Head of Fraud & Risk

About Poshmark

Poshmark is a leading fashion resale marketplace powered by a vibrant, highly engaged community of buyers and sellers and real-time social experiences. Designed to make online selling fun, more social and easier than ever, Poshmark empowers its sellers to turn their closet into a thriving business and share their style with the world. Since its founding in 2011, Poshmark has grown its community to over 130 million users and generated over $10 billion in GMV, helping sellers realize billions in earnings, delighting buyers with deals and one-of-a-kind items, and building a more sustainable future for fashion. For more information, please visit www.poshmark.com, and for company news, visit newsroom.poshmark.com.

Poshmark is seeking an experienced and strategic Head of Fraud & Risk to lead our efforts in protecting the integrity of our marketplace and community. You’ll own the end-to-end fraud and risk strategy, spanning prevention, detection, and mitigation across payment/transactional fraud, account security, and content integrity.

In this high-impact leadership role, you will shape the long-term vision and guide cross-functional teams that safeguard millions of users while maintaining a seamless, trusted experience across the platform.

Responsibilities

Define and execute the company’s overarching fraud and risk strategy to prevent and mitigate threats across all stages of the user journey. Risk types include credit card fraud, account takeovers, phishing, user generated listing and comment spam, transaction abuse, referral gaming, and chargeback prevention.
Partner with Product, Engineering, and Data to define and deliver the fraud and risk product roadmap. Measure and iterate on new features that enhance detection, automation, and user experience.
Identify, evaluate, and manage relationships with third-party risk and fraud service providers. Lead contract negotiations to ensure optimal performance, value, and alignment with business goals.
Develop and optimize processes and rules that minimize financial losses, improve automation, strengthen detection accuracy and drive greater review efficiency across fraud operations.
Work across Payments, Compliance, Product, and Security teams to proactively identify and mitigate risk in upcoming features or platform changes.
Build, mentor, and scale a high-performing fraud & risk team of 17+. Provide clear direction, development, and career growth opportunities. Oversee team of 60+ contractors who review flagged/risky user generated content.
Champion a culture of trust and integrity across the organization and drive initiatives that enhance marketplace safety and user confidence.

Qualifications

Bachelor’s degree required; advanced degree (MS, MBA) a plus.
12+ years of experience in fraud, trust & safety, risk management, or related functions within e-commerce, fintech, or marketplace environments.
Deep understanding of fraud detection systems, risk analytics, and third-party tools.
Exceptional leadership, communication, and problem-solving skills with a data-driven approach.
Demonstrated ability to influence product and engineering teams to design scalable, risk-mitigated systems.
Passion for user safety, platform integrity, and building community trust.
Collaborative, low-ego leader with a growth mindset.
Experienced in managing and developing large teams.