Bartosz Dymet bartek@zaur.app

Bartosz Dymet

Portrait of Bartosz Dymet

Frontend engineer · Svelte and TypeScript · Kraków

I design, build and run complete products. Websites since 1999, Svelte for over five years.

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Built from 10 open-source packages

Built from my open-source packages

Point at a product to see which packages it uses.

Products · 5

szkolyjogi.pl Open ↗

szkolyjogi.pl

Reading Google Search…

The directory of yoga and pilates schools in Poland: class schedules, pass prices, reviews and online sign-up.

What I built

  • The public directory in Polish, English and Ukrainian, with schedules, prices, reviews and booking.
  • A separate panel app for schools: passes, recurring classes, refund rules, VAT split and staff roles.
  • A Python scraper that reads school websites, price lists and timetable images with LLMs. Answers are forced into schemas, the model returns null rather than guessing, monthly prices are computed in code, and a read that would shrink a stored schedule below 40% keeps the old classes.
  • A database trigger stops the scraper overwriting anything a school edited itself. CI builds both apps as images and deploys them.
Tests
83 test files (Vitest)
Models
Benchmarked before use; one was dropped for inventing 15 classes on an empty page
Speed
Home-page layout shift cut from 0.11 to 0.00 with metric-matched font fallbacks
Stack
SvelteKit, Svelte 5, Drizzle, Postgres, Better Auth

Open szkolyjogi.pl

webmail.zaur.app Open ↗
The real client over a sample mailbox; nothing is sent, and it resets every 30 minutes.
register.zaur.app Open ↗
The real sign-up: an account made here is a working mailbox.

zaur.app

webmail.zaur.app

A private communications suite on one account: mail, calendar, video calls and music, on servers I set up and run.

What I built

  • A mail client over JMAP on SvelteKit 3 and remote functions, started on the pre-release: installable and offline-capable, with push notifications, calendar, contacts, files, rich compose and several accounts.
  • Its own sign-in. Mail is the OpenID Connect provider for Music, Photos and Bartube, and a sign-up portal creates real mailboxes through the Stalwart admin API.
  • The servers behind it: Stalwart mail on a VPS run through Dokploy, restic backups to a second machine, errors and traces in a self-hosted Traceway.
Tests
50 test files across the client and its shared packages; Playwright for sign-up
Decisions
5 architecture decision records
Delivery
GitHub Actions deploys; agent conventions in AGENTS.md
AI
Mail sorted by an LLM into a fixed set of labels, with a confidence floor, a timeout and a headers-only privacy mode

Open webmail.zaur.app Source on GitHub

  • kino.net.pl

    Reading Google Search…

    What plays in Polish cinemas today, hour by hour, with the small studio, culture-centre and film-club cinemas the big apps miss.

    Data
    230 cinemas in 174 towns, crawled every 6 hours
    Sources
    12 ticketing-site readers that keep the last good data on an empty read. When one site blocked the server, I switched source and measured the cost: 6% of films missed, none wrong
    Includes
    Town pages, a page per film, a panel where cinemas fix their own facts

  • kompi.pl

    Reading Google Search…

    One map of the places in Poland that take back e-waste, batteries and bulbs, filtered by what they accept and how.

    Data
    30,036 collection points in 1,951 cities, scraped by a Python crawler
    Map
    MapLibre, address search, nearest points from your location

  • festivals.zaur.app

    Reading Google Search…

    A worldwide directory of friendly, open-minded festivals: ceremony and embodiment gatherings next to boutique music and arts festivals.

    Includes
    Lineups, editions, reviews, organiser claims
    Facts
    A fact read by an LLM is kept only if its quote is on the fetched page; nothing publishes without approval
    Tests
    31 test files

Clients · 6

An online shop and five websites for businesses: designed, built and kept running.

  • fixtar.pl

    Reading Google Search…

    An online shop for power tools that I built and run for a client: catalogue, checkout, payments and order handling.

    Products
    Synced from BaseLinker
    Payments
    PayU, Przelewy24; a payment marks the order paid once, and only that request pushes it to BaseLinker and sends the email
    SEO
    Built to the client’s technical SEO spec: Product and Offer schema, five split sitemaps, canonical and noindex rules
    Feeds
    Google Shopping feed generated from the same data as the schema

  • pikastro.eu

    A colourful interior design studio in Kraków, with a custom CMS: the owner edits text and photos right on the live page.

    CMS
    Custom, click-to-edit on the page, with edit history
    Storage
    Netlify Blobs, no database
    Languages
    Polish, English

  • wibroakustyka.ai

    Product site for the Graal vibroacoustic wellness chair.

    Explains
    What an acoustic chair is and how vibroacoustics works
    Includes
    News and the Health & Longevity Summit 2026

  • tutitutu.pl

    Image-first portfolio for an interior architecture studio founded in 1997, which edits its own site.

    CMS
    Built on Michael Aufreiter’s Editable Website and extended by hand before AI: realisations with drag-and-drop ordering and image cropping
    Languages
    Polish, English
    Sections
    Realisations, workshop, publications, references

  • intertechpoland.pl

    Equipment catalogue and industry news for the Polish representative of Picarro and UGT.

    Energy
    Emissions monitoring and reduction, leak detection, pipe replacement
    Science
    CRDS spectroscopy, lysimeters, ecotrons, plant sensors
    Built
    My first hand-written Svelte site; rebuilt on Svelte 5 in 2025

  • gabinet-polaczenie.pl

    Acupuncture clinic in Kraków offering treatments that complement conventional care.

