Ranking - 5 Best React developer companies Poland - Feb 2025

Introduction

React is a JavaScript library designed for building user interfaces, particularly those that require dynamic updates and interactivity. React isn’t just another tool in the developer’s toolbox—it’s a game-changer. Unlike traditional approaches that directly manipulate the DOM, React uses something called the virtual DOM. Think of it as a lightweight copy of the real DOM that keeps things running smoothly. When the state of a component changes, React only updates the parts of the interface that need it. No more wasteful re-renders, no more slowdowns.

This is how React delivers outstanding performance, even in super complex applications. Alas, as always, there is more to it. React’s component-based architecture is what makes it truly powerful. Each UI element is a reusable component, making the codebase more modular and easier to maintain. As a result, it’s perfect for scaling apps as they grow. Initially developed by Facebook, React now boasts an entire ecosystem backed by a thriving community of developers. It’s no wonder it’s become a go-to for modern web and app development.

While React is primarily a frontend tool, it isn’t limited to client-side rendering. With frameworks like Next.js, React can also handle server-side rendering, bringing performance and SEO benefits. Compared to vanilla JavaScript, which offers full control but requires more manual effort, React provides a structured way to build complex applications. By managing state efficiently and streamlining UI updates, it simplifies development without sacrificing flexibility. Whether you’re creating a simple interactive component or architecting a large-scale web application, React offers a balance between efficiency and ease of use.

React development libraries

React has long been a staple in web and app development, and as we step into 2025, the demand for efficient UI component libraries continues to grow. Choosing the right one isn’t just about aesthetics—it’s about development speed, maintainability, and flexibility. Companies specializing in website development, mobile app development, and React development, including those in Poland, rely on these libraries to build scalable, high-performance applications. Material UI remains a go-to choice for those who appreciate Google’s Material Design principles, offering a polished and highly customizable system. Ant Design, with its structured and professional aesthetic, is often preferred for data-heavy business applications. Chakra UI takes a different route, prioritizing accessibility and modularity, making it a solid choice for projects that require adaptability.

For developers who want control over styling without sacrificing accessibility, Headless UI provides unstyled yet fully functional components. React Bootstrap bridges the gap between tradition and modernity, bringing Bootstrap’s familiar structure into React’s component-driven ecosystem. Mantine expands on this idea, integrating a robust theme engine, utility hooks, and an extensive set of well-designed components. Next UI, built on Tailwind CSS, is lightweight yet powerful, offering built-in dark mode support and an intuitive customization process. Whether for mobile development with React Native or complex enterprise solutions, the right UI library can make all the difference in delivering a seamless user experience.

NextJS as alternative to "pure" React?

Beyond component libraries, Next.js has emerged as a powerful React-based framework that takes web development a step further. Unlike React, which focuses purely on UI, Next.js enhances performance with features like server-side rendering and static site generation, making applications faster and more efficient. Industry leaders like Spotify and Nike rely on Next.js to deliver smooth, high-performance digital experiences. It’s still React at its core but optimized for modern needs—blurring the line between frontend and backend for a more seamless development process.

React market share and adoption

React has secured a dominant position in front-end web development, consistently ranking among the most widely used frameworks. According to the Stack Overflow Developer Survey 2023, React remains one of the most preferred web frameworks among professional developers, surpassing competitors like Angular and Vue.js. The State of JavaScript 2022 survey further highlights React’s strong market presence, with high satisfaction rates and a majority of developers planning to continue using it. React’s market share is also reflected in its NPM download statistics, which exceeded 20 million weekly downloads as of September 2024, significantly outpacing Angular (~2.7 million) and Vue.js (~4.3 million). Additionally, GitHub engagement metrics show React’s widespread use, with over 228,000 stars and 46,000 forks, indicating a highly active development community.

React’s adoption extends across major industries, with companies such as Meta, Netflix, Airbnb, Uber, Dropbox, Atlassian, and Salesforce integrating it into their technology stacks. Its strong market position drives high demand for developers, with over 60,000 job listings globally as of October 2023, spanning industries like technology, finance, healthcare, and e-commerce. Geographically, the highest demand is seen in tech hubs such as San Francisco, New York, London, Berlin, and Poland, with increasing opportunities for remote positions. Employment trends suggest continued growth, as the Labor Statistics projects a 13% increase in web developer roles from 2020 to 2030, reinforcing React’s long-term market relevance. The expansion of educational programs, certifications, and bootcamps further supports the growing workforce, ensuring a steady supply of skilled professionals in the field.

Ranking of top React development companies

In this blog post we like to create a subjective ranking of leading companies that offer React development services. Here is a list of the 8 companies we are going to cover:

• Dev and Deliver – JavaScript powerhouse
• TSH - Application development
• Blazity - Next and React development
• Phenomenon - Web development company
• Fively - Software developers

Dev and DeliverJAVASCRIPT POWERHOUSE SPECIALISING IN JS: REACT / NEXTJS / NODE / NEST

Dev And Deliver, established in 2013 under a different name, reinvented itself in 2017, evolving from a small sole proprietorship into a thriving limited company. Based in Cracow, Poland—often referred to as the tech capital of Central Europe—the company has quickly grown into a software house known for its deep expertise in JavaScript. Whether it’s React, React Native, Node.js, Next.js, or Nest.js, these are the tools Dev And Deliver specializes in, and they’re at the heart of everything they do. As the company continues to grow, their passion for JavaScript and cutting-edge technologies drives their success.

They build websites, mobile apps, and CRM platforms that are functional and user-friendly. Whether for startups or large enterprises, they turn concepts into practical solutions using modern, reliable technologies.

