European JavaScript development companies cover everything from React and Vue frontends to Node.js backends, TypeScript platforms, SaaS products, and legacy modernization. This list brings together companies with established JavaScript capabilities and a European presence, helping businesses compare technologies, services, and project focus.
1. Gilzor
Gilzor develops custom web products using JavaScript and TypeScript across frontend and backend systems. Its frontend stack includes React, Next.js, and Redux, while backend development covers Node.js, NestJS, and Express.
The company also handles UI/UX design, QA, maintenance, and ongoing product development. With locations in Warsaw and Limassol, Gilzor can support European startups and established product teams that need development and post-launch support from one provider.
Key Facts
Best for: Startups and product teams building custom web applications
Netguru develops web applications using React, Node.js, and other frontend and backend technologies. Its services extend beyond engineering into product discovery, design, cloud development, and ongoing product improvement.
Its JavaScript capabilities are relevant to both frontend applications and full-stack platforms. The company can suit businesses that need a multidisciplinary product team rather than a provider focused exclusively on one development framework.
Key Facts
Best for: Larger web products and multidisciplinary digital projects
Core services: Web development, product design, software development, cloud services
Technologies: React, Node.js, JavaScript, Ruby on Rails, Python
Location: Poznań, Poland
Notable strength: Combining JavaScript development with wider product engineering services
Contact Information
Website: www.netguru.com
Email: hello@netguru.com
Address: ul. Małe Garbary 9, 61-756 Poznań, Poland
LinkedIn: www.linkedin.com/company/netguru
3. OSKI Solutions
OSKI Solutions provides JavaScript and TypeScript development for client-side and server-side applications. Its technology stack includes React and Vue for frontend development, with Node.js, NestJS, and Express used for backend projects.
The team also works with Next.js, GraphQL, Vite, and Jest. Beyond new software development, OSKI handles legacy modernization, accessibility improvements, and performance optimization, which can be useful for companies working with existing JavaScript applications.
Key Facts
Best for: Custom web platforms and modernization of existing applications
Notable strength: Frontend and backend JavaScript development combined with modernization services
Contact Information
Website: oski.site
Email: contact@oski.site
LinkedIn: www.linkedin.com/company/oski-solutions
4. Infinum
Infinum develops web applications with technologies including React, Next.js, Angular, TypeScript, and Node.js. Its services also cover product strategy, UX/UI design, quality assurance, and application maintenance.
The company operates across several European markets and works on projects that require both technical development and product design. This broader delivery model can suit companies looking for a team that can stay involved throughout the product lifecycle.
Key Facts
Best for: Digital products requiring design and engineering under one delivery model
Core services: Web development, product design, QA, software engineering
Location: European offices including Zagreb, Ljubljana, London, and Amsterdam
Notable strength: Multidisciplinary product teams with frontend and backend JavaScript capabilities
Contact Information
Website: infinum.com
Email: hello@infinum.com
Phone: +44 7989 564993
Address: 8 Devonshire Square London EC2M 4PL
LinkedIn: www.linkedin.com/company/infinum
Instagram: www.instagram.com/infinumcom
Facebook: www.facebook.com/infinumcom
Twitter: x.com/infinum
5. Brainhub
Brainhub focuses heavily on JavaScript, TypeScript, and .NET software development. Its web technology stack includes React, Next.js, Vue, Node.js, and NestJS.
The company works on complex web products, software modernization, and development team extension. Brainhub became part of the STX Next group while continuing to operate under its established brand, giving clients access to a wider engineering organization.
Key Facts
Best for: Complex web products, modernization, and team augmentation
Core services: Web development, software engineering, cloud services, QA
Notable strength: Strong JavaScript focus within a larger software engineering group
Contact Information
Website: brainhub.eu
Email: sales@brainhub.eu
Phone: +48 733 707 758
Address: Górnych Wałów 26, 44-100 Gliwice, Poland
LinkedIn: www.linkedin.com/company/brainhub-pl
Facebook: www.facebook.com/brainhubapps
6. A-listware
A-listware provides web development and dedicated engineering teams for companies that need additional technical capacity. Its frontend technology coverage includes React, Angular, Vue, Next.js, Meteor, and Ember, while Node.js is among its backend technologies.
