hoshino tsuyoshi

Tokyo, Japan

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Summary

🤩

Rockstar

Hoshino Tsuyoshi is a Tokyo-based Software Engineer with 11 years of experience specializing in Ruby/Rails and backend tooling. He is an active open-source contributor to RuboCop and rubocop-rails, where he improved Rails-specific cops, added autocorrect features, and made the analyzer compatible with Ruby’s safe navigation operator to reduce noisy offenses. His work on rubocop has helped harden static analysis and code formatting for a large portion of the Ruby community. He also contributes to k1LoW/awspec, adding a policy generator and tightening AWS resource checks, demonstrating practical DevOps and infrastructure-as-code testing skills. Known for a pragmatic, detail-oriented approach, he bridges developer ergonomics and secure, auditable infrastructure.

12 years of coding experience

Github Skills (21)

rubocop10

ruby-rails10

static-code-analysis10

testing10

rspec10

rails10

formatter10

formater10

ruby10

sql-formatter10

code-analysis10

aws10

formatters10

linter10

infrastructure-as-code10

Programming languages (10)

TypeScriptDockerfileShellJavaScriptElmGoHTMLVim script

Github contributions (5)

rubocop/rubocop

Apr 2017 - May 2019

A Ruby static code analyzer and formatter, based on the community Ruby style guide.

Role in this project:

Backend Developer

Contributions:39 commits, 9 PRs, 26 comments in 2 years 1 month

Contributions summary:Hoshino primarily contributed to the RuboCop project by improving the code analysis and formatting capabilities of the tool. Their work included adding autocorrect features to address specific code style issues like format strings, nested parenthesized calls, and safe navigation operator usage. They also enhanced the tool's ability to detect unreachable code and identify violations of Rails-specific best practices.

linterstyle-guidecode-formattercode-analyzerruby

rubocop/rubocop-rails

Feb 2019 - Mar 2020

A RuboCop extension focused on enforcing Rails best practices and coding conventions.

Role in this project:

Back-end Developer

Contributions:7 commits, 1 PR, 2 comments in 1 year 1 month

Contributions summary:Hoshino contributed to the `rubocop-rails` project by enhancing existing RuboCop cops to be compatible with the safe navigation operator (`&.`). Their commits modified multiple files related to specific Rails-related code style rules. This work included updating the specification files and the cop logic, focusing on `ActiveRecordAliases`, `Date`, `DynamicFindBy`, `FindBy`, `SaveBang`, and `SkipsModelValidations` cops. These changes aimed to improve the accuracy and functionality of RuboCop's static code analysis within the Rails ecosystem.

lintercoding-conventionsrailscode-formatterruby

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