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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.
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
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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 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 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 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
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
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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 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 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 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
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
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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
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
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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 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
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 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 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 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:Â
React.js consulting: Guiding businesses on building and optimizing their React applications through component selection, architecture design, and roadmap development.Â
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. Â
UI/UX design: Delivering intuitive interfaces, clear user flows, and standardized design systems that align with a brand and its target users.Â
API integration: Connecting the React frontend to back-end systems, third-party tools, and external data sources to support seamless functionality and user experiences.Â
Platform migration: Rebuilding or migrating legacy frontends to React to improve maintainability, usability, and performance, often with minimal disruption.Â
Maintenance and support: Providing post-launch monitoring, debugging, performance optimization, and technical support.Â
Many React.js developers also offer specialized expertise, including SaaS products, web application development, customer portals, eCommerce solutions, and minimum viable products (MVPs). Â
Some React.js development companies may also offer digital marketing services, such as content marketing, search engine optimization (SEO), and branding.Â
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:Â
Â
React
React Native
Primary platforms
Websites, web applications, and single-page applications
iOS and Android mobile apps
Tech base
JavaScript/TypeScript with React for web UI
JavaScript/TypeScript with React, rendered through native UI components
Best for
Businesses building browser-based products, customer portals, dashboards, eCommerce sites, and SEO-focused web experiences
Businesses building cross-platform mobile apps for both iOS and Android with shared logic and accelerated development time
Examples
Facebook, Instagram, Netflix web
Microsoft 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.Â
Databases and infrastructure: PostgreSQL, SQL Server, RedisÂ
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. Â
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.Â
These companies can help you build features such as:Â
Personalized content and recommendations based on user behaviorÂ
Chatbots and virtual assistants for real-time customer supportÂ
Smart search with autocomplete, semantic search, and related-result suggestionsÂ
AI-assisted dashboards that generate summaries, reports, forecasts, and insights from business dataÂ
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:Â
You have a short-term or time-sensitive project, but your internal team is already at capacity.Â
You do not have the specialized expertise required for the project, such as React architecture, performance optimization, migration, or AI feature integration.Â
You need to accelerate delivery without hiring and onboarding a full internal team.Â
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.Â
You need temporary support to fill skill gaps or expand delivery capacity.Â
Use an in-house team when:Â
The application is a core business product that requires long-term ownership and deep institutional knowledge.Â
The project involves highly sensitive systems, proprietary logic, or strict security and compliance requirements.Â
You need close day-to-day collaboration, faster internal feedback loops, and direct control over priorities.Â
The product requires continuous iteration and alignment with multiple internal teams over time.Â