Xamarin Development Services
for Existing iOS & Android Apps

Maintain, modernize, or plan the next step for an existing Xamarin application with our Xamarin app development services. We support legacy Xamarin codebases and help teams prepare to migrate to .NET MAUI or other modern .NET mobile technologies.

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Supporting Existing Mobile Products with Xamarin App Development Services

For teams with an existing Xamarin codebase, the priority is usually stability, maintainability, and a practical path forward. Xamarin mobile application development often leaves valuable C# business logic and platform-specific integrations that can be preserved as the product moves toward supported .NET technologies.

  • Shared C# Code Still Has Value

    Existing Xamarin applications often contain reusable C# business logic, models, services, and libraries. A migration assessment can identify what to carry forward and what needs to change for .NET MAUI or current .NET mobile workloads.

  • Native Integrations Can Be Preserved

    Xamarin.Native and Xamarin.Forms applications may include platform-specific integrations that remain important to the product. Where compatible, those components can be retained or adapted.

  • Modernization Can Be Phased

    Moving away from Xamarin does not always require a single large rewrite. Teams can assess dependencies, shared code, UI layers, native APIs, and release constraints, then plan migration in stages around product priorities.

  • Existing .NET Skills Remain Relevant

    Because the Xamarin framework is built around C# and .NET, teams with existing .NET experience already have useful knowledge for the transition. Package compatibility, UI architecture, and platform APIs still need review, but the underlying language and ecosystem reduce some of the change.

  • Stabilization May Come Before Migration

    Some products need immediate maintenance before a broader modernization effort begins. Addressing critical defects, platform compatibility issues, or fragile integrations can help keep the application usable while the longer-term migration plan takes shape.

  • Unsupported Framework Risk Needs a Plan

    Xamarin no longer receives Microsoft support or security updates, so operating-system changes, SDK dependencies, and app-store requirements can create increasing maintenance risk over time. A clear migration path helps avoid leaving those decisions until an urgent platform change forces them.

Not sure whether to stabilize, modernize, or migrate your Xamarin app?

Our Xamarin Development Services

Existing Xamarin apps may need anything from targeted maintenance to a broader migration plan. Depending on your product and roadmap, our Xamarin application development services can support stabilization, modernization, and the transition toward supported .NET mobile technologies.

  • Xamarin Cross-Platform Modernization

    A shared C# codebase can preserve valuable business logic even when the underlying mobile framework needs to change. For Xamarin cross-platform development projects, we assess reusable components, platform-specific dependencies, and migration constraints before deciding what to retain, refactor, or replace.

  • UI/UX Modernization

    A legacy mobile product may need interface improvements before or alongside a technical migration. Our designers and engineers can update flows, review platform-specific behavior, and adapt UI components while keeping the wider modernization plan in view.

  • Xamarin Application Support

    Existing Xamarin apps may still need fixes, compatibility updates, or feature work while a longer-term migration is being planned. We can help maintain the current codebase, address priority issues, and reduce avoidable disruption during that transition.

  • Migration to .NET MAUI and Current .NET Mobile Technologies

    For products that need to move beyond unsupported Xamarin versions, migration planning starts with the existing architecture rather than assuming a one-to-one conversion. We review shared C# logic, Xamarin.Forms or native UI layers, dependencies, and platform integrations and help define and implement a suitable migration path.

  • Testing & Quality Assurance

    Modernization introduces risk around existing behavior, device compatibility, and platform integrations. Our QA specialists can combine manual and automated testing to validate critical workflows across the devices and operating-system versions relevant to the product.

  • CI/CD & Release Support

    Older mobile delivery pipelines may also need attention as Xamarin-era tooling and dependencies change. We can review build, test, signing, and release workflows and help adapt automation for App Store, Google Play, or private distribution.

  • API & Backend Integration

    Existing Xamarin applications often depend on APIs, identity systems, third-party SDKs, and backend services that need to keep working through modernization. We can review those integrations and adapt the mobile layer when APIs, authentication, or platform requirements change.

  • Custom Tech Workshops

    When a team is preparing for modernization or dealing with a specific technical gap, custom training can provide a focused way to work through it. Sessions may reflect the team’s existing Xamarin/.NET context, migration questions, or mobile-development workflows.

  • Keep your existing Xamarin product moving while you plan what comes next

Flexible Cooperation Models Built Around Your Needs

We offer flexible ways to work together depending on your goals, timeline, and in-house capacity. Whether you need long-term support, help with a defined modernization project, or focused technical input, the setup can reflect what your product and team need now.

