Simone Carletti: Rails at the Center of DNSimple

In this episode of On Rails, Robby is joined by Simone Carletti (https://simonecarletti.com/), CTO of DNSimple (https://dnsimple.com/), where Rails has sat at the core of a globally distributed DNS platform since the company launched in 2010. Simone walks through how DNSimple's infrastructure is organized across three primary languages - Ruby on Rails, Go, and Erlang - each chosen deliberately for the role it plays: Rails powering the main application and API, Go handling the zone server, and Erlang running their custom-built name servers. He explains why Rails has remained central even as the platform grew well beyond a typical web app, and what it takes to keep a long-lived codebase healthy with a lean team of around 15 engineers.

Tools & Libraries Mentioned
Sidekiq — Background job processing (enterprise edition) — https://sidekiq.org/
RSpec — Testing framework — https://rspec.info/
Knapsack — Parallel test suite splitting — https://github.com/KnapsackPro/knapsack
Lograge — Structured JSON logging for Rails — https://github.com/roidrage/lograge
ViewComponent — Component-based view layer for Rails — https://viewcomponent.org/
Hanami — Ruby web framework, used for portions of the DNSimple API — https://hanamirb.org/
PostgreSQL — Primary relational database — https://www.postgresql.org/
ClickHouse — Analytics database for DNS query log processing — https://clickhouse.com/
Erlang/OTP — Runtime for DNSimple's custom name server (ErlyDNS) — https://www.erlang.org/
Go — Language powering DNSimple's zone server — https://go.dev/
Docker / Docker Compose — Used to run the full DNSimple infrastructure stack locally — https://www.docker.com/
Cursor — AI coding tool adopted across the DNSimple team — https://www.cursor.com/
Claude Code — AI coding tool adopted across the DNSimple team — https://docs.anthropic.com/en/docs/claude-code/overview
Terraform / Infrastructure as Code — Used to manage DNSimple's own domains and GitHub repositories — https://www.terraform.io/
Books Mentioned
Eloquent Ruby by Russ Olsen — https://pragprog.com/titles/elruby/eloquent-ruby/
Design Patterns (Gang of Four) — https://www.informit.com/store/design-patterns-elements-of-reusable-object-oriented-9780201633610

Видео Simone Carletti: Rails at the Center of DNSimple канала Ruby on Rails