# Mix & Go > Mix & Go is Cezar Halmagean's studio: agentic engineering for Ruby on Rails teams, and YouTube programs that help devtools companies reach developers. ## Overview Mix & Go offers two services. Cezar Halmagean has spent 18 years building software (tech lead at RepairPal, scaled to 3M+ monthly users), has trained 160+ Rails developers, speaks at Rails Global Summit and RubyConf, and has taught developers through the Mix & Go YouTube channel for over a decade. ## Services ### Agentic Engineering for Rails Teams (https://mixandgo.com) For CTOs and founders of Ruby on Rails teams who already use AI but aren't seeing the roadmap move faster. Cezar sets up fleets of AI coding agents in the team's codebase: several agents working in parallel, each with one clear job and the team's conventions, with tests and review on every change, and the team's engineers steering. Ruby on Rails is his home stack, with production experience going back to 2008. - Starts with a one-week build sprint: $5,000 fixed price. An agent setup for the repo, one real feature shipped fully tested and ready to merge in 5 business days, a walkthrough call with the team, and 30 days of email support. Full refund if the client isn't happy with it. - Then One Big Project: from $20,000, fixed price. The project that's been stuck on the roadmap (a Rails upgrade, a legacy rewrite, a big feature nobody wants to start), shipped with the fleet, scoped and priced up front. - Or Head of AI Engineering: from $15,000/mo, part-time, month to month. Cezar leads the team's AI engineering, ships work through the fleet alongside the engineers, and reviews the PRs. - Also available: an independent second opinion on the codebase and the team's agent workflow, $3,500, with a report within 5 business days. ### YouTube for Devtools and APIs (https://mixandgo.com/youtube) For devtool and API companies whose buyers are developers. Mix & Go builds YouTube videos that answer the exact searches developers make, so the company shows up before they have shortlisted anyone. An engineer builds and records the real thing first, and nobody on the client's team goes on camera. The channel, videos, and code belong to the client. - Pilot: $2,000, fully refundable within 7 days, credited toward the first month - Program: $6,000/month for four videos, with topic research, production, publishing and SEO, docs placement, tracked attribution to signups, and library upkeep - Full pricing: https://mixandgo.com/youtube/pricing ## Main Sections ### Pricing https://mixandgo.com/youtube/pricing - A $2,000 pilot, fully refundable, then $6,000/month for four YouTube videos. Here's exactly what that buys and how it compares to a DevRel hire or a written-content agency. ### Guides https://mixandgo.com/guides/devtool-video-agencies - A fair comparison of Videodeck, Draft.dev, Infrasity, Plug.dev, and Mix & Go for devtool companies deciding how to invest in video and YouTube content. https://mixandgo.com/guides/youtube-for-devtools - What a YouTube channel actually does for a devtool company, where it's strong and where it isn't, and the eight-part strategy for running one that turns into signups instead of a library nobody watches. ### Comparisons https://mixandgo.com/vs/creator-programs - Creator programs like Plug.dev place your product with independent YouTubers who have their own audience and brand. Mix & Go builds a channel you own. Here's the honest tradeoff. https://mixandgo.com/vs/draft-dev - Draft.dev is a written technical content agency that ed video as a newer service. Mix & Go is built around video from day one. Here's the honest difference for devtool marketing teams choosing between them. https://mixandgo.com/vs/videodeck - Videodeck uses hired, on-camera presenters to produce devtool videos. Mix & Go has an engineer build or test the real thing, on camera as the code, not the face. Here's the honest difference in approach, pricing, and what you own. ### Case Studies https://mixandgo.com/case-studies/mix-and-go-channel - How