AppBaumeister Collective
Independent Senior Experts for iOS, Android & Web App Development
Our Members
Tobias Boehm
Senior Android Developer
Björn Kechel
Senior Android Developer
Tobias Weber
Senior Fullstack Developer
Our Members
Click any specialist for more information
Tobias Boehm
Senior Android Developer
Björn Kechel
Senior Android Developer
Tobias Weber
Senior Fullstack Developer
Services
Professional App Development - We Develop Apps for Your Success
App Maintenance & Updates
Keep your existing app current and functional. We handle App Store compliance, bug fixes, performance optimizations, and regular updates for Android and iOS apps.
What you get:
Your benefits:
Our process:
Free Consultation
Get an assessment for your app project within 24h
24 Hours
Response guaranteed
Free
No-obligation consultation
Instant Assessment
Direct feedback on your project
Network of Independent Specialists
Meet our independent specialists. Each expert works autonomously and directly with you.
Tobias Boehm
Senior Android Developer
Lead Android developer with 10+ years experience building scalable mobile applications for diverse industries.
Björn Kechel
Senior Android Developer
Senior Android Developer with 14+ years experience in native Android development, Kotlin Multiplatform and gaming.
Tobias Weber
Senior Fullstack Developer
Senior Fullstack Developer with 6+ years of experience developing cloud-native microservices architectures and modern web applications for banking, e-commerce, and industrial solutions.
Ready to Work with One of Our Independent Experts?
Contact us for a free consultation. We'll connect you with the right independent freelancer for your project.
What Unites Us as a Team
Shared principles that shape our work and strengthen us as a team
Clean Architecture First
Testable, modular code architecture with 95%+ test coverage and automated quality controls (ktlint, detekt, SonarQube).
Cutting-Edge Tech Stack
Apple Vision Pro apps, AI integration (OpenAI GPT), Kotlin Multiplatform, and cloud-native solutions in production enterprise applications.
Enterprise-Grade Experience
Proven expertise in mission-critical systems: Healthcare, Telecom, Streaming platforms serving millions of users.
Direct Collaboration
Independent experts work directly with you - no agency overhead, no middlemen, transparent fixed prices from day one.
Discover Our Experts in Detail
Learn more about the skills, projects, and experience of our independent specialists.
View Team ProfilesPortfolio
Successful individual projects by our independent members
Allianz Health App
An accessible health app for Allianz, backed by an automated CI/CD pipeline.
Watch App for Workplace Safety
An Apple Watch as a safety device on site, connected to the IoT environment via Bluetooth.
White-Label App
One app base, 30 health insurers: the Bitmarck White-Label app, with NFC and encrypted data storage.
AR Apps for Apple Vision Pro
Augmented reality apps for the Apple Vision Pro, built with RealityKit and ARKit.
Museum Guide App
White-Label app for museums, built with Flutter. Visitors scan the QR code at an exhibit and hear the matching audio guide.
Electronic Patient Record (ePA)
Maintenance and further development of the electronic patient record, versions 3.0 and 3.0.5, for the German healthcare system.
Tracemate Android App
Architectural and structural overhaul in line with Clean Code and Clean Architecture principles.
congstar Main App
Modularization of the main app and introduction of code quality controls.
Mind Extension: AI Content App
Design and development of the Android app and the backend for AI-driven content generation.
RTL+ Music
Contributed to the RTL+ Music streaming app with responsibility for the podcast section.
Immowelt Search
Further development of Immowelt search and a prototype for polygon drawing on Google Maps.
AOK Bonus-App
Redesign of the health app with a new single-activity navigation concept.
komoot Android App
New features and ongoing maintenance for the komoot app.
Logistics Management App
Apps for logistics and transport management. Every shipment stays traceable in real time, even when the connection drops.
Brand App with Shop
The Montblanc brand app: brand experience and shop in one, including payment processing.
Member Details
Learn more about our independent specialists and their expertise
Tobias Boehm
Senior Android Developer
As a Senior Android Developer with over 10 years of experience, I bring a passion for clean code and future-proof solutions. From my beginnings as co-founder of RETROTEAM UG to my current work with IBM's electronic health record, I have helped teams build modern, intelligent, and fast mobile apps.
My expertise spans the complete app development process - from concept and design to deployment. I specialize particularly in Clean Architecture, Kotlin/Jetpack Compose, and the integration of generative AI into mobile applications.
Freelance Senior Android Developer
Maintenance and further development of the electronic health record (ePA) v3.0 and v3.0.5.
Freelance Senior Android Developer
Architectural and structural redesign of the Tracemate Android App.
Freelance Senior Android Developer
Modularization of the main app and introduction of code quality controls.
Mobile & Backend Developer
Full-stack development of an AI content generation app "Mind Extension".
Senior Android Developer (Contract)
Media streaming solution RTL+ Music/MPA. Responsible for the podcast area.
Contact
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