Jere Joensuu

Game Developer

About Me

I’m a Unity/C# game developer working on gameplay programming, UI, tools, AI, multiplayer, optimization, and game systems.

I have experience from game studio teams and contracted projects. As an independent contractor for Rokada Games, I have been building the complete digital version of RokadaChess. I’m responsible for its game programming, including the rules engine, AI, and multiplayer.

Degree: Bachelor of Business Administration, Business Information Systems
Institution: Tampere University of Applied Sciences (TAMK)
Specialization: Game Development and Design through the TAMK Games Academy

Skills & Learning

Featured Project

Rokada Games - Independent Contractor

2025 - present

RokadaChess.com RokadaChess.fi

Contracted to build the complete digital version of RokadaChess.
Responsible for all game programming: rules engine, AI, multiplayer, UI systems, game mode support and more.
Architected a deterministic rules engine that handles advanced mechanics.
Developed performant AI search and evaluation systems tailored to RokadaChess’s asymmetric rule constraints.

Other Work Experience

Kyy Games

2024 - 2025

Worked on core gameplay, UI, and data systems in a large live Unity project.
Improved runtime performance and memory use across gameplay and UI.
Built custom editor tools that made debugging and iteration faster for designers and QA.
Fixed and maintained legacy systems, ensuring stability across frequent content updates.
Participated in a research project exploring how large language models (LLMs) can enhance game development, production, and publishing workflows.

Skydome Entertainment

2024 - 2024

Developed custom editor tools for enhanced scene management and improved workflow.
Worked on rendering controls, save system optimization, object tracking solutions, and cutscene integration.
Focused on optimizing project performance and efficiency.
Implemented efficient methods for managing object states and project-specific tools.

Supremacy Games

2022 - 2024

Worked on the client side of Apex Kings, a web3 racing game.
Played a major role in creating the main gameplay and UI structure.
Contributed to some of the game's design aspects.

Projects on GitHub

Procedural Animation

A procedurally animated spider in Unity using inverse kinematics.

Solo project
Partly ready for outside project usage
Created creatures adapt to the environment and procedurally place their legs on surfaces
Legs move based on the velocity of the body for natural movement

itch.io

Pookie Island

Small puzzle platformer

School project
Complete game
Responsible for

player movement
cameras/cutscenes
vacuum and powerup mechanics

Arachnophobia Demo

Demo for a horror game. Public fork for portfolio purposes.

Solo project
UE learning project
Dynamic particle system for environmentally aware spiders
The leg animation and movement code both run on the GPU allowing thousands of spiders to exist in a level
Car driveable

Chess

Simple chess game with an AI opponent

School project
Responsible for all code, leveraging online resources like Chessprogramming.org
AI functionality implemented but left unpolished due to time constraints

The Banishment

A short horror game experience

School project
Responsible for most (player movement, environment interactions, level system, etc)

The Tainted Forest

A recreation of the old arcade game, Pang.

School project
Acted as the unofficial lead programmer, ensuring the code met deadlines.
Responsible for

The character and it's various functionalities
Easier level making tools (suchs as dynamic sprite loading depending on level type)
Level elements
Bubbles and their various mechanics
Power-ups and other item drops
Animations for UI elements
Handled controls/inputs

modrinth.com

World Border Timer

A lightweight Fabric mod that displays a live countdown showing when the world border will reach the player or complete its shrink. Includes configurable HUD placement and formatting.

Published and used by players on [Modrinth](https://modrinth.com/mod/world-border-timer)
Configurable HUD placement and formatting
Includes semi-automated version testing tools

modrinth.com

Looping Void

Minecraft data pack that replaces void death with a configurable recovery system that returns players to relatively safe heights from the void.

A data pack made using Minecraft's command system
Published and used by players on [Modrinth](https://modrinth.com/datapack/looping-void)

Contact

Email: [email protected]

LinkedIn: linkedin.com/in/jerejoensuu

GitHub: github.com/jerejoensuu