This overview compares European development companies working with React Native, Flutter, Kotlin Multiplatform, Xamarin, and other shared-code technologies. The list covers focused mobile studios, full-cycle product teams, outsourcing providers, and developers suited to regulated or AI-heavy applications.
Gilzor develops cross-platform mobile applications for startups, small and medium-sized businesses, and established product teams. Its engineers use React Native to keep iOS and Android versions aligned while supporting platform-specific functionality when a product requires it. Mobile projects can include product discovery, interface design, backend integration, QA, publishing, and post-release maintenance.
The company also takes over unstable or incomplete applications. This work may involve correcting architecture, rewriting network layers, addressing crashes, improving performance, or resolving compatibility problems across devices. With offices in Warsaw and Limassol, Gilzor is suited to businesses that need both initial product development and practical technical troubleshooting.
Tapptitude is a mobile product company headquartered in Cluj-Napoca, with additional offices in London and New York. Its cross-platform work covers both React Native and Flutter, alongside native iOS and Android engineering. The team handles product definition, UX/UI, development, code audits, testing, and ongoing product improvement.
React Native is used for applications that need a shared iOS and Android codebase while retaining access to native modules. Flutter is another option when visual consistency and a shorter initial delivery cycle are central requirements. Tapptitude’s published work spans commerce, real estate, hospitality, healthcare, and other consumer-facing products.
A-Listware provides software development teams for businesses that need additional engineering capacity or managed project delivery. Its mobile capabilities include native and cross-platform application work, supported by UX/UI design, testing, cloud engineering, and legacy modernization services.
The company’s model differs from that of a small mobile studio. It primarily assembles and manages development teams that can join an existing client structure or take responsibility for a broader software initiative. This can work well for European businesses that already have product leadership in place but need to add mobile developers, QA specialists, backend engineers, or infrastructure expertise.
Netguru provides cross-platform mobile development using React Native, Flutter, and Kotlin Multiplatform. Its services cover early technical consultation, product design, mobile engineering, backend development, testing, and support after release. The company also helps businesses expand or modernize existing applications.
Published projects include a React Native commerce app for Sportano and a Flutter laboratory application for Merck. That range makes Netguru relevant to both customer-facing platforms and specialized internal products. Its broader capabilities in commerce, AI, backend systems, and team extension are useful when a mobile application forms one part of a larger digital platform.
.webp)
Mobian Studio develops custom mobile and web applications from Tallinn. Its mobile stack includes Flutter for cross-platform products, as well as Swift and Kotlin when native development is more appropriate. The studio works with industries such as healthcare, fintech, logistics, and retail.
Businesses can use Mobian for full product delivery or add its engineers to an existing team. Its offering extends beyond the mobile interface to backend development, cloud infrastructure, quality assurance, and connections with existing systems. This makes the studio more relevant to applications with operational or regulated workflows than to projects requiring only a simple promotional app.
Droids On Roids is a Wrocław-based mobile and web development company operating as part of the Apadmi Group. It provides dedicated cross-platform services using Flutter and also works with native Android and iOS technologies. Projects can cover discovery, interface design, development, release, scaling, and maintenance.
Its cross-platform offering is designed for businesses that want one codebase across mobile, web, or desktop environments where the framework is suitable. The team also supports migration from native applications and works with integrations involving payments, connected devices, health data, and logistics systems. Its mobile-first background is useful when platform behavior requires more attention than a general software agency may provide.
21century.tech operates as an AI-native software studio where senior engineers use AI tools to accelerate coding, testing, documentation, and refactoring. Its work covers MVP development, full-stack features, legacy code updates, third-party integrations, CI/CD, and deployment to client or studio-managed infrastructure.
The company may be relevant when a cross-platform product needs rapid prototyping, backend work, integrations, or an existing codebase reworked under tight time constraints. Its public website does not name Flutter, React Native, or another mobile framework, so businesses should confirm the required mobile stack before treating it as a dedicated cross-platform development provider.
Miquido develops mobile applications using Flutter and React Native alongside native technologies. Its services extend from mobile business strategy and product design to engineering, cloud infrastructure, AI integration, UX audits, and post-launch development.
The Kraków company is particularly relevant when a cross-platform app must connect with a larger web or enterprise environment. Its published expertise covers fintech, logistics, travel, entertainment, healthcare, and commerce. Miquido can also help businesses assess whether shared-code development is appropriate or whether parts of the application should remain native, which matters when performance, hardware access, or future migration plans affect the technical choice.
Itexus provides full-cycle mobile development with a pronounced focus on financial technology. Its cross-platform engineers work with Flutter and Xamarin, while its wider mobile practice also covers native iOS and Android development. Services include discovery, prototyping, UX/UI, backend development, third-party integrations, testing, app store submission, and maintenance.