  • Dedicated Development Teams

    Ongoing product support

    A dedicated team can support an existing Xamarin product long-term, working within your processes and alongside your internal team. You stay close to roadmap decisions while we provide the engineering capacity needed for maintenance, modernization, or migration work as priorities evolve.

  • Project-Based Solutions

    Focused modernization work

    For a defined challenge, such as stabilizing an existing app, modernizing part of the codebase, or planning a migration, a project-based setup keeps the work focused around agreed goals and deliverables. We collaborate closely from initial assessment through implementation and handover.

  • Custom Tech Workshops

    Targeted team upskilling

    If your team is working through a specific technical challenge, a custom workshop can provide focused support around the issues that matter most. The content can reflect your existing Xamarin/.NET context, migration questions, or mobile-development workflows rather than follow a fixed curriculum.

Not sure what level of support makes sense for your Xamarin product? We’ll help you find a practical way to move forward

Technologies & Tools We Use

For existing products, Xamarin mobile app development often involves a mix of legacy Xamarin components and current .NET, testing, CI/CD, backend, and monitoring tools. We work with the technologies already present in the product and the tooling needed for maintenance or migration.

  • Xamarin & .NET

    • Xamarin.Forms
    • Xamarin.Native
    • .NET MAUI
    • C#

  • UI & UX Design

    • Figma
    • Adobe XD
    • Sketch

  • Testing & QA

    • NUnit
    • xUnit

  • CI/CD & Delivery

    • GitHub Actions
    • Azure DevOps
    • Bitrise
    • Jenkins

  • Backend & APIs

    • ASP.NET Core
    • GraphQL
    • REST APIs
    • Azure Functions
    • Firebase

  • Monitoring & Analytics

    • Crashlytics
    • Sentry
    • Azure Monitor

When to Maintain or Modernize a Xamarin App

Xamarin is no longer the right foundation for new mobile applications, but it may still represent years of valuable work in an existing one. The right next step depends on what you can reuse, how urgently you need platform compatibility, and whether you can modernize gradually. Today, Xamarin development solutions are most relevant to maintenance, migration, and making the most of an existing C# codebase.

  • You have valuable C# logic worth preserving

    A mature Xamarin product may contain business logic, models, libraries, and integrations that do not need to be rebuilt from scratch. Assessing what can move into current .NET technologies helps protect that investment while reducing unnecessary redevelopment.

  • You need to keep the product running during migration

    A full migration may not fit neatly into one release cycle. Stabilizing priority areas first and moving components in stages can give your team room to continue supporting users while the underlying technology changes.

  • Your app depends on native or third-party integrations

    Platform-specific APIs, device features, authentication flows, and third-party SDKs often determine how straightforward a migration will be. Reviewing those dependencies early helps uncover compatibility gaps before they become blockers.

  • Your Xamarin.Forms UI needs a path forward

    Existing Xamarin Forms development may include screens, navigation, bindings, and UI logic that need assessment before moving to .NET MAUI. Some concepts and code may carry over, while other parts benefit from restructuring as part of the modernization work.

Still weighing what to keep and what to move forward? We can help you look at the options in the context of your existing product

Xamarin vs. Cordova: What the Comparison Means for Existing Apps

A Xamarin vs Cordova comparison is most useful today when you’re assessing an existing cross-platform app and deciding what to maintain, migrate, or replace. Xamarin and Cordova take very different approaches to shared code, native integration, and UI delivery, so the existing architecture will strongly influence the modernization path.

Architecture & Shared Code

Uses C# and .NET, with shared business logic across platforms and either Xamarin.Forms or platform-specific Xamarin UI layers.

Native Access & Performance

Provides access to native platform APIs and supports native UI approaches, making it suitable for applications with deeper device integration.

Current Support Status

Microsoft ended Xamarin support in May 2024, so existing applications should plan for migration to supported .NET technologies.

Modernization Path

Existing C# logic may often remain valuable when moving Xamarin.Forms applications toward .NET MAUI or Xamarin.Native projects toward current .NET platform workloads.

Architecture & Shared Code

Uses HTML, CSS, and JavaScript inside a native container, allowing web-oriented code and skills to be reused across platforms.

Native Access & Performance

Accesses native device capabilities primarily through Cordova plug-ins; suitability depends on the interfaces and performance requirements involved.

Current Support Status

Apache Cordova remains an active open-source project, although long-term suitability still depends on plug-in maintenance, platform requirements, and the wider application architecture.

Modernization Path

Modernization may preserve web code while reconsidering the native wrapper, plug-ins, or broader cross-platform architecture depending on the product.

