Backend Developer - Design & Math

Yggdrasil; Kraków; On-site; PLN 120,000 - 190,000; Full time

Job summary

Yggdrasil Gaming in Kraków is seeking a backend developer to join the Game in the Box team. You will design and implement game logic, build mathematical models, and integrate with other system components.

The role requires collaborating with project teams in an agile environment, writing unit and integration tests, and ensuring compliance with licensing regulations while exploring new game mechanics.

Qualifications

• 2–3 years of backend development experience.
• Strong mathematical skills including probability, statistics, and algorithms.
• Hands-on experience with unit and integration testing.
• Good command of English (written and spoken).
• Genuine passion for games and delivering high-quality software.

Responsibilities

• 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.
• Collaborating with project teams and developers on the integration and implementation of game projects.
• Conceptualizing and implementing new game projects within defined requirements and constraints.
• Verifying the correctness of game designs, ensuring their alignment and optimization.
• Analyzing game-related data to identify new mechanics and industry trends.

Skills

Backend dev

Mathematics

Unit testing

Agile teamwork

English

Tools

Docker

Job description

At Yggdrasil Gaming, we are known for transforming ideas into groundbreaking gaming experiences. With innovation at the heart of everything we do, we’ve built a reputation for creating some of the most iconic slots in the iGaming world. Recently, we’ve taken our vision even further, becoming one of the largest global aggregators and a leading technology company, redefining what’s possible in the industry.

Our success is driven by the exceptional people who bring our ideas to life. Over the past year, we’ve cultivated a culture where creativity, expertise, and ambition come together to achieve extraordinary results. At Yggdrasil, you’ll find a place where your talent can thrive and where you’ll have the opportunity to be part of something truly transformative.

If you’re ready to help shape the future of gaming, we’d love to hear from you.

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;
• Conceptualizing and implementing new game projects within defined requirements and constraints;
• Verifying the correctness of game designs, ensuring their alignment and optimization;
• Analyzing game-related data to identify new mechanics and industry trends;
• Evaluating game performance after deployment and providing insights into player behavior;
• 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