Mix & Go's founder built a niche YouTube channel that generated $550K+ in revenue and 1,600 leads, without a big audience, viral videos, or ad spend. The full funnel breakdown. ### Landing Pages https://mixandgo.com/youtube - We build videos that answer the exact searches your developers make, so you show up before they've shortlisted anyone. https://mixandgo.com - AI-native product engineer with 18 years of Ruby on Rails. I set up fleets of AI agents in your codebase, so a small team ships more and the code still holds up. ### Learn (Developer Tutorials) https://mixandgo.com/learn - Index of Ruby, Rails, Elixir, and Elm tutorials. **Ruby on Rails:** https://mixandgo.com/learn/ruby-on-rails/3-ways-of-testing-private-methods-in-rails https://mixandgo.com/learn/ruby-on-rails/7-steps-to-better-cucumber-tests https://mixandgo.com/learn/ruby-on-rails/asset-pipeline-guide https://mixandgo.com/learn/ruby-on-rails/beginner-guide-rails-helpers https://mixandgo.com/learn/ruby-on-rails/decoupling-css-selectors https://mixandgo.com/learn/ruby-on-rails/email-design-with-tailwindcss https://mixandgo.com/learn/ruby-on-rails/external-apis-in-rails https://mixandgo.com/learn/ruby-on-rails/feature-vs-integration-vs-unit-tests https://mixandgo.com/learn/ruby-on-rails/how-i-create-a-new-rails-project https://mixandgo.com/learn/ruby-on-rails/how-to-install-bootstrap https://mixandgo.com/learn/ruby-on-rails/how-to-test-controllers-in-rails https://mixandgo.com/learn/ruby-on-rails/how-to-write-cucumber-tests-for-google-maps https://mixandgo.com/learn/ruby-on-rails/link-to https://mixandgo.com/learn/ruby-on-rails/nested-trees-rails https://mixandgo.com/learn/ruby-on-rails/rails-form-helpers https://mixandgo.com/learn/ruby-on-rails/turbo-frames-vs-turbo-streams https://mixandgo.com/learn/ruby-on-rails/view-component **Ruby:** https://mixandgo.com/learn/ruby/abstract-factory-pattern https://mixandgo.com/learn/ruby/adapter-pattern https://mixandgo.com/learn/ruby/argument-dependency https://mixandgo.com/learn/ruby/arrays https://mixandgo.com/learn/ruby/attr-accessor https://mixandgo.com/learn/ruby/blocks https://mixandgo.com/learn/ruby/boolean-operator-precedence https://mixandgo.com/learn/ruby/builder-pattern https://mixandgo.com/learn/ruby/case https://mixandgo.com/learn/ruby/class-variables https://mixandgo.com/learn/ruby/decorator-pattern https://mixandgo.com/learn/ruby/each https://mixandgo.com/learn/ruby/enumerable https://mixandgo.com/learn/ruby/factory-method-pattern https://mixandgo.com/learn/ruby/hash-vs-dictionary https://mixandgo.com/learn/ruby/how-to-learn-ruby https://mixandgo.com/learn/ruby/if-vs-unless https://mixandgo.com/learn/ruby/let-vs-let! https://mixandgo.com/learn/ruby/map https://mixandgo.com/learn/ruby/minitest-rspec https://mixandgo.com/learn/ruby/module-testing-with-rspec https://mixandgo.com/learn/ruby/oop-ruby https://mixandgo.com/learn/ruby/pass-by-reference-or-value https://mixandgo.com/learn/ruby/reducer https://mixandgo.com/learn/ruby/sort https://mixandgo.com/learn/ruby/strategy-pattern https://mixandgo.com/learn/ruby/string https://mixandgo.com/learn/ruby/symbols-vs-strings https://mixandgo.com/learn/ruby/what-is-ruby-used-for https://mixandgo.com/learn/ruby/what-is-type-driven-design-development-in-ruby **Elixir:** https://mixandgo.com/learn/elixir/why-learn-elixir **Elm:** https://mixandgo.com/learn/elm/chrome-extension-elm ## Key Topics - Agentic Engineering and AI Coding Agents for Ruby on Rails Teams - YouTube Lead Generation for B2B / DevTools - Done-For-You Content Marketing - YouTube SEO and Channel Strategy - B2B Demand Generation - SaaS Growth - Ruby, Ruby on Rails, Elixir, and Elm Development Tutorials ## API Endpoints This site does not expose a public API. ## Sitemap https://mixandgo.com/sitemap.xml ## Author Cezar Halmagean - YouTube lead generation systems for B2B. Built a YouTube channel that generated $47K+ from ~3,000 subscribers. LinkedIn: https://www.linkedin.com/in/chalmagean/ ## Contact Email: hello@mixandgo.com --- Generated: 2026-10-21