Senior Product Marketing Manager Fulltime Marketing San Francisco $165k-200k + Equity 5/13/2026

LightSource is building the next-generation operating system for Procurement. Sales has Salesforce. HR has Workday. Procurement is next. We build SaaS software that helps procurement leaders discover vendors, manage negotiations, and buy intelligently. Our team is small but growing quickly, backed by top-tier investors and already winning enterprise customers. We're tackling a massive market filled with complex, high-impact problems. The team includes people who've helped build companies like Tesla, Waymo, McKinsey, and Google X. We hire exceptional people, move quickly, give direct feedback, expect excellence, and have a lot of fun doing it. About the Role We're looking for a Senior Product Marketing Manager — someone who can own how LightSource is understood in market and help build the PMM function from the ground up. This isn't a typical PMM role. You won't inherit someone else's positioning — you'll sharpen and own it. You'll work closely with product, sales, and leadership to craft messaging that lands with procurement and operations leaders, and produce the content that puts those ideas in front of the right people. The right person will combine strategic depth with a writer's instincts and a builder's work ethic. You know how to market technical products to skeptical industrial buyers — and you've found a way to do it credibly. You will be the person who defines how LightSource is talked about, sold, and remembered. Role & Responsibilities Own and continuously refine LightSource's positioning, messaging architecture, and ICP definition Develop buyer personas grounded in real customer and prospect research, win/loss interviews, sales call analysis, and market study Drive product launches end to end: messaging, internal enablement, external assets, and coordinated rollout with sales and demand gen Build and maintain a core sales enablement library: one-pagers, battlecards, objection handling guides, and ROI frameworks Own the content strategy and editorial calendar — set priorities, write or commission key pieces, and maintain quality across all formats Write thought leadership content (long-form, point of view, research-backed) that builds LightSource's credibility in supply chain and procurement circles Partner with demand gen on campaign messaging, AEO visibility, and analyst and press narratives Track competitive positioning and maintain clear, current battlecards Help hire and mentor future PMM and content hires as the team grows About You You're not looking to maintain a positioning doc someone else wrote — you want to own the narrative. You've done this for a technical product with a complex buying process and you know how to bring rigor and creativity to both. You're a strong writer who doesn't lose precision when translating capability into value. You thrive in environments where strategic thinking and getting your hands dirty are equally expected. You might be a great fit if you: Have 5–8 years in product marketing or content marketing at a B2B SaaS company Are a strong writer who can translate technical capabilities into business value without losing precision or credibility Have a track record of conducting and applying buyer research to improve messaging and win rates Have experience supporting enterprise or mid-market sales cycles with high-quality enablement materials Are comfortable leading cross-functional workstreams — you know how to align product, sales, and marketing without owning everything Thrive in fast-moving startup environments with high autonomy and high expectations Want to grow into leadership and help build a team over time Value direct feedback and continuous improvement Top-of-market base compensation with meaningful early-employee equity Platinum-level healthcare, 100% covered for employees Dental and vision, 100% covered 401(k) program Unlimited vacation and sick days Free food (3 meals a day, if desired) in office locations Frequent team offsites, events, dinners, and weekend trips Bonus Points Background in or deep familiarity with supply chain, procurement, or industrial operations Experience marketing AI or data intelligence products to non-technical buyers #J-18808-Ljbffr Lightsource