React.js is an efficient, declarative, and flexible open-source JavaScript library that is useful for developing user interfaces specially for single page apps. With React.js, users can build complex user interfaces from “components.” Components are small and isolated pieces of code.

React.js can also be used as a base in the building of both mobile and single-page apps. Although, complex React.js apps usually require additional libraries for interaction, routing, and state management with an API (Application programming interface).

React.js makes it possible for developers to design large web apps which can change data, without reloading the page.

From 266,988 reviews, clients rate our React.js Developers 4.84 out of 5 stars.
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    Simple fix for ReactJS App 6 days left
    VERIFIED

    We are looking for someone with experience in ReactJS to add one simple line of code which will disable our option "Razorback Maxfire" when the option "eSports > Paddles" is selected. Here is the webpage created in ReactJS: We will also provide access to GitHub where you can find the source project files.

    $17 (Avg Bid)
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    I have a nodejs/reactjs app that was built few years back. I had a Google Sign-in feature set up in my website which has stopped working now. It throws an error now, which I need to fix it out. It throws this error: Error 400: redirect_uri_mismatch I know it is a simple fix for someone who knows how this works. Apply only if you are available to fix this out now. Budget: 10 USD

    $10 / hr (Avg Bid)
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    I have a Vue.js version of project. I want convert it into React.js.

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    We have mock json responses and would like someone to create mock endpoints through and parse response into front-end .Lets chat Timeline: 1-2 Hours Let's chat

    $1 - $5 / hr
    Sealed
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    12 bids

    Text generator using form input sent to API. Use APIs. Frontend and backend. using OpenAI - Webapp pages: login, user account creation, usage, billing, main form - Users to authenticate and process billing /subscription - CSV upload for basic parsing, CSV download of form completion - Form completions stored and viewable - Will need to use APIs. Keys provided. APIs already selected.

    $463 (Avg Bid)
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    131 bids

    Facing an issue with the front-end web pages which was developed in react and fix some bugs, details will be provided in the interview.

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    We have a nodejs api which contain the data of graph you hva eto integerate in ReactJs. Charts are made using chart.js. If you are able to integerate these 5 graphs will give full project. NCR Person will be preferrable

    $292 (Avg Bid)
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    I need to develop a platform that will create post using openai and post them to wordpress and sicial media post. It should be able to schedule also. I will share all features on the discussion.

    $539 (Avg Bid)
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    highly expert of docker with node developer needed to work on a taxi applications of this

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    API integrations and high critical bugs on bad response and loader template

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    We need an expert React/React Native developer to help in fixing of issues in the existing app.

    $288 (Avg Bid)
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    44 bids

    We are a financial service-based company, and we need an experienced developer/team in GO to work on complex tasks. Our requirements: 1) Highly experienced in GO, JavaScript programing languages, 2) Highly experienced in MySQL / PostgreSQL (Aurora Databases), 3) Highly experienced ReactJS, 4) Experience in business processes. (The projects that the developer will work will be about business processes like purchases, sales, inventory etc.) 5) Experience with AWS services like Lambda, Cognito, Api-gateway, Code commit, ci/cd etc. 6) Strong problem-solving skills and understanding of the key issues in projects. 7) Other important skills The developer will work on our AWS environment and will have all the right tools, documentation, logic, and support to complete the project. To check furth...

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    Building a component have to do pair-programming.

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    We are a startup building a product and looking for a full stack developer - .net core backend, react.js with typescript frontend. As a first project and to decide if you will be our developer for the long run, we want you to create a settings page for our product. see attached screen shots for what you need to develop. the product is in the infrastructure/storage management, so for the settings page you would need: 1. build the UI of the page 2. allow to add infrastructure/storage 3. send the when adding/updating/deleting send it to a .net core backend (use CQRS method and separate select and updates) and save in postgresql db

    $19 / hr (Avg Bid)
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    Looking for Software Developers with expertise on below: Front-End: -React + Bootstrap, experience with NextJS Back-End: -Experienced in microservice based architecture -Asynchronous messaging models (RabbitMQ or Kafka) -NestJS, MySQL, RabbitMQ

    $21 / hr (Avg Bid)
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    We have an existing analytics website that has 10-20 different pages that are all analytics driven. We have a ReactJs + TypeScript front end that was built using Create React App (no WebPack etc, no redux). We use a GCP FastAPI backend with BigQuery and Firebase as data bases. Front End talks to the BigQuery based backend for analytics data, does some complex operations on the frontend itself (like filters) and shows the data on the screen. We are having issues with extremely slow load times (15-20 seconds) on several pages, constant hanging etc. We need help with the following 1. Identify bottlenecks, understand context of the metrics, a. come up with suggestions to change the backend API contract if it is a backend b. improve the performance on the front end if it is a purely front end i...

