Responsibilities include creating wireframes, simple mockups, and assisting with interface assets for iOS and Android apps. Juniors work mainly in tools like Figma, Sketch, or Adobe XD, following established design systems and ensuring consistency with brand guidelines. They support usability testing sessions by preparing prototypes, gathering user feedback, and documenting insights. At this stage, the focus is on learning platform-specific guidelines (Human Interface Guidelines, Material Design), refining attention to detail, and understanding the basics of user-centered design.

Semi-senior designers handle end-to-end feature design, from research to prototype. They lead user flows, create interactive prototypes, and perform usability tests with real users. Responsibilities include collaborating closely with developers to ensure design feasibility, refining design systems, and optimizing interfaces for accessibility and performance. Mastery of advanced prototyping tools (Figma interactive components, InVision, Principle) and analytics platforms (Hotjar, Mixpanel, Google Analytics for mobile) becomes essential. At this level, semi-senior designers actively contribute ideas to improve mobile usability and mentor juniors on visual consistency.

Senior designers shape the overall product experience across mobile platforms. They define design strategies, establish advanced design systems, and ensure cohesive experiences across multiple apps or features. Responsibilities include conducting complex user research, applying behavioral insights, and balancing user needs with business goals. Senior designers mentor team members, lead workshops with stakeholders, and guide developers on translating prototypes into production-ready apps. Expertise often includes motion design for micro-interactions, advanced accessibility practices, and evaluation of emerging design frameworks or tools.

User experience strategy becomes central at the managerial level. The Mobile UX/UI Design Manager oversees design teams, sets long-term design vision, and ensures alignment with company objectives. This role involves coordinating with product managers and engineers, managing resources, and presenting design impact to executives. Managers also drive adoption of design operations (DesignOps), select and implement collaborative platforms, and establish standards for accessibility and inclusion. By leading cross-functional initiatives and championing the voice of the user, they guarantee that mobile experiences remain competitive, scalable, and innovative.