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Rails Made My Hobby Profitable
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Miha Rekar
September 05, 2025
Programming
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47
Rails Made My Hobby Profitable
Lightning talk I gave at Rails World 2025 about
https://visualizer.coffee/
Miha Rekar
September 05, 2025
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Transcript
Miha Rekar, mr.si Rails Made My Hobby Profitable
2012 PHP developer hacker Working for a “digital ad agency”
Hate coffee
2013 Coworker recommended a book
2013 Coworker recommended a book Discover Ruby and Rails
2013 Coworker recommended a book Discover Ruby and Rails Apply
for RailsConf Opportunity Scholarship
2013 Coworker recommended a book Discover Ruby and Rails Apply
for RailsConf Opportunity Scholarship Explore Portland
2013 Coworker recommended a book Discover Ruby and Rails Apply
for RailsConf Opportunity Scholarship Explore Portland Have my first specialty coffee
Coffee Setup Started with Aeropress and Baratza grinder
Coffee Setup Started with Aeropress and Baratza grinder Upgradeitis Espresso
machine
Coffee Setup Started with Aeropress and Baratza grinder Upgradeitis Espresso
machine EK43
Coffee Setup Started with Aeropress and Baratza grinder Upgradeitis Espresso
machine EK43 Decent
Scratching my own itch First commit a couple of hours
after getting the machine No persistence, just a Ruby parser on Heroku and Chart.js People loved it but wanted to share GitHub sponsorship
January 2021 v2 Over 100 registered users and over 4,000
uploaded shots Hotwire Tailwind
January 2022 Freemium SaaS Over 1,200 users and over 200,000
uploaded shots GitHub sponsors not a great fit Stripe subscriptions 5€/month or 50€/year Migrated to Fly Docker
December 2023 v4 A ton of updates all the time
This was a big one Comissioned a logo on Fiverr All in on Hotwire Pagy Out, Turbo In radan.dev
Turbo Broadcasts No custom JS It Just Works™ "
Rails World 2023 —> March 2024 Solid Queue Using Sidekiq
Unless you’re paying for pro, it’s quite unsafe Redis on Fly # Impressed by Rosa’s work but needed scheduling Minutes after merging Visualizer was running it
Minimal work, maximal effect Rails 8 Live in production with
beta 1 Devise to Rails Auth (another post on radan.dev) Solid Cable Solid Cache Redis $ Thruster Trigram indexes
October 2024 Kamal 2 The Fly experience How hard could
it be? ~35 GB Postgres DB 6 min downtime Massive speedup on Hetzner ARM Full Stack DevOps
Can’t have a talk in 2025 without mentioning AI, right?
AI Nokogiri Claude API Couple of lines of Ruby Populate all the coffee info
January 2025 Push Notifications PWAs were all the rage again
Using ServiceWorker Inspired by Campfire source code (not the new Action Native Push)
[This Slide Intentionally Left Blank] Rails 8.1
Stats
Thank you Rails!