Hire Xamarin Developers for
App Maintenance & Migration
Keep your existing Xamarin application reliable, improve its performance, and prepare it for the future with experienced mobile development support. AppCrex can help businesses maintain legacy Xamarin apps, resolve technical issues, enhance existing features, and plan a migration to modern .NET technologies.
Need help with an existing Xamarin app?
Hire Xamarin Developers for Your Existing Mobile Application
Looking to hire Xamarin developers to maintain, upgrade, or modernise your existing mobile application?
Xamarin was widely used to build cross-platform applications for Android and iOS using C#. Although Microsoft has ended official Xamarin support, many businesses still have applications built with Xamarin that require maintenance, troubleshooting, feature improvements, and migration planning.
AppCrex can help you assess your existing application, identify technical issues, improve current functionality, and plan the next stage of your mobile product.
Whether you need help with a legacy Xamarin.Forms application, Xamarin.Android, or Xamarin.iOS project, the right development approach depends on your existing codebase, dependencies, business requirements, and long-term technology goals.
Our Xamarin Development Services
We support businesses that need to maintain existing Xamarin applications or transition them to a modern technology stack.
Xamarin App Maintenance
Keep your existing Xamarin application running smoothly with ongoing technical support.
Our maintenance services can include:
- Bug fixing and troubleshooting
- Performance optimisation
- Code review and refactoring
- Dependency assessment
- Existing feature improvements
- Technical documentation
- Build and deployment troubleshooting
Xamarin.Forms App Development Support
Xamarin.Forms applications may require additional attention because the framework is no longer officially supported.
We can help assess your existing Xamarin.Forms codebase, identify outdated dependencies, resolve application issues, and plan an upgrade to .NET MAUI where appropriate.
Xamarin API Integration
Existing Xamarin apps often depend on backend services and third-party APIs.
We can help review and maintain integrations involving:
- REST APIs
- Authentication systems
- Payment gateways
- Cloud services
- Push notifications
- Business software
- Third-party platforms
Xamarin.Android Development Support
For businesses maintaining existing Xamarin.Android applications, we can assess legacy code, troubleshoot issues, review dependencies, and help plan the transition to .NET for Android.
Xamarin.iOS Development Support
Our support can cover existing Xamarin.iOS applications, including codebase assessment, issue resolution, dependency review, and migration planning towards modern .NET iOS development.
Xamarin App Security Assessment
Legacy applications may rely on outdated libraries, authentication methods, or insecure configurations.
A technical assessment can identify areas that need attention, including dependency updates, secure API communication, authentication, data storage, and access control.
Xamarin Performance Optimisation
Improve the performance and usability of an existing application through code analysis and targeted improvements.
Potential areas include:
- Application startup time
- Memory usage
- API response handling
- Screen loading
- Data processing
- Network requests
- UI responsiveness
Xamarin App Migration to .NET MAUI
If your business relies on a Xamarin application, migrating to .NET MAUI can help you move towards a currently supported cross-platform development framework.
Our migration approach can include:
- Existing application assessment
- Codebase and dependency analysis
- Migration planning
- UI and navigation updates
- API and database integration checks
- Third-party library replacement
- Testing across supported platforms
- Deployment preparation
The migration effort depends on the application’s architecture, custom components, dependencies, and platform-specific code. Microsoft provides official guidance for upgrading Xamarin projects to .NET and .NET MAUI.
Why Hire Xamarin Developers?
Hiring developers who understand Xamarin can be useful when your organisation depends on an existing Xamarin application and needs specialised legacy support.
Maintain Existing Business Applications
Continue supporting your current application while evaluating the best long-term technology strategy.
Resolve Legacy Technical Issues
Address bugs, outdated dependencies, build problems, and compatibility challenges in an existing codebase.
Protect Your Existing Investment
An assessment can help determine which parts of your existing application can be retained, improved, or migrated instead of starting from scratch.
Plan a Structured Migration
Experienced developers can help identify migration risks, prioritise essential functionality, and create a phased transition plan.
Reduce Business Disruption
A carefully planned migration can help preserve important workflows, integrations, and user experience while moving towards a modern platform.
Xamarin vs .NET MAUI: Which Should You Choose?
Since Xamarin has reached the end of official support, businesses should distinguish between maintaining a legacy application and developing a new cross-platform product.
| Requirement | Recommended Approach |
|---|---|
|
Maintain an existing Xamarin app
|
Legacy Xamarin support
|
|
Fix bugs in a Xamarin.Forms app |
Xamarin maintenance and assessment
|
|
Modernise a Xamarin.Forms application |
Evaluate .NET MAUI migration
|
|
Build a new cross-platform .NET app |
Consider .NET MAUI
|
|
Upgrade Xamarin.Android
|
Evaluate .NET for Android
|
|
Upgrade Xamarin.iOS
|
Evaluate .NET for iOS
|
.NET MAUI is the evolution of Xamarin.Forms and supports cross-platform development for Android, iOS, macOS, and Windows.
The right choice depends on your application’s current condition, required platform support, business priorities, and available budget.
