Author profile

Hi, I'm Antonin.

Antonin Januska^*

Staff Software Engineer · Boulder, Colorado

Staff Engineer building AI-backed systems, engineering standards, and the workflows that let teams ship serious software.

Abstract

Staff engineer focused on the infrastructure production LLM systems run on: evaluation harnesses, multi-provider dispatch, rate-limit handling, and guardrails on model output.

LinkedIn GitHub

Portrait of Antonin Januska against greenery — Figure 1: The author.

Table 1: Summary statistics.
Years building	Blogging since	GitHub stars
20+	2012	600+

1Principles

Stated without proof, except where one is short.

Axiom 1. A deployed MVP is worth two prototyped.

Axiom 2. Dance like nobody is watching, code like everybody is.

Axiom 3. Today's fashion is tomorrow's legacy.

Axiom 4. Debugging becomes easier if you first admit that you are the problem.

Axiom 5. The best code is no code at all.

Proof. Code that is not written has no bugs. ∎

See the proverbs project →

2Beyond code

The rest of the operating system.

Antonin hiking in Colorado — Figure 2: Hiking in Colorado.

Definition 1 (Photography). I shoot animals, landscapes, people, and street scenes. The camera is how I stay observant.

Definition 2 (Fiction). I write AI-themed fiction and short stories when technical writing is not enough. See I, AI.

Definition 3 (Podcasts & Games). I have opinions about Final Fantasy, narrative design, and the overlap between games and technology.

3What I work with now

The stack changes. The throughline doesn't. I'm usually working where backend systems, product delivery, and AI workflows collide.

Table 2: Capabilities.
Group	Approach	Skills
AI & LLM Systems	Measuring model output, routing it across providers, and trusting none of it by default.	LLM Evaluation & Judge Grading; Multi-Provider LLM Dispatch; Token Budgeting & Rate-Limit Engineering; Structured Output & Guardrails; Model Context Protocol (MCP); Agent Tooling & Orchestration
Languages	Python on the backend, TypeScript for everything else, SQL wherever the data lives.	Python; TypeScript; SQL
Platforms & Tools	Async services on Kubernetes, databases picked per job, front ends in React or Svelte.	FastAPI; Redis; Postgres; SQLite; Kubernetes on Azure; React & Next.js; SvelteKit
Leadership	Setting technical direction and standards, then reviewing what ships against them.	Technical Strategy; Engineering Standards; Cross-Team Delivery; Code Review; Mentoring

I help teams implement AI-enabled product work, sharpen engineering practices, and build systems that survive real usage.

Get in touch →

4Selected work

[1]A. Januska. cc-dash. TypeScript · Model Context Protocol.
[2]A. Januska. Skillbox. Claude Code · Agent tooling.
[3]A. Januska. Agent Compiler. CLI that embeds agent skills into CLAUDE.md and fails CI when the embedded content drifts.
[4]A. Januska. Using Git Worktrees to Parallelize AI Agents. Writing, 2026.
[5]A. Januska. 17 Side Projects I Built With Claude Code in Two Months. Writing, 2026.
[6]A. Januska. Programmer's Proverbs. GitHub, 680 stars.