Work with proven Mobile Developers in Germany matched in minutes from over 15,000 CVs with the power of AI.
Deploy specialists in Swift, Kotlin, Flutter, and React Native for your next native or cross-platform application. Our platform connects you with vetted, available freelance professionals who integrate seamlessly into your development cycle.
About the role
Native and Cross-Platform App Engineering
Modern application development requires a deep understanding of mobile environments. Professional app programmers build responsive, high-performing applications tailored to specific operating systems or unified cross-platform frameworks. They ensure that your product runs smoothly on both iOS and Android devices while maintaining a consistent user experience across different screen sizes.
Core Technical Expertise
A qualified software engineer in this field brings a robust set of technical skills to your project:
- Native iOS development using Swift and Xcode
- Android engineering with Kotlin and Android Studio
- Cross-platform development via Flutter or React Native
- Secure integration of RESTful APIs and cloud backends
- Database management using SQLite, Realm, or CoreData
Security and Privacy in Germany
When launching digital products for the German market, compliance and data security are critical. Developers working with German enterprises must implement strict GDPR guidelines regarding user data processing and consent management. This includes securing local storage, using state-of-the-art encryption for data transmissions, and aligning with local compliance standards.
Integration and Backend Connectivity
Mobile apps do not run in isolation. Experienced developers connect front-end interfaces to complex backend systems, enterprise databases, and third-party APIs. They set up efficient synchronization protocols, handle offline data storage, and implement secure user authentication mechanisms to guarantee seamless functionality under varying network conditions.
Performance Optimization and QA
A great app must be fast and stable. Developers conduct thorough profiling to optimize memory usage, minimize battery consumption, and accelerate launch times. They write unit tests, perform automated UI testing, and manage the deployment pipeline through CI/CD systems to ensure every release meets the highest quality standards before reaching app stores.
When to Hire a Freelance Expert
Bringing in an external specialist is highly effective when your internal team lacks specific framework knowledge or needs to accelerate a launch timeline. Freelance developers help you build prototypes rapidly, migrate legacy applications to modern codebases, or resolve complex performance bottlenecks. They offer immediate support without the long-term overhead of permanent hires.
Meet FRATCH Mobile Developers
Geza Lakatos
UX Consultant
Last position:
UX Strategist & AI App Developer (AI-assisted App Strategy) at Own Projects (Nutrycoach.ai, LuxuryBandit)
Conceptualizing and developing AI-powered app MVPs from the first idea to a working product. I combine UX strategy with modern AI and no-code tools — especially Claude and Claude Code, where I work directly in the terminal on real code (React, Vite), complemented by Figma, Bolt.new, and Base44 — to quickly validate and build product ideas. Personal platforms: Nutrycoach.ai (AI nutrition coaching with role-based dashboards for clients, coaches, and admins, AI meal analysis, and a scalable design system) and LuxuryBandit (content/creator app). This led to my own practice 'AI-assisted App Strategy', which combines human creativity, UX logic, and intelligent automation.
Felix Schaller
Systems Engineer & Software Architect
Last position:
App Developer at XIXUM-Modeler
- Developing a model-based AI where natural language is interpreted as formal relations.
- Natural language terms are not considered rigid but fluid and can be negotiated in a context so meaning resolves by iteratively specifying.
- Develops all kinds of model solutions.
- Backed by natural language and data annotation.
- Requirements to code and other solutions.
James Cullimore
Freelance Android Developer
Last position:
Freelance Android Developer at Normalis
- Working on Telecommunication Apps on Android under NDA for the Military
- Participation in the development of backend services (Spring, Java)
- Android Development, Kotlin, Compose, REST, JSON, State-Machines, Android Studio, IP Communication, Cybersecurity, Agile
Felix Heller
App Engineer
Last position:
App Engineer at Merck KGaA
- Further development of various apps in the context of a Digital Trust Framework / IIoT
- Programming language: Dart
- Technologies & frameworks: Flutter, Stacked, CI/CD
Hannes Duve
Mobile App Developer
Last position:
Mobile App Developer at wikifolio
- Development and maintenance of a cross-platform mobile app with React Native (iOS/Android)
- Planning and implementing new features as well as optimizing existing functionality
- Implementing a native rich text editor (comment feature)
- Creating dynamic tables and charts including animations
- Integrating deep and native linking (Branch.io)
- Setting up and maintaining automated tests with Jest and Maestro
- Conducting code reviews to ensure code quality
- Working with CI/CD processes and automated release pipelines
- Collaborating closely with backend, design, and product teams
Muhammad Zubair
Sr. Mobile Developer
Last position:
Sr. Mobile Developer at Firsty
- Worked on ideation phase through deployment; managed the team and implemented the core architecture
- Developed Firsty Travel eSim: native eSIM installation with a single click; seamless user authentication; real-time data synchronization; intuitive user interface design; advanced security protocols; integration with third-party services; high performance and scalability
- Developed WIO Business banking app: spend, save, invest, and control entire transaction process
- Technologies: Flutter, iOS, Android Studio
Sven Busse
Frontend Developer
Last position:
Frontend Developer at TQGG
- Reimplementation of the ESN.com online shop with Shopify's Hydrogen and Remix
- Headless CMS Contentful integration via GraphQL
Anurag Kurumaddali
Software Development Engineer - Mobile
Last position:
Software Development Engineer - Mobile at Krian GmbH
- Engineered the App-Connect module for Volkswagen HMI systems (Passat, Golf, ID series), reducing smartphone pairing time by 30%.
