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@sivchari

Takuma Shibuya

sivchari
Asia/Tokyo

Hi, I'm Takuma Shibuya (sivchari)

I'm a software engineer based in Tokyo, working on open source across the Go and Kubernetes ecosystems.

What I build and maintain

  • kumo — a lightweight AWS service emulator written in Go
  • govalid — type-safe, code-generated struct validation for Go
  • gomu — a high-performance mutation testing tool for Go

Community work

  • Maintainer for Cluster API and Kube API Linter
  • Main organizer of Go Conference and golang.tokyo

Why sponsor me?

Almost all of my open source work happens in my personal time. Your sponsorship directly funds the time I spend maintaining these projects — triaging issues, reviewing PRs, and shipping new features — and helps keep Go community events running.

Thank you for your support.

4 sponsors have funded sivchari’s work.

@sivchari

I'll be able to cover my server costs once I'm sponsored for $10 each month!

@lunarxlark
@1uf3
@harukitosa
@github

Featured work

  1. kubernetes-sigs/cluster-api

    Home for Cluster API, a subproject of sig-cluster-lifecycle

    Go 4,337
  2. sivchari/kumo

    A lightweight AWS service emulator written in Go

    Go 1,502
  3. kubernetes-sigs/kube-api-linter

    KAL - The Kube API Linter

    Go 141
  4. sivchari/gomu

    High-performance mutation testing tool for Go

    Go 46

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$ a month

You'll receive any rewards listed in the $1 monthly tier. Additionally, a Public Sponsor achievement will be added to your profile.

$1 a month

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Thank you for supporting my open source work. Every dollar helps cover the infrastructure costs behind my projects.

  • Sponsor badge on your profile
  • My sincere gratitude

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$25 a month

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For heavy users of my tools such as kumo, govalid, and gomu. You rely on them for daily work, and I will do my best to keep them reliable for you.

  • Priority attention on your issues and questions (best effort)
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$100 a month

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For companies using my tools in production. Your support directly funds maintenance time: triaging issues, reviewing PRs, and shipping new features.

  • Priority attention on your issues and questions (best effort)
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