Short Ruby Newsletter - edition 166

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Table of Contents

1. 🚀 Launches and discounts

2. 📅 Events

3. 👉 All about Code and Ruby

4. 💼 Jobs

5. 🧰 Gems, Libraries, Tools and Updates

6. 🤝 Related (but not Ruby-specific)

7. More content: 📚 🗞 🎧 🎥 ✍🏾

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🚀 Launches and discounts

🚀 RubyConf launched the The Ruby Runway - Pitch live, gain exposure, and compete for exclusive cash prizes at RubyConf. Deadline is February 28, 2026 at 11:59PM ET

🚀 Javier Cervantes launched the RubyForum.org - “a new space for people who learn, use, and care about Ruby to ask questions, share resources, and have thoughtful discussions about the language and its ecosystem”

📅 Events

📅 helsinkiruby.fi announced the date for this year event. For more details, check their site for more details → TinyRuby.fi

📅 Tropical.Rb announced an update about their lineup

👉 All about Code and Ruby

💻 Code Samples

️💻 Andrzej Krzywda shared a code sample from Chaotic Job gem

️️💻 James Kerr shared how safe_join allows a tag as a divider

💻 Joel Drapper shared about a new feature in Phlex

️️💻 Karol Bąk shared how to add custom metrics and observability to any code with ActiveSupport

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📐 Thinking about Code Design

️️📐 Charles Oliver Nutter talked about Ruby’s keyboard arguments processing

️️📐 David Heinemeier Hansson shared about the work they made on Basecamp 5

️Also shared how he made the test suite that fast for Basecamp 5

📐 Nate Berkopec shared about the size of the Basecamp 3 and Hey codebases

️📐 Nate Berkopec shared how LLMs write loops like in C instead of using Enumerable!

️📐 Matt Swanson published his Cursor chat for building a new feature → LLM QuickGenerate model specification

️📐 Jankees shared about his learnings on AI coding agents. The skill mentioned in the post is available here → Test in Browser Skill

💡Around code (news, findings, books, and more - all about Ruby)

💡 Yaroslav Shmarov shared a script to use cloudflare tunnels for local developments:

💡 Peter Cooper shared about the migration of an old project to Rails 8.1 using Claude Code

💡 Prabin Poudel is preparing a new learning resource for testing Rails applications using Minitest

💡 Dmitry Pogrebnoy shared aboput the discussions on the official Ruby on Rails forum:

💡 John Nunemaker wrote about his problem with tests using the same database

Jeremy Smith also shared their Conductor Setup for Rails App 2026-01-31

❤️ Why Choose Ruby and Rails

❤️ Zain Fathoni shared he migrated his side project app from React Router V7 to Rails

💼 Jobs

This is a new section curated by Raul from CalmCompanies.club 

• Apple

  • Full Stack

    • Sr. Ruby on Rails Engineer, ASE ($181,100 - $318,400) - San Francisco, CA - Apply

• Better Stack

  • Full Stack

    • /^Full-?stack Engineer$/i ($60K - $300K/year + equity) - Remote (NAMER) or On-site (Prague, Czech Republic) - Apply

• BuildKite

  • ‼️ Application instructions: Fill out the application form with your name, email, resume, and cover letter.

  • Backend

    • Senior Engineer (Pipelines) (Salary not specified) - Australia, New Zealand - Apply

    • Senior Engineer (Test Engine) (Salary not specified) - Australia, New Zealand - Apply

  • DevOps

    • 🆕 DevOps Support Engineer ($95,000-$125,000) - United States - Apply

• Cactus

  • ‼️ Application instructions: Submit your resume at workoncactus.com Call with Maya, our AI assistant - (415) 360-3350 Write us why you are interested at [email protected]. Resumes are great but we’d love to see that you know how to write and can communicate effectively. Don't go overboard, under 500 words is more than enough. Call with CTO founder - assess background and technical alignment Onsite Interview to meet the team, including our CEO Ajith - (you get to know the company and we get to know you) Two-week paid work trial Offer

  • Full Stack

    • Senior Ruby on Rails + AI Engineer ($120K - $150K) - San Mateo, CA, US - Apply

• Circle

  • ‼️ Application instructions: Fill out the application form with your name, email, resume, and cover letter.