- Developed SABGWALA, a Flutter-based e-commerce app with Clean Architecture, increasing daily active users by 40%.
- Delivered Det-Medex, an Android ML app using MediaPipe, improving real-time body tracking by 25%.
- Integrated a TensorFlow module into the Android and iOS modules of the Det-Medex app, using Jetpack Compose for design and Kotlin for the camera module.
- Utilized Firebase Core, Firebase Auth, and Firebase Cloud Storage for backend services.
- Implemented Clean Architecture with Get_It for dependency injection.
- Managed routing with Go_router and state management with flutter_bloc.
- Supported both German and English languages in the application.
- Developed and maintained the App-Connect application for Volkswagen, improving connectivity reliability with Apple CarPlay, Android Auto, and MirrorLink by 20%.
- Enhanced user interface and experience, resulting in a 15% increase in user satisfaction.
- Implemented robust Bluetooth and USB connectivity features, reducing connection errors by 25%.
- Collaborated with cross-functional teams in an agile environment, leading to on-time delivery of key milestones.
Fatih Karakurt
Mobile App Developer
Last position:
Mobile App Developer at ING Belgium
- Part of a squad focused on intensive module development and integration
- Close collaboration with other squads and teams to integrate modules and essential components
- Use of SwiftUI and the Coordinator pattern to develop clean and understandable code
- Creative collaboration with UX designers in Figma and implementation in code
- Industry: Banking
- Project language: English
- Organizational form: Kanban
- Tools: Azure, Confluence, Figma, Teams
- Team size: 40 people
- Version control: Git, GitFlow, Azure
- App Store product: ING Banking
- Programming languages: SwiftUI, Swift
- Patterns: Coordinator, MVVM
- Swift Package Manager
- Localization: Yes
- Testing: XCTest, XCUITest
Ilker Baltaci
Freelance Mobile Developer
Last position:
Freelance Mobile Developer at B+S Banksysteme AG
Developed the SecureMessaging Android and iOS app (authorization medium) to approve transactions in M.M.Warburg Bank's online banking.
Developed a performance-optimized stock trading app for iOS and Android.
Designed architecture for scalable white-label applications in the iOS and Android environment for banks and financial institutions.
Refactored outdated libraries and modernized the codebase of existing apps.
Migrated from XML to Jetpack Compose (Android) and from Xib/Storyboards to SwiftUI (iOS).
Advised on security issues and implemented CI pipelines to optimize workflows.
Matthias Eymers
Lead Android Developer
Last position:
Lead Android Developer at Star Finanz-Software Entwicklung und Vertriebs GmbH
- Continued development of the Android app "StarMoney"
- Major XML to Compose redesigns
- Introduction of new technologies and architecture
- Implementation of real-time transfers
- Development using agile Scrum methodology
Michael Krohn
Flutter & TYPO3 Developer | Mobile Apps, Web & AI Integration
Last position:
Mobile Developer at JAKOTA Design Group GmbH
Jörg Birkhold
Lead Engineer iOS / Android
Last position:
Lead Engineer iOS / Android at Sonamedic Gmbh
- Build cross-platform mobile applications using Swift, Flutter, and Python (Flask/FastAPI)
- Develop front-end components with React
- Design and manage SQL, PostgreSQL, and NoSQL database systems
- Ensure product quality through pragmatic, structured development practices
Discover over 15,000 top freelancers
Mobile Developers statistics
Typical experience
16 years
Average project duration
3 years
Certifications per freelancer
1
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Banking and Finance
Most common languages
German, English, Spanish
Bachelor's degree or higher
70%
Master's degree or higher
30%
Salary / Daily Rate Distribution
The chart shows how the daily rates of freelancers in this role are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Average rates for Mobile Developers & Seniority distribution
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Frequently Asked Questions
Got questions? Learn key details about FRATCH right now
A native mobile developer specializes in building applications specifically for either iOS using Swift or Android using Kotlin, utilizing platform-specific features to their full potential. In contrast, a cross-platform specialist uses frameworks like Flutter or React Native to write a single codebase that runs on both operating systems, which is often faster and more cost-effective for standard business applications.
Experienced iOS developers manage the entire release cycle, which includes configuring App Store Connect, setting up certificates, and preparing metadata. They ensure your application complies with Apple Review Guidelines to avoid rejection and facilitate a smooth launch.
While an Android engineer primarily focuses on the client-side application, many possess strong knowledge of backend technologies and API design. If your project requires extensive server-side work, it is usually best to hire a dedicated backend developer to collaborate with the mobile specialist.
In Germany, a mobile app programmer must strictly adhere to GDPR compliance regarding user data protection and privacy consent. This involves implementing secure data storage, encrypting network traffic, and ensuring that no unauthorized tracking occurs within the application.
Most freelance mobile developers work fully remote, collaborating via video calls, Slack, and Git repositories. Occasional on-site visits in Germany can be beneficial for initial alignment workshops, hardware testing, or final integration phases, depending on your project requirements.
While English is the standard language for code and technical documentation, hiring a software engineer who speaks German can be highly beneficial for communicating with local stakeholders or translating specific business requirements. Many freelancers in Germany are fluent in both languages.
You can evaluate a mobile developer by reviewing their portfolio of published app store applications, inspecting their public repositories on GitHub, or conducting a technical code review. A strong professional will write clean, documented code and follow established architectural patterns like MVVM or Clean Architecture.
Hiring a freelance mobile developer provides direct communication, greater flexibility, and lower overhead costs compared to an agency. You work directly with the specialist writing the code, allowing for faster feedback loops and seamless integration into your existing team.
Request a Free Demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
