JavaScript is one of the most popular programming languages in the world. If you are looking for a website to be created with sophisticated interactivity or in search of an impressive mobile app, using JavaScript is the way to go. With the help of our expert Javascript Developers, you can bring your idea to life.

A Javascript developer on Freelancer.com can create dynamic web applications with extended features and improved user experiences. They can also design advanced gaming applications, develop cloud applications, and create powerful websites that work with less coding and low complexity.

Here's some projects that our expert Javascript Developers made real:

  • Developed interactive websites & apps with detailed user accounts experience
  • Created powerful applications that streamline complex data into actionable insights
  • Built custom Windows and Mac software designed to fit client specifications
  • Developed mobile apps that enables customers to access data from their phones
  • Connected databases to web interfaces with easy input/output functionality
  • Optimized existing code for faster loading pages and smoother user workflows

Javascript Developers on Freelancer.com know how to turn ideas into reality. They are experienced professionals dedicated to excellence and creating top-notch scripts that are easy to use, reliable and fast. If you have an idea but don’t know how to turn it into technical reality, Freelancer.com is the place to post your project. Hire our expert Javascript developers today!

De 695,336 opiniones, los clientes califican nuestro Javascript Developers 4.87 de un total de 5 estrellas.
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    716 trabajados encontrados, precios en EUR

    Se requiere persona con experiencia en la elaboración de juegos educativos para Colegios. Se envía algunos ejemplos de juegos educativos: . . . .

    €125 (Avg Bid)
    €125 Oferta promedio
    7 ofertas

    este es el sitio web de ejemplo , quiero hacer uno igual tiene las siguientes características Registro de usuarios: Permite a los usuarios crear una cuenta en tu sitio web para acceder a todas las funciones y publicar anuncios. Inicio de sesión: Proporciona a los usuarios registrados la posibilidad de iniciar sesión en sus cuentas con nombre de usuario y contraseña. Publicación de anuncios: Permite a los usuarios crear y publicar anuncios de productos o servicios que desean vender, incluyendo detalles como título, descripción, categoría, precio, ubicación, imágenes, etc. Búsqueda avanzada: Implementa un sistema de búsqueda avanzada que permita a los usuarios buscar anuncios por categoría, ubicac...

    €2015 (Avg Bid)
    €2015 Oferta promedio
    34 ofertas

    Necesitamos implementar facturación electrónica ante la DIAN Colombia a un sistema POS que esta realizado en php.

    €164 (Avg Bid)
    €164 Oferta promedio
    28 ofertas

    Tenemos una serie de robots RPA ejecutándose en el entorno de nuestros clientes y un panel web desarrollado con Codeigniter, php, html y javascript. Necesitamos mostrar los reportes generados actualmente en excel por los robots, en el panel web para que nuestros clientes puedan hacer seguimiento y minimizar la manera en que se transmiten actualmente (emails + excel adjunto).

    €15 / hr (Avg Bid)
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    33 ofertas

    Crear un software muy simple y completamente igual a una muestra que doy

    €143 (Avg Bid)
    €143 Oferta promedio
    16 ofertas
    Frontend Angular 5 días left
    VERIFICADO

    Especialista en dashboard Se requiere desarrollador frontend con experiencia en lenguaje Angular JS, Para proyecto de refactorizacion y desarrollo de algunas opciones, persona con experiencia comprobable y de concretar proyecto de 60 a 90 días con entregables de 50% y 50% se requiere una persona que cuente con conocimientos de api de consumo y conexión de socket, es importante contar con trabajos concluidos. Solo personas con idioma en español.

    €252 (Avg Bid)
    €252 Oferta promedio
    22 ofertas
    Web React desing game 5 días left
    VERIFICADO

    Necesito una web el cual pueda utilizar junto la conexion web3, necesito que tenga las siguientes caracteristicas: API para interactuar con smart contracts. API para leer y enviar informacion de/a la blockchain. Opcion de Login con correo electronico y wallet. Dashboard con parametros de historial de transaccion, coleccion de articulos, listado de productos en ventas. Foro con permisos de post con wallet conectada. ---------Diseño de la web---------- Responsive. Ambientado en un juego entre moderno y mediaval. Scroll realista. Animaciones de botones, imagenes, paneles y dashborad. Logo con animacion. Pantalla de carga de loading con formato del logo, con diselo que se va rellenando el logo a medida que va cargando la web.

