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Discover the top React.js Development Companies for Your Project

5 Companies-Rankings updated: September 03, 2026

DesignRush evaluates all React.js developers listed based on their technical expertise, past work, and client reviews. Some listings may be paid.

React.JS
React.JS × HR × $50,000 & Up ×Clear Filters
  • Product, engineering, and AI partner for high-growth companies.

    OAK'S LAB is a product, engineering, and AI partner for high-growth companies, not a generic dev shop. We embed alongside product teams to design, build, and scale production software, with deep experience in regulated industries: finance, healthcare, cybersecurity, and education...

    Top Services:

    • Software Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • AI Development
    • Show more
    Location
    Prague, Czech Republic
    Number of Employees
    50 - 99
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    7 Projects Listed

    OAK'S LAB Services

    • Software Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • AI Development
    • Web Design
    • Software Testing
    • Digital Services
    • Branding
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • NASDAQ Private Market
    • PlexTrac
    • Vette
    • Crave
    • Capital Markets Gateway
    • Karus
    • Plotify
    • Storyvine
    • West Tenth
    • Dot Residential
    Data sourced from the agency's DesignRush profile

    OAK'S LAB Reviews & Testimonials

    • Aydar Ageev
      Aydar Ageev Review from Google
      5.0

      Aydar Ageev's Review Sourced from Google

      It's probably a wonderful feeling to go to work, being able to feel the tourist hustle and hear the sound of the clock from the Old Town Square.

    • Aleksandar Chernev
      Aleksandar Chernev Review from Google
      5.0

      Aleksandar Chernev's Review Sourced from Google

      Such an awesome event. It was so well organized and I was so pleased to meet Oak’s Lab awesome team.

    • Adam Mazouz
      Adam Mazouz Review from Google
      5.0

      Adam Mazouz's Review Sourced from Google

      This was one of the best meetups of the year for me. The ambiance, the vitality, and the community they brought together. P.S: The office location is winning big times.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Outcome focused Mobile and XR app development.

    A mobile and AR/VR product studio with an outcome-driven mindset and smart delivery...

    Top Services:

    • Mobile App Development
    • VR/AR
    • IT Services
    • Product Design
    • UI/UX Design
    • Show more
    Location
    Wroclaw, Poland
    Number of Employees
    50 - 99
    Average Hourly Rate
    $80/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    20 Projects Listed

    nomtek Services

    • Mobile App Development
    • VR/AR
    • IT Services
    • Product Design
    • UI/UX Design
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • PONS
    • VirtaMed
    • Monster
    • Jägermeister
    • Magic Leap
    • Lighticians
    • Unicity
    • AREA15
    • Siemens Healthineers
    Data sourced from the agency's DesignRush profile

    nomtek Reviews & Testimonials

    • Roland Siegenthaler
      Roland Siegenthaler Review from Google
      5.0

      Roland Siegenthaler's Review Sourced from Google

      They are really nice people, with great skill and they not only talk but actually live the agile approach. Within three days they delivered a first prototype of my app - absolutely amazing!

    • tamara bolsewicz
      tamara bolsewicz Review from Google
      5.0

      tamara bolsewicz's Review Sourced from Google

      Best employer ever! After over 2 years and 2 different workplaces I'v decided to come back, as nothing compares to nomtek :)

    • Fenton Hughes
      Fenton Hughes Review from Google
      5.0

      Fenton Hughes's Review Sourced from Google

      We've been working on an app development project with Nomtek since Feb. So far our collaboration has been very good. They are client-focused, reliable, and competent.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • We Turn Ideas Into Awesome Software Products!

    Codequest is an AI-driven software studio based in Warsaw, Poland. Founded in 2009, were a small, focused team of engineers, designers, and data scientists who create fast, functional, and beautiful digital products driven by cutting-edge technology and a commitment to user-centric design...

    Top Services:

    • Web Development
    • Mobile App Development
    • AI Development
    • Product Design
    • Software Development
    • Show more
    Location
    Warsaw, Poland
    Number of Employees
    Under 49
    Average Hourly Rate
    $65/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    5 Projects Listed

    Codequest Services

    • Web Development
    • Mobile App Development
    • AI Development
    • Product Design
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Glassdoor
    • Weight Watchers
    • Foundersuite
    • Delio
    • Jush
    • Booli App
    • SelectHub
    • Lite e-Commerce
    • DaWanda
    Data sourced from the agency's DesignRush profile

    Codequest Reviews & Testimonials

    • Juliana Slaghenauf
      Juliana Slaghenauf Review from Google
      1.0

      Juliana Slaghenauf's Review Sourced from Google

      Assinei o Premium achando que assina recibo digitalmente, mas não, apenas receitas Memed. Enviei msgs para o help e todos os ctts que indicam, sem respostas. Solicitei cancelamento hj, dia 02/09, com reembolso pro rata, e até o momento, sem qlq resposta, não tem suporte 24h!! Não recomendo. Software Consultório.Me.

