Yoichiro Shimizu
Tech Lead 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.
12 years of coding experience
13 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 (19)
Github contributions (5)
pingcap/tidb
Oct 2021 - Nov 2021
TiDB - the open-source, cloud-native, distributed SQL database designed for modern applications.
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.
ai-poweredtidbserverlesshtapreal-time
budougumi0617/leetgode
Sep 2020 - Oct 2020
LeetCode CLI for Gophers. This CLI can generate a skeleton code with test code.
Contributions:2 releases, 78 commits, 7 PRs in 1 month
golangleetcodeskeletonleetcode-clicli
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