On Rails

In this episode of On Rails, Robby is joined by Aaron Patterson, better known online as Tenderlove, a senior staff engineer on Shopify’s Ruby infrastructure team and a longtime contributor to both Ruby and Rails Core. Aaron and Robby chat about how Ractors are finally bringing true multi-core parallelism to Ruby, the proposal Aaron has pitched to RubyGems.org for content addressable gems that could make bundle install dramatically faster, and the real reasons gems reach for native C extensions in the first place.
They also have a candid conversation about how Aaron actually uses AI day to day, from digging through unfamiliar code at Shopify's scale to building a JPEG encoder almost entirely with Claude, and why he still can't quite bring himself to trust it the way he trusts a longtime teammate.
Links
Tenderlove
Shopify
Ractors
RubyGems.org
FFI 
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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.

In this episode of On Rails, Robby is joined by Bryce Harlan, a senior engineer at Phamily, the text-based chronic care management platform built by Jaan Health. Bryce has spent the last decade helping evolve Phamily's Ruby on Rails platform, which helps clinical practices coordinate between-visit care for patients with chronic conditions — sending and receiving roughly 100,000 Twilio SMS messages a day across hundreds of medical groups.
Bryce and Robby trade stories about a long-lived Rails app: the unconventional Rails 4-to-6 leap Phamily made during the spring 2020 surge in virtual care, the bespoke "Action Responders" pattern the team built to keep API serialization, authorization, and testing close to the model layer, and how an article from Judoscale on naming Sidekiq queues by their SLA reshaped how the team thinks about background work. They also dig into how Phamily is using Claude Code skills to give engineers "superpowers" on smaller features, and why Bryce now sees test suites as the closest thing to Peter Naur's idea of programming as theory building.
Links:
Phamily
Jaan Health
Programming as theory building
Judoscale blog: Planning Sidekiq Queues
Send us Fan Mail
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.

Robby is joined by Nikky Southerland, Lead Software Engineer at Shop-Ware — a cloud-based platform that helps independent automotive service shops run their businesses. Ruby on Rails has powered Shop-Ware since the first line of code was written back in 2013, and more than a decade later the codebase is still 90%+ Rails.
Robby talks with Nikky about what it actually takes to keep a mature Rails app moving with a team roughly half the size it used to be, including a frontend migration that's still in progress, the API decision they regretted almost immediately, and the LaunchDarkly kill switches that save them when a third-party integrator goes down.

Send us Fan Mail
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.

David Heinemeier Hansson, creator of Ruby on Rails and co-owner of 37signals⁩, joins Robby Russell the same week 37signals shipped Basecamp 5 to talk through the shift reshaping how software actually gets built today: why he reversed his "write every character by hand" stance, why he now considers taking AI seriously a professional obligation, and how cheap experimentation ("git reset and try again") is changing 37signals from the inside: designers and PMs working directly in code, and even the rigid six-week Shape Up cycle up for reconsideration. 

They also trace the history of Rails, including a backend so stable that a model file written today looks at home next to one from 2013, and take a peek at what's headed for Rails, from a Lexical-based editor ("Lexi") headed for ActionText to native passkeys and magic links. 

If you're curious where Rails is headed, have a listen.

Send us Fan Mail
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.

Tom Rossi, co-founder of Higher Pixels and the team behind Buzzsprout, joins Robby to talk about what it really looks like to stay "as Rails as possible", purely out of pragmatism. With over 472,000 podcasts on the platform and a team of fewer than ten people, Tom explains how sticking to vanilla Rails has been the foundation of Buzzsprout's ability to move fast, stay lean, and keep up with a rapidly evolving industry.
In this episode, Tom walks through Buzzsprout's migration from Paperclip to Active Storage (including what broke spectacularly in production), their recent shift from hand-rolled summary tables to ClickHouse for analytics, and how Hotwire made building the Buzzsprout mobile app surprisingly manageable. He also shares how Buzzsprout's real-world scale, including the monkey patching that resulted from it, led directly to contributions back upstream into Rails itself.
Higher Pixels: https://www.higherpixels.com
Buzzsprout: https://www.buzzsprout.com
Buzzsprout Blog: https://www.buzzsprout.com/blog
Tick (time tracking): https://www.tickspot.com
Donor Tools: https://www.donortools.com
StreamCare: https://www.streamcare.com
Higher Pixels joins the Rails Foundation: https://rubyonrails.org/2025/2/18/higher-pixels-joins-foundation
Send us Fan Mail
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.