If your existing app is due for a change, let us help you compare the options and find a practical way forward

Meet the People Behind the Code

Our developers bring a mix of technical expertise, product thinking, and real-world experience to every project. Depending on your product, Beetroot can connect you with engineers and other specialists across mobile and .NET development, backend systems, QA, DevOps, and UX/UI to cover the gaps your team needs help with.

  • $58/h

    Software Developer

    Denys K., C#/.NET, 4+ years of experience
    Proficient in developing and maintaining web applications using C#, ASP.NET Core, and SQL Server. Experienced in building APIs, integrating third-party services, and optimizing code for maintainability and performance. Looking to contribute to fast-paced development teams that value clean architecture and clear communication.
    • .NET
    • ASP.NET Core
    • Azure Pipelines
    • C#
    • Entity Framework
    • JavaScript
    • React
    • RESTful APIs
    • SQL

    Request full CV

  • $85/h

    Senior Software Engineer

    Viktor S., Cloud & C#, 11+ years of experience
    Viktor specializes in designing scalable cloud-native applications with C# and Azure. Skilled in leading development teams, defining software architecture, and delivering secure, high-performance systems for enterprise clients. Brings a strong mix of hands-on coding expertise and leadership to complex technical challenges.
    • .NET
    • ASP.NET Core
    • Blazor
    • C#
    • CI/CD
    • Cosmos DB
    • Microservices
    • PowerShell

    Request full CV

  • $29/h

    Middle .NET Developer

    Adam V., 2+ years of experience
    Adam boasts hands-on experience in all phases of the software development lifecycle, from gathering project requirements to design, development, testing, and implementation.
    • C#, .NET / .NET Core, C# ASP.NET Core
    • JS (React / Angular / Vue)

    Request full CV

  • $23/h

    Middle .Net Developer

    Oleksandr H., 3+ years of experience
    Skilled in .Net MVC, Web API, and Angular. Focuses on clean, maintainable code and best practices.
    • C#, .NET / .NET Core, C# ASP.NET Core

    Request full CV

  • $68/h

    Frontend Software Architect

    Serhii R., 8+ years of experience
    Frontend architect with a strong background in designing complex, high-performance user interfaces and scalable frontend architectures. Experienced in selecting component-driven frameworks, implementing design systems, and leading cross-functional teams through UI modernization efforts.
    • Agile methodologies
    • Angular Material / SCSS / Tailwind CSS / Bootstrap
    • GraphQL
    • JS (React / Angular / Vue)
    • Next.js
    • RESTful APIs
    • RxJS / NgRx / Redux / Vuex/Pinia / Riverpod
    • Storybook
    • TypeScript
    • Webpack / Vite / Nx

    Request full CV

  • $38/h

    Senior Software Engineer

    Gabriela L., 10+ years of experience
    Skilled in multiple languages, Agile, leadership, with strong communication skills.
    • PHP: PHP, Laravel, Symfony, API Platform
    • Python (Django/Flask/Fastapi)

    Request full CV

  • $22/h

    Full-Stack Developer

    Huy T., 10+ years of experience
    Passionate about coding and tech research; prefers freelancing for flexibility and travel.
    • Full-Stack
    • JS/TS: Node.js, Next.js, Express, NestJS

    Request full CV

  • $51/h

    Senior iOS Developer

    Myron O., 8+ years of experience
    Participated in 20+ projects, skilled in architecture, mobile solutions, and responsive apps.
    • Obj-C / Swift

    Request full CV

  • $52/h

    Senior Android / Flutter Developer & Tech Lead

    Andrii I., 6+ years of experience
    Andrii aligns complex systems with real-world processes for valuable products.
    • Flutter
    • Java / Kotlin

    Request full CV

Our Xamarin Development Process

Every existing Xamarin product comes with its own architecture, dependencies, and history. Whether the goal is to stabilize the current app or move toward supported .NET technologies, we adapt the process around what can be preserved, what needs attention, and how much change the product can absorb at once.

  • Planning

    Step 1

    We start by understanding the product goals, current architecture, platform requirements, and technical constraints. Together, we identify immediate priorities, migration risks, and dependencies that need to shape the roadmap.

  • Architecture & Migration Planning

    Step 2

    Engineers review shared C# logic, Xamarin.Forms or Xamarin.Native components, third-party dependencies, and platform-specific code. The findings help determine what can stay, what needs refactoring, and where a move to current .NET technologies makes sense.

