Ajax, or Asynchronous JavaScript and XML, is a powerful development technology used to create faster and more dynamic web applications. This means that an AJAX developer or engineer helps businesses create the most responsive web experiences for users. Through its interaction with the server, AJAX can improve the performance of web applications, aiding in loading time and overall responsiveness. With Ajax, web developers can create complex user interfaces from multiple data sources that use far fewer resources than traditional web-based applications. Ajax-enabled applications also tend to be more accessible, being compatible with a wide range of browser technologies such as HTML, CSS and JavaScript.

An AJAX Developer's expertise helps to build look attractive but simple user interfaces. They take complex application architectures and make them simpler for users by defining how to collect data from different sources and how to display it in a unified interface. They also make sure that their applications are device-independent and compatible with their intended devices.

Here’s some projects that our expert AJAX Developers made real:

  • Creating login pages quickly and securely
  • Building hotel websites with powerful API integrations
  • Designing efficient user interfaces to enable sorting of posts
  • Facilitating likert scale forms using modern frameworks
  • Developing single pages using databases, PHP, and libraries like Handsontable
  • Constructing efficient digital download scripts using core PHP
  • Expertly uniting CSS, Bootstrap, MySQL, AJAX, and JQuery
  • Crafting easy Shopify buttons for adding subscription products

Freelancer has the perfect AJAX Developer for your project needs. Having someone on-hand who is knowledgeable in asynchronous request handling makes online experiences smoother for everyone involved. From simple page elements right through to complex application architectures, an expert AJAX developer can bring your website ideas to life. Why not post your project today on Freelancer and get started on your way to improved website performance?

From 277,834 reviews, clients rate our AJAX Developers 4.85 out of 5 stars.
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    I'm looking for an expert in PHP and MySQL to create a detailed audit trail. This trail needs to capture changes for both text and numeric fields. Purpose is to record the old data and new data for each modification. Key features: - Ability to view a detailed history of all changes - Implementing user identification tracking for each field Your experience with similar projects will be crucial for the success of this task. Good understanding of data privacy and security is needed. If you're precise and detail-oriented, please bid here.

    $32 (Avg Bid)
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    Hi, Could you please let me know if you can help me bring the functionality I described (including displaying quantity, updating cart automatically, showing options for pre-orders, sync product etc.) using WordPress and WooCommerce? What would the approximate cost and development time be for each design? I have a Figma design ready to share once we start development. You may also preview it by visiting this link: or in the attachment below. Thank you!

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    I've got a website, installed WooCommerce Brands plugin, woocommerce plugin and Twentytwentyfour theme, the website contains many product categories level 1,2, and many Brands level 1,2 (including many categories level 2 have the same name, just different category level 1). I want a Plugin with the ability to filter products based on 2 fields: Product Category and Brand. These two fields are designed as 2 ajax search boxes to find categories, classified into levels 1 and 2. And a search filter button, once the categories in the 2 search boxes have been selected, the user presses the "Search Filter" button to find satisfactory products belonging to both categories and Brands. At the same time, the Plugin can generate shortcodes and PHP code so I can insert it anywhere on th...

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    WHATSAPP API INTEGRATION 5 days left
    VERIFIED

    We want to integrate WHATSAPP third-party api integration to send messages from our existing web java based application. 1. Upon of user signup, as a confirmation message we need to send whatsapp message to the registered number. 2. Verify if the number is whatsapp number before sending message.

    $165 (Avg Bid)
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    I'm seeking a seasoned developer, adept in PHP, Ajax, jQuery, and MySQL, to create a questionnaire form builder. Key features should include: 1. Storage: The capacity to store all form responses in a database for further analysis. 2. Question Variety: The form should be capable of handling a large number of questions, with a mix of single text fields, paragraph fields, multiple choice (dropdown, checkbox, radio), image upload, video upload, terms & condition agreement checkboxes and digital signature input. 3. The ability to customize each questions settings-- whether it's a required field, whether the question is public or internal only. 4. A responsive interface where questions in the questionnaire can be re-odered by dragging them. Ideal freelancers would have ...

    $1771 (Avg Bid)
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    I'm seeking a proficient PHP developer willing to undertake both front-end and back-end development for my project. The professional needs to rewrite the code for my admin panel found at following a performance-based approach. Key Responsibilities Include: - Front-end Development: Creating interactive and efficient user interfaces. - Back-end Development: Utilizing PHP to ensure server-side application logic. - Database Management: Already implemented Ideal Skills: - Proven experience in front-end and back-end PHP development. - Proficiency in PHP without relying on frameworks.

