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 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 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, is the place to post your project. Hire our expert Javascript developers today!

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    Ho già implementato i file IPN, success e il codice javascript. Vorrei un integrazione per passare in Live mode con API.

    €29 (Avg Bid)
    €29 Offerta media
    6 offerte

    Mi serve creare una calcolatrice di scommesse come questa qui:

    €153 (Avg Bid)
    In primo piano
    €153 Offerta media
    14 offerte

    Ciao! Ho bisogno di integrare Google reCAPTCHA in un modulo di contatto PHP.

    €39 (Avg Bid)
    €39 Offerta media
    11 offerte

    Sei un programmatore php appassionato e competente? Hai esperienza con prestashop e vuoi mettere in pratica le tue abilità in progetti stimolanti e innovativi? Allora questa è l'offerta che fa per te! Stiamo cercando un programmatore php a partita iva per collaborare con il nostro team di sviluppo web. Offriamo una retribuzione tra i 15 e i 30 euro l'ora in base alla proprie conoscenze, a seconda delle competenze e della qualità del lavoro. Puoi lavorare da casa e gestire i tuoi orari in autonomia, purché rispetti le scadenze e le richieste dei clienti. Se sei interessato a questa opportunità, inviaci il tuo curriculum e il tuo portfolio di progetti realizzati con php e prestashop. Ti contatteremo al più presto per fissare un colloquio ...

    €23 / hr (Avg Bid)
    €23 / hr Offerta media
    22 offerte

    I am looking for a Flutter developer who can understand PHP code and integrate a MySQL database into my project. As a beginner in Flutter development, I am open to suggestions regarding specific APIs or databases that may need to be integrated. The ideal candidate should have experience in Flutter development and a strong understanding of PHP code. Additionally, experience with MySQL databases is required for this project.

    €20 (Avg Bid)
    €20 Offerta media
    9 offerte
    The Web-Dev Project 6 giorni left

    Looking for a skilled web developer to create a social networking website. The website will require the use of HTML, CSS, and JavaScript. The ideal candidate will have experience in creating social networking websites and will be able to work within a tight timeline of 1-2 months. Any suggestions for technologies or platforms are welcome, but the client prefers to use HTML, CSS, and JavaScript.

    €6 / hr (Avg Bid)
    €6 / hr Offerta media
    6 offerte

    I have a website whose mobile home page always opens in Reader Mode in Safari. I think this may be driving away visitors, so would like the page to open with its normal styling (ie without Reader Mode). I have done some research online, but can't find any code that I can put in the page's code to block Reader Mode. This problem also affects 2 other sites of mine, one of which is WordPress. However, I presume that there must be a simple universal fix that could be used on all 3 sites. Does anyone know of a quick fix to block Reader Mode? The sites are , and

    €38 (Avg Bid)
    €38 Offerta media
    16 offerte

    We are looking for an experienced Full Stack developer who can add high priority features to our existing web application. The ideal candidate should have expertise in React, NextJS, MongoDB, and NestJS. Responsibilities: - Collaborate with our team to identify and prioritize high priority features - Develop and implement new features to enhance the functionality of the existing web application - Troubleshoot and fix any bugs that may arise during development - Ensure the performance and scalability of the application Requirements: - Strong proficiency in React, NextJS, MongoDB, and NestJS - Experience in developing and maintaining web applications - Excellent problem-solving skills and attention to detail - Ability to work independently and as part of a team - Good communication skills...

    €19 / hr (Avg Bid)
    €19 / hr Offerta media
    48 offerte

    We are looking for a talented, motivated, and experienced Front-End Developer specializing in React and to join us on a freelance basis. The ideal candidate will help us build an interactive, user-friendly website for teaching children. Your primary responsibility will be the development of the front-end interface, implementing the visual and interactive elements that users engage with when using the application. Responsibilities: Develop a high-quality, engaging, and intuitive front-end user interface for the children's education platform. Use React and to build interactive and dynamic components. Translate the needs of our project into functional and appealing digital features, aiming to provide an engaging and user-friendly experience. Use responsive web design techniques to en...

    €1108 (Avg Bid)
    €1108 Offerta media
    56 offerte

    I am looking for a developer to create a Chess App in Angular. The app should have the following features: - Basic chess game - Online multiplayer - AI opponent (advanced difficulty) I would like the app interface to have a modern design that is user-friendly and easy to navigate. Ideal skills and experience for this job would include proficiency in Angular, as well as experience developing games and creating interfaces.

