A market-leading, tech-driven online retail business is looking for a commercially focused Merchandise Planner (Assistant Merchandiser or Junior Merchandiser level) to take ownership of stock optimisation across a defined product area. This role is responsible for stock holding, availability and warehouse space utilisation, working closely with Buying to maximise sales, margin and overall performance. You’ll own the OTB process, manage forecasts, drive KPI reporting, lead supplier reviews, and proactively manage in-season performance and clearance activity. We’re looking for someone with: Experience as an Assistant or Junior Merchandiser Strong numerical and analytical skills Commercial awareness and confidence interpreting performance data Ability to manage multiple stakeholders in a fast-paced environment Strong Excel This is a great opportunity to join a fast-growing, data-led retail environment where pace, collaboration and customer focus are key.