    • Jakub Komorowski
      Jakub Komorowski Review from Google
      5.0

      Jakub Komorowski's Review Sourced from Google

      As an employee, I recommend it as a place to work - good atmosphere in the team, transparent company management and good salaries.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Disruptive Technologies Software House

    Our long-term goal is to become the most effective software company in the world...

    Top Services:

    • Software Development
    • Product Design
    • UI/UX Design
    • Web Design
    • Blockchain
    • Show more
    Location
    Krakow, Poland
    Number of Employees
    50 - 99
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    2 Projects Listed

    Pragmatic Coders Services

    • Software Development
    • Product Design
    • UI/UX Design
    • Web Design
    • Blockchain
    • Mobile App Development
    • AI Development
    • VR/AR
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • WebInterpret
    • AccentPharm
    • PhotoChain
    • Eldorado
    • EXCC
    • DiscoverCracow
    • Kitopi
    • Common Wealth
    • Atom Bank
    Data sourced from the agency's DesignRush profile

    Pragmatic Coders Reviews & Testimonials

    • Patryk DÄ…browski
      Patryk DÄ…browski Review from Google
      5.0

      Patryk DÄ…browski's Review Sourced from Google

      Great contact with the Pragmatic Coders team. Even though they weren't able to participate in the project, I received very specific and helpful feedback from Wojtek, which really pushed my idea forward. Their professional and friendly approach – I highly recommend them.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Experts in everything mobile

    Apadmi designs, develops and optimises mobile apps for leading brands. We unlock new value through strategy, platforms, middleware and systems integrations that transform the way they work...

    Top Services:

    • Mobile App Development
    • UI/UX Design
    • Web Development
    • Software Testing
    • Blockchain
    • Show more
    Location
    Manchester, United Kingdom
    Number of Employees
    250 - 499
    Average Hourly Rate
    $200/hr
    Minimal Budget
    $50,000 & Up

    Apadmi Services

    • Mobile App Development
    • UI/UX Design
    • Web Development
    • Software Testing
    • Blockchain
    • Software Development
    • CRM Consulting
    • Managed Services
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Co-op
    • Domino's Pizza UK and Ireland
    • The Guardian
    • United Utilities
    • HSS
    • NHS
    • SailGP
    • Argos
    • Charles Stanley
    • BBC
    Data sourced from the agency's DesignRush profile

    Apadmi Reviews & Testimonials

    • Thomas Booth
      Thomas Booth Review from Google
      2.0

      Thomas Booth's Review Sourced from Google

      I recently had an experience back in 2022 with Apadmi that I feel compelled to share and have debated whether i should post this. As a professional eagerly looking forward to an interview with Apadmi, I was unfortunately met with a series of disappointments.Firstly, the structured process I was initially promised for the interview was not adhered to. This lack of organisation not only threw me off but also made it challenging to present myself effectively and forced to do a presentation in less than 24 hours notice.More concerning, however, was my interaction with the Managing Director, not sure if he is still there. I found his demeanour not just unprofessional but outright rude. This was disheartening, especially coming from a leadership figure in a reputable company. I've actually never been so humiliated in the professional environment.It's important for companies to remember that interviews are a two-way process. They are not just about evaluating candidates, but also about demonstrating the company's values and culture. Unfortunately, my experience with Apadmi fell short of the professional standards one would expect, however i would say Marcus, one of the board members was a delight in my first stage.I hope my feedback is taken constructively, as it is intended to highlight areas where there is significant room for improvement in how Apadmi manages its recruitment process and senior staff interactions.

    • Steve Jackson
      Steve Jackson Review from Google
      5.0

      Steve Jackson's Review Sourced from Google

      Fantastic team, you can rely on them always.. Robert a partner of Apadami is an exceptional individual who supported me with my project in a professional manner. With his excellent peoples skills he will look after you. The person you can rely on anything and keep you assured. Will always go back to Apadami.