The company also works with .NET, Java, Python, PHP, and Go. This broader technology mix can be useful for companies whose JavaScript applications need to connect with existing enterprise platforms or backend services.
Key Facts
Best for: Dedicated development teams and mixed-technology software projects
Core services: Web development, dedicated teams, software development, QA
Location: UK office with European development hubs in Poland, Ukraine, and Romania
Notable strength: JavaScript development within broader dedicated team engagements
Contact Information
Website: a-listware.com
Email: info@a-listware.com
Phone: +44 (0)142 439 01 40
Address: St. Leonards-On-Sea, TN37 7TA, UK
Facebook: www.facebook.com/alistware
LinkedIn: www.linkedin.com/company/a-listware
7. Monterail
Monterail has a strong focus on JavaScript product development, particularly Vue.js and Nuxt. The company also works with Node.js, React Native, Flutter, and Ruby on Rails.
Its projects include web and mobile products across industries such as fintech, healthcare, and e-commerce. Teams planning a Vue or Nuxt application may find Monterail particularly relevant because these technologies are a significant part of its development practice.
Key Facts
Best for: Vue.js and Nuxt applications
Core services: Web development, mobile development, product design, software consulting
Notable strength: Established Vue.js and Nuxt development practice
Contact Information
Website: www.monterail.com
Email: hello@monterail.com
Phone: +48 533 600 136
Address: ul. Oławska 27-29 50-123 Wrocław
LinkedIn: www.linkedin.com/company/monterail
Facebook: www.facebook.com/monterail
8. Imaginary Cloud
Imaginary Cloud develops digital products using React, Next.js, TypeScript, and Node.js. Its frontend services cover interface development and application architecture, while Node.js supports APIs and backend systems.
The company also provides product design, UX/UI, data, and AI development. This combination can work well for projects where JavaScript development is part of a wider digital product initiative.
Key Facts
Best for: React and Node.js digital products
Core services: Web development, product development, UX/UI, data and AI services
Technologies: React, Next.js, TypeScript, Node.js
Location: Lisbon and Coimbra, Portugal, plus London, UK
Notable strength: Full-stack React and Node.js product development
Contact Information
Website: www.imaginarycloud.com
Email: info@imaginarycloud.com
Phone: +44 747 656 3437
Address: Northside House, Mount Pleasant, Cockfosters, EN4 9EB
The Software House works extensively with Node.js and TypeScript for custom web application development. Its technology coverage also includes GraphQL, cloud infrastructure, and AWS.
The company can be a relevant option for backend-heavy JavaScript projects where application architecture, cloud services, and scalability are important parts of the development process.
Key Facts
Best for: Node.js backends and TypeScript web platforms
Core services: Software development, web development, cloud engineering, product development
Technologies: Node.js, TypeScript, GraphQL, AWS
Location: Gliwice and Warsaw, Poland
Notable strength: Backend JavaScript and cloud-oriented application development
Merixstudio develops JavaScript-based products using technologies such as React, Next.js, and Node.js. Its development work covers SaaS products, custom web applications, enterprise systems, and other digital platforms.
Product design and frontend engineering are also part of its service offering, allowing businesses to work with one team across interface design, application development, and backend implementation.
Key Facts
Best for: React and Next.js applications with custom backend requirements
Core services: Web development, product design, frontend development, backend development
Technologies: React, Next.js, Node.js, JavaScript
Location: Poznań, Poland
Notable strength: Combining product design with full-stack JavaScript development
Contact Information
Website: www.merixstudio.com
Email: m.bien@merixstudio.com
Phone: +48 570 233 207
Address: ul. Małachowskiego 10 61-129 Poznań, Poland
LinkedIn: www.linkedin.com/company/merixstudio
Instagram: www.instagram.com/merixstudio
Facebook: www.facebook.com/worldofmerix
11. net-devs
net-devs works on enterprise software across several technology ecosystems. Its JavaScript and TypeScript capabilities include React, Angular, Vue, and Node.js.
The company also works with .NET, JVM languages, Python, Go, and major cloud platforms. This makes it relevant to enterprise projects where JavaScript applications need to connect with cloud infrastructure, existing APIs, or software written in other languages.
