Machine Learning Engineer

Sardine is a leader in fraud prevention and AML compliance, utilizing advanced technologies to combat identity fraud and payment scams. The Machine Learning Engineer will design systems for fraud detection, build and optimize data pipelines, and deploy ML models to ensure reliable and efficient operation in production environments.

Responsibilities:

• Build and optimize data pipelines and backend services to process device and behavioral data in real time
• Develop and deploy ML models for fraud detection, ensuring they run reliably and efficiently in production
• Turn raw data into production-ready features that feed our fraud detection systems
• Collaborate with platform and backend engineers to integrate models seamlessly
• Maintain high standards of security, privacy, and compliance
• Champion best practices in testing, documentation, and observability

Requirements:

• 5+ years in software engineering, with strong backend experience (Go or Python)
• Hands-on experience with applied ML using large datasets (PyTorch, Scikit-learn, etc.)
• Strong SQL skills and familiarity with relational and non-relational databases
• Experience with end-to-end ML systems: feature pipelines, model deployment, monitoring, and iteration
• Excellent communication skills in English, both written and verbal
• Bachelor's or Master's in Computer Science, Engineering, or a related discipline
• Domain knowledge in fraud, risk, or cybersecurity
• Familiarity with CI/CD, Docker, Kubernetes and the modern devops framework
• Understanding of modern browser APIs and high-entropy data collection techniques
• Familiarity with leveraging frontier LLMs for automation