Mobile Developer (all genders)

About the job

Experienced Mobile Developer who will take ownership of complex features and serve as technical authority. Works with Product Owners to translate business requirements into scalable, secure mobile solutions.

You

Key Responsibilities
Feature Ownership & Delivery

• Take ownership of complex features from design through production
• Work with Product Owner to refine requirements
• Estimate and execute deliverables reliably
• Identify technical risks early and propose mitigation
• Ensure features meet security, performance, and scalability requirements
• Manage app store release processes

Continuous Improvement

• Identify opportunities for technical optimization and refactoring
• Evaluate new tools, frameworks, and approaches
• Propose improvements to development processes
• Stay current with iOS and Android platform updates

Required Qualifications
Experience

• Minimum 3+ years of professional software development
• Minimum 3+ years with React Native + Native iOS/Android development
• Proven experience designing scalable mobile systems
• Strong track record shipping production apps reliably
• Experience mentoring or leading other developers
• Familiarity with app store deployment processes

Technical Expertise – Mobile Stack

• Expert-level React Native with deep understanding of native bridge and platform-specific considerations
• Strong iOS development: Swift, native APIs, performance optimization, App Store deployment
• Strong Android development: Kotlin/Java, native APIs, performance optimization, Google Play deployment
• State management expertise (MobX or Redux patterns)
• Mobile-specific skills: offline-first design, performance optimization, memory management, battery efficiency
• Firebase proficiency: authentication, real-time databases, cloud functions, analytics
• HTTP/REST clients (Axios), local data persistence (Realm)
• Understanding of app store processes and mobile-specific security
• Native iOS/Android build processes and CI/CD for mobile

Cross-Stack Competencies

• Expert REST API design and best practices
• Strong security knowledge: authentication, authorization, encryption, mobile security threats
• Cloud-native architecture patterns: microservices, distributed systems, resilience
• CI/CD pipelines for mobile, automated testing strategies (unit, integration, E2E)
• Basic understanding of AI/ML concepts (ideal)

Bonus: Polyglot Capabilities

• Experience with Python, PHP, Node.js, Java, or other backends
• Ability to understand backend architecture implications

Soft Skills

• Excellent communication in English and German
• Ability to articulate complex technical concepts clearly
• Strong problem-solving and analytical thinking
• Mentoring and coaching capabilities
• Proactive, self-directed, takes ownership
• Comfortable with ambiguity and rapid change