Yoichiro Shimizu
ソフトウェアエンジニアリングマネージャー at LayerX
Kawaguchi, Japan
Summary
👤
Senior🎓
Top SchoolYoichiro Shimizu is a seasoned tech lead with 12 years of experience building cloud-native services and migrating legacy systems to modern stacks, currently leading engineering at LayerX in Kawaguchi, Japan. He is fluent in Go, PHP, and Python, and has deep hands-on experience with microservices, gRPC, OAuth2 integrations, and containerized deployments on EKS. His open-source contributions include test infrastructure refactors for the widely used TiDB distributed SQL database, showing a knack for improving testability and reliability in complex systems. Prior roles include technical leadership at BASE and feature work modernizing desktop applications to Xamarin.Mac and UWP, reflecting a pragmatic full-stack background from embedded C/C++ to backend cloud services. Known for systematic problem-solving and a strong testing-first mindset, he also shares technical insights on his blog and GitHub.
13 years of coding experience
15 years of employment as a software developer
修士, 数理電子情報系専攻, 修士, 数理電子情報系専攻 at 埼玉大学
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
databases10
go10
database10
test-automation10
testing10
sql9
mysql8
distributed-database7
cloud-native6
Programming languages (20)
Github contributions (5)
pingcap/tidb
Oct 2021 - Nov 2021
TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:5 reviews, 5 commits, 2 PRs in 1 month
Contributions summary:Yoichiro's commits primarily focus on migrating test infrastructure to the `testify` testing framework and refactoring existing test code across multiple files within the `executor/aggfuncs` directory. This involved updating test functions for various aggregate functions such as `max`, `min`, `sum`, `avg`, `count`, and `percentile`. The changes include refactoring tests, adapting existing test cases to the new testing framework, and ensuring functionality through tests.
agentictidbvector-searchdistributed-databasedistributed-transactions
budougumi0617/tasks
Dec 2016 - Sep 2021
Create Task List Comments from files by Golang.
Contributions:1 release, 16 PRs, 39 pushes in 4 years 9 months
golangcommentstask-listgo
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