To thrive as a Junior UI Developer, you need a solid understanding of HTML, CSS, and JavaScript, along with a relevant degree or coding bootcamp experience. Familiarity with UI frameworks like React or Angular, as well as prototyping tools such as Figma or Sketch, is often expected. Attention to detail, a willingness to learn, and effective communication are standout soft skills in this role. These abilities are crucial to building visually appealing, user-friendly interfaces and collaborating efficiently within a development team.