Our Xamarin App Migration Process
Migrating a legacy application requires more than changing the framework. The development team must understand the existing architecture, dependencies, integrations, and platform-specific behaviour.
Step 1: Application Assessment
We review the existing Xamarin project, codebase, libraries, architecture, and business requirements.
Step 2: Migration Planning
We identify migration risks, technical dependencies, required changes, and an appropriate upgrade strategy.
Step 3: Architecture Review
We evaluate the application’s structure, backend integrations, authentication, data storage, and platform-specific components.
Step 4: Code Migration
The development team migrates or adapts the relevant application components to the selected .NET target.
Step 5: UI and Feature Validation
We review screens, navigation, device functionality, and important user workflows.
Step 6: Testing
Testing covers application functionality, API integrations, performance, security, and supported devices.
Step 7: Deployment
The upgraded application is prepared for release, with appropriate build and deployment processes.
Step 8: Ongoing Support
After deployment, the application can receive maintenance, updates, performance improvements, and additional features.
How Much Does It Cost to Hire Xamarin Developers?
The cost of hiring Xamarin developers depends on whether you need short-term troubleshooting, ongoing maintenance, or a complete migration to .NET MAUI.
| Engagement Type | Indicative Cost |
|---|---|
|
Small bug fixes or technical assessment
|
500–3,000 |
|
Minor maintenance project
|
3,000–10,000 |
|
Application enhancement
|
10,000–25,000 |
|
Xamarin-to-.NET MAUI migration
|
15,000–60,000+ |
|
Complex enterprise migration |
60,000–150,000+ |
These are illustrative project estimates in USD, not fixed quotations. Actual costs depend on the application’s size, code quality, third-party dependencies, number of platforms, integrations, testing requirements, and migration complexity.
A technical assessment is the best starting point for estimating the cost of an existing Xamarin project.
What Skills Should Xamarin Developers Have?
When hiring Xamarin developers for a legacy application, look for experience in the technologies and systems used by your existing project.
Important skills may include:
- C# and .NET
- Xamarin.Forms
- Xamarin.Android
- Xamarin.iOS
- XAML
- REST API integration
- Mobile application debugging
- Dependency management
- Mobile security
- Performance optimisation
- App deployment
- .NET MAUI migration
For migration projects, experience with modern .NET, .NET MAUI, platform-specific APIs, and codebase modernisation is particularly valuable.
Hire Dedicated Xamarin Developers or Choose Project-Based Development?
The right engagement model depends on your workload and technical requirements.
| Engagement Model | Best For |
|---|---|
|
Dedicated Developer
|
Ongoing maintenance and continuous development
|
|
Project-Based Team |
Defined migration or enhancement project
|
|
Team Augmentation |
Adding legacy expertise to an existing team |
|
Technical Assessment
|
Understanding risks before committing to a migration
|
If you have a small legacy application, a technical assessment or project-based engagement may be sufficient. For a large application with ongoing business requirements, dedicated development support may be more appropriate.
Why Choose AppCrex?
AppCrex helps businesses plan and develop mobile software solutions around their product requirements.
For a Xamarin-related project, the focus should be on understanding your existing application and recommending a practical path forward.
- Existing app assessment: Understand your codebase, dependencies, and technical challenges.
- Legacy application support: Identify bugs, performance issues, and maintenance requirements.
- Migration planning: Evaluate the effort required to move towards .NET MAUI or modern .NET.
- API integration: Review backend services and third-party dependencies.
- Quality assurance: Validate essential workflows and supported devices.
- Ongoing development: Plan future improvements based on your product roadmap.
Our goal is to help you make an informed decision about maintaining, modernising, or migrating your existing mobile application.
Frequently Asked Questions
Yes. Businesses may still need developers to maintain, troubleshoot, and migrate existing Xamarin applications. However, Xamarin is no longer officially supported by Microsoft, so new projects should generally consider modern alternatives.
No. Microsoft ended official support for Xamarin SDKs, including Xamarin.Forms, on May 1, 2024.
.NET MAUI is the recommended successor to Xamarin.Forms. Whether you should migrate immediately depends on your application's condition, business requirements, dependencies, and long-term support needs.
Yes. Microsoft provides migration guidance and tools for upgrading Xamarin.Forms applications to .NET MAUI. The amount of additional work depends on the application's architecture, dependencies, and custom components.
A small migration may cost around 15,000–60,000, while complex enterprise applications can cost considerably more. A proper estimate requires reviewing the existing codebase and requirements.
Yes. You can engage developers for bug fixes, dependency assessments, performance optimisation, API integration, and ongoing maintenance of an existing application.
For new cross-platform .NET applications, .NET MAUI is generally the more appropriate option because Xamarin has reached the end of official support.
Modernise Your Xamarin Application With AppCrex
Your existing Xamarin application may still support important business operations, but its long-term maintenance strategy deserves attention.
Whether you need legacy Xamarin support, technical troubleshooting, application enhancements, or a migration plan for .NET MAUI, AppCrex can help you evaluate the next steps.
Let's discuss your existing application and find the right path forward.
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