Senior Data Scientist

You'll help build the intelligence layer behind ARQ's financial products, working on some of the most important risk and financial crime challenges. You'll develop machine learning models that detect fraud, prevent losses, and drive better decisions at scale. This is a highly impactful role where you'll take problems from idea to production, partnering with Product, Engineering, and Operations teams to turn large-scale datasets into models that directly influence customer and business outcomes.

Responsibilities

• Design, build, and deploy machine learning models that solve real-world financial crime and risk challenges
• Work on problems such as fraud detection, chargeback prediction, anomaly detection, identity verification, and transaction monitoring
• Transform ambiguous business problems into measurable ML solutions
• Partner closely with Product and Operations teams to define requirements, success metrics, and decision frameworks
• Analyse large datasets to identify patterns, opportunities, and risks
• Build and maintain production-ready data pipelines and model-serving solutions
• Monitor model performance and continuously improve accuracy, reliability, and business impact
• Collaborate with Data Engineering and Backend Engineering teams to operationalise machine learning at scale
• Help shape the future of AI and machine learning capabilities across ARQ

Requirements

• 5+ years of experience across Data Science, Machine Learning, Software Engineering, or related disciplines
• Strong Python skills and experience working with large-scale datasets
• Proven experience developing and deploying machine learning models in production environments
• Strong understanding of supervised learning techniques, particularly classification problems
• Experience with anomaly detection, fraud prevention, risk modeling, or related domains
• Ability to translate business challenges into data-driven solutions
• Experience working cross-functionally with Product, Engineering, and business stakeholders
• Strong communication skills and a pragmatic approach to problem-solving
• Comfortable operating in fast-moving environments with high ownership

Benefits

• Stock options
• Discretionary performance bonus
• The latest tools and technology