UI/UX Designer (Service Design) – Mobile App & Backoffice

Intro

We are looking for a hands‑on UI/UX Designer (mid–senior level) to take end‑to‑end ownership of the UI/UX redesign of our mobile app (iOS & Android) and the UX redesign of the backoffice .

You will be the main design owner for the app experience and a key contributor to the backoffice UX , working closely with the Head of Service Design and a dedicated developer to translate user needs, business goals, and technical constraints into high‑quality, coherent product experiences.

This role sits within the Service Design team and combines strong execution , user‑centered thinking , and close collaboration across design, development, and stakeholders .

Your mission

• Lead and execute the UI/UX redesign of the mobile app (iOS & Android)
• Contribute to the UX redesign of the backoffice , ensuring usability, clarity, and efficiency
• Ensure consistent, scalable, and user‑centric experiences across customer‑facing and internal tools
• Anchor design decisions in user research, testing, and service design principles

What You'll Bring

Experience & Skills

• Mid‑level to senior experience as a UI/UX Designer, Product Designer, or similar role
• Strong hands‑on experience designing mobile apps for iOS and Android
• Experience contributing to or redesigning backoffice / internal tools
• Proven ability to own and drive a product area independently
• Strong proficiency in Figma (components, libraries, collaboration)
• Experience with prototyping tools for validation and developer handoff
• Familiarity with design systems and scalable UI patterns
• Experience planning and conducting user research and usability testing
• Working knowledge of Adobe Creative Suite , especially:
  • Photoshop
  • InDesign
• Strong collaboration skills with developers and non‑design stakeholders

Mindset

• User‑centered and evidence‑driven
• Comfortable balancing autonomy with collaboration
• Pragmatic: able to move from discovery to delivery
• Clear communicator who can explain design rationale
• Comfortable in start up environment

What You'll Get

• A collaborative environment where teamwork is at the heart of how we work
• A truly international and diverse team
• A modern workspace in Berlin Mitte within a collaborative coworking environment, with flexible hybrid and and 20 days per year of remote work
• 30 days of annual leave
• A 50€ monthly mobility budget or Deutschland Ticket
• A personal learning & development budget to support your growth
• Regular team get-togethers and informal company events
• The opportunity to experience the products we build
• The chance to grow with a young and evolving company

What You'll Do

UI/UX Design & Execution (App & Backoffice)

• Own the end‑to‑end UI/UX design of the mobile app (iOS & Android)
• Contribute to and support the UX redesign of the backoffice , focusing on workflows, usability, and efficiency
• Translate user needs, insights, and requirements into user flows, wireframes, and high‑fidelity designs
• Create and maintain interactive prototypes to validate concepts and support development
• Ensure usability, accessibility, and visual consistency across all touchpoints

Design System

• Contribute to and help maintain the design system , ensuring consistency across the app and backoffice
• Define and document reusable components, patterns, and interaction guidelines
• Work closely with development to ensure correct and efficient implementation of the design system

User Research

• Plan and execute user research activities (e.g. interviews, usability tests, validation sessions)
• Support and collaborate on research initiatives led by others (service design, product, or external partners)
• Synthesize insights into clear findings and actionable design improvements

Testing & Validation

• Define UX‑focused test plans in collaboration with development and QA
• Support test execution by reviewing results, identifying issues, and iterating on designs
• Ensure design quality through pre‑release checks and ongoing improvements

Collaboration & Communication

• Work closely with:
  • Head of Service Design (direction, priorities, quality)
  • Developer (handoff, feasibility, implementation, iteration)
• Prepare and deliver occasional stakeholder presentations to explain design decisions and outcomes
• Provide light mentoring and design guidance to create a design culture