    €603 (Avg Bid)
    €603 Offerta media
    33 offerte

    The Rick and Morty writing team needs a software tool to help them draft the scenes for their episodes in the upcoming season. For a given episode, they would like the tool to: Add or remove scenes to the episode Add or remove characters per scene Set the scene’s location Set a text description for the scene Using the Rick and Morty GraphQL API as a data source for characters and locations, write an application that uses React and Typescript to accomplish the given requirements. Feel free to reach out with any questions. Once you have completed the challenge, please send us your solution via a GitHub link. Please note: Although using React and Typescript is required, this challenge is left open deliberately and you are free to complete it in the way you believe is best...

    €482 (Avg Bid)
    €482 Offerta media
    26 offerte
    Chess game website 6 giorni left

    I am looking for a skilled developer to create a Chess game website for advanced players. The website should include a player vs player mode and should not include any tutorials or educational content. The ideal developer should have experience in creating interactive chessboards and implementing chess engine analysis.

    €2763 (Avg Bid)
    €2763 Offerta media
    53 offerte

    I am looking for a skilled developer to reengineer an existing source code for a legacy system written in Java. The main goal of this project is to refactor the code that has bad smells and improve its performance to enhance its maintainability. The estimated size of the source code is small, with less than 1,000 lines. Ideal skills and experience for this job include: - Strong knowledge and experience in Java programming language - Expertise in code refactoring and optimization techniques - Familiarity with legacy systems and their challenges - Ability to identify and fix code smells - Experience in improving performance of small code bases If you have the skills and experience required for this project, please submit your proposal with a brief summary of your approach to the ta...

    €27 (Avg Bid)
    €27 Offerta media
    12 offerte

    any joomla developer amin 1 to 3 year experience salary 20000 inr to 50000inr interview on teamviewer or anydesk

    €10 (Avg Bid)
    €10 Offerta media
    3 offerte
    Dtmf capture 6 giorni left

    DTMF Capture for Real-Time Website Our project requires the capture of all DTMF key tones in real-time on a website. We are looking for a developer who can help us with the following: • Design and development of a DTMF capture system for a website • Ability to capture all DTMF tones • Ability to capture more than 5 simultaneous DTMF captures Ideal Skills and Experience: • Experience in DTMF capture systems • Knowledge of web development • Strong coding skills in programming languages such as Java or Python If you have the necessary skills and experience, please contact us to discuss our project further.

    €201 (Avg Bid)
    €201 Offerta media
    17 offerte
    Fix small PHP issue in wordpress 6 giorni left

    This is a very easy task. It's just fixing an error in a PHP query on WordPress that is not returning the correct results. It needs to be done now. If you're a good professional, I'll hire you for larger projects. Budget will not be negotiable. If you have read the text, please say your name and age.

    €22 (Avg Bid)
    €22 Offerta media
    29 offerte
    WEBFLOW EXPERT REQUIRED. 6 giorni left

    Need a Dedicated WebFlow Expert. Keep ready the following details. 
Please answer the Following Questions: 
 on WebFlow
 in years with Plugins.
(Name of Plugins) with Real Estate Website and API Integrations? you able to begin right away?
 you an individual developer? Note:Only Bid if you are a individual not overbid the Budget of the project Cost.

    €3 / hr (Avg Bid)
    €3 / hr Offerta media
    8 offerte

    -Fix google ads disapproval for malicious software PAYMENT WILL BE RELEASED STRICTLY ONLY AFTER AD IS APPROVED

    €78 (Avg Bid)
    €78 Offerta media
    5 offerte

    We're using a program called WinHTTrack to download a HTML version of a website. WinHTTrack is OpenSource and free to use. We would like upload the WinHTTrack output files (will be provided) to an Amazon HTML bucket. This job is to figure out a process of utilizing the output of WinHTTrack and change whatever files so that the website displays correctly and is functional via the AWS bucket URL. Once a process is figured out, we'd like a video made (sound is not required) that goes thru and shows the process starting from creating a bucket, step by step video procedures and then finishing with how to upload to the bucket along with testing to verify the website is functioning correctly. Deliverable will be an explanation video going thru the step by step procedures of setting...

