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

October 14, 2026

Hybrid

Middle

Berlin

Indeed

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Mandatory office attendance
3 days per week

Description

A young startup working partly in Berlin and partly remotely is building an app that aims to bring appreciation, sustainability and health into the workplace. They are looking for someone who combines native mobile development for iOS and Android with a strong feel for UI/UX and product development. The role goes beyond implementing requirements: from the first idea through UX concept and design to technical implementation, you actively shape how the product evolves. AI tools are expected to be part of the everyday workflow.

Gender markers in the title: (m/w/d)

In accordance with European anti-discrimination legislation, this job is open to all candidates

Mmale

Wfemale

Ddiverse

Responsibilities

Drive the further development and expansion of our app with modern technologies for iOS and/or Android
Develop native apps with Swift/SwiftUI and Kotlin/Jetpack Compose
Design and technically implement user-centric, individual and innovative features on both platforms
Write clean, maintainable and well-tested code and continuously evolve our technical architecture
Work with REST APIs and support the technical integration of new product features
Try out new technologies together as a team and find sensible solutions to complex challenges
Actively further develop the app's user experience, always thinking from the users' perspective
Conceptualize and design flows, screens and interactions
Question existing features and identify potential for improvement
Translate ideas and requirements together with the team into concrete product solutions
Develop prototypes and UI concepts and implement them yourself in the app
Shape a consistent and intuitive user experience across iOS and Android
Consider not only how something is implemented but also why we build it at all
Bring in your own ideas and genuinely influence how the product develops
Work closely with the founders, development and other team members
Question existing solutions and develop new ones together with the team
Carry your own product ideas from first thought through to a finished feature
Help determine what users really need and turn that into good digital products

Requirements

Passion for developing native iOS apps in Swift and Android apps in Kotlin
Relevant experience with SwiftUI and Jetpack Compose
A good feel for UI, UX and intuitive user guidance
Ideally experience with UI/UX design, prototyping or design tools such as Figma
Agile development, Clean Code, MVVM and Dependency Injection are familiar terms
Good knowledge of automated testing (UI and unit tests) and quality assurance
Experience working with REST APIs as part of your technical toolkit
Interest not only in technology but also in building good products
Desire to contribute own ideas, take responsibility and help shape decisions
Routinely use AI tools in daily work such as developing, refactoring, debugging, testing and prototyping
Able to write, understand, debug and critically review code independently of AI
Understanding what AI-generated code does and why it works, not just how to prompt it
Enjoy solving complex problems and turning them into simple, intuitive solutions

Conditions

Real creative scope: you actively shape the product and its future, not just features
A balanced role split 50% development and 50% UI/UX and product design
Top equipment with a MacBook Pro and two monitors or similar to your taste
Personal development and a steep learning curve in a startup environment
Flexible hybrid model with 2–3 days per week together in the Berlin office
Flexible hybrid work possible after successful onboarding
Workation possible: 1–2 months working from abroad after onboarding
A team where your ideas are heard and implemented
Immediate visible influence on the product and its customers
Formal education or degree background is not important, skills and thinking matter most