Engineering Director - Ruby and Rails Infrastructure team @shopify. Opinions are my own.
Joined August 2015
- Tweets 608
- Following 701
- Followers 1,556
- Likes 851
63 Photos and videos
Pinned Tweet
29 Nov 2024
Black Friday is here - let that globe light up! This time with Shoppy, music, colors of your choice, nerdy stats - with gravity or without!
Bfcm.shopify.com @Shopify #BFCM #shopify
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Gabi Stefanini retweeted
Jun 2
Entrepreneurship has no zip code.
@Shopify merchants outside major cities generated $2.9 billion in cross-border sales last year. Up 342% since 2019.
And new shop creation outside metro areas is rising in every country we tracked.
Ambition used to need an address. Now it just needs an internet connection.
shopify.com/news/rural-comme…
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Gabi Stefanini retweeted
May 13
This year the #RailsWorld 2026 CFP closes on Saturday, May 16, at 23:59 pm Central (Austin) time, and we will strive to inform speakers as quickly as possible if they are accepted (or not). The committee is looking forward to reviewing your submissions! sessionize.com/rails-world-2…
ALT Rails World logo with neon border and text: Reminder: CFP closes on May 16. Austin Texas. September 23-24, 2026.
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Gabi Stefanini retweeted
As a blind programmer, this is one of the most meaningful things I've worked on!
I'd love your thoughts on the PR, especially if you've never thought about a11y. People new to it catch what I could be taking for granted.
Thanks to the Rails Foundation for the trust ❤️
May 7
New in the Rails docs: The Rails Accessibility Guide covers everything you need to build inclusive apps: semantic HTML, ARIA, screen reader behavior, keyboard navigation, and legal requirements like WCAG 2.2.
Written by @brunoprietog, commissioned by the Rails Foundation, and ready for your input. If you have experience in making Rails apps more accessible and want to help others do the same, please review the PR here: github.com/rails/rails/pull/…
ALT Rails logo with text: New documentation PR open for community review: Accessibility Guide
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Gabi Stefanini retweeted
Apr 19
This Week in Rails:
A new `rails query` command lands: run read-only ActiveRecord queries from the command line and get structured JSON output with columns, rows, pagination metadata, query time, and generated SQL. Subcommands include `query schema`, `query models`, and `query explain`.
Also: static CSS and HTML files now include `charset=utf-8` in Content-Type, new Rails apps get a PWA offline fallback page, and ParameterFilter gains O(1) hash lookup for exact-match regexp filters.
Read all that and more in this week's newsletter: rubyonrails.org/2026/4/17/th…
ALT This Week in Rails logo with the text: Query command for database queries and more
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Gabi Stefanini retweeted
Mar 5
Ruby on Rails scales from PROMPT to IPO. Token-efficient code that's easy for agents to write, and still beautiful for humans to review. rubyonrails.org
ALT Screenshot of updated Ruby on Rails website with bold text: Accelerate your agents with convention over configuration. Ruby on Rails scales from PROMPT to IPO. Token-efficient code that's easy for agents to write, and beautiful for humans to review.
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Gabi Stefanini retweeted
Mar 5
I benchmarked which language works best with Claude Code. Ruby, Python, and JavaScript came out cheapest,
fastest, and most stable!
See my article in detail: dev.to/mame/which-programmin…
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Convention over configuration set the path for 20 years of great training data for AI to use today. Not only does this mean agents do great with Rails, but also that squishy humans can quickly and confidently review the output without a jungle of distracting boilerplate.
I think people are sleeping a bit on how much Ruby on Rails Claude Code is a *crazy unlock* - I mean Rails was designed for people who love syntactic sugar, and LLMs are sugar fiends.
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Gabi Stefanini retweeted
Jan 22
We've upgraded Todos => Tasks to help Claude complete longer projects
Let us know if you have any feedback!
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Gabi Stefanini retweeted
Jan 21
Looking forward to trying this one out!
Cursor's visual editor was a miss. We have tried WYSIWYG HTML editors for decades, they never worked, and it isn't an AI problem.
Figma showed the way to go and Pencil builds on that with an open file format and agent-aware extensions.🚀
Excited to launch Pencil
INFINITE DESIGN CANVAS for Claude Code
> Superfast WebGL canvas, fully editable, running parallel design agents
> Runs locally with Claude Code → turn designs into code
> Design files live in your git repo → Open json-based .pen format
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Gabi Stefanini retweeted
Jan 23
Every new business eventually hits a wall.
The great ones build ladders.
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Jan 23
There's been a massive spike in sales emails that get basic details wrong, like the company I work for, *to my business email*. That's poor strategy *and* execution. Latest one was selling me a product so I can manage "my international team @37signals" (@dhh forwarding that to you lol jk).
For all sales folks out there: please do better. That's an immediate pass for me, doesn't matter what you're selling.
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Gabi Stefanini retweeted
Jan 11
Shopify is building the foundation for agentic commerce.
Universal Commerce Protocol, which we co-developed with Google, is now live. UCP will make it faster for agents and retailers to integrate.
It’s open by default, so platforms and agents can use UCP to start transacting with any merchant. Major retailers are already using it.
Agents can handle everything from discovery to fulfillment, and support things like discounts, subscriptions, and loyalty programs. We’ve accounted for all types of commerce.
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Gabi Stefanini retweeted
23 Dec 2025
Ruby's new identity statement caught my attention:
"A language where people gather, a site where people are visible."
Source: ruby-lang.org/en/news/2025/1…
ALT Dark rounded rectangle with white paragraph text about Ruby's redesigned site identity, set against a purple-to-pink gradient background.
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Gabi Stefanini retweeted
24 Dec 2025
Ruby 4.0 is here! New ZJIT compiler, Ruby::Box namespaces, redesigned Ractor API, and Set is now a core class. Check out what's new #Ruby #Ruby4 #RubyLang #Programming #WebDev #OpenSource
blog.saeloun.com/2025/12/24/…
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Gabi Stefanini retweeted
24 Dec 2025
The official Ruby documentation site is also renewal at this year. ruby-lang.org/en/news/2025/1…
Thanks @_st0012 !
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#rubyrelease30th I’d like to introduce Aliki, RDoc and docs.ruby-lang.org’s new theme 😄
railsatscale.com/2025-12-22-…
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Gabi Stefanini retweeted
22 Dec 2025
I published the context and concept for redesigning ruby-lang.org. ruby-lang.org/en/news/2025/1…
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