Senior Data Analyst I

We are looking for a Senior Data Analyst to lead analytics and evaluation efforts for search and retrieval systems. You will own key analytical workflows, define measurement strategies, and generate insights that directly improve ranking quality, relevance, and user experience., Search Evaluation & Analytics

• Perform a leading role in analysis of search and retrieval system performance, including ranking quality and relevance.
• Help define and standardize search evaluation metrics (e.g., NDCG, MAP, recall, precision, CTR).
• Analyze query behavior, user interaction signals, and content performance to identify optimization opportunities.
• Conduct deep-dive analyses on ranking performance, query intent, and retrieval gaps.
• Support evaluation of downstream applications (including GenAI-powered features) where they depend on retrieval quality.

Experimentation & Reporting

• Help design and lead A/B testing and experimentation frameworks for search and ranking improvements.
• Partner with product and data science to define success metrics and experiment strategies.
• Ensure statistical rigor in experiment design, analysis, and interpretation.
• Build reusable experimentation templates and scalable analysis workflows.

Data Visualization & Communication

• Own and evolve dashboards and reporting systems tracking search performance and user engagement.
• Develop clear, actionable data storytelling to communicate insights to technical and business stakeholders.
• Enable self-service analytics for partners through well-designed reporting tools.

Data Management & Tooling

• Work with large-scale datasets using modern platforms (e.g., Databricks, Spark, SQL-based systems).

• Ensure high standards for data quality, metric consistency, and instrumentation reliability.

• Collaborate with engineering to improve logging, tracking, and observability of search systems. Cross-functional Impact & Mentorship

• Act as a key analytics partner to search data scientists, engineers, and product teams.

• Help elevate the team's understanding of retrieval performance and measurement frameworks.

This role is ideal for someone with deep experience in search analytics, experimentation, and data visualization, who can operate with high autonomy and influence decision-making across cross-functional teams., * Master's or PhD in Data Analytics, Statistics, Computer Science, or a related field (or equivalent practical experience)

• ~3-5+ years of experience in data analysis, business intelligence, or analytics roles
• Strong proficiency in SQL and Python for large-scale data analysis
• Advanced experience with data visualization and BI tools (e.g., Tableau, Power BI, Looker, matplotlib, seaborn)
• Experience working with Databricks or similar large-scale data platforms
• Strong understanding of experimentation design, A/B testing, and statistical analysis
• Experience defining and analyzing search/retrieval metrics (e.g., NDCG, recall, precision, ranking metrics)
• Proven ability to translate complex data into actionable insights and influence decisions, * PhD in Data Analytics, Statistics, Computer Science, or a related field (or equivalent practical experience)
• Experience working on search, ranking, or recommendation systems
• Familiarity with information retrieval concepts (e.g., indexing, ranking, query understanding)
• Exposure to clickstream data, user behavior analytics, and event tracking systems
• Experience supporting evaluation of ML-based ranking or retrieval systems
• Familiarity with RAG systems or GenAI applications

Join our team and contribute to a culture of innovation, collaboration, and excellence. If you are ready to advance your career and make a significant impact, we encourage you to apply. Work in a way that works for you We promote a healthy work/life balance across the organization. We offer an appealing working prospect for our people. With numerous wellbeing initiatives, shared parental leave, study assistance and sabbaticals, we will help you meet your immediate responsibilities and your long-term goals. * Flexible working hours - flexing the times when you work in the day to help you fit everything in and work when you are the most productive. Working for you We know that your well-being and happiness are key to a long and successful career. These are some of the benefits we are delighted to offer: * Dutch Share Purchase Plan * Annual Profit Share Bonus * Comprehensive Pension Plan * Home, office or commuting allowance * Generous vacation entitlement and option for sabbatical leave * Maternity, Paternity, Adoption and Family Care leave * Flexible working hours * Personal Choice budget * Variety of online training courses and career roadshows * Wellbeing programs and gym facility in the office * Internal communities and networks * Various employee discounts * Recruitment introduction reward * Work from anywhere * Employee Assistance Program (global) About the business As a global leader in information and analytics, we help researchers and healthcare professionals advance science and improve health outcomes for the benefit of society. Building on our publishing heritage, we combine quality information and vast data sets with analytics to support visionary science and research, health education, and interactive learning, as well as exceptional healthcare and clinical practice. At Elsevier, your work contributes to the world's grand challenges and a more sustainable future. We harness innovative technologies to support science and healthcare to partner for a better world., RELX is a global provider of information-based analytics and decision tools for professional and business customers, enabling them to make better decisions, get better results and be more productive. Our purpose is to benefit society by developing products that help researchers advance scientific knowledge; doctors and nurses improve the lives of patients; lawyers promote the rule of law and achieve justice and fair results for their clients; businesses and governments prevent fraud; consumers access financial services and get fair prices on insurance; and customers learn about markets and complete transactions. Our purpose guides our actions beyond the products that we develop. It defines us as a company. Every day across RELX our employees are inspired to undertake initiatives that make unique contributions to society and the communities in which we operate.