PLAYER 1 PAGE WORLD 2026

THE CHRONICLE · PAGE I OF II

DENIS
MATEJCIK

Developer · games & software

BASESlovakia / remote

I’m a passionate developer, and a stubborn one: I’m into games and into software of any kind, and I never managed to pick a side — so I keep building both.

Most of what I make starts the same way. Something annoyed me, or somebody needed a thing and nobody was building it. gas.green began as a delivery idea and turned into the project I’ve stayed with longest. DAB exists because I wanted a map with my friends on it and no server in the middle. Idle Master exists because a machine had to stay awake overnight without eating 11 GB of RAM.

In practice I’m the one who sets up the server, writes the backend, draws the sprite and then answers the support mail. Small teams, short loops, and I’d rather ship something rough on Friday and fix it on Monday than plan it for a month.

QUEST LOG — WHAT I BUILT, AND WHEN

NOW

VKOZI.COM

CLIENT

Web for MAXIM 74, a Slovak leather manufactory making belts for wholesale partners and brands. Their catalogue, their story, and enquiries that actually reach them.

web · B2B catalogue · SEO

NOW

GAS.GREEN

DELIVERY STARTUP

Customers, couriers and businesses on one delivery platform — ordering, dispatch, tracking, the courier app, the business dashboard. My longest-running project; I’ve been on it since it was a landing page.

TypeScript monorepo · Go services · Postgres / Supabase · Android builds

2026

DAB

ANDROID

A friends-only map that starts covered in fog and uncovers as you walk it. Positions, chat and calls go phone to phone over WebRTC — no DAB server, no account, and relays only ever see ciphertext.

WebRTC · end-to-end encryption · offline map tiles

2026

The sea slug game: about two hours of mind-controlling a nudibranch through environmental puzzles, underwater. Built in Unreal, with its own site. Proof I’ll chase a weird idea all the way to something playable.

Unreal Engine 5 · level & puzzle design

2026

One small exe for a machine that has to stay awake but shouldn’t burn 11 GB of RAM at 3am. Two buttons — boost now, or strip to vitals — and a sentry that keeps it there.

C# · Windows APIs · PowerShell

2025

AI AGENTS

B2B STARTUP

Building automation for B2B clients at an AI-agents startup: agent workflows, tool and MCP integrations, and the unglamorous glue that makes an LLM actually finish a job instead of describing it.

LLM tooling · MCP · scrapers · pipelines

2025

Trail guide for the DW klub — bike, run and hiking routes mapped around you, with the routes searchable and the map usable on a phone in a forest. Live and in use.

Vue · map tiles · Postgres

2025

CEAEUROPE.SK

COMPANY WEB

Site and catalogue for a Slovak promo-goods company trading since 2014 — products, enquiries, corporate events. The boring parts, done properly, for people who actually depend on them.

TypeScript · Next.js · PHP integrations

ALWAYS

MACHINES & INFRA

HOMELAB

Remote desktop servers, a home cloud, Docker, Tailscale, Android tooling, and whatever scripts the setup needs that week. If a thing has to run somewhere and keep running, I enjoy being the one who makes that happen.

Windows / Linux servers · Docker · Tailscale · PowerShell

PLAYER 1 EXP WORLD 2026

Thinker · AI Wizzard

DENIS
MATEJCIK

I build things that feel alive — marketplaces, games, AI agents. Small team energy, fast pace, and focus. Always open to the next quest.

BASESlovakia / remote
LVL 1

GAS.GREEN

MARKETPLACE

A digital marketplace for every business.
Editable listings, customizations, seller onboarding, checkout flow.
My longest-running project.

LVL 2

SEA SLUG GAME

UE 5

A game about mind-controlling a sea slug,
made in UE5 2h of gameplay, environmental
puzzles, underwater atmosphere. Proof I'll
chase a weird idea all the way to something playable.

LVL 3

AI AGENTS

B2B STARTUP

Worked at an AI-agents startup building automation for B2B clients — agent workflows, tool integrations, and the secret sauce that makes LLMs actually useful.

LVL 4

SIDEQUESTS

FUN

End-to-end encrypted P2P text & location
sharing app, a family-business web, a trail-
guide site plus smaller quests picked up
along the way.

EDU Computer Science · Middlesex University, London Mechatronics · secondary technical school