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    Hi, I already have a website which is made with Bootstrap and Laravel for backend, We tried to go with new version and already had made the front end with react JS and we are actively looking for backend Laravel framework developers or we are okay to go with Node Js too. This version of our project includes Lead Gen for users and management from backend, Need to create API calls and integrate Mailing / SMS notications and other things which makes the process automation. Also Payment Gateway Integration needed to integrated. Also User dashboard and Admin dashboards needed to be done. Coming for the Front end, Pages needed to be created for some. The Landing page is ready and other services pages too are ready. Our project is a real-estate start-up. we are looking for Vizag based developers...

    $325 (Avg Bid)
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    project in blockchain 6 days left
    VERIFIED

    need to choose one of the option first one: Development of multicurrency (2 different coins is enough) HD wallet, allowing a set of standard wallet operations (create/restore account, check balances, send signed transactions). a. Implementation – HTML, JS. b. Must use shared nodes (recommended API - ) ******* Second option: Development of system for elections, based on ETH smart contracts a. Implementation – Solidity, HTML, JS b. Deployment – ETH Ropsten

    $484 (Avg Bid)
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    25 bids

    We are looking for freelance expert who can work an a specific set of agenda to explain and deliver it's outcomes

    $533 (Avg Bid)
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    18 bids
    need MERN Stack Developer 6 days left
    VERIFIED

    Need MERN Developer, He should extend my MERN Applikation

    $147 (Avg Bid)
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    85 bids
    MERN DEVELOPER - 6 days left
    VERIFIED

    There is an app in which registration is being done with the district and city. You have to enter state instead of district and district instead of city. 1. This app is connected with mongodb. 3. This data has to be connected like this (check in video link:) --> 4. As the district and city are working in this video and in the same way the two new fields that will be created will also work like this. STATE--> DISTRICT Technology used : FRONTEND : react.js, BACKEND : , DATABASE : mongodb

    $25 (Avg Bid)
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    We need a react JS/Next JS - PWA developer for a common code application.

    $6 / hr (Avg Bid)
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    30 bids

    i have a crm software, want to add an additional features in the software.

    $3 / hr (Avg Bid)
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    ReactJs. Reactnative, expo 5 days left
    VERIFIED

    I need a developer for taxi Booking App, jiske expo, reactnative, reactjs aati ho, accha experience wala developer chaiye

    $218 (Avg Bid)
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    18 bids

    Job Description : Develop reusable patterns, practices, and reference architectures through research, Proof of Concept builds and collaborations with Innovation and engineering teams. Provide consultation to teams on the tactical application of reference architectures and the strategic direction of enterprise technology. Interact with executive level leadership from business and technology. Communicate roadmaps towards the delivery of highly complex solutions. Communicate technology strategy to leaders and knowledge workers via roadmaps, conceptual diagrams and solution documents. Hold collaborative meetings with technologists and business people to identify opportunities for innovation. Using independent research and analysis of industry and technology trends, provide actionable ideas ...

    $20 / hr (Avg Bid)
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    Work Time: 8Am - 5Pm (GMT) We are looking for a React developer who is proficient in React.js & Node (Preferable). Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities: - Developing new user-facing features using React.js - Building reusable components and front-end libraries for future use - Translating designs and wireframes into high quality code - Optimizing ...

    $8 / hr (Avg Bid)
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    We are looking for someone who can help us in extending the functionality of the tool. Ideal candidate should have Flask and React experience . Past Superset experience will be an advantage.

    $566 (Avg Bid)
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    i want a react a native developer of an native app .

    $5 / hr (Avg Bid)
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    28 bids

    I need a python developer to help us integration of web hook in our application.

    $85 (Avg Bid)
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    15 bids

    I am looking to get done with a basic webapp (essentially 4 webforms) in ReactJs/material UI. Backend APIs will be provided. Please check pdf for exact spec.

    $130 (Avg Bid)
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    80 bids

    I want someone who can build website for my Saas product which should very detailed and user friendly. Something which is very similar to bigpanda and moogsoft websites. Who also can do good logo designing for my product

    $118 (Avg Bid)
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    74 bids

    Work Time: 8Am - 5Pm (GMT) We are looking for a React developer who is proficient in React.js & Node (Preferable). Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities: - Developing new user-facing features using React.js - Building reusable components and front-end libraries for future use - Translating designs and wireframes into high quality code - Optimizing ...

    $8 / hr (Avg Bid)
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    85 bids

    We are seeking a highly skilled and experienced Web Developer/Programmer to build a web-based platform for a database service. The ideal candidate will have a strong background in web development and programming, with a particular focus on building scalable and secure applications. Responsibilities: Design, develop, and maintain a web-based platform for a database service using Google Firebase. Work closely with stakeholders to gather requirements and ensure the platform meets their needs. Write clean, maintainable, and scalable code using JavaScript, HTML, CSS, and other relevant technologies. Implement data entry forms and user authentication features to allow users to enter and manage their data securely. Ensure that the platform is highly secure and protected against potential se...

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    51 bids

    API integrations and high critical bugs using React, postman API, Typescript, html, JS and SCSS

    $14 (Avg Bid)
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    21 bids

    Work Time: 8Am - 5Pm (GMT) We are looking for a React developer who is proficient in React.js & Node (Preferable). Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities: - Developing new user-facing features using React.js - Building reusable components and front-end libraries for future use - Translating designs and wireframes into high quality code - Optimizing ...