Their team operates out of Cracow, Poland but works with clients across the globe. No borders, no limits. Just solutions tailored to fit each project perfectly.

If you’re looking for innovation wrapped in expertise, Dev And Deliver is the partner that gets it done. Simple as that.

• Foundation Year: 2013
• Services: Web and mobile development, UI/UX design, DevOps and Cloud development, Generative AI development, Custom software development
• Specialisation: End to end service in JavaScript driven projects
• Minimum project size: $5,000
• Hourly rates: $35-$70/hr
• Industries: ESG, Gaming, Energy, Finance, Education / E-learning platforms, Fire and Safety, Healthcare
• Top clients: Mastercard, CapCom, Hemfrid, Gents, Novartis, GSK, Speeki
• Number of employees: 25-50

TSHAPPLICATIONS DEVELOPMENT

TSH is a software development company focused on React-based solutions. As a leader in web development, they help businesses streamline software processes and maximize the benefits of cloud technologies. Their team of expert engineers offers tailored services, including web and mobile app development, with an emphasis on building scalable, high-performance applications using React. TSH also provides cloud consulting, helping businesses navigate the complexities of cloud infrastructure and refine their digital strategies.

• Foundation Year: 2012
• Services: Custom Software Development, Web Development, Cloud Consulting & SI
• Specialisation: Cloud-Based Solutions, Software Development
• Minimum project size: $10,000+
• Hourly rates: $50-$99/hr
• Industries: Technology-first companies
• Top clients: eSky, Reservix, PetMediaGroup
• Number of employees: 300-400

BlazityREACT AND NEXT DEVELOPERS

Blazity specializes in Next.js and React development, offering services like headless implementations, eCommerce solutions, and consulting. They focus on creating high-quality, performant web platforms with excellent user experiences. Their expertise extends to migrating legacy systems to headless architectures and building custom solutions. They emphasize a partnership approach with clients, highlighting ownership, expertise, and reliability.

• Foundation Year: 2018
• Services: Next.js & React development, Migration to headless, Headless eCommerce, Consulting and workshops, Custom projects
• Minimum project size: $10,000+
• Hourly rates: $50-$99/hr
• Industries: eCommerce
• Top clients: Iberion, Dropsy, Speechmatics, Solana, Tom Tailor
• Number of employees: 10-49

PhenomenonWEB DEVELOPMENT FIRM

Phenomenon is a product design and development company with a focus on data-driven solutions for the SaaS, EdTech, FinTech, and Healthcare sectors. They provide a comprehensive range of services, including UI/UX design, web and mobile development, and branding. With a talented team of over 50 professionals, Phenomenon helps SMEs scale effectively while driving key business metrics forward. Their approach revolves around making user-centered decisions, promoting efficient scaling, and ensuring transparency throughout the process. By blending innovation with strategy, Phenomenon delivers solutions that make a real impact on growth and success.

• Foundation Year: 2019
• Services: UI/UX design, Web & mobile development, MVP creation, Presentation-ready concept, UX Audit & Discovery, Branding & Motion design
• Minimum project size: $10,000+
• Hourly rates: $25-$49/hr
• Industries: SaaS, EdTech, FinTech, and Healthcare
• Top clients: Assetario, Sway Finance, Medicare
• Number of employees: 50-249

FivelySOFTWARE DEVELOPERS

Fively, founded in 2018, is a team of 80+ full-stack software engineers specializing in software development for startups and SMEs, with key clients like SNAP and Zentist. They offer expertise, careful project estimation, and ongoing support, including project management, QA, and product design. Fively has collaborated with over 50 commercially successful startups and established companies across various industries, serving clients globally.

• Foundation Year: 2018
• Services: Full-stack software development, including project management, quality assurance, and product design services
• Minimum project size: $25,000+
• Hourly rates: $50-$99/hr
• Industries: FinTech, e-Commerce, HealthCare, BlockChain
• Top clients: SNAP, Zentist, Uniqkey, BloXmove, AviMedical, SwordFish
• Number of employees: 50-249

Why React is still the future and not going anywhere

React remains and will remain one of the most powerful and widely used libraries for building interactive user interfaces, and its dominance shows no signs of waning. With its component-based structure, developers can break down complex applications into smaller, reusable pieces, which makes development faster, more scalable, and far easier to maintain. This modular approach has made React the preferred choice for companies worldwide, from those specializing in product and app development to those in the AI space. Its ability to seamlessly integrate with a range of other technologies ensures it meets diverse project needs—whether it’s web apps, mobile applications, or anything in between.

What really sets React apart is its vibrant developer community. The framework is backed by one of the largest ecosystems, constantly evolving with improvements and a wealth of resources—from open-source libraries to comprehensive documentation. This active community keeps React at the forefront of the latest web technologies, ensuring it remains relevant. React’s ongoing evolution, such as the introduction of React Server Components and performance-boosting features like the Virtual DOM, makes it a future-proof solution. As more businesses, from startups to large enterprises, embrace React, the demand for skilled developers grows, cementing React’s place as a go-to tool in web and mobile development for years to come.

WHAT SETS POLISH DEVELOPERS APART WHEN IT COMES TO INNOVATION AND DELIVERING REAL-WORLD SOLUTIONS?

We asked Piotr Żarów, CEO of Dev and Deliver this question and he responded: “Polish developers don’t just follow trends—we shape them. We are focused on coding; we focus on creating solutions that solve [...] business problems. We always think about how to make apps work better, faster and more efficiently. We are super pragmatic, thinking about your business first. [...] And when it comes to React, we don’t JUST use it—we push the boundaries to help your business grow."