    €245 (Avg Bid)
    €245 Oferta promedio
    33 ofertas

    Hola! Me interesa crear un plug-in de Wordpress Que se conecte a nuestra API del sistema de reservaciones multiempresa (ejemplo: ). Desplegar en su página de Wordpress nuestro motor realizado en ASP.Net.

    €512 (Avg Bid)
    €512 Oferta promedio
    38 ofertas
    Proyecto de Desarrollo en Ángular 4 días left
    VERIFICADO

    Tenemos un proyecto de aproximadamente un mes y medio para BackEnd y FrontEnd en Angular. Necesitamos que sepan reutilización de componentes, código limpio ddd, deseable solid.

    €11 / hr (Avg Bid)
    €11 / hr Oferta promedio
    55 ofertas
    Proceso politico 4 días left
    VERIFICADO

    Se pretende desarrollar una plataforma para llevar el control de votantes, lideres y demas de campañas politicas. se pretende tener formularios con georeferenciacion y modulo estadistico.

    €1953 (Avg Bid)
    €1953 Oferta promedio
    74 ofertas

    El objetivo: tomar automáticamente capturas de pantalla de páginas web, convertir el formato de archivo y resaltar áreas específicas de las imágenes. El código debe estar SECO y estar escrito en módulos autónomos. Qué le podemos ofrecer -------------------------- 1. Oportunidades para trabajar con clientes externos famosos (p. ej., Disney, Ernst & Young, Credit Suisse) Puede elegir el contrato que funcione para usted sin política, estrés o drama. Gestionamos todo eso por ti. 2. Múltiples oportunidades de proyectos internos Conviértase en nuestro proveedor preferido a largo plazo. Le ofrecemos proyectos que coinciden con su conjunto de habilidades e intereses. 3. Gran ambiente de trabajo Sea b...

    €162 (Avg Bid)
    €162 Oferta promedio
    16 ofertas

    Qué le podemos ofrecer -------------------------- 1. Oportunidades para trabajar con clientes externos famosos (p. ej., Disney, Ernst & Young, Credit Suisse) Puede elegir el contrato que funcione para usted sin política, estrés o drama. Gestionamos todo eso por ti. 2. Múltiples oportunidades de proyectos internos Conviértase en nuestro proveedor preferido a largo plazo. Le ofrecemos proyectos que coinciden con su conjunto de habilidades e intereses. 3. Gran ambiente de trabajo Sea bienvenido a nuestro entorno familiar, feliz, solidario y servicial (lea nuestras reseñas de Upwork) . 4. ¡Bonos! Valoramos a las grandes personas. Premiamos financieramente a las personas por su confianza, lealtad, calidad de trabajo y proactividad a trav...

    €121 (Avg Bid)
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    23 ofertas

    Busco programador junior que pueda apoyarme con desarrollo en vue react y express

    €7 / hr (Avg Bid)
    €7 / hr Oferta promedio
    44 ofertas

    Requerimos un ingeniero que desarrolle un Dashboard para nuestro aplicativo responsive. Detalles específicos: -Se requiere experiencia con PHP. JavaScript, Bootstrap con MySQL. -Tener un portafolio de proyectos con relación al front enfocado a Dashboard de una app. - Idioma: Español

    €8 / hr (Avg Bid)
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    38 ofertas
    Desarrollador React JS para web 2 días left
    VERIFICADO

    Busco un desarrollador react js a jornada completa para web

    €217 (Avg Bid)
    €217 Oferta promedio
    90 ofertas

    El proyecto consiste en la creación de una plataforma web para la automatización de cambios en el contenido de un menú digital para una cadena importante de restaurantes, en donde el usuario puede acceder a distintos parámetros del menú y cambiarlos según se requiera, mediante una interfaz amigable e intuitiva que le facilite visualmente al usuario la edición del contenido.

    €1113 (Avg Bid)
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    57 ofertas
    barter quest 6 días left
    VERIFICADO

    I am looking to hire an experienced software engineer for my barter quest website. I am simply looking for a feature to be added to my existing code. The feature would be the ability to rate a user using a star rating with the ability to leave a short note and have the average star rating and note show up on the users profile.

    €42 (Avg Bid)
    €42 Oferta promedio
    3 ofertas

    Would like to grab FB users data to complete sign up on website and start entry of data into sites profile.

