Lead Data Scientist, Python

We’re united by authentic connection, shared purpose, and a deep commitment to the global community we serve. Here, flexibility and belonging go hand in hand with high performance. Driven by our core values, we believe the best ideas come from empowered teams: those who consistently collaborate with intention to design solutions, spark ideas, and drive impact. TKWW is looking for a Lead Data Scientist to join our team of data professionals supporting our Marketplace. The Lead Data Scientist will play a critical role in shaping data strategy, guiding experimentation, and driving impact through advanced analytics. They will partner with cross‑functional teams—including product managers, engineers, and business stakeholders—to design experiments, develop analytical tools, and ensure we are making data‑driven decisions that deliver measurable results. As a trusted advisor and mentor, this person will both lead analyses directly and elevate the work of the broader team. Gather, analyze, and interpret data to deliver business impact and help the organization make informed decisions Apply advanced statistical and machine learning techniques (e.g., hypothesis testing, regression, classification, clustering, forecasting, causal inference) to uncover insights and guide strategy Design and analyze A/B and multivariate testing experiments; Design, build, and maintain reusable, scalable data products and self‑serve capabilities used by multiple internal teams Translate analyses into clear, actionable recommendations, linking insights to business outcomes such as ROI, conversion, retention, and revenue Maintain a deep understanding of the product, relevant data assets, and the outcomes of past experiments and analyses Identify opportunities for new data products and integrations, prioritize a backlog of data assets and use cases, and collaborate with business partners to implement them SUCCESSFUL LEAD DATA SCIENTIST CANDIDATES HAVE: ~ Demonstrated ability to influence stakeholders and drive alignment through data‑driven insights and recommendations ~ Advanced knowledge of statistics, including hypothesis testing, regression, causal inference, and forecasting ~ Hands‑on experience with experiment design, analysis, and rollout of A/B and multivariate tests ~ Advanced SQL skills and ability to write efficient, production‑ready queries ~ Strong Python skills for data manipulation, visualization, and advanced analysis ~ Knowledge of data modeling and experience partnering with engineers on data infrastructure ~ Experience prioritizing and managing analytical work, data assets, or product backlogs in a cross‑functional environment ~ 5+ years of experience in data science or advanced analytics, with some prior leadership, mentorship, or project ownership experience Private health insurance Tax relief options: pre‑tax savings for food, transport, daycare and work related training expenses Personal time off: 23 working days of holidays per year + additional days each year considering the application of the max. Work from home allowance (40€/month) Local events TKWW University for Employee & Leader development This role is ‑eligible and based near one of our office hubs. Starting September 15, 2025, you’ll be expected to work in the office two days a week as part of our hybrid work model. At The Knot Worldwide, we believe you are more than a resume and invite you to go for it, take the leap of faith, and apply for this job. Together, we have an incredible opportunity to make it even easier for our customers to plan life’s most meaningful moments and for our small business owners to grow and scale. You lead with head and heart, and build what matters for life's most meaningful moments. You don't just accept how it's been done, but boldly define how it should be. From mental wellbeing, physical health and financial planning, to engaging perks and discounts, we are in the business of celebrating and supporting the Moments that Matter, both in and out of the office. is our approach to hybrid work. For ‑eligible roles, this includes regular in‑office time to foster collaboration and connection. For roles not eligible for in‑office expectations, we support connection through virtual collaboration and intentional gatherings. To facilitate in‑person collaboration, we have office spaces in Barcelona, Spain; In addition to federal law requirements, The Knot Worldwide complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. The Knot Worldwide expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. 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