    €182 (Avg Bid)
    €182 Offerta media
    32 offerte

    Any, can be discussed, ideally would be low cost option as it will be website of only one or max 2 page

    €30 (Avg Bid)
    €30 Offerta media
    24 offerte

    I am seeking a developer who can create a build of my Android application code using Java. I have already tested the application code on different devices and emulators. The build should only focus on bug fixes to ensure the smooth functioning of the application. Ideal skills and experience for the job include: - Proficiency in Java programming language - Experience in Android application development - Knowledge of debugging and bug fixing techniques - Attention to detail to ensure that all bugs are fixed If you have the required skills and experience, please feel free to bid on my project.

    €6 / hr (Avg Bid)
    €6 / hr Offerta media
    3 offerte

    Need a plugin fixed for Rainloop 1.17 that sets autoreply directly in hmailserver mysql-db. Both php running on IIS The attached files worked on some earlier versions, but gives "Invalid plugin package" now. Be aware: There is very limited documentation on plugin development for Rainloop!!

    €148 (Avg Bid)
    €148 Offerta media
    11 offerte
    Custom time slider leaflet 6 giorni left

    I am looking for a skilled developer to implement a custom range slider for leaflet. The design has already been created, but I need a developer to create the appropriate code necessary for leaflet. Ideal Skills and Experience: - Experience with Leaflet library - Proficiency in JavaScript, HTML, and CSS - Familiarity with data visualization and mapping - Ability to create and customize a time slider component - Strong problem-solving and communication skills

    €22 (Avg Bid)
    €22 Offerta media
    17 offerte

    I am using pycharm and looking for someone to amend the following code (see attached) so that it can scape the data from multiple URL's from the same website. The URL's are in the same/similar format. Then add in a formula (that divides two cells) and sorts the grouped data in the exported csv file (see attached file: Detailed Explanation on what I need the code to ). The one csv is to include the data from all URL's (see attached file: Summary Spreadsheet csv ). Message me for more information.

    €18 - €152
    €18 - €152
    28 offerte

    I am looking for someone to provide ongoing support with my Bigcommerce website and Stencli CLI. The ideal candidate should be somewhat familiar with these platforms and have experience working remotely using Zoom. The project will involve the following: • Providing ongoing support for my Bigcommerce website and Stencli CLI • Troubleshooting any issues that arise • Providing guidance and recommendations for improving website performance Ideal Skills and Experience: • Familiarity with Bigcommerce and Stencli CLI • Experience providing ongoing support for ecommerce websites • Knowledge of website performance optimization techniques • Excellent communication skills, especially when working remotely using Zoom.

    €14 / hr (Avg Bid)
    €14 / hr Offerta media
    20 offerte

    I need a class jar that extracts the text for text fields and comboboxes from a one page interactive PDF. Can use PDFBox or any other free download JAVA PDF API (SpirePDF, Qoppa JavaPDF, and so on) . The extracted fields need to be posted to a derby db for later manipulation (Derby db File will be included). The PDF is an "exam" where the user selects the answer from the combo box pulldown selections. I will provide current base program jars (using Netbeans 17 and Zulu OpenJDK 17) and an empty class file with the needed variables and imports. Must keep the programming simple with sufficent comments explaning the main methods used.

    €151 (Avg Bid)
    €151 Offerta media
    15 offerte
    Website with API INTEGRATION 6 giorni left

    I am looking for a web developer to create a web application. The project requires API integration with a specific API that I have in mind. I am open to suggestions if the developer has experience with other APIs that may work better for my project. The website will be a web application, and I require a developer with experience in this area. The ideal candidate should have experience with API integration and creating web applications. I have a website sample of what i need.

    €994 (Avg Bid)
    €994 Offerta media
    160 offerte

    I am looking for a freelancer who can help me add a fingerprint function using Javascript, specifically the DigitalPersona 4500. I already have the necessary hardware, so no need to purchase it. The level of integration I require is basic. Ideal skills and experience for the job include: - Proficiency in Javascript - Experience with DigitalPersona 4500 - Knowledge in security and access control systems - Ability to integrate basic functions into existing systems

    €123 (Avg Bid)
    €123 Offerta media
    23 offerte
    Java Enterprise Edition App 6 giorni left

    The developer must know Romanian language! I am looking for a Java Enterprise Edition developer to create a basic CRUD app with a small user base of less than 10 users. The primary function of the app is data management. I am looking for someone with experience using Payara server. The frontend shall be created with Angular or JSP. There are no specific features or integrations required for the app. The developer must know Romanian language!