    €318 (Avg Bid)
    €318 Oferta promedio
    22 ofertas
    scrapping web pages 6 días left
    VERIFICADO

    Web Scraping Project using Python I am looking for a developer who can help me scrape text data from less than 100 web pages. Skills and Experience: - Proficient in Python programming language - Experience with web scraping tools such as BeautifulSoup or Scrapy - Knowledge of HTML and CSS - Attention to detail to ensure accurate data extraction Expected Deliverables: - Extracted text data in a structured format such as CSV or JSON Overall, I am looking for someone who can efficiently scrape data from web pages using Python while ensuring the accuracy of the extracted information. We need to deploy this as an API such as Flask or FastAPI. We need a scrapping time of around 200 ms per page

    €147 (Avg Bid)
    €147 Oferta promedio
    33 ofertas
    Fix date form in web page (php) 6 días left
    VERIFICADO

    I am looking for someone to fix the date form on my web page. Currently, the page is under development and is written in the PHP language. The main purpose of this page is to collect data from users. The fixes that need to be made should enable users to accurately provide their date input in the required format. I need someone who is familiar with both the PHP language and web page development to ensure the date form is functioning as it should. if you would like to check how it is now can go here:

    €37 (Avg Bid)
    €37 Oferta promedio
    28 ofertas

    I am looking for someone who can help me get a subscription to for one month. I need a personal subscription with premium support. I would like someone who has experience in setting up subscriptions for this website and who can provide clear instructions on how to use it.

    €3 / hr (Avg Bid)
    €3 / hr Oferta promedio
    1 ofertas
    SMS Platform 6 días left
    VERIFICADO

    I am looking for a developer to create an SMS platform. Here is the scenario: I'm a real estate broker, when my call center speaks to a lead that is ready to purchase a home my call center would then send a text to a group of agents announcing we have a hot lead. The agents would press 1 to accept the lead or 2 if they are not available. The 1st person to accept would win the lead and the lead details would be sent to them. Any subsequent agents responding with "1" would go down a different flow receiving the message "another agent already claimed this lead". That is the basic system needed. There would be additional sms going out to follow up with the agent to obtain updates as well. I am interested in message templates or other suggestions as to how this can be a...

    €593 (Avg Bid)
    €593 Oferta promedio
    59 ofertas
    create html page, css inside 6 días left
    VERIFICADO

    create html file , css inside the html file

    €21 (Avg Bid)
    €21 Oferta promedio
    65 ofertas

    I need a Google Script for my spreadsheet that will unzip a file from a specific URL and add it to the sheet daily. The files are always in the same format, and I need all data extracted from the unzipped file. The script should run automatically at a specific time every day. Ideal skills and experience for this project include: - Proficiency in Google Apps Script - Knowledge of how to access and extract data from zipped files - Familiarity with scheduling scripts to run automatically at specific times.

    €58 (Avg Bid)
    €58 Oferta promedio
    12 ofertas

    Need a front and backend developer for an app based payment system.

    €98 (Avg Bid)
    €98 Oferta promedio
    11 ofertas
    Bubble.io expert needed 6 días left
    VERIFICADO

    I am currently in the process of developing an MVP for my web app using bubble.io. The foundation has been created, however I am seeking an experienced Bubble Developer to finish off the project. The web app is a collaborative writing platform that requires users to be able to perform the following functionality: - Write and submit written articles to the community for feedback and voting. - Provide feedback on articles written by other users and vote on them (ie. publish now or send back for revisions). - Users have credits that they can use towards article submissions. Credits can be earned by providing feedback and voting on articles written by other users. - Additional credits can be earned when users invite their friends to join the platform via social media with a referral code. -...

    €77 (Avg Bid)
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    12 ofertas

    We are a vehicle tracking solution, and we are looking for an expert in both frameworks to continue working with us, as our previous developer left due to health issues, The application is already running, however, we need bug corrections, patch updates, and improvements, Also UI changes, Please get in contact, our website

    €208 (Avg Bid)
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    36 ofertas

    Figma design is done The website wil work exactly as same as e commerce only difference is , in place of product there will be service

    €89 (Avg Bid)
    €89 Oferta promedio
    14 ofertas
    Wordpress site general check 6 días left
    VERIFICADO

    My website is been detected as a threat by ESET Internet Security, I need a review of the site in order to detect what is causing this and get rid of it. The threat says that a JS/ was found (check the attach file)

    €29 (Avg Bid)
    €29 Oferta promedio
    36 ofertas
    API Automation for price ACTION 6 días left
    VERIFICADO

    API Automation for Price Action I am looking for a freelancer who can help me automate pricing updates on my platform using a custom API. The project requires someone who has experience in API integration and automation. The ideal candidate should have the following skills: - Experience in automation of pricing updates using APIs - Proficient in custom API integration - Strong programming skills in Python or JavaScript The project involves the following tasks: - Developing an API automation solution for price updates - Integrating the custom API with the platform - Testing and validating the automation system If you have the required skills and experience, please apply for this project.

