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!

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    800 trabalhos encontrados, preços em EUR

    Preciso de um desenvolvedor/programador, para construir um script que automatiza clicks dentro de uma url, eu preciso seguir uma quantidade especifica de pessoas no dia e para fazer isso preciso configurar um comando/script dentro de uma ferramenta/extensão que uso o AutoClick , preciso que esta ferramenta clique em botões especificos dentro da url, mais pra ela funcionar tenho que saber quais elementos, atributos dos botões ela deve clicar. Sem habilidades de um desenvolvedor/programador não consigo configurar, acredito que para configurar não vai ser tão dificil, e sabendo o básico já conseguimos resolver isso!

    €28 (Avg Bid)
    €28 Média
    5 ofertas

    Estou buscando um professor para me ensinar a programação, se possível, todos os dias a noite, atualmente eu sou assistente e não ganho muito, quero aprender a ser um programador Full Stack. Eu já pesquisei no Google sobre, mas, sempre o valor mensagem fica em 1mil reais, mas, podemos negociar, eu estudar e depois quando estiver com um trabalho na área eu pago um valor mensal, eu sei que pode ser chato isso, mas, garanto a minha palavra e quero aprender muito a programar e dar uma condição melhor pra minha mãe e minha família.

    €18 (Avg Bid)
    €18 Média
    3 ofertas

    Desenvolvedor com conhecimentos em NodeJS e Typescript, para integração da nossa plataforma com as api de cada uma destas plataformas e pagamento feito por integração feita e com valores para cada uma Amazon (valor por esta integração entregue R$800,00) Ali express BR (valor por esta integração entregue R$800,00) Netshoes (valor por esta integração entregue R$600,00) Magazine luiza (valor por esta integração entregue R$600,00) B2W (valor por esta integração entregue R$600,00) Via Varejo (valor por esta integração entregue R$800,00) shopify (valor por esta integração entregue R$800,00) Nuvem shop (valor por esta integração entregue R$800,00) loja inte...

    €777 (Avg Bid)
    €777 Média
    7 ofertas

    Pode rodar em APK ou totalmente na nuvem com Angular ou Flutter. Um módulo de cadastro, que vai rodar em smartphone ou tablet, que vai fazer a foto da pessoa e coletar dados relevantes. Deve coletar também um "vídeo ou áudio" curto que é onde a pessoa vai "falar" que aceita a coleta dos dados. Outro módulo ficará em um tablet, em modo coleta, esperando capturar a face e então vai pesquisar 1:n na base, Se identificar, marca a presença no "período"*. Caso já tenha feito checkin no período, uma msg avisará - e registra no banco Caso não tenha feito, marca a presença e dá a devida mensagem. *períodos São os eventos que podem ser cadas...

    €65 (Avg Bid)
    €65 Média
    3 ofertas

    Precisava de um programador de python com django que saiba fazer o multilanguage pra website. Preciso da estrutura e funcionalidades pra que eu posso selecionar a linguagem que eu queira desejar o no website, tenho os textos em ambas linguagens. O site já está pronto e também hospedado.

    €34 (Avg Bid)
    €34 Média
    9 ofertas

    Preciso de uma API que possa receber qualquer tipo de Arquivo e salvar no servidor em pasta informada. Essa API deve apresentar os arquivos de uma pasta e subpastas, permitindo, gravar, alterar ou excluir arquivos ou pastas. Preferencialmente desenvolvida em ASP CORE

    €483 (Avg Bid)
    €483 Média
    8 ofertas

    Hola me gustaria, hacer la integracion de un programador para integrar el checkout api de mercado pago. Por favor desarrolladores latinos que estan mas familiarizados con esta integracion.

    €9 - €28
    €9 - €28
    0 ofertas

    Necesito implementar bien sea una Api de easy invoice o un app script de google que no dependa de alguna hoja de cálculo como tal. Un generador de factura como la adjuntada. En la plataforma de thunkable. Solo sería un botón que junto con el componente Api Web genere la URL para la descarga en .PDF para posteriormente compartir. Podrían usar el ejemplo de este link para la estructura de datos.

