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Product Builder (UI/UX Designer & Mobile App Developer) - (m/w/d)
Luma Life 🇩🇪 Germany
You will develop and maintain mobile applications for iOS and Android, taking features from initial concept to final release. You will also design UI/UX, conduct testing, and collaborate directly with founders to translate user feedback into product improvements.
Responsibilities
- Develop and enhance the mobile app for iOS & Android from idea to release
- Understand user problems and translate them into concrete product solutions
- Create UI/UX designs, build prototypes, and iterate rapidly
- Collaborate with founders on product decisions and turn ideas into functional features
- Utilize Claude Code, Figma AI, and other AI tools to accelerate development
- Analyze user feedback and incorporate it into product improvements
- Perform testing and QA to ensure high product quality
- Identify and fix bugs and UX issues independently
- Continuously improve technical architecture and development processes
- Explore and integrate new technologies into Luma Life
Requirements
- Experience in mobile app or frontend development, preferably iOS/Android
- Strong understanding of modern iOS and Android development practices
- Ability to build features end‑to‑end from concept to release
- Excellent UI/UX and product design sense
- Proficiency with Figma, preferably Figma AI
- Intensive experience with Claude Code or similar AI‑coding tools
- Product mindset: think in users, problems, and solutions
- High ownership, learning willingness, and self‑direction
- Solid testing and QA skills
- Quick adaptation to new technologies and problem spaces
- Excellent German language skills (written and spoken)
Benefits
- Direct collaboration with founders and very short decision‑making cycles
- Large design and development autonomy
- Full ownership of features from concept to release
- AI‑first workflow using Claude Code, Figma AI and other modern tools
- Immediate impact: work used by real users daily
- Startup environment with minimal bureaucracy
- Mission‑driven product supporting people with dementia and their families
- Share options based on performance and long‑term commitment
- Early‑stage building opportunity to shape product, team, and culture
Key Skills
About Luma Life
At Luma Life, our mission is to help people with dementia live longer in independence while easing the burden on families and caregivers. We are developing Luma, a voice-based AI assistant that provides daily structure, answers questions, supports routines and offers cognitive stimulation. Through intuitive voice interaction and an adaptive, dementia-specific design, Luma fosters independence, emotional stability and meaningful connection. A secure caregiver platform enables insights, personalization and timely support.
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