  • UI/UX & Component Review

    Step 3

    Where the interface also needs attention, designers and engineers review existing flows, platform-specific behavior, and reusable UI components. They can then plan updates alongside the technical modernization.

  • Incremental Development & Migration

    Step 4

    We can combine priority fixes with gradual modernization, depending on the roadmap. Shared logic, integrations, and UI components are updated or migrated in manageable stages so the team can validate progress.

  • Testing & QA

    Step 5

    Manual and automated testing help check existing behavior across relevant devices and operating-system versions as the codebase changes. Depending on the product’s risk profile, QA can cover functional flows, integrations, performance, and platform-specific behavior.

  • Release & Transition

    Step 6

    Before releasing updated or migrated components, the team validates builds, signing, distribution workflows, and the integrations affected by the change. Rollout planning can also account for analytics, crash reporting, and rollback needs.

  • Support & Iteration

    Step 7

    If ongoing support is part of the cooperation, we can continue with platform updates, bug fixes, performance work, and further modernization as the product evolves. The level of support can change as more of the legacy Xamarin footprint is reduced.

Why choose Beetroot as your Xamarin development company?

Choosing the right Xamarin application development partner means finding a team that understands your product, communicates clearly, and can work with the realities of an existing codebase. Beetroot brings together engineering expertise, flexible cooperation, and a people-first approach to support both immediate needs and longer-term modernization.

  • Cross-Functional Expertise

    Mobile products often depend on more than the application layer alone. Depending on the challenge, we can bring in expertise across .NET, backend development, QA, DevOps, UX/UI, and other areas.

  • Experience with Real Product Constraints

    Real projects come with existing systems, changing priorities, incomplete documentation, and technical trade-offs. Our teams know how to work within those constraints while keeping the wider product goals in focus.

  • Thoughtful Onboarding

    Good onboarding starts with understanding the product, codebase, ways of working, and decisions already made. We aim to make that transition practical and give engineers enough context to become a natural extension of your internal team.

  • Clear Communication and Project Visibility

    We adapt to the tools and communication routines that work for your team and keep priorities, questions, and dependencies visible along the way. The goal is straightforward collaboration where you know what is moving forward and where decisions are needed.

  • Maintainability Beyond the Immediate Task

    Short-term fixes still need to make sense in the product’s wider lifecycle. We keep maintainability, documentation, testing, and knowledge transfer in view to make future work easier.

  • Flexible Engagement

    Your needs may change as the product moves from maintenance toward modernization or migration. The cooperation setup can change too, whether you need focused project work, longer-term engineering support, or additional expertise at a particular stage.

What Our Clients Say

We’ve worked alongside teams building web, mobile, design, and backend systems. Here’s what our clients say about working with us.

  • CEO, Stridar

    From an industry perspective, Beetroot AB’s expertise, knowledge, and competency are excellent. The administrative tasks have been highly straightforward thanks to Beetroot AB. We’ve seen a significant cost reduction of about 60%. We’ve retained 100% of the staff we’ve hired through Beetroot AB, experienced zero performance issues, and the quality of their work has met our expectations.

Featured Work

Here’s a look at mobile and cross-platform products we’ve worked on with clients across different industries and technical environments.

  • Cultural Care Au Pair

    Cultural Care Au Pair partnered with Beetroot to redesign its mobile apps and websites, improving navigation, usability, and consistency across the digital experience. The refreshed interfaces make it easier for host families and au pairs to manage more of their journey independently.

    View Case

    • Mobile app design
    • UX/UI design
    • Web design

Upskill Your Team with Custom Workshops

Cross-platform products often reach a point where the team needs to rethink architecture, tooling, or the path away from legacy components. A custom workshop can focus on the migration decisions, shared-code strategy, and practical skills that matter most for the next stage of development.

  • Focus on current knowledge gaps

    Workshop content reflects the skills the team needs to strengthen rather than following a fixed curriculum.

  • Make learning practical

    Hands-on exercises and instructor feedback connect new concepts with realistic situations the team may encounter in its day-to-day work.

  • Build shared understanding

    A focused session gives engineers a common foundation for discussing technical choices, modernization priorities, and ways of working as the product evolves.

Let’s Talk About Your Project

Have a question, migration challenge, or cross-platform product to discuss? Fill out the form, and we’ll get back to you to explore how we can support your next steps.

    FAQs

    Here are practical answers to common questions about maintaining an existing Xamarin app, planning a migration, and deciding what to carry forward.

    Nick Tykhomyrov, CBDO, Beetroot

    Nick Tykhomyrov

    CBDO