  • Infrastructure

    • Senior Back-End Software Engineer, Infra ($130K - $140K) - Remote - Apply

  • Full Stack

    • Senior Full-Stack Software Engineer, Applied AI ($130K - $140K) - Remote - Apply

    • Senior Full-Stack Software Engineer, CRM ($130,000 - $140,000 USD per year) - Remote - Apply

    • Senior Full-Stack Software Engineer, Live ($130K - $140K) - Remote - Apply

    • 🆕 Senior Full-Stack Software Engineer, CMS ($130,000 - $140,000 USD per year) - Remote - Apply

  • Platform

    • Senior Quality Platform Engineer ($120K - $130K) - Remote - Apply

    • 🆕 AI Platform Engineer, Applied AI ($130,000 - $140,000 USD per year) - Remote - Apply

• Evil Martians

  • ‼️ Application instructions: Don’t send us a standard CV. Send us an email to [email protected] with your full name as the email subject. The email must be in Russian. In your email: Your story. Tell us about your experience, interests, your previous projects, and your role (what did you do or achieve). Code showcase. As a starting point, we need to see some sample code. You can send us links to your GitHub projects or Pull Requests. You can also create (secret) GitHub Gists to send us code samples from your closed source projects: something that solves a non-obvious, advanced task, or examples of beautiful code. Ideally, you would also describe what the code does, include tests, and a general description of the feature or the problem relevant to the code. Location & relocation. Mention your current location and if you’re open to relocation. We do not hire in Russia.

  • Backend

    • Ruby Backend Engineer ($65K – $110K gross annual salary) - Remote (minimum of 3 hours daily overlap with the Pacific Timezone; relocation to Portugal possible) - Apply

🧰 Gems, Libraries, Tools and Updates

🆕 New Gems and Repos

🆕 Joel Moss announced a new gem → insertion - “PORO test fixtures for Rails“

🆕 Povilas Jurčys announced a new gem rubocop-rspec_parity - "A RuboCop plugin that provides custom cops to ensure RSpec test coverage parity and enforce RSpec best practices in your Ruby projects."

🆕 Valentino Stoll announced a new gem chaos_to_the_rescue - “Safe-by-default LLM-powered method generation and Rails error rescue suggestions.“

🆕 Alexey Poimtsev announced a new gem ffmpeg_core - "A clean, well-tested FFmpeg wrapper with modern Ruby conventions, proper error handling, and zero dependencies."

🆕 Alexey Poimtsev announced a new gem inertia_i18n - "Convert Rails YAML locales to i18next JSON, scan frontend code for translation usage, detect missing/unused keys, and check locale synchronization. Supports Svelte, React, and Vue frontends."

🧰 Updates

🧰 Hiroshi Shibata announced an update about RubyGems/Bundler

🧰 Stéphane Paquet announced an update for action-cable-online-status - “Rails 8 online status using Solid Cable and Hotwire Turbo Stream“

🧰 Bozhidar Batsov announced a new version of rubocop - “A Ruby static code analyzer and formatter, based on the community Ruby style guide.“

🧰 Any Cable announced a new release → 1.6.9

🧰 Yuri Sidorov announced an update on his template - “Lightweight Rails 8 template with all required SaaS features“. For more details check the blog post → How I Think About Building Rails Apps in 2026

🧰 Luis Lavena shared that now Ruby-4.0 is available in the Microsoft Store

🤝 Related (but not Ruby-specific)

🤝 Andrej Karpathy shared some thoughts on his experience coding with Claude. Here is just a part, check the full post on X

