Senior Data Scientist III

Job description

Key Responsibilities Technical Leadership Lead end-to-end development of advanced AI models (e.g.,LLM, NLP, classification, regression, deep learning). Architect scalable model pipelines and data workflows in cloud-based environments. Establish best practices in model validation, explainability, fairness, and governance. Conduct rigorous experimentation, A/B testing, and performance monitoring. Drive research into emerging AI techniques and evaluate applicability to LexisNexis products. Product & Business Impact Partner with Product, Engineering, and Business stakeholders to translate requirements into analytical solutions. Identify opportunities to enhance risk scoring, entity resolution, legal analytics, fraud detection, compliance monitoring, or related product areas. Present insights and recommendations to senior leadership and non-technical audiences. Ensure models meet regulatory, compliance, and ethical AI standards. Data & Platform Excellence Work with structured and unstructured data, including legal texts, transactional data, and graph-based datasets. Collaborate on data engineering strategies to ensure high-quality, scalable datasets. Optimize model performance for production deployment. Implement monitoring frameworks to ensure model robustness and stability. Mentorship & Influence Mentor and coach junior and mid-level data scientists. Lead code reviews and promote reproducible research practices. Contribute to strategic roadmap planning for data science initiatives. Act as a subject matter expert in advanced analytics within the organization. Required Qualifications Master’s or PhD in Computer Science, Artificial Intelligence, Machine Learning, Natural Language Processing, or a related quantitative field. 8+ years of progressive experience in data science, applied machine learning, or AI engineering roles, with demonstrated ownership of production-grade systems. 3+ years of hands-on experience designing and deploying LLM-based systems or advanced NLP solutions within enterprise-scale products. Strong programming proficiency in Python and deep experience with modern ML/NLP frameworks and tooling. Demonstrated technical expertise in: Deep understanding of LLM capabilities, limitations, and mitigation strategies across commercial (e.g., OpenAI, Anthropic) and open-source models Design and implementation of Retrieval-Augmented Generation (RAG) architectures Agent orchestration frameworks and multi-step tool-using agents Prompt engineering, systematic prompt evaluation, and optimization methodologies Embedding models, vector databases, and semantic retrieval techniques Strong understanding of model evaluation methodologies Proven experience deploying, monitoring, and optimizing AI systems in cloud environments (AWS, Azure, or GCP). Strong written and verbal communication skills in English, with the ability to effectively collaborate across global teams. We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location. We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120. Criminals may pose as recruiters asking for money or personal information. We never request money or banking details from job applicants. Learn more about spotting and avoiding scams here . Please read our Candidate Privacy Policy . We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law. USA Job Seekers: EEO Know Your Rights .