Data Scientist - Ads Marketplace

Nextdoor

4h•$153,000 - $208,000•Hybrid

About The Position

As a Data Scientist at Nextdoor, you will help design and oversee product experiments and own complex analyses to drive company and product strategy. We use a semi-embedded team structure, in which a group of data team members works on a specific product or pillar, interfacing directly with product and engineering stakeholders. The Data Science group consists of people from a diverse set of backgrounds and perspectives, trained in fields as wide-ranging as economics, physics, statistics, and operations research. We are an integral part of the product development organization and play an active and collaborative role in building and improving the product. At Nextdoor, we operate in an AI-first environment and expect every team member to actively use AI tools as part of their workflow. We aren't looking for prompt engineers; we’re looking for people who use tools like Claude, Gemini, ChatGPT, and Glean to challenge their own thinking and take full ownership of AI-assisted outputs. We also offer a warm, inclusive work environment that embraces a hybrid employment model and provides flexibility for our valued employees. The hiring team will go over these expectations with you if you are being considered for a role near one of our offices in San Francisco, Los Angeles, Chicago, Dallas, New York, and London.

Requirements

4+ years of relevant Data Science experience
Experience in Ads Marketplace and/or Monetization experience
Experience architecting, debugging, and executing complex SQL queries
Excellent knowledge of Python, including common scientific computing packages and data science tools such as numpy, pandas, and scikit-learn
Experience formulating, running, and sharing complex analyses, including different types of experiments, causal inference studies, and other exploratory analysis work
Innate curiosity around finding meaningful insights that inform the way we think about and develop both our product and our business strategies
Eagerness to explore and apply AI and emerging technologies to reimagine how work gets done

Nice To Haves

Work experience related to social or community-based products
Work experience related to small businesses and marketplaces
Work experience related to advertising and auction systems
Experience with agentic coding platforms such as Cursor or Windsurf

Responsibilities

Design and develop algorithms and models to optimize Ads Marketplace performance, driving value for both end-users and Advertisers
Experiment design: Make sure we run experiments efficiently and accurately, including monitoring early feature development through tracking post-release follow-ups
Develop and share key strategic insights through data analysis, including designing experiments and evaluating the performance and impact of data-driven content
Partner with cross-functional teams to support product development efforts (including product, design, engineering, marketing, and operations)
Participate in in-person Nextdoor events such as trainings, off-sites, volunteer days, and team-building exercises
Build in-person relationships with team members and contribute to Nextdoor’s company culture