Responsibilities

• Lead end-to-end GTM for seller-facing features and platform initiatives — positioning, messaging, channel strategy, launch execution, and measurement.
• Translate product capabilities into crisp seller 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.
• Seller Lifecycle Marketing — Design, optimize, and scale seller 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 seller outcomes.
• Partner with CRM and Growth teams to develop lifecycle journeys across email, push notifications, in-app messaging, and other owned channels.
• Seller Positioning & Messaging — Develop and maintain seller-facing messaging frameworks, value propositions, and positioning strategies that reinforce Poshmark’s differentiated marketplace offering.
• Customer & Competitive Insights — Be the internal authority on seller motivations, segments, and behaviors grounded in qualitative research, data, and direct community engagement.
• Cross-Functional Leadership — Act as a strategic bridge between Product, Growth, Creative, CRM, and Community teams.

Requirements

• 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 seller, 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, seller-facing copy, internal briefs, exec comms. Can adapt voice and message for different seller segments and channels without losing clarity or conviction.

Preferred

• Background in resale, fashion, or peer-to-peer marketplace businesses.
• Hands-on experience with Klaviyo or a comparable lifecycle platform.
• Familiarity with seller education, community-led growth, or organic discoverability strategies.
• Prior experience managing or formally mentoring PMMs.