Senior Digital Assortment Manager New United Kingdom - Remote in London

Rithum™ is the world’s most trusted commerce network, accelerating how brands, suppliers, and retailers work together to deliver seamless e‑commerce experiences. We provide an unmatched platform for brands and retailers, enabling them to accelerate growth, optimise operations across channels, scale product offerings and enhance margins. Today, more than 40,000 companies trust Rithum to grow their business across hundreds of channels, representing over $50 billion in annual GMV. Using our commerce, marketing, and delivery solutions, our customers create optimised consumer shopping journeys from beginning to end.

Rithum is an AI‑first organization, meaning AI is foundational to how we work, collaborate, and grow. Across all roles, employees are expected to leverage AI to move faster, work smarter, and create repeatable patterns that benefit others. AI proficiency is a core capability, reinforced through clear standards, tooling, and ongoing support. At Rithum, you contribute to advancing our AI‑first ways of working.

As a Senior Digital Assortment Manager – EMEA, you drive growth by enabling assortment expansion strategies for Rithum’s most strategic clients. You partner with client merchants and ecommerce teams to identify 3P assortment opportunities and deliver actionable plans that drive profitable GMV. In EMEA, this role also expands and strengthens the Rithum network by identifying, engaging, and onboarding new brands and suppliers to meet retailer demand and support regional growth.

• Develop and execute assortment expansion strategies to drive revenue growth for Rithum and its clients.
• Act as a trusted advisor to clients, owning engagement objectives and delivering measurable outcomes.
• Analyze performance, trends, and category opportunities to inform assortment recommendations.
• Translate data into clear, actionable plans that optimize assortment and support client demand.
• Partner with Sales, Client Partnerships, and Marketing on merchandising strategies and client presentations.
• Build and scale a network of brands and suppliers across EMEA to support retailer demand and growth targets.
• Identify and onboard new partners through outbound outreach, retailer demand signals, campaigns, and partner ecosystems.
• Use data and AI-enabled tools to prioritize outreach and target high‑potential partners.
• Develop and manage outreach cadences to generate a consistent pipeline of new network participants.
• Establish and optimize scalable processes for partner qualification, onboarding, and activation.
• Partner cross‑functionally to align on target accounts, campaigns, and growth priorities.
• Build and manage relationships with integrators and external partners to expand network reach.
• Track progress against network growth goals, including onboarding, activation, and GMV contribution.
• Leverage analytics and AI-enabled tools to accelerate insights, identify patterns, and improve decision‑making.
• Utilize internal and external data sources to generate insights that inform both assortment and network strategies.
• Partner with Product and Business Intelligence teams as an SME to inform analytics and AI‑driven tool development.
• Identify opportunities to automate workflows and scale impact through AI and repeatable processes.
• Collaborate across teams to share insights, improve processes, and drive consistent execution.

• 3+ years of client‑facing experience in a professional environment building and managing commercial relationships with brands and suppliers.
• 2–3 years of e‑commerce experience in merchandising, wholesale, or retail buying/planning where you held the commercial relationship and negotiated terms.
• Ability to generate pipeline through outreach and manage partner engagement processes.
• Experience in marketplace, supplier acquisition, or network growth environments.
• Experience using AI to analyze data, streamline workflows, or scale impact.
• Experience using AI tools (ChatGPT, Copilot, Claude, etc.) to accelerate and elevate your outcomes; including but not limited to communication drafting, data analysis, prompt engineering, and/or documentation.
• Proficiency in MS Office, particularly Excel.

• Strong understanding of online retail and wholesale/drop ship/commission models.
• Experience with Salesforce / Gainsight / Salesloft or similar CRM tools.
• Strong analytical skills with the ability to synthesize data into insights and actions.
• Proven ability to build collaborative relationships with internal teams and client stakeholders.
• Excellent communication, organization, and time management skills.
• Ability to identify and implement scalable, repeatable processes.

Up to 10%

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

When you join Rithum, you can expect to work with smart risk‑takers, courageous collaborators, and curious minds. As part of the Rithum team, you are valued, supported, and included. Guided by a transparent culture and accessible, approachable leadership, we offer career opportunities aligned to your ambitions and talents. To ensure work and life balance works for you, we also offer an array of resources to support you and your families, including comprehensive benefits and wellness plans.

• Partner with the leading brands and retailers.
• Connect with passionate professionals who will help support your goals.
• Participate in an inclusive, welcoming work atmosphere.
• Achieve work‑life balance through remote‑first working conditions, generous time off, and wellness days.
• Receive industry‑competitive compensation and total rewards benefits.
• Enhanced Private Medical Insurance and a Health Cash Back Plan.
• Life insurance & disability benefits.
• Pension plan with 4% Company match.
• Competitive time off package with 25 Days of PTO, 8 Company‑paid Holidays, 2 paid floating holidays (new in 2026!), 10 paid sick days, 2 Wellness days and 1 Paid Volunteer Day.
• £45/month Remote work stipend for internet.
• Access to tools to support your wellbeing such as the Calm App and an Employee Assistance Program.
• Professional development stipend and learning and development offerings to help you build the skills and connections you need to move forward in your career.
• Charitable contribution match per team member.

Rithum is an equal opportunity employer. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates without regard to race, religion, color, sex, gender identity, sexual orientation, age, non‑disqualifying physical or mental disability, national origin, veteran status or any other protected characteristic. All employment is decided on the basis of qualifications, merit, and business need.

We're committed to providing reasonable accommodations in accordance with the law for qualified applicants. If you require assistance during the interview process due to a medical condition or need support accessing our website or completing the application process, please reach out to us by completing the Accommodations Request Form. Your comfort and accessibility are important to us, and we're here to ensure a seamless experience as you explore opportunities with our team.