On Rails
On Rails
Podcast Description
On Rails invites Rails developers to share real-world technical challenges and solutions, architectural decisions, and lessons learned while building with Rails. Through technical deep-dives and retrospectives with experienced engineers in the Rails community, we explore the strategies behind building and scaling Rails applications.Hosted by Robby Russell of Planet Argon.
Podcast Insights
Content Themes
The podcast covers topics such as architectural decisions, technical challenges, and lessons learned in Rails development. Examples of specific episodes include discussions on the transition from Resque to Solid Queue by 37signals, the best practices for handling recurring and long-running jobs, and insights into system design, reliability, and maintainability in Rails applications.
On Rails invites Rails developers to share real-world technical challenges and solutions, architectural decisions, and lessons learned while building with Rails. Through technical deep-dives and retrospectives with experienced engineers in the Rails community, we explore the strategies behind building and scaling Rails applications.
Hosted by Robby Russell of Planet Argon and produced by the Rails Foundation.
In this episode of On Rails, Robby is joined by Brian Scanlan, Senior Principal Engineer at Intercom, where a 15-year-old Rails monolith with millions of lines of code sits at the heart of the business.
Brian shares how Intercom's philosophy of being ”technically conservative” has kept their engineering organization productive and focused on shipping product rather than managing infrastructure complexity, and on Intercom's all-in bet on Claude Code as their singular AI tool, now generating over 95% of daily code, with over 1,000 weekly users across the company including non-engineers in sales, marketing, and finance. Brian explains their approach to automated code review and PR approvals, how they built a Rails console MCP that lets Claude run production queries (with non-engineers as the top users), their layered plugin and skills architecture, and where AI still falls short in open-ended debugging, using the metaphor of commercial airline pilots who know when to disengage the autopilot.
Tools & Libraries Mentioned
- Claude Code — AI coding agent (mandated tool at Intercom) — https://docs.anthropic.com/en/docs/claude-code/overview
- Rotoscope — Shopify's tool for identifying test subsets — https://github.com/Shopify/rotoscope
- Honeycomb — Observability and tracing — https://www.honeycomb.io/
- RuboCop — Ruby linting and static analysis — https://rubocop.org/
- Snowflake — Cloud data warehouse — https://www.snowflake.com/
- Datadog — Monitoring and metrics — https://www.datadoghq.com/
- GitHub Dependabot — Automated dependency updates — https://github.com/dependabot
- Console1984 — Rails console audit trail gem — https://github.com/basecamp/console1984
- Playwright — Browser automation (mentioned re: token consumption) — https://playwright.dev/
Books Mentioned
- Designing Data-Intensive Applications by Martin Kleppmann
Blog Posts Mentioned
- Choose Boring Technology by Dan McKinley — https://mcfunley.com/choose-boring-technology
On Rails is a podcast focused on real-world technical decision-making, exploring how teams are scaling, architecting, and solving complex challenges with Rails.
On Rails is brought to you by The Rails Foundation, and hosted by Robby Russell of Planet Argon, a consultancy that helps teams modernize their Ruby on Rails applications.
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