Lead Product Marketing Manager in London

Who We Are: We are rebuilding the energy transaction, making it transparent and fair. Our goal is to put power back where it belongs, in the hands of customers and to take on one of the most critical problems of our century, access to low cost electricity. tem exists to fix a broken global energy market that’s long favoured legacy operators, intermediaries, and opaque pricing. Today’s electricity system was not designed for rapid decarbonisation, AI-driven efficiency or fair access for the actual users - businesses and generators. We’ve built the first AI native transaction infrastructure to reinvent how electricity is bought, sold and priced. Our technology is designed to cut out the inefficient fees, automate complex market flows, and bring transparency and fairness to energy transactions at scale.

In late 2025, after extraordinary growth, we closed a $75 million Series B - led by Lightspeed Venture Partners with participation from Albion, Atomico, Allianz, Hitachi Ventures, Schroders Capital and others - positioning us for global expansion, deeper product innovation and category leadership. We’re scaling internationally and building toward a future where AI-driven infrastructure is foundational to electricity markets worldwide. Since launch, our modern utility product, known as RED, has already facilitated thousands of business customers and billions in energy transaction value, proving that modern software and AI can transform an industry built on legacy systems. At tem, we’re not just building another energy company, we’re rearchitecting market infrastructure so that transparency, efficiency and sustainability become the default, not the exception.

The Role: We're hiring a Lead Product Marketer. Your job is to help lead marketing for tem's core energy products, from foundational strategy to world-class execution, and raise the standard of everything that goes out the door. This is an expert role with no direct reports. It exists because our product marketing function needs someone who can own the positioning, build the infrastructure, and set the quality bar for product launches and our underlying product marketing infrastructure.

You will share ownership of tem's product marketing portfolio alongside another senior PMM. Together you support the credibility service across the company, as well as directly supporting our Payments, Invoicing, Integration, Sell, and P442 features, and share responsibility for the foundational infrastructure and PMM framework that supports all engines. You will build the materials commercial teams depend on: ICPs, value propositions, battle cards, messaging docs, product decks, and launch playbooks. You will define how we go to market for new features and products. And you will be the person who makes the whole marketing team better at product marketing through the quality of your thinking and your output.

You work closely with the Product team, Commercial leads, and the Growth Manager. You operate with senior scope and are expected to bring strategic clarity and executional excellence in equal measure.

Responsibilities

• Strategy & Positioning: Own the positioning and messaging for RED and RED Plus across our broker and buyer segments. Build and maintain the foundational product marketing infrastructure: ICP definitions, value propositions, customer segmentation, messaging hierarchies, and positioning documents. Define and evolve our go-to-market approach for new features, products, and segments. Use market knowledge, competitive intelligence, and customer insight to keep our positioning sharp and differentiated.
• Execution & Delivery: Lead the end-to-end production of product marketing materials: battle cards, sales decks, one-pagers, feature explainers, launch assets, and email copy. Set and uphold quality standards for all product marketing output — including work produced by others. Ensure all materials reflect accurate product detail, consistent brand voice, and clear commercial intent. Ship on time and within sprint cycles. Own your commitments.
• Cross-functional Leadership: Partner with Product to get close to the roadmap and translate technical detail into commercial narratives early. Equip commercial teams with the materials and context they need to have better conversations with brokers and buyers. Evangelise product marketing across the growth team: help others understand what good looks like and why it matters. Guide and elevate the work of more junior product marketers when they are in the team.
• Insight & Intelligence: Contribute to ICP development and customer segmentation using first-party data, sales insight, and market research. Stay ahead of how our competitive landscape is shifting and bring that context into positioning decisions. Work AI-natively: use AI tools to accelerate research, drafting, and iteration without sacrificing quality or judgement.

Success Measures

• This role is succeeding when: Foundational product marketing materials exist, and are actively used by commercial teams, and are kept up to date. Commercial teams feel equipped and confident going into conversations with brokers and buyers. Product launches are executed on time with clear, well-crafted collateral. RED's positioning is differentiated, well-understood internally, and resonating with target segments. The quality of product marketing output across the team improves. Sprint delivery rate exceeds 80% of committed tasks. Positioning shows up in pipeline. Pipeline shows up in revenue.

Requirements

• Must haves: Full proficiency in product marketing, developed through considerable experience in a B2B environment. Proven track record of owning positioning, messaging, and go-to-market strategy for a product or product line. World-class writing: you can take complex product or market detail and turn it into copy that is clear, compelling, and accurate. Track record of moving commercial outcomes — not just shipping assets. Experience guiding and elevating the work of others, formally or informally. AI-native: you use AI tools daily to accelerate your work, and you know when to override them. Clear, structured communicator — especially in writing. Operates with senior judgement without needing a management title.
• Bonus points: Experience in energy, fintech, or another regulated or complex sector. Experience working in a product-led business where marketing and product are tightly integrated. Experience building a product marketing function or discipline from an early stage. Familiarity with broker or intermediary channel models. Experience using customer and sales data to sharpen ICP and segment definitions.

Benefits & Perks:

• Salary aligned to internal benchmarks and reviewed twice a year.
• Stock options so everyone has ownership in our mission.
• 25 days holiday plus public holidays. Swap public holidays for the ones that matter most to you, and enjoy your birthday off.
• Remote first and flexible working, with clear core hours and no internal meetings on Friday afternoons.
• Home working and wellbeing budgets: Up to £1,200 or €1,200 per year for your remote setup. Up to £150 or €150 per month for wellbeing.

We welcome applications from people of all backgrounds, experiences, and identities, including those that are traditionally underrepresented in the tech and energy sectors. If you’re excited about this role but not sure you meet every requirement, we’d still love to hear from you. Your unique perspective could be exactly what we’re looking for.