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Betty

Casual, real-money online slots platform

Machine Learning Engineer

Applied Machine LearningConfirmed live in the last 24 hours
Full-timeSofia, BulgariaIn-person

About the Job

Requirements

  • At least 3 years of experience as a data scientist or machine learning engineer.
  • Strong knowledge of statistics and machine learning methods, including predictive modeling, classification, clustering, regression, and optimization.
  • Advanced Python skills and strong software engineering practices, including testing, code review, and Git, plus advanced SQL with Redshift or a comparable cloud data warehouse.
  • Proven experience deploying and running machine learning models in production, including continuous integration and delivery, containers such as Docker, model versioning, automated retraining, and monitoring for drift and performance.
  • Hands-on experience building large language model and generative AI solutions, such as retrieval-augmented generation, AI agents and tool use, prompt engineering, and natural language processing.
  • Experience with large language model APIs and frameworks, and evaluating AI outputs for accuracy, reliability, and cost.
  • Good judgment about when AI adds value and when a simpler method is more appropriate, and keeping up with new models and tools.
  • Proven experience applying models to business problems such as forecasting, segmentation, lifetime value, retention, churn, or engagement.
  • Experience working with large datasets of 100 million or more rows and many variables.
  • Ability to work with messy, incomplete, and changing data and still produce reliable results.
  • Ability to explain complex work clearly to people who do not need the technical detail and to manage expectations honestly.
  • Fluent written and spoken English.

Responsibilities

  • Design, build, and ship large language model-based AI solutions, including AI agents, retrieval-augmented generation, and automated analysis and reporting, for teams across the business.
  • Help shape the company's adoption of AI by identifying high-value use cases, evaluating models and tools, and establishing checks for accuracy, reliability, and cost-effectiveness.
  • Partner with marketing and user acquisition teams on channel and campaign performance using metrics such as customer acquisition cost, return on ad spend, cost per acquisition, first-time depositors, conversion rates, and predicted lifetime value.
  • Build marketing models for predicted lifetime value of newly acquired players, attribution, marketing mix modeling, incrementality measurement, and channel budget allocation.
  • Work with analysts, marketing, product, and business stakeholders to turn business questions into clear requirements, success metrics, and use cases.
  • Work with large event-level data in Redshift and combine and clean internal and external data from player activity, transactions, payments, customer relationship management, and marketing platforms.
  • Build statistical and machine learning models for player lifetime value, churn and retention, segmentation, forecasting, and driver analysis.
  • Form and test hypotheses about player and commercial behavior and turn findings into clear recommendations, including their effects on players.
  • Identify opportunities and inefficiencies across player segments, games, providers, payment flows, and channels, and perform deep dives to support product launches and marketing campaigns.
  • Support experimentation and A/B testing by defining success metrics, analyzing results, and determining when results are meaningful.
  • Take models from prototype to production and own them end to end, including scheduled batch jobs and real-time inference where needed.
  • Build and run real-time pipelines to stream player events, compute features on live data, and serve low-latency predictions such as real-time churn and retention signals.
  • Establish MLOps foundations, including continuous integration and delivery for models, model registry and versioning, a feature store, automated retraining, and monitoring for drift, data quality, and model performance.
  • Present results through dashboards and clear recommendations to audiences up to the C-level.
  • Help other teams use data and AI through self-service analytics and shared environments where they can safely deploy their own AI tools.
  • Work within regulated-market rules, including responsible gambling and data privacy requirements.

Desired Qualifications

  • Strongly preferred: experience with marketing data and terminology, including user acquisition, customer acquisition cost, return on ad spend, first-time depositors, attribution, marketing mix modeling, incrementality, predicted lifetime value, and campaign and creative performance.
  • Experience in online casinos or in iGaming, sports betting, gaming, fintech, or another high-volume consumer business.
  • Hands-on experience with Tableau or a comparable business intelligence tool.
  • Experience with streaming data and real-time machine learning, including event streaming with Kafka, Flink, or similar tools, live feature computation, and low-latency model serving through APIs.
  • Hands-on experience with MLOps and orchestration tools such as MLflow, Airflow, Kubernetes, Terraform, or a feature store.
  • Experience working with APIs and third-party data sources.
  • Experience running large language model applications in production, including vector databases, agent frameworks, output evaluation, and cost monitoring.

About the Company

Betty

Casual, real-money online slots platform

Betty is a real-money online casino and mobile gaming company focused on casual players, especially women who enjoy slots. Its platform offers slots from top providers like NetEnt, Pragmatic Play, and Red Tiger and operates Betty.ca in Ontario under an iGaming license, delivering a safe, transparent, community-driven slots experience. The product lets players fund accounts, spin slots, and win within a regulated market, with responsible-gaming features and gamified elements. Betty aims to scale globally through a decentralized franchise model, licensing its technology and branding to local operators while developing its own IP and games, positioning itself as the global franchise-style iCasino brand.

Company size
201-500
Company stage
Debt Financing
Total funding
$25.5M
Headquarters
Toronto, Canada
Founded
2022

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