Selected work / evidence

Show, don’t
just claim.

Apps, published fiction, research, and product concepts. Explore the work and the thinking behind it.

Paid workAI model training
IndependentResearch & creative projects
CoreLanguage · systems · QA
AvailableRemote · CET
UPCOMING PROJECT / A BY NOWAK GAME

DON’T COME HOME.

An analog-horror story in six evenings. Every night someone knocks, and you decide who gets to be real. Planned for Steam at €12, with optional extras sold separately. Not available to play yet, and no release date.

Visit the game’s own site ↗

The apartment building’s roof at night, with a kitchen hanging upside down in the sky
Released book · Available on Amazon

Blood Won’t Melt
This Snow.

Enter a world of power, divinity and consequence.

An original dark-fantasy book by Mateusz Nowak. Interwoven characters, political tensions and divine systems form a world where every choice leaves its mark.

Get the book on Amazon ↗Discover the book ↗

Written by Mateusz Nowak · Published fiction

Open source / built to be used

Apps I built. Tools you can use.

Two independent open-source apps: Sitecheck for website auditing, and CleanClip for cleaner copying. Built, tested and documented, with source and downloadable releases on GitHub.

Website auditing · MIT licensed

Sitecheck

I built Sitecheck to audit public websites for SEO, accessibility, metadata, link health and HTML structure. It produces a transparent score and evidence-backed recommendations through a CLI or responsive dashboard.

  • TypeScript
  • Node.js
  • Next.js
  • Playwright
View Sitecheck on GitHub ↗Browse releases ↗Explore the app ↗
One URL. A clearer picture.
sitecheck https://example.com
sitecheck https://example.com --format json
  • SEO & metadata
  • Accessibility
  • Technical health
  • Content & structure

Readable reports. Evidence for every finding.

Browser extension · MIT licensed

CleanClip

I built CleanClip to turn copied website text into readable plain text, clean Markdown or sanitized rich text. It keeps useful structure while removing styling clutter, tracking parameters and invisible characters.

  • TypeScript
  • React
  • Manifest V3
  • Vite
View CleanClip on GitHub ↗Explore the app ↗

v1.0.0 available on GitHub · Chrome Web Store review pending

Copy the content.
Keep the structure.
Copied from a website

“A useful idea.”

Fonts, colors & tracking links
CleanClip / Markdown
## A useful idea

- Keep the useful structure
- Leave the clutter behind
  • Four presets
  • Input/output preview
  • Local processing
  • No analytics

No clipboard history. Automatic cleaning is opt-in.

Explore my GitHub projects ↗
01

Blood Won't Melt This Snow

Released dark-fantasy book by Mateusz Nowak. Explore an original world of political tension, divine power and interwoven lives. Available on Amazon.

↗02

AI Evaluation & Model Training

Professional remote contract work: detailed criteria, structured judgment, quality standards and fast task onboarding.

↗03

Moshpitt.AVG

Experimental browser horror / ARG combining narrative design, HTML/JavaScript and audience-led discovery.

↗04

Temori

Product concept translating a behavioural metaphor into features, progression and user workflow.

↗05

Independent Research

Source comparison, counterarguments, falsifiability and evidence-focused synthesis across psychology and consciousness.

↗06

Creature-Based RPG Systems

Structured data, progression rules, move pools, abilities, evolution logic and consistency checking.

↗
The pattern

What these projects
prove together.

01

I can hold context

Large projects only work when decisions remain consistent across documents, rules and iterations.

02

I can switch modes

Research, editing, technical tinkering and creative direction demand different kinds of thinking without losing the goal.

03

I finish structures, not just ideas

I’m interested in turning concepts into usable systems, documents and outputs rather than leaving them as moodboards.