Mobile Developer & UI/UX Product Designer (m/w/d)

You will be responsible for the end-to-end development of native mobile applications, including technical implementation and UI/UX design. Additionally, you will actively contribute to product strategy and feature conceptualization within a collaborative startup environment.

Responsibilities

• Develop and extend the Value‑App for iOS and/or Android using modern native technologies
• Design and implement user‑centered features, creating flows, screens and interactions
• Write clean, maintainable, well‑tested code and evolve the technical architecture
• Integrate REST APIs and support new product functionality
• Create prototypes and UI concepts in Figma and implement them in the app
• Collaborate with founders, developers and other team members on product direction
• Apply AI tools in development, debugging, testing and prototyping
• Contribute ideas from concept through to shipped product

Requirements

• Strong experience developing native iOS apps with Swift/SwiftUI
• Strong experience developing native Android apps with Kotlin/Jetpack Compose
• Good sense for UI/UX and intuitive user flows
• Experience with Figma or similar design tools
• Knowledge of agile development, Clean Code, MVVM and Dependency Injection
• Experience with automated testing (UI and unit tests)
• Familiarity with REST APIs

Benefits

• 50 % development, 50 % UI/UX & product focus
• Top‑of‑the‑line MacBook Pro with dual monitors
• Flexible hybrid work model (2‑3 days in Berlin office, remote otherwise)
• Workation possibilities (1‑2 months abroad after onboarding)
• Opportunity to influence product direction and see impact directly

Key Skills