    €19 (Avg Bid)
    €19 Média
    3 ofertas
    finish nextjs app . 6 dias left
    VERIFICADO

    I need a (backend & frontend) developer that can complete an existing app. It's a subscription marketplace that will allow users to: - open, access, manage, update, recover, & exit accounts; - list & manage companies; - browse, buy/pick(first-time), sell/push, buy/pull, & manage subscriptions; - create, duplicate, update, delete, & view briefs(posts) ~ admin only; The backend and frontend for most of the above tasks have already been completed by the previous developer. However, some tasks are yet to be completed. Kindly come to chat about what's left to be done. Kindly note that the below demo video is just for the overview of the app, it doesn't explain some tasks such as posts ~ thanks. The app requires a deep knowledge of (backend & fronte...

    €23 (Avg Bid)
    €23 Média
    14 ofertas

    Buscamos persona con experiencia en desarrollo que nos ayude en el mantenimiento de una aplicación de FACTURACION ELECTRONICA híbrida desarrollada en .NET, NodeJS y angular 10+. Buscamos desarrollador interesado en un contrato inicial de 4 semanas (80 horas) y luego según su desenvolvimiento ofrecemos contrato a largo plazo full-time con la implementación de otras aplicaciones. We are looking for a person with development experience to help us in the maintenance of a hybrid ELECTRONIC BILLING application developed in .NET, NodeJS, and angular 10+. We are looking for a developer interested in an initial contract of 4 weeks (80 hours) and then depending on your performance we offer a long-term full-time contract with the implementation of other applications.

    €412 (Avg Bid)
    €412 Média
    11 ofertas
    Crawler in Google script 6 dias left
    VERIFICADO

    Crawler in Google Script I need a Google script that can do the following: - Visit the website "" - Navigate to the "Calendario" section (Note: the "calendario" link is located between the "resultados" and "equipos" links) - Read all the match results and store them in an array - Each element of the array should be an object that includes the following data: -- Match Day number (labeled "Jornada") -- Home Team (labeled "Local") -- Home team score -- Visitor Team (labeled "Visitante") -- Visitor score -- Date -- Stadium (labeled "Campo") Additional comments: - The deliverables should include: -- The Google Script function code -- A video showing how the sc...

    €199 (Avg Bid)
    €199 Média
    10 ofertas
    MERN Stack 6 dias left

    Hello, my name is [Shivam]. I am looking for experienced back end developers to build a MERN stack API. I need someone with expertise in Node.js to build the backend architecture. No front end development is required. This project requires strong knowledge of Node.js and MongoDB so that all components integrate seamlessly. Accurate and timely delivery is expected, and knowledge of the MERN stack ecosystem is recommended. If you have any questions, please feel free to reach out. Thank you for your time.

    €168 (Avg Bid)
    €168 Média
    1 ofertas

    The work includes 1. Re designing UI/UX few pages which are identified. 2. Javascript and Bootstrap used pages. 3. 4 to 5 pages modification needed.

    €43 (Avg Bid)
    €43 Média
    11 ofertas

    It is made up of thousands lines of code and created in visual studio code.

    €298 (Avg Bid)
    €298 Média
    5 ofertas

    Looking for a program that can read my scripts out loud, and had multiple different voices. The program must be able to process 50,000 words at a time (maximum) Voices must sound natural, and I should be able to export the readings as .WAV and MP3's Strict budget on this, will need other programs down the line if you can make this one successfully.

    €149 (Avg Bid)
    €149 Média
    11 ofertas
    Daily Expense record 6 dias left
    VERIFICADO

    To create a few web pages for daily expense records. User profile will show their own daily expense with shop/individuals. The transaction records will be displayed in a list with the payment title, amount , start date and the status(settled or not). Login pages is required.