The portfolio includes mobile wallets, banking products, video applications, tracking tools, and healthcare software. Its financial background makes Itexus particularly relevant when an app needs payments, authentication, financial data aggregation, KYC, or connections with banking services. The company is headquartered in the United States and maintains a development office in Warsaw.
Hedgehog Lab develops cross-platform applications from its headquarters in Newcastle. The company works with Flutter and React Native, covering product discovery, UX research, interface design, application engineering, systems integration, analytics, and continued optimization.
Its portfolio includes products in financial services, health, transport, food supply, and public-facing cultural experiences. The team’s API-first approach is useful for applications that must connect with browser-based platforms, CRMs, ERPs, or other back-office systems. Hedgehog Lab also handles analytics and product management after release, making it a reasonable fit for organizations planning continuous development rather than a single fixed launch.
OSKI Solutions builds native and cross-platform mobile applications for iOS and Android. Its mobile offering includes UI/UX design, testing, maintenance, cloud services, system integration, and backend engineering using technologies such as .NET, Node.js, Python, and PHP.
The company works across travel, fintech, e-commerce, education, healthcare, insurance, and logistics. This technical range makes OSKI more suitable for mobile applications that must exchange data with cloud platforms or existing operational systems. It can also provide dedicated teams when clients need ongoing capacity rather than complete outsourced delivery.
Waracle develops mobile products for financial services, healthcare, energy, mobility, and public-sector organizations. Its teams work with React Native, Flutter, Kotlin Multiplatform, and .NET MAUI, as well as native Android and iOS technologies.
Rather than treating cross-platform development as the default for every project, Waracle evaluates factors such as device access, expected performance, existing technology, budget, and maintenance requirements. This approach is valuable for enterprise products where a shared codebase may still require native modules or platform-specific expertise. Its services extend from early business cases and discovery through development, release, and optimization.
.webp)
Net-devs provides senior-led enterprise software development from Warsaw. Its engineering capabilities cover .NET, JVM, Node.js, Python, Go, React, Angular, Vue, Azure, AWS, and Google Cloud. Engagements can include discovery, prototyping, architecture, development, automated and manual testing, deployment, and continued iteration.
For a cross-platform mobile product, net-devs is most relevant to the systems surrounding the application, including cloud infrastructure, APIs, business logic, integrations, and modern web interfaces. The company describes itself as stack-agnostic, although its current public service pages do not identify a dedicated Flutter or React Native practice. Buyers should confirm mobile frontend availability during the initial scoping stage.
The Distance is a UK app development agency focused on React Native products. It develops new applications, MVPs, and long-term mobile platforms while also reviewing, improving, or rebuilding existing React Native codebases.
Its work includes product design, backend integration, testing, deployment, security, and support after launch. React Native is used to maintain a shared codebase across iOS and Android, with native code introduced when hardware access or specialized functionality requires it. The agency is a practical option for companies that want a mobile specialist and expect the application to remain under active development after its first release.
Future Mind develops native and cross-platform mobile applications from offices in Warsaw and Tychy. Its shared-code capabilities include Flutter, React Native, Compose Multiplatform, and Kotlin Multiplatform. The company also provides product strategy, interface design, web development, cloud services, IoT engineering, QA, and maintenance.
Much of its published mobile work concerns retail, loyalty, commerce, travel, insurance, payments, and field operations. These projects often connect mobile apps with POS systems, CRMs, IoT devices, payment infrastructure, or large operational backends. Future Mind is therefore better suited to complex consumer and enterprise ecosystems than to a small standalone application with limited integrations.
%20(3).webp)
SoftPro is a Warsaw software development company working across custom applications, web platforms, cloud infrastructure, and artificial intelligence. Its technical background centers on the Microsoft ecosystem, including Azure, ASP.NET, .NET Core, and C#, alongside frontend and backend technologies such as React and Node.js.
Within a cross-platform mobile project, the team is better positioned for backend systems, cloud deployment, APIs, business portals, and integrations than for a clearly documented mobile-only engagement. SoftPro’s current service pages do not specify React Native, Flutter, or another cross-platform framework, so the mobile delivery model and available specialists should be discussed before project planning begins.
Cross-platform development sounds simple on paper: one codebase, two major mobile platforms, less duplicated work. In practice, the framework is only part of the decision. A team that understands architecture, native integrations, testing, and long-term maintenance will usually matter more than whether React Native or Flutter appears at the top of its technology list. The companies covered here take noticeably different approaches, from focused mobile studios to larger engineering partners and AI-oriented developers.
Before narrowing the list, look at the product you are actually trying to build. A straightforward MVP has very different demands from a banking app, connected healthcare platform, or retail product used by millions of people. Ask potential partners why they recommend a particular framework, what parts may still require native code, and how they plan to support the app after launch. Those answers tend to reveal far more than a polished portfolio page.
