Olivier Piasecki Bruhdows

Olivier Piasecki

Java Backend Developer based in Poznań, Poland.

I build backend systems, multiplayer infrastructure, open-source tooling, and web applications for real businesses.

Building and operating Boxhunt.pl, a custom multiplayer platform that has handled more than 1,300 concurrent players and supports a community of over 13,000 members.
Delivered production websites for two real businesses.
Maintaining TwemojiChat across Fabric, Forge, and NeoForge.
Currently looking for junior backend roles, project-based cooperation, and opportunities to work with experienced engineering teams.

A multiplayer network I designed, developed, deployed, and operate independently.

Built a custom modular Java server platform from scratch.
Operates across a Velocity and Paper multi-server environment.
Uses Redis and MongoDB for cross-server communication, caching, and persistence.
Includes custom gameplay systems, configuration tooling, addon lifecycle management, and deployment workflows.
Reached more than 1,300 concurrent players at peak.
Maintained in production since 2022.

Technologies: Java, Paper, Velocity, Redis, MongoDB, Gradle, Docker, Linux

Open-source client mod adding Twemoji autocomplete and rendering to Minecraft chat.

Supports Fabric, Forge, and NeoForge across approximately 19 loader and version combinations.
Includes a custom data pipeline for generating emoji font sheets and shortcode aliases.
Uses GitHub Actions for builds and release verification.
Published under the MIT licence.

Technologies: Java, Kotlin, Python, Gradle, GitHub Actions

Delivered production websites for:

wynajem-samochody.pl - truck rental company with a fleet of around 120 vehicles.
algupominki.pl - B2B promotional-products company in Poznań.

Work included responsive frontend implementation, content structure, lead-generation flows, deployment, and ongoing updates.

Technologies: TypeScript, React, Vite

Java - primary language used for backend systems, multiplayer infrastructure, and modular server platforms.
Kotlin - used in multi-loader mod development and shared tooling.
Redis - cross-server messaging, caching, and distributed state.
MongoDB and MySQL - persistence for application and platform data.
Docker and Linux - deployment, service management, and production operations.
Gradle and Maven - Java and Kotlin build tooling.
GitHub Actions - continuous integration and automated builds.
TypeScript and React - production websites and frontend applications.
Node.js and Express - APIs, integrations, and lightweight backend services.
Git - version control and project collaboration.