    €145 (Avg Bid)
    €145 Média
    37 ofertas

    I am looking for a full stack developer skilled in both React JS and Golang to join my team for a long term contract. The work can be done either on-site or remotely and I'm looking for someone with an intermediate skill level. This is a monthly contracted position, which will give you the opportunity to really make a difference to my business. React JS: Skillset: HTML5 CSS frameworks Javascript React Js Chart library such as Amcharts, Highcharts Experience handling Real time data REST and Websocket API Ability to understand others code Golang: API Development for REST and Websocket Golang Advanced level Cloud Deployment

    €598 (Avg Bid)
    €598 Média
    11 ofertas

    I need an expert HTML/JavaScript/PHP for make a webpage to automatically cut areas of an image that correspond to locations on a campsite map and send pixel and GPS coordinates to MySQL database in PHP. The script must also draw the cutout areas on the plan for check if it's correct. I need an input to upload a image and the script automatically apply the process. By hand this is a long and tedious job I want a script that automates the process. you can use public libraries such as CannyEdge... or other. But not a framework. The script must work with all filetype jpg, png.

    €484 (Avg Bid)
    €484 Média
    47 ofertas

    An e-commerce website is an online platform that enables businesses to sell their products and services to customers over the internet. Django is a high-level Python web framework that is commonly used for building complex, data-driven web applications, including e-commerce websites. With Django, developers can create an e-commerce website that offers a range of features, such as a user-friendly interface for browsing products, adding items to a shopping cart, and securely processing payments. Django also supports a range of authentication and security features to protect user data and sensitive information.

    €6 / hr (Avg Bid)
    €6 / hr Média
    8 ofertas

    I am looking for a react.js professional to provide development assistance on an urgent project(job support). Specifically, I need help debugging, running code reviews and other technical code related tasks. The project has several specific tasks related to react.js that need to be done within 1-3 hours. In order to succeed in this job support, strong knowledge of react.js is a must. The right candidate should have excellent problem-solving skills as well as be able to explain technical concepts at a high level. If you think you’re qualified for this job support, please apply!

    €59 (Avg Bid)
    €59 Média
    3 ofertas

    Buscamos un programador que sea capaz de programar un pine script para trading view y meta trader 5, el cual ejecute ordenes de compra/venta de shorts y longs con unas determinadas especificaciones.

    €172 (Avg Bid)
    €172 Média
    5 ofertas

    I want to create reactjs page portfolio, this is very simple page.

    €25 (Avg Bid)
    €25 Média
    27 ofertas
    Browser Updates expert 6 dias left
    VERIFICADO

    Need a person who is good with browser updated and update our landing page according to new updates from browsers.

    €91 (Avg Bid)
    €91 Média
    6 ofertas

    i have a classified script from codecanyon, it is quite a simple script and i have a html template.. please see below. to All pages fit each other but some menu icons may not be in html template which you can add or creat.. All should work like on default script, what ever menu i click, post, send etc, i shouldnt get any eror. Also speed need to be protected, when you code , you need to use quality but not short way of coding. It should be clear work and also the script is multilanguage translation should be applied too when ever i add new language. This is the first task and after this we will move second part which i will open a new project.

    €145 (Avg Bid)
    €145 Média
    33 ofertas

    I am looking for a web-based chatting application that is coded in Any language and has messaging and voice calling features. I want the application to be secure and have a user database. Required features • A user can send a message to friends, and message can be text, picture, or short video. • A user can receive a message from a friend. • A user can search its chat history (only consider text). • All chat histories are stored in the cloud server. • We do not want the cloud server to learn anything about any chat history. • Ideally, we do not want the cloud server to learn anything about a user, e.g., communication pattern and connections with other users. Deliverables Three items need to be submitted, the source code, the document, and the presentation sl...

    €398 (Avg Bid)
    €398 Média
    6 ofertas

    I need a developer that can design Cyclos (Java) system and make a few small changes to some custom code.

    €463 (Avg Bid)
    €463 Média
    31 ofertas

    We need a very simple wholesale ordering system developed for a website. There is no pyament gateway integration required - it is simply an order form which will be sent by email and stored in the db. Full details in the attached document. Please do not auto-reply - read the document and give me a proper quote/bid.

    €191 (Avg Bid)
    €191 Média
    33 ofertas
    lead capture page 6 dias left
    VERIFICADO

    We require a professional web developer, to create a lead capture page for our solar panel company in the UK. The landing page must be ultra modern, easy to navigate, and be compatible to all devices.

