Software Engineer

Building the future of
Web3 & Cloud Infrastructure

I'm Susumu Tomita, a Software Engineer based in Japan with 18+ years of experience. I specialize in blockchain research, cloud architecture at scale, and building engineering communities.

2 books · 3 editions

Published Technical Books

Hands-on books built from working repositories, reproducible steps, and the same review discipline used for software.

How I write them →
Cover of Zig言語で学ぶブロックチェイン

Zig · Blockchain · EVM

Zig言語で学ぶブロックチェイン

Build a blockchain, P2P networking, chain synchronization, and a minimal EVM from scratch in Zig.

Cover of 自分で作るクラウド競技
Cover of Build Your Own Cloud Competition

AWS · GameDay · TenkaCloud

Build Your Own Cloud Competition

Design, build, and run GameDay-inspired AWS Challenges and Battles with TenkaCloud. Published in Japanese and English.

18+
Years Experience
2,000+
Engineers in CCoE
1M+
IoT Devices Managed
80%+
Test Automation

Trusted by leading companies

DENSOHitachiWHILLLogomixMynaWallet

Recent Posts

View all →

Explore More

Let's Build Something Together

クラウド基盤の構築、コーポレートドメイン・ID移行、IaC・監視・非機能設計を、設計から実装・運用改善まで一気通貫で支援します。 アーキテクチャレビューや技術アドバイザリーからのご相談も歓迎です。

Cloud foundations, corporate domain & identity migration, IaC, observability and non-functional design — from design to implementation and operations.

View Cover Letter →