Senior Data Scientist (Fintech)

TL;DR

Senior Data Scientist (Fintech): Developing and validating end-to-end fraud detection machine learning models for large-scale transaction systems with an accent on model risk management, conceptual soundness, and feature engineering. Focus on challenging first-line methodologies, building agentic AI validation tools, and ensuring compliance with regulatory and fairness standards.

Location: Must be based in or able to work from Stockholm or Milan (Hybrid)

Salary: 752,814 SEK - 1,076,536 SEK per year

hirify.global is a global fintech leader providing payment and shopping services.

What you will do

• Perform independent end-to-end validation of fraud detection ML models across the entire lifecycle.
• Review and challenge methodologies, assumptions, and implementations of fraud detection techniques.
• Build and deploy agentic AI tools to automate validation workflows and surface model risks.
• Assess model performance, stability, drift, and retraining strategies using fraud-specific metrics.
• Analyze large-scale transaction datasets to evaluate data representativeness, leakage risks, and bias.
• Collaborate with stakeholders to communicate model risks and document outcomes per governance standards.

Requirements

• Master’s or PhD in a quantitative field such as Data Science, Statistics, or Computer Science.
• 3+ years of hands-on experience in fraud-related modeling.
• Expertise in ML methods including tree-based models, anomaly detection, and graph/network models.
• Strong programming proficiency in Python and SQL with experience in PySpark.
• Familiarity with cloud-based ML platforms and production deployment workflows.
• Solid understanding of model validation principles and regulatory requirements.

Nice to have

• Experience in transaction-heavy financial products like BNPL or credit cards.
• Background in validating models within highly regulated environments.
• Experience mentoring junior team members or leading validation reviews.
• Familiarity with AI governance frameworks and emerging regulations.

Culture & Benefits

• Work in a collaborative international environment focused on high-impact financial solutions.
• Opportunities to influence AI governance and model risk standards in a regulated fintech setting.
• Engagement with cutting-edge tools including GenAI and automated validation frameworks.
• Commitment to technical excellence and cross-functional transparency.