Boris Cherny replied with

🤝 Robby Russell shared a nice rule to integrate to mostly all LLMs

🤝 Nate Berkopec shared some thoughts on code refactoring by LLMs

🤝 Jeremy Smith shared how to use a gitignored CLAUDE.local.md in a project while still keeping it under version control

More content: 📚 🗞 🎧 🎥 ✍🏾

📚 Slides

📚 Andrzej Krzywda published his slides from RubyConf Thailand → 15 years with Rails and DDD (AI Edition)

📚 大倉雅史（Okura Masafumi）published his slides from RubyConf Thailand → Metaprogramming isn't real, it can't hurt you

🗞 Newsletters

🗞 This Week in Rails published a new edition → Disabled query cache in console and bugfixes

🗞 Matt Solt published a new edition → Ruby AI News - January 27th, 2026

🗞 Hotwire Weekly published a new edition → Week 04 - Optimistic UIs, Hotwire Native in-app purchases, and more!

🗞 Matt Solt published a new edition → Ruby AI News - January 27th, 2026

🗞 Ruby Weekly published a new edition → RubyConf’s 'Shark Tank' moment with The Ruby Runway

🗞 Women On Rails Newsletter published a new article about Newsletter WoR #69: AI won't solve all your problems, being human to avoid human error, and some games

🗞 Ruby Central published a new article about The Ruby Central README: January 2026

🎧 Podcasts

🎧 Joe Masilotti published a new podcast episode → Welcome to Permission Not Required

🎧 The Bike Shed published a new podcast episode → The Bike Shed Ep 491: Influences that shaped our thinking

🎧 The Ruby AI Podcast published a new episode → New Year, New Ruby: Agents, Wishes, and a Calm Ruby 4

🎧 Remote Ruby published a new episode → Blue Ridge Ruby 2026 with Jeremy Smith and Joe Peck

🎥 Videos

🎥 Jeremy Smith published a new video → Blue Ridge Behind the Scenes - Ruby Passports

🎥 Matt Diebolt published a new video → Today I dive into how user avatars work in Fizzy

🎥 Deanin published a new video → Absolute Beginners Guide to Deploying Rails 8 to Production (Kamal Tutorial)

🎥 Dave Kimura published a new video → Claude Code

✍🏾 Articles

What’s new 🆕

🆕 Mario Alberto Chávez published a new article about How I actually use AI to write Ruby on Rails code

🆕 Sam Ruby published a new article about Submitted for Your Approval

🆕 John Nunemaker published a new article about Conducting Rails

🆕 Jankees published a new article about Let Agents Test Their Own Work

🆕 David Backeus published a new article about #31 String#capitalize - 365 Reasons to Love Ruby

🆕 Svyatoslav Kryukov published a new article about Optimistic UI in Rails with optimism... and Inertia

🆕 Mohit Sindhwani published a new article about Ruby Tips 15 - Don't let UTC trip you up

🆕 Roman Samoilov published a new article about If Rails Was Designed Today: The Operational Monolith

🆕 Mike Mc Quaid published a new article about What happened to RubyGems and what can we learn?

🆕 Brad Gessler published a new article about Ruby Price objects for SaaS websites

How-TOs 📝

Andy Croll published a new article about Simple Tailwind CSS 4 Setup for Jekyll

Brooke Kuhlmann published a new article about Hanami with Rodauth

Simon Chiu published a new article about Monitor CSRF Attacks in Production with Rails Notifications

Joshua Wood published a new article about How to build a Copilot agent that fixes Rails errors

Marcin Ostrowski published a new article about The single most important thing that made me believe AI coding could work

Rails Designer published a new article about Creating a link-icon custom element

Giménez Silva Germán Alberto published a new article about Making Maps with Ruby

Mike Dalton published an article about Implementing OAuth in Hotwire Native apps with Bridge Components

Related ✍️

Scott Werner published a new article about The Different Shapes of "Think Before You Build" Prompting

Reni Mercier published a new article about Reflecting on 2025

Sean Goedecke published a new article about How does AI impact skill formation?