Senior Data Scientist (Fraud Analytics)

Location: Sofia, Bulgaria; hybrid remote/in-office

Company

hirify.global is a global data and technology company delivering data-driven solutions across financial services, healthcare, automotive, insurance, and other markets.

What you will do

• Research and develop fraud analytics, digital trust, risk decisioning, device intelligence, behavioral intelligence, and GenAI solutions.
• Analyze large-scale fraud, credit, device, behavioral, and digital-interaction data to identify risk and trust signals.
• Develop fraud models, scores, attributes, device profiles, graph-based capabilities, and analytical tools for the Ascend platform.
• Build scalable data pipelines, automation templates, and production-ready solutions while transitioning prototypes into production or client use.
• Validate model performance, stability, fairness, explainability, and business value.
• Lead analytical and productization workstreams, communicate technical recommendations, collaborate across distributed teams, and mentor colleagues.

Requirements

• 5–7+ years of relevant experience in data science, AI, predictive modeling, or advanced analytics, including complex hands-on innovation and client-focused projects.
• 7+ years of experience developing data and automation pipelines and moving analytical prototypes into monitored, scalable production solutions.
• Strong knowledge of probability, statistics, optimization, linear algebra, calculus, model validation, and advanced machine learning methods.
• Near-production-level Python, plus experience with PySpark and distributed data processing.
• Knowledge of large-scale data technologies, cloud platforms, NoSQL and graph databases, time-series data, unstructured data tools, and LLM or agent-based development frameworks.
• Fluent English and an advanced technical or quantitative degree, or equivalent experience.

Culture & Benefits

• Flexible working hours and home-office options within the hybrid arrangement.
• Professional development programs, career pathways, and access to online courses, learning materials, and books.
• Social benefits including life and additional health insurance, food vouchers, flex allowance, internet coverage, corporate discounts, and a Multisport card.
• 25 days of paid vacation, a birthday day off, and three additional paid days for social responsibility activities.
• Friendly working environment, team activities, employee assistance program, Sharesave plan, and family-related allowances.