# Yaroslav Markin

> Engineer, consultant, fractional CTO

- [Yaroslav Markin](/index.md)
- [Open Source](/opensource.md)
- [astro-nice-asset-filenames](/opensource/astro-nice-asset-filenames.md) — Astro integration for short, readable asset URLs.
- [astro-slop](/opensource/astro-slop.md) — Astro integration for LLMs: markdown versions of every page, llms.txt, and alternate links.
- [Audition](/opensource/audition.md) — Auditions Ruby scripts, gems, Rack apps, and Rails applications for Ractor-readiness—static analysis of isolation violations plus dynamic in-Ractor probing, with explanations and fixes.
- [Bundlebun](/opensource/bundlebun.md) — Bundles Bun—a fast JavaScript runtime, package manager, and builder—with Ruby and Rails applications.
- [Callback Hell](/opensource/callback_hell.md) — Analyzes Rails application models and provides actionable insights on callbacks and validations.
- [Carbon Fiber](/opensource/carbon_fiber.md) — A high-performance Ruby Fiber scheduler powered by Zig and libxev.
- [Inkmark](/opensource/inkmark.md) — A very fast, feature-packed, AI-first Markdown (CommonMark/GFM) gem for Ruby, built on pulldown-cmark.
- [Kino](/opensource/kino.md) — A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front end, Ractor-parallel Ruby workers, and a threaded fallback mode.
- [gem nosj](/opensource/nosj-ruby.md) — A fast, json-gem-compatible JSON parser and generator for Ruby—Rust and SIMD via the first-party nosj crate, precompiled PGO platform gems, lazy documents and partial parsing, and a one-line JSON drop-in.
- [nosj](/opensource/nosj.md) — Pull, push, and fused-cursor JSON parsers plus a streaming writer, SIMD-accelerated (NEON, SSE2, runtime-detected AVX2), for hosts that build native values during the parse.
- [Posts](/posts.md)
- [Bundlebun bundles Bun, and a tour of asset pipelines and JavaScript runtimes Rails has been through](/posts/bundlebun-bundles-bun.md) — Bundlebun is a Bun bundler for Rails. The why, the how, and a tour of every asset pipeline and JavaScript runtime Rails has been through to get here.
- [Inkmark: a very fast, feature-packed, AI-first Markdown gem for Ruby](/posts/inkmark-fast-ai-first-markdown.md) — Markdown is the lingua franca of the AI internet. Inkmark is a very fast Rust-backed Ruby Markdown gem, has features galore, and comes with first-class support for LLM/RAG pipelines.


## Press

- [Evil Martians: How developers help startups to take off (and how much they earn doing that)](https://web.archive.org/web/20200318152645/https://incrussia.ru/fly/evil-martians/) (Inc. Russia)
- [IT specialist on how the Internet will survive the Crisis: Remote work, skills development, and automation of everything](http://www.lookatme.ru/mag/how-to/tops/211105-it-expert) (Look At Me magazine)
- [Evil Martians: the journey from two people in a cafe to offices in NYC, SF, and Osaka](https://vc.ru/life/147200-zlye-marsiane-put-ot-dvuh-chelovek-v-kafe-do-ofisov-v-nyu-iorke-san-francisko-moskve-i-osake) (VC.ru)