Masaki Hara
Software Engineer at Wantedly Inc.
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolMasaki Hara is a Tokyo-based software engineer with 15 years of experience, currently building product and platform at Wantedly. He brings deep backend and DevOps expertise—improving CI/CD, cross-compilation, and dependency integrations across notable open-source projects like protobuf, Renovate, and Dependabot. Comfortable across the stack, he also contributes TypeScript typings for React ecosystems and has refined contest systems and a functional typesetting parser, showing both practical product focus and language/tooling craftsmanship. His work often centers on build automation, portability (including arm64), and type safety, making developer workflows more reliable. A University of Tokyo computer science master, he selectively accepts outreach via Wantedly or AtCoder Jobs rather than email.
15 years of coding experience
University of TokyoSenior High School at Komaba, University of Tsukuba
Stackoverflow
3,435reputation
109kreached
23answers
2questions
subprocess
top-5%
rust
top-5%
Github Skills (55)
dependency-manager10
dependency-management10
programming-language10
docker10
dependabot10
package-management10
back-end-development10
python10
dependency-analysis10
rubygems10
typescript10
typescript-definitions10
styled-components10
dockers10
cicd10
Programming languages (18)
Github contributions (5)
protocolbuffers/protobuf
Feb 2019 - May 2024
Protocol Buffers - Google's data interchange format
Role in this project:
DevOps Engineer & Automation Engineer
DevOps Engineer & Automation EngineerContributions:11 PRs, 40 comments, 1 issue in 5 years 3 months
Contributions summary:Masaki primarily focused on improving the build and testing infrastructure for the project. Their contributions involved modifying build scripts, Docker configurations, and CI/CD pipelines to support various Ruby versions and architectures, including arm64. They also implemented changes related to Ruby extension building and cross-compilation, indicating a focus on automating the build process and ensuring compatibility across different platforms.
protocol-buffersrpcgoogle-protocol-buffersinterchange-formatmarshalling
cms-dev/cms
Mar 2013 - Mar 2017
Contest Management System
Role in this project:Back-end Developer
Back-end DeveloperContributions:25 commits, 12 PRs, 22 comments in 4 years
Contributions summary:Masaki primarily contributed to the contest management system's back-end functionality, focusing on adapting existing code and implementing new features related to task types and grading. They modified core components such as the YAML importer, communication task handling, and output-only task evaluation. Additionally, the user addressed bugs related to score calculation and the submission list page's layout, indicating a focus on improving system correctness and user experience. Furthermore, the user made enhancements to the scoreboard and user interface.
management-systemprogramming-competitionspythongrading-systemcontest-management-system
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