Backend Developer - Design & Math

Yggdrasil Gaming Ltd; Kraków; On-site; PLN 120,000 - 180,000; Full time

Job summary

Yggdrasil Gaming Ltd in Kraków is seeking a backend-focused engineer to develop backend systems and mathematical models for Game in the Box solutions, implementing game logic, simulations, and data interfaces.

You will test, validate, and optimise gameplay mechanics, collaborate with cross-functional teams in an agile environment, and contribute to documentation and deployment processes. Strong math skills and experience with testing are expected.

Qualifications

• 2–3 years of commercial backend development experience in Java/Kotlin/TypeScript/Node.js or C#.

Responsibilities

• Develop the backend and mathematical models for Game in the Box solutions, including implementation of game logic and integration with system components.
• Maintain and develop game designs used in projects.
• Implement new game-related functionalities.
• Prepare and execute unit and integration tests.
• Design game functionalities in accordance with licensing regulations.
• Collaborate with project teams and developers on integration and implementation of game projects.
• Conceptualise and implement new game projects within defined requirements and constraints.
• Verify the correctness of game designs and optimize them.
• Analyse game-related data to identify new mechanics and industry trends.
• Evaluate game performance after deployment and provide insights into player behaviour.
• Conduct analyses to detect irregularities and propose corrective solutions.

Skills

Backend development

Java/Kotlin/TypeScript/Node.js/C#

Mathematics / probability

Unit & integration testing

Agile / cross-functional teams

English communication

Tools

Docker

Job description

• Developing the backend and mathematical models for Game in the Box solutions, including implementation of game logic, computational systems, and integration with other system components;
• Maintaining and developing game designs used in projects;
• Implementing new game-related functionalities;
• Preparing and executing unit and integration tests;
• Designing game functionalities in accordance with licensing regulations;
• Designing and developing game mechanics and game projects supporting ongoing initiatives;
• Creating project and technical documentation;
• Collaborating with project teams and developers on the integration and implementation of game projects;
• Conceptualising and implementing new game projects within defined requirements and constraints;
• Verifying the correctness of game designs, ensuring their alignment and optimisation;
• Analysing game-related data to identify new mechanics and industry trends;
• Evaluating game performance after deployment and providing insights into player behaviour;
• Conducting analyses to detect irregularities and proposing corrective solutions.

Qualifications:

• 2–3 years of commercial backend development experience (e.g. Java/Kotlin/TypeScript/Node.js or C#)
• Strong mathematical skills, including a solid understanding of probability, statistics, and algorithms
• Mathematical intuition and the ability to build, run, and interpret simulation results
• Hands‑on experience with unit and integration testing
• Strong collaboration skills and experience working in agile, cross‑functional teams
• Good command of English (written and spoken)
• Genuine passion for games and commitment to delivering high‑quality software

Nice to have:

• Experience with backend development for online casino / iGaming products
• Familiarity with video slot mechanics and slot math models (RTP, volatility, hit frequency, pay tables)
• Experience designing game mechanics or mathematical models for games
• Ability to test and validate mathematical outcomes using MS Excel, programming, and proprietary tools to guarantee accuracy and quality
• Understanding of Docker and containerization
• Understanding of licensing and regulatory requirements in regulated gaming markets
• Ability to test and validate mathematical outcomes using MS Excel, programming, and proprietary tools to guarantee accuracy and quality