    Format
    One page, in Polish and English

Packages · 10

The building blocks my products share, published on npm under @nomideusz.

svelte-calendar.xyz Open ↗

svelte-calendar.xyz

@nomideusz/svelte-calendar 1.5.0

A themeable Svelte 5 calendar: day, week, scrolling-week and month views, agenda lists, touch-first mobile layouts, drag-and-drop, timezones, a headless API and an embeddable web component.

npm i @nomideusz/svelte-calendar

Used in Szkoły Jogi, Zaur and thebest.travel

On npm Source on GitHub

  • zaur-world 1.8.0

    A living ambient sky: real sun times, weather, true star positions, eclipses, and a pixel dinosaur who lives in it. Zero dependencies.

    npm i @nomideusz/zaur-world

    Radio Bartek, from Kraków

    This sky is the package, drawn live for Kraków: real sun, weather and stars. It is the sky of Radio Bartek, my 24/7 station whose AI DJ talks between the tracks in a clone of my voice.

    Used in Szkoły Jogi, Friendly Festivals and radiobartek.com

    Demo Source

  • svelte-i18n 1.0.0

    Lightweight i18n for Svelte 5: runes-based locale state, flat JSON messages, URL-locale routing. This page is translated with it.

    npm i @nomideusz/svelte-i18n

    Every word on this page is a key in a flat JSON catalog.

    Used in Szkoły Jogi, thebest.travel, Kino, Friendly Festivals and kurcz.pl

    Demo Source

  • svelte-geometrize 0.9.3

    Geometric image placeholders: triangles resolve into the real photo as it loads.

    npm i @nomideusz/svelte-geometrize

    Every screenshot on this page paints first as triangles fitted at build time, then opens into the picture.

    Used in Szkoły Jogi and kurcz.pl

    Demo Source

  • svelte-qr 1.0.0

    Zero-dependency QR codes for Svelte 5: a pure TypeScript encoder with SVG output.

    npm i @nomideusz/svelte-qr

    Used in Szkoły Jogi and thebest.travel

    Demo Source

  • svelte-media 1.0.0

    Image upload, processing, and S3-compatible storage for Svelte 5 apps.

    npm i @nomideusz/svelte-media

    Used in Szkoły Jogi, thebest.travel and Friendly Festivals

    Demo Source

  • svelte-scheduler 0.4.3

    Booking and scheduling logic for Svelte 5: tour slots, pricing, cancellation policies.

    npm i @nomideusz/svelte-scheduler

    Used in Szkoły Jogi and thebest.travel

    Demo

  • svelte-payments 0.5.0

    Provider-agnostic payments for booking apps: a Mollie server adapter and a Stripe Connect UI.

    npm i @nomideusz/svelte-payments

    Used in Szkoły Jogi and thebest.travel

    Demo

  • svelte-notify 1.1.0

    Email notification templates for booking apps.

    npm i @nomideusz/svelte-notify

    Used in Szkoły Jogi, thebest.travel, Kino and Friendly Festivals

    Demo

Work in progress · 1
thebest.travel Open ↗

thebest.travel

A tour marketplace for Cracow: local guides, live availability and online booking.

What I built

  • Tour pages with live availability, time slots, pricing and cancellation policies, all from svelte-scheduler.
  • Checkout on Stripe Connect, still in test mode while the business side is set up.
  • English and Polish, deployed on Railway.
Stack
SvelteKit, Svelte 5, Drizzle, Postgres
Payments
A repeated Stripe webhook is ignored once the booking is paid

Open thebest.travel

Side projects · 2

Small things I made for myself and keep online.

  • kurcz.pl

    Everything about muscle cramps: causes, first aid and prevention, as fast static pages.

    Built with
    Astro, no JavaScript on article pages
    Languages
    Polish, English

  • kruk.live

    Five mini-apps live on one site: a drawing board, a kanban, pixel art, friends and a property scraper.

    Inside
    Draw, Kanban, Pixels, Friends, Properties
    Mode
    Real-time and collaborative
    Note
    An experiment with Phoenix LiveView; the Elixir is written by Claude Code

Railway templates · 125

Infrastructure work: one-click deploys of open-source software on Railway. Every template runs unmodified upstream images.

AI and agents

Observability

Developer and automation

Business

Work and chat

Media and community

Browsers in the cloud

Desktop apps in the cloud

Linux machines

  • Linux Terminal (Ubuntu Web Shell + SSH + tmux)

    Ubuntu 24.04 Linux shell in the browser and over SSH. tmux, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Ubuntu XFCE)

    Ubuntu XFCE desktop streamed to your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Ubuntu KDE Plasma)

    Ubuntu KDE Plasma desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Ubuntu MATE)

    Ubuntu MATE desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Ubuntu i3)

    Ubuntu i3 tiling desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Ubuntu LXQt)

    Ubuntu LXQt desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Debian KDE Plasma)

    Debian KDE Plasma desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Arch Linux XFCE)

    Arch Linux XFCE desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource
  • Linux Desktop (Alpine KDE Plasma)

    Alpine KDE Plasma desktop in your browser. Password-gated, persistent.

    Deploy on RailwaySource

Sites, games and more

Skills · 1
  • simple-web-design

    Agent skill for auditing, critiquing, and building better websites, grounded in Anthony Hobday's 15 principles of simple web design.

    Source