AppBaumeister Collective
Independent Senior Experts for iOS, Android & Web App Development
- 128+Years Experience
- 183+Projects Completed
- 75+Companies Worked With
Our Members
Tobias Boehm
Senior Android Developer
Our Members
Click any specialist for more information
Tobias Boehm
Senior Android Developer
Our Offer
Services
Professional App Development - We Develop Apps for Your Success
App Maintenance & Updates
From €1,799/month
Ongoing
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:
- App Store Compliance Updates
- Bug Fixes & Performance Optimization
- Security Updates & Patches
Your benefits:
- Zero downtime
- Store compliance ensured
- Long-term app health
Our process:
- 1Analysis & ConsultationFree initial consultation and project analysis
- 2DevelopmentAgile development with regular updates
- 3DeliveryTesting, deployment and follow-up support
Get Started
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.
- Senior Specialists
- 10
- Project Successes
- 183+
- Years Experience
- 128+
- Companies Worked With
- 75+
Senior Android Developer
- Years Experience
- 10+
- Projects
- 8+
Lead Android developer with 10+ years experience building scalable mobile applications for diverse industries.
- Android Development
- Kotlin
- Google Cloud
Senior iOS & Flutter Developer
Senior Full-Stack Developer
Lead iOS Developer
Senior Android Developer
- Years Experience
- 14+
- Projects
- 15+
Senior Android Developer with 14+ years experience in native Android development, Kotlin Multiplatform and gaming.
- Android Development
- Kotlin Multiplatform
- Jetpack Compose
Tech Lead & Backend Architect
Senior Digital Art Director
Senior Fullstack Developer
- Years Experience
- 6+
- Projects
- 20+
Senior Fullstack Developer with 6+ years of experience developing cloud-native microservices architectures and modern web applications for banking, e-commerce, and industrial solutions.
- Spring Boot
- Kotlin
- React
Mobile Developer Android & iOS
Senior iOS & Swift Developer
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.
Our Work
Portfolio
Successful individual projects by our independent members
Trusted by leading companies worldwide
Allianz
12.2024 - present
Allianz Health App
Current
An accessible health app for Allianz, backed by an automated CI/CD pipeline.
- Accessibility
- CI/CD Pipeline
- Automated Testing
- iOS
- Jenkins
- A11Y
- SonarQube
- Fastlane
- Quick
- +1 more
Calima Safety
09.2024 - 03.2025
Watch App for Workplace Safety
Current
An Apple Watch as a safety device on site, connected to the IoT environment via Bluetooth.
- Apple Watch
- Bluetooth and IoT
- Workplace Safety
- iOS
- WatchOS
- WatchKit
- Bluetooth
- IoT
- Sentry
Bitmarck
09.2024 - 12.2024
White-Label App
One app base, 30 health insurers: the Bitmarck White-Label app, with NFC and encrypted data storage.
- White-Label for 30 Insurers
- NFC and Encryption
- Healthcare
- iOS
- Jenkins
- AppCenter
- Firebase
- NFC
- CryptoKit
- +1 more
ShapedAgency / Unit9
04.2024 - 10.2024
AR Apps for Apple Vision Pro
Augmented reality apps for the Apple Vision Pro, built with RealityKit and ARKit.
- Apple Vision Pro
- RealityKit and ARKit
- SwiftUI
- VisionOS
- Apple Vision Pro
- RealityKit
- SwiftUI
- ARKit
MicroMovieMedia
07.2024 - 09.2024
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.
- Cross-Platform with Flutter
- QR Code Scanner
- Audio Streaming
- Flutter
- Dart
- GoRouter
- QR Code Scanning
- Audio Streaming
IBM
10.2024 - present
Electronic Patient Record (ePA)
Current
Maintenance and further development of the electronic patient record, versions 3.0 and 3.0.5, for the German healthcare system.
- Security-Critical Application
- Regulated Industry
- Kotlin Multiplatform
- Android
- Kotlin
- Compose
- Coroutines
- KMP
- MVI
- +1 more
blueworld GmbH
01.2024 - 09.2024
Tracemate Android App
Architectural and structural overhaul in line with Clean Code and Clean Architecture principles.
