Join Luzern eCommerce: Powering the World’s Most Ambitious BrandsSince 2003, Luzern eCommerce has been helping leading global brands grow their online business. We partner with brands including Panasonic, Reebok, Stokke, KIKO, Next, Twining's, Canon, Bondi Sands and Philips, helping them accelerate growth and deliver exceptional customer experiences across major marketplaces including Amazon and Zalando, branded webstores and social platforms.Backed by significant investment, Luzern is an international, technology-led eCommerce business with an ambitious growth strategy. Our AI-enabled Channel Optimizer platform, combined with our eCommerce expertise, helps brands manage and grow their presence across increasingly complex digital channels.As we continue to grow and evolve, we are looking for talented people who enjoy working in a fast-paced, collaborative environment and want to play an active role in the next stage of Luzern's development.We are looking for an experienced Senior Marketplace professional with deep Amazon Vendor and Seller expertise, a strong drive for results and a passion for building great teams and client partnerships.As a Senior Marketplace Manager, you will own the strategy and commercial performance of some of our most important brands on Amazon, while leading and developing a team of Marketplace Managers. You will bridge the gap between commercial strategy and day-to-day execution, and help our clients grow beyond Amazon into the wider marketplace landscape.What You'll Be DoingClient & Commercial Leadership· You will be the senior point of contact for a portfolio of high-value brands across Amazon Vendor (1P) and Seller (3P), building trusted relationships with key stakeholders and executive sponsors.· You will own commercial performance across your accounts – sales, profitability and advertising efficiency – proactively identifying risks and opportunities and reporting on anything that may impact performance.· You wil