Rush Street Interactive
online casino and sports betting
GameDesigner,Mathematician
Neural analysis suggests this role is
optimal for Senior candidates.
“Game Designer, Mathematician at Rush Street Interactive. Skills: slot game design, slot game mathematics, casino game mathematics, mathematical modeling, simulation and verification scripting. designing the functional mechanics and mathematical models of original online casino games. defining features, bonus structures, paytable economics, and underlying math models”
What You'll Achieve.
deliver engaging, commercially viable player experiences aligned with the RSI brand; ensure all math models meet regulatory requirements; achieving together what others believe to be improbable
Industry & Context.
simulation validation; verify behavior across gameplay scenarios; test edge cases; analyzing post-launch game performance data; recommend math and mechanic adjustments
What They're Looking For.
Must Have
8+ years of direct, hands-on experience in slot game design and/or slot game mathematics within a land-based or online casino game studio environment, Expert-level knowledge of casino game mathematics: RTP calculation, volatility modeling, hit frequency analysis, standard deviation, prize distribution, combinatorics, and probability theory, Proven ability to design engaging slot game mechanics across different gambling concepts and styles, including innovative feature structures, bonus flows, progressive/jackpot systems, and paytable economics, Proficiency in building and running game math simulations and verification scripts using Python, C++, C#, Javascript or equivalent programming languages, Advanced Excel skills for probability modeling, paytable prototyping, and large-dataset analysis, Deep familiarity with PAR sheet creation and regulatory documentation standards for online and/or land-based slot games, understanding of player psychology, behavioral engagement patterns, and what makes slot games commercially successful, Excellent communication skills with the ability to translate complex mathematical concepts into clear documentation for both technical and non-technical audiences
Nice to Have
Master's degree or higher in a quantitative discipline
What You'll Do.
designing the functional mechanics and mathematical models of original online casino games
and underlying math models
contributing to the design and optimization of site-wide promotional and gamification mechanics
owning the full functional design-to-model lifecycle for each game
creating and maintaining PAR sheets
and all regulatory math documentation
defining symbol hierarchies
win-line configurations
and feature trigger conditions
building and running simulation code to validate math models
writing demo and prototype code to rapidly test mechanic concepts
evaluating existing casino concepts for adaptation
creating comprehensive Game Design Documents (GDDs) and functional specifications
ensuring all math models meet regulatory requirements
adapting designs for market-specific RTP ranges
and fairness standards
play-testing and iterating on in-development games
analyzing post-launch game performance data
recommending math and mechanic adjustments to live games
maintaining and contributing to RSI’s internal game design standards and style guides
providing functional specifications and mechanic requirements that inform visual and thematic direction
verifying math implementation in code
brainstorming concepts
refining games in progress
sharing best practices
How You'll Work.
Team & Collaboration
in close collaboration with engineering, product, and creative teams; collaborate with creative leads; Work with software engineers; Partner with designers and product managers
Communication Scope
Excellent communication skills with the ability to translate complex mathematical concepts into clear documentation for both technical and non-technical audiences
Full Job Description
Rush Street Interactive (NYSE: RSI) is a market leader in online casino and sports betting, currently operating real-money gaming with our brands: BetRivers.com, PlaySugarHouse.com, and RushBet.co. We’re building bridges between online, social and land-based gaming businesses to create amazing, integrated experiences that keep players in the game. The Game Designer, Mathematician is a senior individual contributor responsible for designing the functional mechanics and mathematical models of original online casino games developed by RSI’s in-house game studio. The Game Designer defines features, bonus structures, paytable economics, and underlying math models that determine how games play, perform, and engage players, while also contributing to the design and optimization of site-wide promotional and gamification mechanics that reflect the RSI brand. The Game Designer owns the full functional design-to-model lifecycle for each game, from initial concept and feature design through mathematical modeling, PAR sheet creation, simulation validation, and iterative tuning, in close collaboration with engineering, product, and creative teams. The position requires deep expertise in casino game mathematics and mechanics design, as well as the ability to develop compliant games within a fast-paced, regulated environment while delivering engaging, commercially viable player experiences aligned with the RSI brand. What You'll Do: Design and define the functional mechanics for original online casino games, including base game structures, bonus round triggers and flows, progressive jackpot systems, gamble features, cascading/grid-style mechanics, and meta-game experiences Build the complete mathematical models for each game, including RTP targets, volatility profiles, hit frequency, standard deviations, prize distribution, and payout structures Create and maintain PAR sheets, combination sheets, and all regulatory math documentation required for internal review, testing laboratory
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