Senior Project Manager Size & Fit (all genders)

BESTSECRET is the leading European online destination for premium and luxury off-price fashion. The Group offers its members in 28 countries across Europe a superior brand portfolio complemented by a high-end shopping experience. At the same time, BESTSECRET enables its brand partners to clear overstock at scale with minimum visibility and maximum brand equity protection. The unique business model is based on its closed character with an invitation-only customer membership, longstanding brand partner and customer relationships, combined with a tech-focused mindset. BESTSECRET has a strong track record of profitable growth over many years. It generated revenues of EUR 1,533.7 million in 2025 and employs around 2,200 people from over 90 nations. The Group draws on a heritage of 100 years in the textile and fashion industry and today is owned by Permira Funds and the founding families Schustermann and Borenstein.

Your Mission

Help our members find the right size the first time. As Project Manager Size & Fit in our Content Management team, you will drive the projects that make size and fit information on BESTSECRET more accurate, more complete and more useful – across thousands of brands with very different sizing standards. Your clear goal: reduce size- and fit-related returns, improve customer experience and strengthen our profitability and sustainability.

Your Responsibilities

• Plan, coordinate and deliver Size & Fit projects from kick-off to roll-out – timelines, milestones, stakeholders and reporting.
• Analyse return behaviour and brand-level sizing data together with our Data & Analytics team to identify the biggest levers for return reduction.
• Improve the quality and coverage of fit notes, measurements, size charts, and model data on the product detail page, working closely with Content, Buying and brand partners.
• Steer the on-site implementation of Size & Fit projects with our current content service providers – e.g. determining product size tendency, rolling out processes, and ensuring continuous checks, validation and maintenance.
• Define and track KPIs such as size-related return rate, size-advice adoption and conversion, and prepare regular updates for management.
• Run test-and-learn initiatives (A/B tests, pilots on selected categories or brands) and translate the results into scalable standards and processes.
• Act as the interface between Content Management, Buying, Tech, Customer Service and Logistics on all Size & Fit topics.
• Document processes, guidelines and content standards and train internal & external teams on them.

Your Profile

• Degree in Business Administration, Fashion Management, E-Commerce, Textile/Clothing Technology or a comparable qualification.
• 3+ years of professional experience in project management, e-commerce, content or returns management – ideally in fashion or online retail.
• Real interest in fashion, fit and sizing; experience with size charts, grading or fit processes is a plus.
• Strong analytical skills and confidence working with data (Excel/Google Sheets; SQL, Power BI are an advantage).
• Structured, hands-on way of working with a high level of ownership and the ability to manage several workstreams in parallel.
• Strong communication and stakeholder management skills across business and tech teams.
• Willingness to travel within Europe to our content service providers' sites as required for on-site project implementation.
• Fluent in English; German is a plus.

What Makes You Successful

• Customer-centric mindset – you think from the member's fitting-room moment backwards.
• Pragmatic and solution-oriented, with an eye for detail where it matters.
• Comfortable with ambiguity and with building something new.
• Team player who enjoys working across departments.

What We Offer

• A high-visibility role with a direct, measurable impact on one of BESTSECRET's most important commercial and sustainability levers: the return rate.
• Ownership of the Size & Fit topic end-to-end – from data and content to customer-facing features – across a brand portfolio of several thousand premium and luxury brands.
• Close collaboration with Buying, Tech, Data and Customer Service in an international environment with colleagues from over 90 nations.
• Hybrid working model, modern office in Munich & Berlin and attractive employee discounts on our premium and luxury assortment.
• Long-term development opportunities within a growing Content Management & Convenience organization.

At BESTSECRET, diversity isn’t just a trend – it’s our professional philosophy. We are dedicated to cultivating an inclusive workplace where everyone’s unique talents and backgrounds are celebrated. Applicants from all backgrounds, experiences and perspectives are welcome to join us in our mission towards a more vibrant and inclusive future.