Note: The job is a remote job and is open to candidates in USA. Xsolla is a global commerce company providing tools and services for the video game industry. They are seeking a Principal Machine Learning Engineer to drive innovation in their ML ecosystem and mentor junior engineers while leading complex initiatives.
Responsibilities
- Drive innovation across our machine learning ecosystem
- Architect advanced ML solutions
- Mentor junior ML engineers around the world
- Lead complex ML initiatives
- Elevate engineering standards
- Guide teams as they build scalable, production-ready machine learning systems
Skills
- Advanced Degree in Statistics, machine learning or related areas
- Experience in statistics/ML expertise with a track record of leading high-impact data science initiatives at scale of billions of transactions
- Hands-on experience creating, training and fine-tuning models not just integrating hosted model APIs
- Experience owning models in production: deployment, monitoring, drift detection, retraining — with real latency budgets, not just research notebooks
- Production experience with classical ML for fraud/anomaly detection, recommendation, or churn/LTV (gradient boosting, deep learning, graph-based models)
- Supervised learning, transfer learning on machine learning as well as neural networks
- Basic LLM knowledge, especially how to use it and where not to use it
- MLOps foundations: feature stores, experiment tracking, model registries (MLflow/W&B-class), continuous training pipelines
- Model serving and inference optimization (vLLM-class serving, quantization)
- Publications, conference talks, or recognized open-source contributions to training/eval tooling
- Graph-based fraud detection (fraud rings, device/account linkage)
- Gaming, payments, fraud, advertising domain experience
- Hands-on, up-to-date experience with modern AI tools (e.g., Claude, Copilot, Cursor) for code generation, review, and accelerating day-to-day engineering work
Benefits
- 100% company-paid medical, dental, and vision plans
- Unlimited Flexible Time Off
- A personalized career roadmap for each US employee
- Training and educational opportunities
Company Overview
Company H1B Sponsorship