Sr. Manager, Product Marketing

Poshmark is the leading fashion marketplace where style comes alive through discovery, self-expression, and human connection. Powered by a vibrant community of 165 million members, Poshmark brings real people and taste to shopping through a social experience shaped by shared discovery. Buying and selling fashion feels simple, joyful, and personal, while every item tells its own story. Poshmark empowers sellers to grow meaningful businesses, keeps fashion in circulation longer, and gives shoppers access to unique and trusted finds, from everyday pieces to one-of-a-kind vintage and luxury.

Poshmark is seeking a strategic and execution-oriented Sr. Manager, Product Marketing to lead go-to-market initiatives and lifecycle marketing programs that drive customer growth, engagement, and retention across the marketplace.

This role sits at the intersection of Product, Growth, Creative, and Community, translating platform capabilities into clear, compelling customer value propositions and customer experiences. The Sr. Product Marketing Manager will own the launch strategy and communications for new features and platform updates, while also developing lifecycle strategies that support customers from onboarding through long-term engagement and success.

We're looking for a Sr. Product Marketing Manager who has done real PMM work: building positioning from the ground up, running end-to-end launches, designing lifecycle programs that change behavior, and generating insights that help shape the product roadmap. You'll own customer GTM and lifecycle strategy, partner closely with Product, CRM, and Growth, and help raise the bar for how this team operates.

The ideal candidate combines strong product marketing fundamentals with growth thinking, customer empathy, and exceptional communication skills. This individual deeply understands buyer and customer motivations and marketplace dynamics and knows how to create messaging, education, and lifecycle programs that drive adoption, activation, and retention.

• Lead end-to-end GTM for features and platform initiatives — positioning, messaging, channel strategy, launch execution, and measurement.

• Translate product capabilities into crisp customer value propositions that drive adoption and behavior change.

• Partner with Product, Creative, CRM, and Growth to ship launches that hit business targets, not just ship dates.

• Design, optimize, and scale customer lifecycle programs across onboarding, activation, engagement, retention, and reactivation stages.

• Identify key behavioral moments and intervention opportunities where communication, education, or product awareness can improve customer outcomes.

• Partner with CRM and Growth teams to develop lifecycle journeys across email, push notifications, in-app messaging, and other owned channels.

• Develop and maintain customer-facing messaging frameworks, value propositions, and positioning strategies that reinforce Poshmark’s differentiated marketplace offering.

• Create channel-specific messaging and copy that effectively communicates customer benefits, platform capabilities, and community value.

• Ensure consistency of voice, positioning, and customer education across customer touchpoints and campaigns.

• Be the internal authority and expert on customer motivations, segments, and behaviors — grounded in qualitative research, data, and direct community engagement.

• Leverage qualitative research, behavioral data, and marketplace insights to inform product marketing and lifecycle strategies and value proposition that reflect Poshmark’s unique marketplace positioning

• Monitor the competitive landscape for customer tools and experiences; translate findings into strategic recommendations.

• Act as a strategic bridge between Product, Growth, Creative, CRM, and Community teams.

• Translate product priorities into actionable marketing briefs and customer communication plans.

• Influence cross-functional stakeholders through strong collaboration, strategic thinking, and customer-centered advocacy.

• Model what excellent PMM work looks like — sharp briefs, rigorous positioning, outcome-oriented launches — for a team that is developing its craft.

• Contribute to how the PMM function operates: processes, frameworks, and standards that scale beyond any one project.

• Own and ship at least 2 customer-facing launches end-to-end, from positioning through post-launch measurement.

• Complete a customer lifecycle audit and deliver a prioritized roadmap of communication and engagement improvements.

• Establish yourself as the go-to customer expert internally — trusted by Product, CRM, Growth and Community

• Independently manage customer-facing go-to-market launches from positioning through execution.

• Successfully onboard into Poshmark’s customer ecosystem, product roadmap, and lifecycle marketing infrastructure.

• Become a trusted strategic partner for customer growth, lifecycle strategy, and product launch planning.

• Lead impactful go-to-market initiatives that drive measurable improvements in customer adoption, activation, retention, and engagement.

• Develop scalable lifecycle frameworks and messaging systems that support long-term customer success and marketplace growth.

• Influence customer product experiences through customer insights, behavioral analysis, and clear POV on what customers need.

• Strengthen Poshmark’s customer value proposition and competitive positioning within the resale and marketplace landscape.

• Establish operational excellence across launch planning, lifecycle execution, and cross-functional communication processes.

• Drive measurable improvement in customer activation, engagement, and retention through GTM and lifecycle programs.

• Actively elevate the PMM craft on the team — through feedback, shared frameworks, and leading by example.

• 5–8 years of experience in Product Marketing, Product Management, Lifecycle Marketing, or related strategic marketing functions with a track record of doing the core work: positioning, launch strategy, lifecycle programs, customer insights.

• Strong experience leading both go-to-market initiatives and lifecycle or retention programs within a consumer app, marketplace, platform, or e-commerce environment.

• Experience marketing to customer, creator, supply-side, or marketplace communities and understands what motivates them.

Go-to-Market

• Proven GTM instincts — can build positioning from scratch, develop messaging hierarchies, plan and execute launches end-to-end, and measure what matters.

• Knows how to write a creative brief that actually guides the work, and a positioning doc that holds up under cross-functional scrutiny.

Lifecycle & CRM

• Deep familiarity with lifecycle channels — email, push, in-app — and the behavioral data that informs when, what, and who to message.

• Has designed programs that change behavior across a user journey, not just sent campaigns.

Strategy & Influence

• Sharp strategic thinker who can develop a point of view from ambiguous inputs and bring leadership along.

• Comfortable operating without a full playbook — can set direction, make judgment calls under pressure, and create structure where there isn’t any.

• Strong enough instincts to coach others on PMM craft, not just execute it themselves.

Communication & Writing

• Exceptional writer across formats — positioning docs, customer-facing copy, internal briefs, exec comms.

• Can adapt voice and message for different customer segments and channels without losing clarity or conviction.

• Background in resale, fashion, or peer-to-peer marketplace businesses.

• Hands-on experience with Klaviyo or a comparable lifecycle platform.

• Familiarity with customer education, community-led growth, or organic discoverability strategies.

• Prior experience managing or formally mentoring PMMs.