    • Manoj Ranaweera
      Manoj Ranaweera Review from Google
      5.0

      Manoj Ranaweera's Review Sourced from Google

      Apadmi's ability to spin out technology as separate companies is remarkable. A strong supporter of Manchester tech ecosystem, they became unbeatable in mobile category during the first three years of northern tech awards before it adopted a new structure and ownership. Another remarkable achievement is that the four founders have remained together during all these years. I wish them all the best.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

Frequently Asked Questions About React.js Developers

What are the typical React.js development services?

React.js development companies provide end-to-end services that span the entire software development lifecycle, from strategy and design to development and launch. Core services include: 

  • React.js consulting: Guiding businesses on building and optimizing their React applications through component selection, architecture design, and roadmap development. 
  • Custom React.js development: Engineering applications tailored to a business's specific needs, goals, and existing IT infrastructure, and typically include web design and web development.  
  • UI/UX design: Delivering intuitive interfaces, clear user flows, and standardized design systems that align with a brand and its target users. 
  • API integration: Connecting the React frontend to back-end systems, third-party tools, and external data sources to support seamless functionality and user experiences. 
  • Platform migration: Rebuilding or migrating legacy frontends to React to improve maintainability, usability, and performance, often with minimal disruption. 
  • Maintenance and support: Providing post-launch monitoring, debugging, performance optimization, and technical support. 

Many React.js developers also offer specialized expertise, including SaaS products, web application development, customer portals, eCommerce solutions, and minimum viable products (MVPs).  

Some React.js development companies may also offer digital marketing services, such as content marketing, search engine optimization (SEO), and branding. 

What is the difference between React and React Native?

The main difference is that React is used to build web user interfaces, while React Native is for developing mobile applications. Here are more details on their differences: 

 ReactReact Native
Primary platformsWebsites, web applications, and single-page applicationsiOS and Android mobile apps
Tech baseJavaScript/TypeScript with React for web UIJavaScript/TypeScript with React, rendered through native UI components
Best forBusinesses building browser-based products, customer portals, dashboards, eCommerce sites, and SEO-focused web experiencesBusinesses building cross-platform mobile apps for both iOS and Android with shared logic and accelerated development time
ExamplesFacebook, Instagram, Netflix webMicrosoft Teams and Shopify

What are the typical React developer tools?

React.js developers typically choose their stack based on a client's product goals, technical requirements, and existing systems. For example, they may use Formik for complex forms and validation, Storybook for developing and testing components in isolation, and MUI for production-ready UI components and design systems. 

Common React developer tools: 

  • Core front-end: React, JavaScript, TypeScript, HTML, CSS 
  • State and data fetching: Redux, TanStack Query 
  • UI and styling: Tailwind CSS, MUI, Storybook 
  • Testing: Jest, React Testing Library, Cypress 
  • Back-end options: Express, Laravel, Rails, ASP.NET 
  • Databases and infrastructure: PostgreSQL, SQL Server, Redis 

Can React.js developers build AI-powered features into web applications?

Yes. A React.js developer can build AI-powered features into a web application by integrating model APIs, SDKs, and AI workflows into the product experience.   

Depending on your goals, this may include providers such as Google Gemini or Anthropic Claude, along with React developer tools, like Vercel's AI SDK for building chat, search, recommendation, and automation experiences in React-based apps. 

These companies can help you build features such as: 

  • Personalized content and recommendations based on user behavior 
  • Chatbots and virtual assistants for real-time customer support 
  • Smart search with autocomplete, semantic search, and related-result suggestions 
  • AI-assisted dashboards that generate summaries, reports, forecasts, and insights from business data 

When should you hire a React.js development company instead of using an in-house team?

The right choice depends on your project goals, internal capacity, timeline, and need for control. You may want to hire a React.js development company if: 

  • You have a short-term or time-sensitive project, but your internal team is already at capacity. 
  • You do not have the specialized expertise required for the project, such as React architecture, performance optimization, migration, or AI feature integration. 
  • You need to accelerate delivery without hiring and onboarding a full internal team. 
  • You want access to a broader range of skills, such as design, front-end engineering, QA, and post-launch support, through a single external partner. 
  • You need temporary support to fill skill gaps or expand delivery capacity. 

Use an in-house team when: 

  • The application is a core business product that requires long-term ownership and deep institutional knowledge. 
  • The project involves highly sensitive systems, proprietary logic, or strict security and compliance requirements. 
  • You need close day-to-day collaboration, faster internal feedback loops, and direct control over priorities. 
  • The product requires continuous iteration and alignment with multiple internal teams over time. 

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