verification
  • • Implemented workflow automation with AWS Step Functions and ECS for signature request processing
  • • Led JPKI certification audit preparation and ISMS/key management compliance
TypeScript AWS CDK ECS Step Functions Lambda Aurora Docker

WHILL Inc.

2021.9 - 2022.4

Software Engineer (Mobility Platform)

Remote (Freelance)

  • • Developed cloud application for wheelchair sharing service
  • • Built real-time data pipeline from wheelchairs to cloud using SORACOM Beam and AWS Lambda
  • • Created GraphQL API with AWS AppSync for real-time wheelchair status monitoring
  • • Prototyped wheelchair-elevator integration with OTIS systems
TypeScript Express AWS AppSync DynamoDB AWS CDK SORACOM

Hitachi Vantara

2017.2 - 2018.8

Specialist Software QA / Automation Engineer

Japan / US (Santa Clara, Seattle, Boston, Denver)

  • • QA and test automation for Lumada IoT platform
  • • Designed test plans and automation frameworks for data visualization modules
  • • Led proof-of-concept connecting Lumada with Hitachi industrial printers
  • • Contributed to establishing development culture and software processes from project inception
Java TestNG Selenium REST Assured Jenkins GitLab CI

Hitachi, Ltd.

2006.4 - 2017.1

QA Engineer / Technical Lead

Japan / US

  • • QA for JP1 Performance Management (server monitoring software) used in mission-critical systems (banking ATMs, railway IC cards, stock trading)
  • • Principal QA Engineer at Hitachi Data Systems for storage management software (80%+ test automation)
  • • Led Japan-side development and QA teams for UCP Director (unified infrastructure product) with US teams
  • • Established QA processes and test automation frameworks from scratch
Java JUnit Silk Test Jenkins Visual Studio Git SVN

Certifications

AWS Solutions Architect

Amazon Web Services