16.07.2026 aktualisiert


Premiumkunde
100 % verfügbarTech Lead & Software Architect
Stuttgart, Deutschland
Deutschland
Master of Science (Informatics)Über mich
Freelance Tech Lead & Software Architect with focus on scalable mobile, web & cloud systems. Experienced in end-to-end architecture, technical leadership and product-driven development across e-commerce, automotive and healthcare.
Skills
Product OwnerSAFeAndroidSoftware ArchitectureProduct OwnershipTest-Driven DevelopmentSwift (Programmiersprache)BackendDartDomain Driven Design
Core Competencies
Software Architecture, System Design, Technical Leadership, Product Ownership
Languages
Swift, Kotlin, TypeScript, Dart, C#
Frontend & Mobile
iOS, Android, React, Angular
Backend & Cloud
Node.js, AWS, Microservices, Apache Kafka
Architecture & Practices
Clean Architecture, Domain-Driven Design, Microservices, Micro Frontends
Testing & Quality
Test-Driven Development, Unit Testing, Integration Testing, UI Testing
Tools & Delivery
CI/CD, Git, Fastlane, Docker, Kubernetes
Ways of Working
Agile (Scrum, Kanban, SAFe), Pair Programming, Mentoring
Sprachen
DeutschMutterspracheEnglischverhandlungssicherSpanischGrundkenntnisse
Projekthistorie
Mercedes-Benz develops infotainment systems that enable the integration and execution of Android-based applications within vehicles. The platform provides core functionalities such as notifications, consent management, and system integrations, and interacts with both onboard and offboard systems.
Jonas supported the client as a Function Owner within this platform. He was responsible for multiple platform functions and guided their development across the full product lifecycle, working closely with architects, product owners, and stakeholders to define technically sound and user-centric solutions.
He led international development teams in India and, following a team consolidation, took responsibility for two teams. His role included backlog prioritization, requirement alignment, and roadmap evolution, ensuring alignment with the overall platform strategy.
On the technical side, he contributed to defining interfaces between Android and other system components (e.g. Rich OS). Acting as a bridge between product and engineering, he translated complex topics into actionable insights.
He also supported the strategic evolution of the platform by aligning user needs, technical dependencies, and business goals.
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Android Platform, Automotive, Infotainment, Agile (Scrum, SAFe), Stakeholder Management, Roadmapping, System Integration, API Design, Technical Leadership
Travee is a startup building an AI-driven travel assistant aimed at improving travel planning
and user experience through intelligent automation and personalized recommendations.
Jonas initially supported the team in shaping the conceptual foundation of key product
features. He developed end-to-end solution concepts, covering data modeling, backend
logic, and integration into mobile applications.
He later played a key role in setting up the iOS application, defining the initial architecture(e.g. Clean Architecture, routing) and structuring the codebase to enable efficient AI-assisted
development. This included preparing the project in a way that allowed AI tools to be
effectively integrated into the development workflow.
In addition, Jonas contributed to the integration of Kotlin Multiplatform, enabling shared
business logic between iOS and Android applications and ensuring a consistent technical
foundation across platforms.
Through his work, Jonas helped establish a stable technical foundation for the product and
enabled the use of modern, AI-supported development approaches in a startup environment.
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Swift, Kotlin, Kotlin Multiplatform (KMM), iOS, Mobile Development, Clean
Architecture, System Design, AI-assisted Development, LLM Integration, Product
Development, Startup, Cross-platform, API Design, Backend Integration, Architecture
Design
Jonas supported the client as Lead Full-Stack Developer with a focus on iOS development within the OTTO mobile application used by several million users. Based on his prior experience, he quickly contributed across Android, web, and infrastructure topics.
In addition to feature development, he improved disaster recovery mechanisms, introduced declarative UI frameworks, and further automated release processes, resulting in a more stable product and faster delivery. He also supported other teams in optimizing their touchpoints and actively shared knowledge on Clean Code, Clean Architecture, and Test Driven Development through pair and mob programming sessions.
Jonas also acted as Technical Project Lead for key epics such as Flashdeals. His responsibilities included stakeholder communication, roadmap planning, backlog management, and continuous risk analysis. In this role, he ensured successful delivery of the netID epic and enabled improved personalization within the iOS and Android applications.
Beyond development, he contributed to interviews, onboarding, and mentoring, helping to strengthen team collaboration and delivery capabilities.
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Swift, Kotlin, Clean Architecture, TDD, CI/CD (CircleCI, Fastlane), iOS, Android, AWS, Agile (Scrum, Kanban), Product Ownership, API Design