    $177 (Avg Bid)
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    I'm looking for an experienced JQuery JavaScript programmer who can implement dynamic content loading for my project. Key Features Required: - Dynamic Content Loading: This will be an essential part of the job, you'll need to be confident with handling this on a regular basis. Our project is server-side, so the dynamic content will be generated there. Data format preferences were not specified, so a freelancer with knowledge in JSON, XML and HTML will have an advantage, as that flexibility could be beneficial. Ideal Skills: - Extensive experience with JQuery JavaScript programming - Proficiency in Dynamic Loading techniques - Familiarity with generating content server-side - Knowledge of JSON, XML and HTML A seasoned developer with these skills could really help drive this...

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    I am looking for a .NET Core full stack Sr developer with experience in Entity Framework and Angular. The project involves enhancing an existing application. The timeline for completion is ongoing. Skills and experience required: - Strong proficiency in .NET 6 - Extensive knowledge of Entity Framework - Proficiency in Angular framework - Experience in enhancing and maintaining existing applications - Ability to work independently and meet project deadlines.

    $12 / hr (Avg Bid)
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    I'm seeking a skilled PrestaShop developer with experience in customizing existing online stores. In short: is necessary to add "step quantity" functionality for prestashop cart. e.g: step 3 (6,9,12... etc) for quantity Is good to have knowledge about javascript, jquery, ajax, npm PROJECT REQUIREMENTS - products listed in catalog already have a attribute in input quantity line called "step" e.g. <input type="number" step="3" value="3 ">. Is necessary when product is added in cart, to keep this step value when modify quantityes .e.g. 3,6,9 .... is must when we change this quantities from cart by step, the value of cart to be updated in real time (like native script). This functionality is require to work on both carts: late...

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    The website should work smoothly on both desktop and mobile devices and have a modern design. The website should offer a platform where users can easily register, manage their accounts, deposit and withdraw funds, and buy and sell bitcoin (tokens). The website should be able to display current market data, charts, analysis and news and offer users different trading strategies. The website must comply with the highest standards in terms of security and protect users' personal and financial information. The website must have SSL certificate, two-factor authentication, encryption, cold storage and other security measures. The website should offer an affordable and competitive commission rate and offer users a choice of different payment methods. The website should support credit card, ba...

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    Necesito desarrollar una aplicación PHP PURO MVC, javascript, ajax, mysql, bootstrap para gestión de trámites documentarios. La aplicación debe permitir: 1. Crear expedientes externos (Público o ciudadanos) permitir adjuntar archivos 2. Crear expedientes internos (empleados). Permitir adjuntar archivos. 3. Realizar seguimiento a los trámites 4. Crear áreas de la empresa (ej. Atención al cliente, recursos humanos) 5. Registrar los empleados y vincular con una área 6. Crear usuarios para los empleados 7. Un trámite puedes permitir las acciones: derivar a otra área, atender, rechazar, finalizar. 8. Al crear el expediente (trámite) se debe notificar al correo de quién radica el trámite. 9. Crea...

    $31 / hr (Avg Bid)
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    I'm in need of a seasoned PHP developer to create a single controller function alongside its view component. This function's primary responsibility will be to manipulate data based on user interaction with our website. **Core Requirements:** - **Data Manipulation:** The function must adeptly modify data in response to specific user actions. - **Trigger Mechanism:** This manipulation will be initiated when a user clicks a particular button on our site; precise execution upon this action is crucial. - **Interface Design:** While the focus is on the backend, a basic yet functional button on the interface should be integrated to trigger the process. **Ideal Skills and Experience:** - Proficiency in PHP, particularly with data manipulation tasks. - Strong understanding of user inter...

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    I'm seeking a seasoned CodeIgniter developer to enhance my current project. The enhancements required include user authentication and authorization mechanisms, performance optimization, and integration with third-party APIs. The project currently suffers from slow page load times, a lack of scalability, and some bugs that need fixing. Specifically, extra fields and functions which can be any type such as text, date or dropdown need to be added. I envision this as a long-term collaboration that goes beyond this project. The ideal candidate for this role should have substantial experience with CodeIgniter, Performance Tuning, API Integration, and Database Management. An excellent understanding of user authentication, authorization, and web optimization techniques is also necessary.