    €143 (Avg Bid)
    €143 Oferta promedio
    37 ofertas
    Web Design 447 días left
    VERIFICADO

    Need a website where users can search specific products or information on that website

    €274 (Avg Bid)
    €274 Oferta promedio
    177 ofertas
    I need google extension made 6 días left
    VERIFICADO

    I am looking for a skilled developer to create a Google extension for me. The main function of the extension will be to permanently remove the telegram search bar from the website version. The ideal candidate should have experience in creating Google extensions and be able to deliver a clean and efficient solution. No additional features are required for this project.

    €19 (Avg Bid)
    €19 Oferta promedio
    13 ofertas
    Jest Unit Tests Help 6 días left
    VERIFICADO

    I am looking for a freelancer who can help me retroactively apply jest unit tests to my code base. Code base in written in javascript and is Node JS. I need the freelancer to sit with me on a call and help me fix issues until I am self sufficient.

    €18 / hr (Avg Bid)
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    39 ofertas

    I'm looking to create a new static website to sell products/services online. I would like it to be built using custom HTML/CSS. While I don't have a specific design in mind, I do have some ideas on what I would like for the layout and aesthetic of the site. I'm looking for a freelancer who is experienced in building static websites and who can create a beautiful and functional site.

    €52 (Avg Bid)
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    65 ofertas

    I am in need of a skilled chrome extension developer who can create an extension aimed at automating tasks. The extension will be used on a specific website and should have basic settings available for user customization. I am looking for someone with experience in developing chrome extensions and who is proficient in JavaScript and HTML. The ideal candidate should be able to work independently and have a strong attention to detail.

    €128 (Avg Bid)
    €128 Oferta promedio
    19 ofertas

    I am looking for a skilled web developer to build a website focused on both money and investments. The website will require a few key components, including a public forum, regular articles, and events. Forum: - The forum should be public, allowing for open discussion and engagement - Users should be able to create profiles, post comments, and engage with one another Articles: - New articles should be posted on a weekly basis - The articles should be well-researched and informative, covering a range of topics related to money and investments Events: - Regular events should be posted on the website - These events should be relevant to the website's focus and provide users with valuable information Ideal skills and experience for this project include: - Proficiency with we...

    €1055 (Avg Bid)
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    116 ofertas

    file:///C:/Users/HP/OneDrive/Bureau/learn%20programming%20with%20python/

    €143 (Avg Bid)
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    14 ofertas

    I am looking for a cross-platform JavaScript project that is compatible with web browsers. The main purpose of the project is data management. I prefer that the project be developed using React JavaScript framework. Ideal skills and experience for the job include: - Proficiency in cross-platform JavaScript development - Strong knowledge of React JavaScript framework - Experience in data management - Familiarity with web browsers and their compatibility requirements

    €265 (Avg Bid)
    €265 Oferta promedio
    15 ofertas

    You can find more information on the project by visiting our website. You can visit our website here I am looking for a skilled developer who can help me build an NFT marketplace for our platform. The marketplace will primarily focus on selling collectibles, and we prefer to use Ethereum blockchain technology. Please visit our website at for detailed info.

    €30 / hr (Avg Bid)
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    48 ofertas

    I am looking for a skilled Shopify developer to replicate an existing website design and layout to a new Shopify store. Store to replicate: The ideal candidate should have experience in designing and customizing Shopify themes. Menu should have: Home, Products, About, Contact us. Main Features: - Replicate the website design and layout - Set up a product catalog Additional functionalities: - Recommend and integrate apps to enhance the functionality of the store Skills and experience: - Shopify development - Theme customization - App integration Overall, I am looking for a professional and reliable developer who can deliver high-quality work within a reasonable timeframe.

    €185 (Avg Bid)
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    77 ofertas
    Sort out my Systeme.io issue 6 días left
    VERIFICADO

    The first email which needs to be sent out automatically when a new subscriber subscribes to my funnel using my in-line form is not being sent out. Can you fix this for me so that once a person opts in, they can receive their first welcome email? Note that I did not choose the double opt-in option when creating the form.