    €163 (Avg Bid)
    €163 Média
    58 ofertas

    We are currently seeking a skilled HTML/CSS coder to transform a Figma page into precise pixel-perfect code. The webpage in question is intended to serve as a web-based dashboard for managing an escrow company, and the Figma link for this project can be found here: Once a freelancer is hired, further specifications regarding the project requirements will be discussed via chat or call. However, it is important for interested candidates to review the Figma link provided in order to assess the necessary components involved. We are looking for a quick and efficient delivery of the project.

    €19 / hr (Avg Bid)
    €19 / hr Média
    71 ofertas
    Bus ticketing system 6 dias left
    VERIFICADO

    I need a bus ticketing system that allows companies of transport. The bus owners will be able to create accounts, add bus details, available sits, routes, prices and payment options (See example).

    €10757 (Avg Bid)
    €10757 Média
    116 ofertas

    After edge chromium update user are not reaching final url. Attached is the file we use to navigate user depending on browser.

    €12 (Avg Bid)
    €12 Média
    8 ofertas
    Website using Webflow 6 dias left
    VERIFICADO

    Webflow is a website builder, you need to have a freelancer account on Webflow for working on my project. It is a SAAS website, with the usual sections. I already have a free template, needs to be fixed, 3-4 pages, add graphics, icons animation and SEO optimization.

    €140 (Avg Bid)
    €140 Média
    33 ofertas

    Se requiere Programador para crear un plugins para factura electrónica Colombia. PHP facturascript. El plugins debe contar con las siguientes caracteristicas: Ajustable Generar codigo QR Generar codigo cufe Direccion del Interactuar con la plataforma de la dian, segun Anexo tecnico: Anexo imagen de campos obligatorios sugeridos.

    €195 (Avg Bid)
    €195 Média
    7 ofertas

    We are in the process of launching a new marketplace website to which we are looking to work with a designer who can help create the design, appearance and overall look and feel. We are looking for a dynamic responsive design for both desktop, mobile and tablet platforms. Our corporate image changes based on day of the week. On Monday, we use our main colour 'grey', plus support colour 'blue'. On Tuesday's we use 'red' instead of blue. Each day this process continues using purple, green, orange, etc. Therefore, you must create a design this is supportive of our rotating colour pallet. We are looking for a modern design with shadowing/effects, animation, custom buttons, transitions and overall dynamic and modern feel. Because we are a marketplace,...

    €92 (Avg Bid)
    Garantido Secreto
    €92
    6 inscrições

    We want to develop website for online casino. Only experience freelancer required for this project .Only bid if you've previous experience in building online casino website. Attach your previous work related to casino website with your bid for consideration. Without previous work your bid is not consider. This is a big project so provide me the timeline and your price with your bid. We're not going to negotiate in chat box so bid your real price for this project. sample website :

    €168 - €842
    Secreto ADC
    €168 - €842
    13 ofertas

    I am looking to hire a developer to create an advanced animation for adding items to the cart using Vue.js. I want the animation to have the highest level of complexity and am leaving the custom design to the developer's creative discretion. I'm looking for an animation that takes advanced actions such as complex transitions and hover effects. I expect the final animation to be responsive, interactive, and highly engaging.

    €154 (Avg Bid)
    €154 Média
    49 ofertas

    I'm looking for a freelancer to help me with the integration of a payment gateway for my mobile app. The payment gateway will be used to accept payments through gcash, paymaya, and coinph. This project will require coding at a full stack level, meaning the freelancer will need to have experience in API development. The goal is to create a seamless integration within the mobile app, where users can easily and securely transact using these payment methods.

    €55 (Avg Bid)
    €55 Média
    12 ofertas
    Agnet /angular project 6 dias left
    VERIFICADO

    I wanted you to ui developers for my website in angular fully responsive website if you have skills on this field then connect I don't want to work with any brokers I want 1 connect only developer

    €5 / hr (Avg Bid)
    €5 / hr Média
    17 ofertas

    Hello, I need to build a Power Apps Portal integrated with SharePoint and looking for an individual who already has experience working with this product. The required skills: Experience working with Dynamics 365 Power apps portal working with liquid templates. Professional in Javascript and fron-end scripting. Thanks

    €9 / hr (Avg Bid)
    €9 / hr Média
    24 ofertas

    Need Betting Live API with ball to ball winning ratio changle ratio

    €144 (Avg Bid)
    €144 Média
    9 ofertas
    fix MERN project 6 dias left

    I need some help fixing a MERN project that I am working on. My project is built using React, Node.js and MongoDB. I have an issue that needs to be addressed immediately, and I need a testing phase before deployment. I am looking for an experienced developer who can help me identify the problem and build a solution for it. The developer will also need to complete any necessary testing and debugging in order to ensure that the project is ready for deployment. Thanks for your interest!