- Code Refactoring
- Process Improvement
- Team Mentoring
- Clean Architecture
- Kotlin
- Coroutines
- RXJava
- MVI
- Dagger2/Hilt
congstar
09.2023 - 01.2024
congstar Main App
Modularization of the main app and introduction of code quality controls.
- Modular Architecture
- Static Code Analysis
- Jetpack Compose
- Kotlin
- Jetpack Compose
- Clean Architecture
- ktlint
- detekt
- MVI
MNDXT
05.2023 - present
Mind Extension: AI Content App
Current
Design and development of the Android app and the backend for AI-driven content generation.
- Full-Stack Development
- AI Integration
- Cloud Infrastructure
- Android
- Kotlin
- Compose
- Ktor
- Google Cloud
- OpenAI GPT
- +1 more
RTL Group
02.2022 - 08.2023
RTL+ Music
Contributed to the RTL+ Music streaming app with responsibility for the podcast section.
- Audio Streaming
- SAFe Framework
- GraphQL Integration
- Kotlin
- Dagger/Hilt
- GraphQL
- Coroutines
- MVVM
- Jetpack Compose
Immowelt GmbH
02.2021 - 01.2022
Immowelt Search
Further development of Immowelt search and a prototype for polygon drawing on Google Maps.
- Map Search
- Geodata
- Real Estate Market
- Kotlin
- KOIN
- Google Maps
- JTS Topology Suite
- MVVM
- Coroutines
AOK Systems
09.2019 - 12.2020
AOK Bonus-App
Redesign of the health app with a new single-activity navigation concept.
- Certificate Pinning
- Single-Activity Navigation
- Statutory Health Insurance
- Kotlin
- MVI
- RXJava
- Magnet DI
- ConstraintLayout
- OkHttp
komoot GmbH
11.2015 - 09.2019
komoot Android App
New features and ongoing maintenance for the komoot app.
- 3M+ Downloads
- Bluetooth LE Integration
- Outdoor Navigation
- Kotlin
- Coroutines
- LiveData
- Bluetooth LE
- MVC
- MVVM
Contargo
2022 - 2023
Logistics Management App
Apps for logistics and transport management. Every shipment stays traceable in real time, even when the connection drops.
- Real-Time Tracking
- Maps Integration
- Offline Synchronization
- Kotlin
- Android
- GPS/Location
- Real-time APIs
- Maps Integration
- Offline Sync
Montblanc
2020 - 2022
Brand App with Shop
The Montblanc brand app: brand experience and shop in one, including payment processing.
- E-Commerce Integration
- Payment Processing
- Premium UI
- Android
- Kotlin
- E-Commerce APIs
- Payment Integration
- Premium UI/UX
Our Members
Member Details
Learn more about our independent specialists and their expertise
Tobias Boehm
Senior Android Developer
- Years
- 10+
- Companies
- 5+
- Projects
- 8+
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.
10.2024 - ongoingIBM
Freelance Senior Android Developer
Maintenance and further development of the electronic health record (ePA) v3.0 and v3.0.5.
- Android
- Kotlin
- Compose
- Coroutines
- KMP
- MVI
- MVVM
01.2024 - 09.2024blueworld GmbH
Freelance Senior Android Developer
Architectural and structural redesign of the Tracemate Android App.
- Clean Architecture
- Kotlin
- Coroutines
- RXJava
- MVI
- Dagger2/Hilt
09.2023 - 01.2024congstar
Freelance Senior Android Developer
Modularization of the main app and introduction of code quality controls.
- Kotlin
- Jetpack Compose
- Clean Architecture
- ktlint
- detekt
05.2023 - ongoingMNDXT
Mobile & Backend Developer
Full-stack development of an AI content generation app "Mind Extension".
- Android
- Kotlin
- Compose
- Ktor
- Google Cloud
- OpenAI GPT
02.2022 - 08.2023RTL
Senior Android Developer (Contract)
Media streaming solution RTL+ Music/MPA. Responsible for the podcast area.
- Kotlin
- Dagger/Hilt
- GraphQL
- Coroutines
- MVVM
- Jetpack Compose
Free Consultation
Contact
Ready to discuss your project? Let's connect and explore how we can help.
Direct Contact
Email
tobias@appbaumeister.dePhone
+49 162 1565538Free Consultation
Book 15min Call