    €33 (Avg Bid)
    €33 Oferta promedio
    12 ofertas
    Animation adding to website 6 días left
    VERIFICADO

    I need a web developer to recreate an animation from this website: (the line going down the page) and adding to this website: We need it to look and work the same without it being a direct copy. The website is built with elementor on worpress

    €162 (Avg Bid)
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    96 ofertas

    Data Entry and Backup Export for Google Chrome Addon I am looking for someone to help me with data entry and backup export for a Google Chrome addon. Specifically, I need someone to enter passwords into the addon and export the backup file in a "bak" format. Ideal skills and experience: - Experience with Google Chrome addons - Expertise in data entry and backup export - Attention to detail to ensure accuracy of entered data - Proficiency in working with different file formats The backup file needs to be exported and sent one time only

    €22 (Avg Bid)
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    19 ofertas
    Sharepoint 2010 6 días left

    I am looking for a SharePoint 2010 expert to address specific issues that I am having with the platform. The primary goal of the project is to improve the JavaScript components on the platform. I have a concrete list of the functionalities that need to be addressed, and am looking for an expert with advanced level of knowledge and understanding on the subject. This project requires someone who is knowledgeable and experienced in SharePoint 2010.

    €19 (Avg Bid)
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    5 ofertas

    I am looking for a freelancer who can help me turn my Tradingview script into a strategy and a Ninja Trader bot. Here are the details of my project requirements: Trading Strategy: - I have a specific trading strategy in mind that I would like to turn into a bot. - The ideal freelancer should have experience in developing custom trading strategies. I would like the strategy first turned into a backtesting tool on Tradingview or show me how to backtest it on Ninja Trader. Trading Bot: - I prefer to use NinjaTrader 8 as the platform for the bot and Tradingview as the backtester. - The ideal freelancer should have experience in developing Ninja Trader bots. Financial Instrument: . - The ideal freelancer should have experience in trading stocks, forex or cryptocurrency. Overall, I am look...

    €534 (Avg Bid)
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    36 ofertas
    Build responsive page from Scratch 6 días left
    VERIFICADO

    I have need to build simple page from scratch using html and css to match the attached file request.

    €5 / hr (Avg Bid)
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    25 ofertas
    Need a Web scraper 6 días left
    VERIFICADO

    I am looking for a web scraper who can extract text data from multiple websites with different structures. The project requires real-time or frequent updates, and the ideal candidate should be able to automate the scraping process. The data required is text-only, and the final output should be in a structured format (CSV, Excel, etc.). The ideal skills and experience for this job include: - Proficiency in web scraping tools such as Python Scrapy, Beautiful Soup, etc. - Knowledge of web technologies such as HTML, CSS, and JavaScript. - Experience in data cleaning and data manipulation using tools such as Pandas, Excel, etc. - Familiarity with APIs, JSON, and XML. - Attention to detail and ability to handle large datasets. - Excellent communication skills and the ability to work independent...

    €16 (Avg Bid)
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    18 ofertas

    I am looking for a freelancer to create a selenium automation software to automate a custom website. The ideal candidate should have experience in selenium automation and be proficient in Google Chrome. The specific task required for the software is form filling, clicking, reading files and multi tasking.

    €122 (Avg Bid)
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    27 ofertas

    I am looking for a skilled CSS animator who can create professional and sophisticated animations for my website. My ideal candidate should be able to create animations that convey the tone and style I am looking for. I require a combination of both site-wide animations and specific element/page animations. The project timeline is tight and I would prefer completion within a week. The ideal candidate should have experience in CSS animation and be able to deliver high-quality work within a short timeframe.

    €148 (Avg Bid)
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    50 ofertas

    My Old Developer who was working on my project for 2 years, he left is suddenly and i am in middle on development phase with source code given by him. I am looking for new developer who can manage this project for me. I have old developer machine with me & source code installed into it. just need someone online who can connect and work remotely because i wont be able to share source code, its huge code so will be hard to share online. I am looking for someone long term with cheap cost, code is made in .Net core & angular project. The ideal candidate should have experience with .Net Core and Angular development, and be proficient in front-end development. If you have the required skills and experience, please apply for the job.

    €313 (Avg Bid)
    €313 Oferta promedio
    17 ofertas

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