User Interface Designer – Mobile App

Role Overview

This is a freelance contract opportunity for a UI designer to help improve the look and usability of a mobile application for a technology client. The work is fully remote and may continue beyond the initial project depending on business needs and how well the collaboration goes.

The assignment calls for someone with a strong mobile app design portfolio, a sharp eye for detail, and a genuine interest in building smooth, user-friendly digital experiences.

Responsibilities

• Create and polish mobile app user interfaces so that the experience remains clear, consistent, and easy to use across every screen.
• Work with stakeholders to understand goals and translate them into practical design outcomes.
• Produce wireframes, interactive prototypes, and high-fidelity mockups to present design direction.
• Use strong digital design, accessibility, and UX practices in all outputs.
• Refine designs using feedback and findings from usability testing.
• Deliver work on time while maintaining the expected quality level.
• Keep up to date with current mobile UI/UX trends and improvements.

Skills & Requirements

• Hands-on experience designing interfaces for mobile apps on iOS and/or Android.
• Practical knowledge of design software such as Figma, Sketch, or Adobe XD.
• Solid grasp of user-centered design and mobile usability standards.
• Ability to build wireframes, prototypes, and detailed visual layouts.
• Strong verbal and written communication, plus a collaborative working style.
• Careful attention to detail and the ability to juggle several tasks at once.
• Comfortable working remotely and completing assignments independently.
• A portfolio that demonstrates relevant mobile interface design work.

About the Client

Twine operates as a freelance marketplace that connects skilled freelancers, consultants, and contractors with organizations seeking creative and technical talent. Its network includes both major global enterprises and fast-growing startups.

Mission

The platform’s goal is to help creators and businesses succeed in a freelance-first environment shaped by AI.