Kazuhiro Oinuma
Software Engineer at Mercari, Inc.
Chiyoda, Japan
Summary
👤
SeniorKazuhiro Oinuma is a seasoned software engineer with 16 years of experience delivering scalable web applications and microservices, currently contributing at Mercari. He specializes in high-throughput Go services (handling 2,000+ req/sec), monolith-to-microservices migrations, and pragmatic schema design for MySQL, with hands-on AWS/GCP infrastructure work. As a tech lead, he balances business KPIs with engineering quality, authors team docs and on-call guidance, and champions rigorous code review to boost delivery cadence. He has a history across prominent Tokyo tech firms (Mercari, CyberAgent, mixi) and maintains an active open-source presence, including projects like tomahawk and lekcije. Colleagues describe him as a practical engineer who blends low-level concurrency expertise with team-level process improvements.
16 years of coding experience
21 years of employment as a software developer
English, Japanese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (106)
revel10
go10
react10
atlas9
entity9
aurora9
milestone9
go-language9
web-application9
nextjs9
bindata8
migrate8
entity-framework8
ubuntu8
vms8
Programming languages (5)
Github contributions (5)
oinume/lekcije
Mar 2016 - Jan 2023
Follow your favorite teachers in DMM Eikaiwa
Contributions:1 review, 3036 commits, 1540 PRs in 6 years 10 months
dmm-eikaiwareactdmmfollowscraping
oinume/grpc-sample
Mar 2018 - Apr 2019
gRPC and gRPC gateway sample
Contributions:41 commits, 16 PRs, 31 pushes in 1 year 1 month
grpc-gatewaygrpcgrpc-javagateway
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