cyrilrohr · founder

Cyril Rhr

Founder of RunsOn. Developer of fine Dev/Ops tooling.

Rennes, France · open to advisory & CTO sparring

Get in touch GitHub
01projects

Tooling, for developers.

10 years building side-projects on the side.

flagship · actively building

RunsOn

10× cheaper, self-hosted GitHub Actions runners — running on your own AWS account, fully managed and faster than the defaults.

runs-on.com

PullPreview

maintained

Ephemeral preview deployments for every GitHub pull request — spun up on demand, torn down on merge.

pullpreview.com

Packager

maintained

Automatic DEB & RPM package generation for any application — clean, reproducible distribution builds.

go.packager.io
02stack

Tech I reach for.

Boring where it counts, sharp where it matters — plus enough ML/AI to be dangerous.

Dev

  • Ruby (Rails)
  • Go
  • Node.js (Astro)

Ops

  • PostgreSQL
  • Grafana
  • Prometheus
  • Kubernetes

Infra

  • Cloudflare
  • AWS
  • GitHub Actions
  • Hetzner

ML / AI

  • OpenAI / Anthropic
  • self-hosted models
03advisory

Available to advise.

My focus is on building RunsOn now — but I'm glad to come in as a CTO-style advisor or sparring partner for teams working on the hard infrastructure parts.

// track record
$15k→$2.5k

Monthly AWS bill, −83%. Plus a proper platform on top: build, test, deploy & monitor — with a CI system the team actually trusts.

  • 01CI/CD & GitHub Actions — pipelines, runners, speed & cost.
  • 02AWS infrastructure — architecture reviews, cost reduction.
  • 03Ruby on Rails — architecture, scaling, real-time, performance.
  • 04Legacy migrations — de-risking big upgrades with tests & CI.
  • 05Kubernetes & Docker — when (and when not) to reach for them.
  • 06AI/ML tooling — whisper.cpp, OpenAI, self-hosted llama & mistral.
  • 07SSO & auth — choosing and rolling out the right approach.
  • 08ElasticSearch — indexing, aggregations, reporting.
04about

I spent over a decade as a freelance Ruby on Rails & CI/CD consultant (since 2013). These days my focus is building RunsOn — and I'm happy to advise teams, CTO-style, on the hard infrastructure parts.