    $37 (Avg Bid)
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    I'm seeking an experienced web developer to create a sophisticated courier tracking website that integrates live GPS tracking to cater to delivery personnel, customers awaiting their packages, and logistics managers. The essence of this platform is to enhance operational efficiency and customer satisfaction by providing real-time visibility into courier movements and delivery statuses. **Core Requirements:** - **GPS Tracking Integration:** Implement a reliable GPS tracking system that captures and displays the real-time location of couriers to all users. - **User-Specific Interfaces:** Develop tailored interfaces for different user roles: - **Delivery Personnel:** Access to route optimizations and nearby delivery notifications. - **Customers:** Ability to track their packages in...

    $706 (Avg Bid)
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    DO NOT BID - I am aiming to significantly improve user experience on my website through a navigation overhaul. The end goal is to create a responsive design that is both intuitive and user-friendly.

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    Matka Gaming Site Development 14 hours left
    VERIFIED

    I am on the lookout for a proficient web developer experienced in designing gambling websites. The prospective developer will be required to design an online matka website with meticulously detailed features such as single digit game, double digit game and Jodi game. Essential Skills and Experience: - Proven experience in designing gambling or gaming websites - Ability to create unique, user-oriented web design Key Deliverable: - A fully functional online matka website with the mentioned games Application Requirement: Freelancers applying should provide a detailed project proposal, including the layout, timeframe, cost estimation, and how they plan to meet the requirements of this project. User Interaction: The website should offer a high level of user interaction such as user accou...

    $162 (Avg Bid)
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    I am in need of a proficient developer, specifically experienced in Core PHP and AJAX, to incorporate dynamic content loading functionality into my platform. Experience in this combination of tech stack is highly valued. Desired Functionality: - Dynamic content loading with AJAX: This is essential to the project. Please note, the exact types of content and the specific purpose of implementing dynamic content loading have been left open. I welcome your professional input on this and look forward to discussing your experience and ideas. The result should produce a more interactive, engaging user interface and potentially load pages faster. Ideal Skills: - Expertise in Core PHP - Extensive Knowledge in AJAX - Familiarity with interactive elements and widgets - Experience with UI/UX desig...

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    Otorgamiento de margen de dinero ($) para compra de medicamentos. -) El usuario Administrador (control y acceso a todo, por ejemplo: agregar/modificar/eliminar usuarios, acceso a la carga del usuario 1, usuario 2, etc). -) El usuario 1 cargará los siguientes datos: Legajo (es número de cuatro dígitos que sirve para identificar a cado uno de los empleados/as), Apellidos - Nombres, Margen ($) y Fecha de Nacimiento (la fecha de nacimiento servirá así el sistema calcula automáticamente lo siguiente: • Varones: color verde los que cumplen 64 y en rojo los que cumplen 65 (a los usuarios que cumplan 65 años no se le puede otorgar el margen), ya que se jubilan a los 65 años. • Mujeres: color verde las que cumplen 59 y en rojo ...

    $241 (Avg Bid)
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    Otorgamiento de margen de dinero ($) para compra de medicamentos. -) El usuario Administrador (control y acceso a todo, por ejemplo: agregar/modificar/eliminar usuarios, acceso a la carga del usuario 1, usuario 2, etc). -) El usuario 1 cargará los siguientes datos: Legajo (es número de cuatro dígitos que sirve para identificar a cado uno de los empleados/as), Apellidos - Nombres, Margen ($) y Fecha de Nacimiento (la fecha de nacimiento servirá así el sistema calcula automáticamente lo siguiente: • Varones: color verde los que cumplen 64 y en rojo los que cumplen 65 (a los empleados que cumplan 65 años no se le puede otorgar el margen), ya que se jubilan a los 65 años. • Mujeres: color verde las que cumplen 59 y en rojo...

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    La idea es hacer una aplicación Android similar a BlaBla Car en el sentido de cobrar un X de comisión al vendedor, todos los usuarios podrán comprar/vender, pudiendo así calificar con un voto positivo/negativo al usuario, esta aplicación será solamente para una categoría, quiero decir, no se usará para todo tipo de productos, todo lo contrario, para uno especifico.  Es necesario que como Wallapop haya disponible un chat para que pueda hablar el comprador y el vendedor, este tendrá una revisión para que no hagan negocios fuera de la aplicación, el cliente al pagar por el producto los administradores retendrán el dinero hasta que el cliente de el visto bueno de la entrega, si todo ha ido bien el dinero ...

    $12917 (Avg Bid)
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