The work below is mostly closed-source, so here's the stuff you can actually click into:

• sec_id - validate, parse, normalize and convert securities identifiers (ISIN, CUSIP, SEDOL, FIGI, LEI, IBAN, and more), check-digit math included. My oldest gem.
• clsx-rails - clsx/cn view helpers for Rails; a drop-in class_names replacement that benchmarks 2–4× faster.
• clsx-ruby - the framework-agnostic core: conditional CSS class strings for ViewComponent, Phlex, or plain templates.
• hacker_news_sorted - Chrome extension to re-sort the HN front page by points/time/comments. TypeScript, Manifest V3, zero data collection.
• oz - config-driven CLI wizard framework in Go: define prompts in YAML, wrap any tool in a discoverable TUI.
• create-rails-app · create-gem - interactive wizards for rails new and bundle gem, so you stop looking up flags.
• http_wrapper - a small, ergonomic skin over stdlib Net::HTTP.
• smsru_ruby - dependency-free client for the SMS.ru API: send SMS, phone-call verification, delivery status. Fully RBS-typed, with constant-time webhook signature verification.

→ a few more on the repos tab

• A blank repo and broad ownership - schema, infra, deploy pipeline, the lot. Building something from zero is the part that actually energizes me.
• Small teams with a short chain of command. Move fast, but with quality; no long approval chains.
• Designing good interfaces - clean APIs for the people who call them, sharp CLIs and libs for the people who build with them.
• Untangling messy code into something you can reason about. Decomposition is the fun part, not the chore.
• Making slow things fast - finding the real bottleneck and killing it: N+1 queries, missing indexes, counter caches, hot-path denormalization. Measured wins, not guesses.
• Ruby/Rails by default, Go for CLIs and small services, TypeScript on the front end - increasingly AI-augmented across all of it.