Freelancer profile translated to English.
Back to original languageAbout Paul
As an app developer, it's important to me that we find the solution that truly suits you. I focus on open communication and genuine collaboration. With Flutter, Serverpod, and a well-thought-out architecture, I build apps that scale, are fun to use – and help your product grow.
Reliability & Speed
You won't get an agency structure, but direct implementation – with experience, empathy, and focus.
Full-Stack from a Single Source
Frontend with Flutter, Backend with Serverpod or Firebase – including DevOps, Testing & Monitoring.
Business Acumen
I understand how product development works – and will help you build digital products with real added value.
Remote or in Hamburg
I work remotely – but if you wish, also on-site in Hamburg or the surrounding area.
German
Native or bilingual
English
Fluent
Can work on-site
Hamburg (up to 50km)
Experience
- Yourny Travel & LeisureTravel Platform for Group BookingsTRAVEL AND TOURISMFebruary 2025 - August 2025 (6 months)Hamburg, GermanyFull-Stack Mobile App Development with Flutter and Serverpod for a travel platform – including booking logic, payment integration, real-time features, and DevOps setup. Development of a comprehensive travel platform with hotel booking workflows, vacation planning for multiple participants, and payment processing via Mollie. Backend development with Serverpod, PostgreSQL database management for 3 million hotel records, and integration of Google Places API.
- Frontend / App: Flutter/Dart Development – Mobile App Development with BLoC State Management
- Backend & Cloud Services – Serverpod Integration, Firebase (Auth, Analytics, Remote Config) and Real-time Communication
- Mobile Platform Expertise – Deep Linking, Push Notifications, and Platform-Specific Integrations
- UI/UX & Localization – Custom Design System, Animations, Localization, OpenStreetMap
- DevOps & Quality – Code Generation, Integration Tests, Error Reporting with Sentry
- Backend / Server: Dart & Serverpod – Backend Development for Full-Stack Applications and Real-time Features
- PostgreSQL & External APIs – Database Management with 3 Million Hotel Records, Google Places, Mollie (Payments), and Firebase Authentication
- Industry Knowledge Tourism – Hotel Booking Workflows, Vacation Planning with Multiple Participants, Payment Processing, and Accommodation Search Systems
- DevOps & Cloud – Docker Containerization, VPS Deployment, Environment Management, and Sentry Monitoring
- Performance & Scalability – Database Optimization, Parallel Processing, and Large-Scale Data Synchronization for Hotel Information
- Elea.aiLaboratory Information System for Medical LaboratoriesMEDICALApril 2024 - February 2025 (10 months)Hamburg, GermanyLaboratory Information System for medical laboratories with barcode and document scanner functionality. Development of the first MVP in close collaboration with company management. Integration of camera-based scanners for barcodes and documents, embedding into a top team with consistently high performance under pressure.
- Development of the first MVP
- Barcode scanner via device camera
- Document scanner via device camera
- Close collaboration with company management
- Embedding into a top team with consistently high performance under pressure
- Agile way of working, Kanban
- St. LeonhardsHydration Tracker App for Mineral Water CompaniesAGRICULTUREDecember 2023 - April 2024 (4 months)Hamburg, GermanyWater tracker for customer loyalty with Health API integration. Taking over and further developing an existing prototype with close consultation and planning with project management. Connecting Apple and Google Health APIs, implementing the design with animations, and connecting the internal API.
- Taking over an existing prototype
- Close consultation and planning with project management
- Connecting Apple and Google Health APIs
- Implementing the design
- Connecting the internal API
- Animations
- Agile way of working, Kanban
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Education
- Bachelor of Science - B. Sc.Technische Hochschule Mittelhessen2019