    €155 (Avg Bid)
    €155 Offerta media
    15 offerte
    Custom code for Squarespace website 6 giorni left

    I am looking for a developer who can help me add a custom form to my Squarespace website. Need to add a function to attach a photo to the current form. Would also like to help organize incoming messages so they don't overlap.

    €24 (Avg Bid)
    €24 Offerta media
    21 offerte

    Create a shopify app by signing up for and build a UI interface mockup based on some examples shared. You will need to generate a shopify app based on best design and UI principles. Attached below are a few examples that can serve as reference, they do not need to be exact and even a dark theme will also work I just want - at least 2 scorecards, one graph and one table with two filters. One for date range and the other can be any other dimension that is used.(mandatory) please use mock data, I just need your front end design Use react Need it before 2 june 2023

    €11 (Avg Bid)
    €11 Offerta media
    3 offerte

    Job Description: We are seeking a dedicated and talented freelance software developer, with proficiency in React Native, Expo, JavaScript, AWS services including Cognito, and Amplify. This individual will be instrumental in enhancing an existing mobile app, specifically by integrating Google and Apple authentication systems to facilitate user access. Key Responsibilities: Implement Google and Apple authentication functionality on an initial login screen of a React Native app using Expo. Seamlessly connect the aforementioned authentication to our existing AWS Cognito user pool. This will enable user-specific functionalities within the app. Leverage our existing Google Cloud Console account, which already has web client ID, iOS client ID, and Android client ID set up. Desirable Expertise...

    €21 / hr (Avg Bid)
    €21 / hr Offerta media
    52 offerte

    Data Structured and Algorithms in JavaScript ( Node.JS, ES ) in simple, clean, reusable code.

    €22 / hr (Avg Bid)
    €22 / hr Offerta media
    25 offerte
    Algorithms 6 giorni left

    JavaScript Algorithms and Data Structures

    €19 / hr (Avg Bid)
    €19 / hr Offerta media
    24 offerte
    sorting-visualizer 6 giorni left

    Responsive visualizer built using React for popular algorithms

    €22 / hr (Avg Bid)
    €22 / hr Offerta media
    23 offerte
    Virtual Hairstyler 6 giorni left

    I am looking for someone who can develop a web application which enables visitors to 'try on' different hairstyles in a virtual window. I can send examples for reference.

    €1292 (Avg Bid)
    €1292 Offerta media
    62 offerte
    Alfresco SDK 6 giorni left

    I am in need of a skilled developer who is experienced with Alfresco Community Edition. The project involves developing custom actions using the Alfresco SDK. The ideal candidate will have experience with customizing Alfresco using the SDK and will be familiar with the Community Edition. Additionally, the candidate should have experience working with existing code, as we have existing code to reference for this project.

    €967 (Avg Bid)
    €967 Offerta media
    17 offerte

    I am looking for a professional to integrate ChatGPT into my website's landing page. I need the chatbot to have integration with backend systems for more complex tasks. I am not sure if I want to use an existing chatbot or platform, so I need your advice on this. The primary purpose of the chatbot on my website is user engagement onboarding and interaction. Ideal Skills and Experience: - Experience with ChatGPT integration - Knowledge of backend systems integration - Ability to advise on the best chatbot or platform to use - Experience with user engagement and interaction in chatbots - Strong communication skills to ensure the chatbot meets my requirements.

    €355 (Avg Bid)
    €355 Offerta media
    84 offerte

    We are looking for a Senior Full Stack Engineer who can build a website for us. Our preferred technology stack is Laravel & Vue.js. We already have detailed wireframes and designs for the website, so the ideal candidate should have experience in developing web applications from designs. Required skills and experience: - Strong knowledge of Laravel and Vue.js - Experience in building websites and web applications from designs - Familiarity with front-end technologies such as HTML, CSS, and JavaScript - Ability to work independently and as part of a team - Excellent problem-solving skills and attention to detail - Good communication skills to collaborate with the team and clients.

    €15 / hr (Avg Bid)
    €15 / hr Offerta media
    72 offerte
    Mobile Application 6 giorni left

    I'm looking to create an application with a presentation page, a four-step form including a finger signature. A profile space for the person who has registered and a page with four articles on it. I'll also need a chat button. And automate the sending of leads collected on a spreadsheet and CRM software.

