AntJanusCatalog of works · est. 2012
Januska, Antonin.Biography
920 J33

Hi, I'm Antonin.

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

Staff engineer focused on the infrastructure production LLM systems run on: evaluation harnesses, multi-provider dispatch, rate-limit handling, and guardrails on model output. Twenty years of building software, most of it lately in domains where a confidently wrong answer is worse than no answer.

Years building
20+
Blogging since
2012
GitHub stars
600+
LinkedInGitHub

1. Software engineers — Colorado — Boulder. 2. LLM systems. 3. Technical leadership. I. Title.

Portrait of Antonin against greenery
A. Januska, portrait
808.88 · Proverbs

Principles

Five cards from the proverbs drawer.

See the proverbs project →

A deployed MVP is worth two prototyped.

Dance like nobody is watching, code like everybody is.

Today's fashion is tomorrow's legacy.

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

The best code is no code at all.

Antonin hiking in Colorado
somewhere above Boulder

Beyond Code

The rest of the operating system

  • 770
    Photography

    I shoot animals, landscapes, people, and street scenes. The camera is how I stay observant.

  • 813.6
    Fiction

    I write AI-themed fiction and short stories when technical writing is not enough.

  • 794.8
    Podcasts & Games

    I have opinions about Final Fantasy, narrative design, and the overlap between games and technology.

Subject authority file

What I work with now

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

006.3 · Subject authority

AI & LLM Systems

Scope note
Measuring model output, routing it across providers, and trusting none of it by default.
Narrower terms
  • LLM Evaluation & Judge Grading
  • Multi-Provider LLM Dispatch
  • Token Budgeting & Rate-Limit Engineering
  • Structured Output & Guardrails
  • Model Context Protocol (MCP)
  • Agent Tooling & Orchestration
005.13 · Subject authority

Languages

Scope note
Python on the backend, TypeScript for everything else, SQL wherever the data lives.
Narrower terms
  • Python
  • TypeScript
  • SQL
005.4 · Subject authority

Platforms & Tools

Scope note
Async services on Kubernetes, databases picked per job, front ends in React or Svelte.
Narrower terms
  • FastAPI
  • Redis
  • Postgres
  • SQLite
  • Kubernetes on Azure
  • React & Next.js
  • SvelteKit
658.4 · Subject authority

Leadership

Scope note
Setting technical direction and standards, then reviewing what ships against them.
Narrower terms
  • Technical Strategy
  • Engineering Standards
  • Cross-Team Delivery
  • Code Review
  • Mentoring

See also — selected work

Work with me

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

Get in touch →