    $8 / hr (Avg Bid)
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    i want mobile and website for real estate agent i want agents can login and sharing profile and and posts and every agent have own dashboard and every agent have own profile link ______________________________________________________________________________ node js react js next js amazing UI & UX flutter mango db

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    180 bids

    Hello, I am looking for a long term freelancer who is specialized in React, JavaScript and Node.js. TypeScript is a plus. And you should be avaliable to work at least 6 hours per day. Thank you for reading my project description, and I will provide more in detail. Best regards.

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    Hi Developers. Have a nice weekend. I am going to build simple React Social API has login functionality. If you are an expert in this field, contact me today Thank you

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    Our team is looking for a full stack engineer to help us build the future of learning! TIL () is a live social platform where passionate people go to get inspired, learn, and create. Creators use TIL to teach live interactive courses and build communities. We're looking for a product engineer who can own features end to end. We have a modern tech stack and care deeply about developer experience: - , deployed on Vercel - React - Typescript - Tailwind CSS - TRPC for data fetching - Prisma - Planetscale If you're familiar with the Create T3 Turbo stack, you'll feel write at home in our repo: We have a bunch of projects ready for someone who can jump in and start coding. You'll be given Figma designs, a technical specification, and staging data so you can start right aw...

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    This project is to create UI Components using Nativebase library using a PNG File as the mock up. The Nativebase library will be used on regular Create React App Web project. The UI Components should be response and should not use any HTML. Only Nativebase components are allowed. The project is for for 10 screens. Sample screen will be provided on request.

    $467 (Avg Bid)
    NDA
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    We are looking for full stack web developer having relevant experience in React, Django and SQL.

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    The aim is to develop a website that is similar to freelancer.com. The website will have two arms, one for professionals and the other for non-professionals. Service providers can also be service recipients. Expected technology: Django for the backend and React.js for the frontend

    $2877 (Avg Bid)
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    I have a lottery contract where everything works ok except the part that when someone wins and withdraws the amount of the winning, that value never gets reset. This is the code: const handleWithdrawWinnings = async () => { const notification = ('Withdrawing your winnings...'); tokenPayment([lastWinner, BigInt(winnings * (10 ** undoDecimal / 100))], { onSuccess: async () => { try { await withdrawWinnings([ tokenAddress, lastWinner, winnings, {gasLimit: "1000000"} ], ); ('Winnings withdrawn successfully!', { id: notification }); } catch (error) { ('Whoops! something went wrong!', { id: notification ...

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    There is an app in which registration is being done with the district and city. You have to enter state instead of district and district instead of city. And two new fields are also to be created Tehsil and Village. I will give you Indian State,District,Tehsil,Village file which you need to store in db and it will work like this: video link 1. You have to add 2 fields in React frontend code 2. This app is connected with mongodb. You have to store data in it only 3. This data has to be connected like this (check in video link:) --> 4. As the district and city are working in this video and in the same way the two new fields that will be created will also work like this. STATE--> DISTRICT--> TEHSIL --> VILLAGE Technology used : FRONTEND : react.js, BACKEND : , DATABASE : mongo...

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    YOUR BID PRICE IS FINAL## NO LATER CHANGE IS ALLOWED## I DON'T DEAL OUTSIDE FREELANCER## PLEASE WATCH THE ATTACHED VIDEO FIRST I need an experienced programmer who can build me an interactive worksheet system where users can register/login and then can upload files of docx, PDF, JPEG, PNG system to make interactive worksheets as per the attached video. Features like adding image, short answer/long answer box/drop down/radio/adding image, hyperlink, audio, video, comments in particular place, preview etc to be there. It should also have auto-checking and scoring system and sharing in Soc ial media system as well as email sending system and should be able to embed worksheet as iframe. Each worksheet created should have unique URL for sharing. I need full source code, co pyr i g ht and i...

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    The React Native App is 90% done, some navigation issues need to be fixed. We use Context to manage user info. Render sidebar dynamically according to whether user is logged in or not. To handle this task successfully, you need to have good knowledge of React Navigation: No code can be sent to you. You have to work remotely with me via 【TeamViewer】.

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    I want someone to build a website for my fashion design company in react js framework

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    I have bugs in my react app and want to host it freely. Urgent need: To be completed by Tonight or Morning 9 am tomorrow

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    We have workflow for our MVP. We are looking for a talent who can work from UI design to development. Our reference website (good design I think) is

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    We're looking for an experienced MERN stack developer to join our team as a freelancer and contribute to the development of a cutting-edge booking application. The successful candidate will have a passion for delivering high-quality software solutions and the ability to work independently to achieve project goals. Responsibilities: Participate in the design and development of a booking application based on the MERN stack Write clean, maintainable, and efficient code Collaborate with the project team to deliver high-quality software solutions that meet client needs Ensure that all project deliverables are completed on time and to a high standard Requirements: Strong experience with the MERN stack (MongoDB, ExpressJS, ReactJS, NodeJS) Excellent problem-solvin...

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