    €608 (Avg Bid)
    €608 Offerta media
    86 offerte

    Introduction: Presentation of the project to create a website in WooCommerce aimed at offering personalized autobiographical books using ChatGPT, an artificial intelligence-based text generation model. Objectives: The main objective of the project is to enable users to create personalized autobiographies by providing specific information about their lives and experiences. The website will use this information to generate coherent, personalized narrative content. Main features : Customer information collection form: Creation of an intuitive, user-friendly form allowing users to enter relevant details such as their name, date of birth, key anecdotes, significant moments in their lives, etc. The information collected will serve as the basis for personalizing autobiographies. ChatGPT model...

    €532 (Avg Bid)
    €532 Offerta media
    71 offerte
    API coding Project 6 giorni left

    Hi, I need an API that will be able to connect to a database I have attached documentation for as well as to, as well a webform and finally our CRM, Velocify, for which I have a URL you can POST the information to. I am looking for someone who will be available to communicate throughout the project and have weekly meeting on the progress.

    €493 (Avg Bid)
    €493 Offerta media
    88 offerte

    I am in need of a Python developer to complete an existing Streamlit application or migrate it to a Flask Jinja2 or Django framework. The entire site consists of 8 pages and all backend services are already in place. I prefer to use Streamlit for this project. The specific features I need for the application include the creation of CRUDs and searches for the data consuming the backend APIs. I already have a design and 60% of the Application, so the developer will not need to create one from scratch. Ideal skills and experience for this job include: - Proficiency in Python programming - Experience with Streamlit, Flask Jinja2 or Django frameworks - Knowledge of backend services and APIs - Ability to create CRUDs and searches - HTML, Boostrap and JS are greatly appreciated to impr...

    €19 / hr (Avg Bid)
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    80 offerte

    I am looking for a developer to integrate a web3 wallet connect feature into my cryptocurrency platform. The ideal candidate should have experience with Metamask, Coinbase, and mobile wallets. Features and functionalities for the wallet connect integration are open to suggestions, and should be compatible with both mobile and desktop devices. Key requirements: - Experience with web3 wallet connect integration - Familiarity with Metamask, Coinbase, and mobile wallets - Ability to suggest and integrate features and functionalities - Compatibility with both mobile and desktop devices On desktop, the user must be able to open multiple tabs and not have issues. On mobile, if the user is in their mobile browser, they must be deep linked to their metamask or coinbase wallet. Once in their w...

    €477 (Avg Bid)
    €477 Offerta media
    68 offerte

    I need a web developer to fix my website's performance issues on Google Console. The ideal candidate should have experience with website performance optimization and be familiar with Google Console.

    €24 (Avg Bid)
    €24 Offerta media
    21 offerte
    Create react project 6 giorni left

    I am looking for a skilled React developer to create a basic website for me. Although I have a rough idea of what I want, I need help in refining it. I do not have a detailed design or wireframe, so the ideal candidate should have experience in design and wireframing. The website will require basic email and password user authentication.

    €70 (Avg Bid)
    €70 Offerta media
    46 offerte
    Work with website 6 giorni left

    I need worker's for this website:

    €374 (Avg Bid)
    €374 Offerta media
    37 offerte
    Website modifying 6 giorni left

    Do you know how to make this type of website:

    €32 (Avg Bid)
    €32 Offerta media
    16 offerte

    Project description: I'm looking for a skilled developer to create an add-on to integrate into my existing website, developed in HTML/CSS. The purpose of this add-on is to allow customers to place orders online and choose the pick-up option on site. Functionality requirements: User-friendly ordering interface: The add-on should include a user-friendly interface that allows customers to browse available products, select those they wish to order, and specify quantities required. Cart management: Customers should be able to add and remove items from their cart before finalizing their order. Smooth ordering process: Once customers have selected their products, they should be able to proceed to the next step to specify the details of their order (e.g., pick-up date and time). Online paym...

    €490 (Avg Bid)
    €490 Offerta media
    108 offerte

    I am urgently seeking a REACT with typescript coder for a one-hour project. The task at hand is advanced in complexity and requires expertise in the following skills and experience: Skills: - Proficient in REACT with typescript - Extensive experience in developing complex web applications - Strong knowledge of front-end web development, including HTML, CSS, and JavaScript Experience: - Experience in developing scalable, flexible, and user-friendly web applications - Proficiency in creating responsive web pages and integrating with APIs - Experience in working with Git version control system The expected outcome of the task is feature implementation. If you are a skilled REACT with typescript coder and can deliver quality work within a tight deadline, please submit your proposal. Budg...

    €7 / hr (Avg Bid)
    €7 / hr Offerta media
    15 offerte

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