Mobile Survival Game Design

Need a game designer for a mobile game (early stage of development)

Project description:
We are developing a mobile game in the genre of Survival. The game is aimed at casual gamers, teenagers.
The project is at the prototype stage, we plan to create GDD, balance system and elaboration of game mechanics.

Tasks:
- Participate in the formation of the general concept of the game;
- Writing a detailed Game Design Document (GDD);
- Working out game mechanics, levels, progression-system;
- Development of monetization system;
- Collaboration with programmers, artists and producer;
- Ability to make edits and suggestions to improve the project.

Requirements:
- Gamedesign experience from 1 year (or have a portfolio/ready projects);
- Ability to structure ideas and document them;
- Understanding of mobile gamdev and trends;
- Experience with Survival games is welcome;
- Communication skills, responsibility, initiative.
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Collaboration Format:
Remote, part-time or full-time. Payment by agreement (fix/stage/revenue-share - we'll discuss).

How to respond:
Please send a portfolio (if available), briefly tell us about yourself, experience and favorite mobile games.