Borja leads Stoker's visual direction work across film, television, and streaming—defining how a project should look before it becomes a campaign. His work begins before the poster: he shapes the concept, tone, and positioning that production companies and platforms use to sell a project, and which then guides everything from the pitch deck to the final key art.

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Since founding Stoker in 2013, he has directed the visual identity of projects for Atresmedia, Bambú Producciones, WPP, and other leading production companies and agencies—a body of work encompassing sales materials, campaign management, and key art for theatrical and streaming releases. His poster for Waldo (Dada Films) was a finalist for the 2024 Cruz Novillo Award from Cinemanía for best Spanish film poster.