Senior Applied AI/ML Scientist - Marketplace Quality

About FaireFaire is a technology wholesale platform built on the belief that the future is local. Independent retailers around the globe collectively represent a multi-hundred-billion-dollar wholesale market that has historically been fragmented and offline. At Faire, we're using the power of tech, data, and machine learning to connect this thriving community of entrepreneurs across the globe. Picture your favorite boutique in town — we help them discover the best products from around the world to sell in their stores. With the right tools and insights, we believe that we can level the playing field so businesses can grow and local communities can thrive.We’re looking for smart, resourceful and passionate people to join us as we power the shop local movement. If you believe in community, come join ours.About this roleFaire leverages the power of machine learning and data insights to revolutionize the wholesale industry, enabling local retailers to compete against giants like Amazon and big box stores. Our highly skilled team of Applied AI/ML Scientists specialize in developing algorithmic solutions for notification and recommender systems, advertising attribution, and LTV predictions. We are dedicated to building machine learning models that help our customers thrive.As a Senior Applied AI/ML Scientist on the Marketplace Quality team, you will own the modeling and measurement that keeps Faire's marketplace trustworthy for the hundreds of thousands of independent brands and retailers on it. Retailers need confidence that the price and the product they see on Faire are the real thing. That means matching Faire's catalog against messy external data at scale, detecting pricing and policy violations with calibrated confidence, and deciding which violations are worth acting on given a finite operations budget. You will work across structured and unstructured data (listing text, product images, external web listings, transaction history) using entity resolution, information extraction, multi-modal LLMs, calibrated classification, constrained optimization, and experimentation. You will drive projects end-to-end from framing through production and measurement, partnering closely with product, engineering, and our marketplace operations team.Our team already includes experienced Applied AI/ML Scientists from Uber, Airbnb, Square, Facebook, and Pinterest. Faire will soon be known as a top destination for data scientists and machine learning engineers, and you will help take us there!What you’ll doOwn applied ML projects end-to-end: framing the problem, building and shipping the model, and measuring impact on the marketplace.Build and improve pricing-integrity models that compare Faire listings against external pricing signals and detect over- and under-pricing violations with a calibrated confidence bar.Solve product matching and entity resolution at scale: link Faire's catalog to external listings using text and image embeddings, retrieval, and multi-modal LLMs, and build the match-quality and gating models that make downstream detection trustworthy.Extract structured attributes from unstructured listing content (descriptions, images, third-party sources) to power detection and enrichment.Turn model scores into action: design the targeting and prioritization logic that ranks violations by expected marketplace impact against the cost of a false positive, under a constrained human-review budget.Build human-in-the-loop systems with our marketplace operations partners: design audits, generate training labels, set precision bars, and close the loop from review outcomes back into the models.Design and analyze experiments for enforcement levers such as downranking, badging, and brand-facing remediation, and measure their effect on retailer trust and marketplace GMV.Partner across product, engineering, operations, and analytics to turn models into shipped product and business impact.Solve challenging problems related to a two-sided marketplace.Qualifications 3+ years of industry experience using machine learning to solve real-world problems.Experience with relevant business problems (e-commerce, marketplaces, catalog and content quality, search, or personalization).Experience with relevant technical methods (deep learning and LLMs, computer vision, information extraction, entity resolution, ranking, and/or experimentation and causal inference).Strong programming skills.An excitement and willingness to learn new tools and techniques.The ability to drive a project end-to-end and lead model development with limited supervision.Strong communication skills and the ability to work in a highly cross-functional team.Great to Haves:Highly recommended: Master's or PhD in Computer Science, Statistics, or related STEM fields.Previous experience with catalog quality, product attribute extraction, computer vision for e-commerce imagery, or search and discovery for a two-sided platform.Experience building and validating LLM evaluation pipelines, including prompt iteration against labeled data and human-in-the-loop workflows.Salary RangeSan Francisco: the pay range for this role is $211,000 to $290,500 per year.This role will also be eligible for equity and benefits. Actual base pay will be determined based on permissible factors such as transferable skills, work experience, market demands, and primary work location. The base pay range provided is subject to change and may be modified in the future.Hybrid Faire employees currently go into the office 3 days per week on Tuesdays, Thursdays, and a third flex day of their choosing (Monday, Wednesday, or Friday). Additionally, hybrid in-office roles will have the flexibility to work remotely up to 4 weeks per year. Specific Workplace and Information Technology positions may require onsite attendance 5 days per week as will be indicated in the job posting. Why you’ll love working at FaireMove fast: You'll own meaningful problems that serve customers around the globe with the agency to move fast and see your results clearly.Equipped to scale: We invest in what matters, including the latest enterprise AI tools, to help you work smarter and get more out of every day.Best in class: Our team is full of sharp, kind, and generous colleagues who care about their craft and about helping you grow in yours.Real rewards. Competitive pay, equity, and comprehensive benefits designed to support your life inside and outside of work.Belonging: We're intentional about building an environment where every Faire employee has equal access to opportunities, growth, and success.Faire was founded in 2017 by a team of early product and engineering leads from Square. We’re backed by some of the top investors in retail and tech including: Y Combinator, Lightspeed Venture Partners, Forerunner Ventures, Khosla Ventures, Sequoia Capital, Founders Fund, and DST Global. We have headquarters in San Francisco and Kitchener-Waterloo, and a global employee presence across offices in Toronto, London, and New York. To learn more about Faire and our customers, you can read more on our blog.Faire provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity or gender expression.Faire is committed to providing access, equal opportunity and reasonable accommodation for individuals with disabilities in employment, its services, programs, and activities. Accommodations are available throughout the recruitment process and applicants with a disability may request to be accommodated throughout the recruitment process. We will work with all applicants to accommodate their individual accessibility needs. To request reasonable accommodation, please fill out our Accommodation Request Form (PrivacyFor information about the type of personal data Faire collects from applicants, as well as your choices regarding the data collected about you, please visit Faire’s Privacy Notice (