Senior Data Scientist

The Senior Data Scientist will support the ongoing maintenance, monitoring, and improvement of production analytics and machine learning solutions offered to the clients in North America. You will ensure that models and data processes remain accurate, reliable, compliant, and aligned with business and client requirements. It focuses on operational performance, issue resolution, and continuous improvement of existing solutions. You will report to Director of Data Science and Gen AI. What you'll do: • Analyze, process, and document large datasets; select appropriate analytical, machine learning, and data mining techniques to identify useful insights. • Develop and maintain data structures, storage schemes, processing tools, and analytical pipelines. • Monitor model performance and stability across use cases; conduct validation, back-testing, and performance reporting. • Investigate data and model issues, identify root causes, and implement corrective actions or model updates. • Maintain documentation, version control, audit trails, and data quality practices in support of governance and compliance requirements. • Assess model outputs, conduct ROI and benefit analyses, and present findings on model performance and analytical processes, develop best practices and business assumptions that support reliable solutions and consistent model performance. What we're looking for: • Strong grasp of probability, statistical inference, optimization algorithms, linear algebra, and calculus. • Understanding how and when to apply key analytical approaches including regression analysis, machine learning, AI, deep learning and other advanced modeling approaches to extract and automate insights from data • Strong grasp of techniques for model cross-validation and penalizing unnecessary complexity, including regularization, Bayesian shrinkage, in-sample vs out-of-sample. Fluency with statistical significance tests and Monte Carlo simulation. • Ability to write near-production-level code in at least one general purpose programming language (e.g. Python, C++). • Understanding of modern technologies in processing of large data sets, including Apache family (Hadoop, Spark), latest database technologies (e.g. Graph databases, time-series databases), and natural language processing and other tools for the parsing of unstructured data. What you'll get: • Personal Development - career pathway for professional growth supported by learning and development programs and unlimited access to online educational training courses, learning materials and book. • Work environment - excellent work conditions with friendly environment, recognized team spirit, and fun and quality recreation time. • Social benefit package including life insurance, food vouchers, additional health insurance, monthly flex allowance and internet coverage, corporate discounts, marriage and childbirth / adoption allowance, Multisport card, Sharesave plan, Employee assistance program, а birthday gift and many other benefits! • Work-life balance - 25 days paid vacation, 1 additional day off for your birthday and extra 3 paid days for participation in Social responsibility event. • Opportunity for Flexible working hours and Home Office.   Experian is an Equal opportunity employer. Everyone can succeed at Experian and bring their whole self to work, irrespective of their gender, ethnicity, religion, colour, sexuality, physical ability or age. If you have a disability or special need that requires accommodation, please let us know at the earliest opportunity. #LI-Hybrid Our uniqueness is that we celebrate yours. Experian's people first, inclusive and purpose driven culture is multi award-winning; World's Best Workplaces™ 2025 (Fortune Global Top 25), Great Place To Work™ in 26 count