    €469 (Avg Bid)
    €469 Média
    62 ofertas
    Notification through webhook 6 dias left
    VERIFICADO

    We have leave management module and for that we need to send notification through webhook of leave is rejected or approved

    €99 (Avg Bid)
    €99 Média
    6 ofertas
    Web page Perfomance Improvments 6 dias left
    VERIFICADO

    Web Page Experience Mobile & Desktop Both Remove Unuse Java & CSS LCP Score FID Score CLS Score

    €23 (Avg Bid)
    €23 Média
    8 ofertas
    finish nextjs app .. 6 dias left
    VERIFICADO

    I need a (backend & frontend) developer that can complete an existing app. It's a subscription marketplace that will allow users to: - open, access, manage, update, recover, & exit accounts; - list & manage companies; - browse, buy/pick(first-time), sell/push, buy/pull, & manage subscriptions; - create, duplicate, update, delete, & view briefs(posts) ~ admin only; The backend and frontend for most of the above tasks have already been completed by the previous developer. However, some tasks are yet to be completed. Kindly come to chat about what's left to be done. Kindly note that the below demo video is just for the overview of the app, it doesn't explain some tasks such as posts ~ thanks. The app requires a deep knowledge of (backend & fronte...

    €187 (Avg Bid)
    €187 Média
    31 ofertas

    I need web based work in JSP java I need one developer from Pakistan I need new and junior freelancer at low budget work

    €5 / hr (Avg Bid)
    €5 / hr Média
    5 ofertas

    I have a tradingview strategy that I would like fixed. The problem is that when an arrow shows on the tradingview strategy, no alert gets fired. instead, it shows bars after which is not right. I need the alert to get generated AS SOON AS the arrow and BUY/SELL message appear on the chart. So far, I have not been able to do this. 1. Buy/Sell arrow must avoid certain times of the day, which means there should be no signal showing within this time period. I will specify the start and end time for this. 2. Trade should only be executed if the Heiken Ashi candle on the current time frame(standard trading view Heiken Ashi candles) match the signal. So if the signal was Buy, the Heiken Ashi candlestick must be green, if its red, it should NOT show a signal. 3. Email alert must be sent exactl...

    €24 (Avg Bid)
    €24 Média
    6 ofertas

    I am looking for someone that can help me to build a chrome extension. I want to be able to talk to the extension. With that I mean to be able to: Send a message to it so it goes to the webpage I send. I have seen that you should be able to use some kind of native messaging that should be able to talk to an extension. My thoughts was to setup an java application with Telegram and thru that connect with the extension over native messages if possible. I will be able to fix the java application with Telegram setup myself but I need to help with the code that should be sent inside my application to the extension and the extension itself. This will be used for me to help my parents change pages on their webbrowser when they will look at for example which is a free swedish stream service. My...

    €34 (Avg Bid)
    €34 Média
    8 ofertas

    I already have a NAVBAR. I need a searchbox to fit in it (align) on the rightside both for regular and for media queries. The search box should show input box with magnifying glass at the end to send the query back to the Python server. I need autocomplete suggestions defined in Javascript.

    €16 (Avg Bid)
    €16 Média
    6 ofertas

    Hello We need a developer who has enough knowledge of Headless CMS and GraphQL and did some project in that technologies. Want to redesign my website using Headless and GraphQL. Please reply only if you have enough experience only. Detail will be shared later. Thank You

    €729 (Avg Bid)
    €729 Média
    21 ofertas

    There are minor bugs which needed to be fixed. in NextJS .

    €83 (Avg Bid)
    €83 Média
    16 ofertas

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