Key Facts
Best for: Enterprise applications and integrations involving multiple technology stacks
Notable strength: JavaScript development within broader enterprise architecture projects
Contact Information
Website: net-devs.com
Email: contact@net-devs.com
Phone: +48 571 282 759
Address: Obrzeżna 1D, 02-691 Warsaw, Poland
LinkedIn: www.linkedin.com/company/net-devs
12. Geniusee
Geniusee provides frontend and backend development using a broad range of JavaScript technologies. Its frontend stack includes React, Next.js, Vue, and Angular, while Node.js is used for backend development.
The company also works with TypeScript, REST APIs, and GraphQL. This combination gives product teams flexibility when choosing a frontend framework while keeping JavaScript or TypeScript across much of the application stack.
Key Facts
Best for: Full-stack web products using mainstream JavaScript frameworks
Core services: Web development, software development, product engineering
Location: European offices in Warsaw, Stockholm, and Kyiv
Notable strength: Broad coverage of modern frontend frameworks and Node.js
Contact Information
Website: geniusee.com
Email: info@geniusee.com
Phone: +46 72 837 63 91
Address: Ul. Adama Branickiego 21/U3, 02-972 Warsaw, Poland
LinkedIn: www.linkedin.com/company/geniusee
Instagram: www.instagram.com/geniusee_software
Facebook: www.facebook.com/geniuseesoftware
13. Neoteric
Neoteric develops web applications with technologies including React, Node.js, Angular, and NestJS. AWS is also part of its cloud development stack.
The company works on both standard web applications and products involving data or AI functionality. This can make it relevant for businesses building JavaScript interfaces that need to interact with machine learning, analytics, or data-heavy backend systems.
Key Facts
Best for: Web applications with data or AI components
Core services: Web application development, AI development, product design
Notable strength: JavaScript product development combined with AI engineering capabilities
Contact Information
Website: neoteric.eu
Address: Marynarki Polskiej 163, 80-868 Gdansk, Poland
LinkedIn: www.linkedin.com/company/neoteric
14. SoftPro
SoftPro develops custom web applications using JavaScript technologies alongside Microsoft-oriented backend and cloud platforms. Its frontend work includes React and Vue.js, while backend technologies include Node.js, .NET, Python, and PHP.
The company also provides cloud, AI, and modernization services. Its technology mix can be useful for organizations that already work with Microsoft or Azure infrastructure but want to introduce modern JavaScript interfaces.
Key Facts
Best for: JavaScript applications in Microsoft and Azure environments
Core services: Custom software, web applications, cloud services, modernization
Notable strength: Connecting JavaScript applications with broader enterprise technology stacks
Contact Information
Website: soft-pro.pl
Address: Poland, Warsaw Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401
15. Keenethics
Keenethics provides JavaScript development for web applications and digital products. Its technology stack includes JavaScript, TypeScript, React, Next.js, Svelte, Angular, Vue, Meteor, Node.js, Express, and NestJS.
This wide framework coverage gives teams more flexibility when selecting an architecture. The company has a European presence across several countries, making it relevant for businesses seeking frontend and backend JavaScript expertise from a distributed European team.
Key Facts
Best for: Projects requiring flexibility across several JavaScript frameworks
Core services: JavaScript development, web development, software product development
Location: European presence including Lviv, Tallinn, Oss, Munich, and Barcelona
Notable strength: Broad frontend and backend JavaScript technology coverage
Contact Information
Website: keenethics.com
Address: Estonia Tallinn, Sepapaja tn 6. 15551
LinkedIn: www.linkedin.com/company/keen-ethics
Instagram: www.instagram.com/keen_ethics
Facebook: www.facebook.com/keenethics.development
Twitter: x.com/keen_ethics
Conclusion
Europe has a wide range of JavaScript development companies covering React, Vue, Angular, Node.js, TypeScript, and other technologies used in modern web products. The most suitable provider will depend on whether the project involves a new SaaS platform, frontend development, backend architecture, legacy modernization, or ongoing engineering support.
Technical stack matters, but it should not be the only comparison point. Companies should also consider relevant project experience, delivery model, product design capabilities, integration expertise, and long-term support. Gilzor and the other companies included here represent different approaches to JavaScript development, giving businesses several options when building or expanding web products in Europe.
.webp)
%20(7).webp)
