With nearly 15 years of experience crafting Atlassian Apps, K15t has honed a winning strategy that revolves around user-centric design principles and the effective use of personas. Join us as we share our approach to building successful apps that users adore. We’ll showcase our four essential design principles, illustrated with real-world examples and insights drawn from our journey. Additionally, discover how our persona-driven framework enhances every aspect of our product lifecycle, from marketing and design to development and support. Whether you've been building and selling marketplace apps for a long time or whether you are new to the game, this talk will equip you with actionable strategies to elevate your app development process and customer satisfaction.