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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    NEEDS TO BE DONE IN 10 HOURS. I need a developer to create a Science Fiction Portal site using HTML, CSS, Javascript, PHP and MongoDB. The project has very tight time constraints, so I'm looking for someone who can work quickly and efficiently. Key Features: - Discussion Forums: The site must have an integrated forum for engaging discussions related to science fiction. - Movie and TV Show Reviews: Users should be able to rate, review and discuss science fiction movies and TV shows. Design Preferences: - I envision a minimalistic and modern design for the portal. The site should be clean, easy to navigate and visually appealing. Ideal Skills and Experience: - Proficiency in HTML, CSS, Javascript, PHP and MongoDB - Previous experience in developing forums and review systems - Abili...

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    I need a developer to create a Science Fiction Portal site using HTML, CSS, Javascript, PHP and MongoDB. The project has very tight time constraints, so I'm looking for someone who can work quickly and efficiently. Key Features: - Discussion Forums: The site must have an integrated forum for engaging discussions related to science fiction. - Movie and TV Show Reviews: Users should be able to rate, review and discuss science fiction movies and TV shows. Design Preferences: - I envision a minimalistic and modern design for the portal. The site should be clean, easy to navigate and visually appealing. Ideal Skills and Experience: - Proficiency in HTML, CSS, Javascript, PHP and MongoDB - Previous experience in developing forums and review systems - Ability to work under tight deadlines...

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    Good evening, I need help with a Python assignment and I also need programming tutorials in java, Python, mvc, php, Javascript, mysql, jQuery, html, css, asp.net, c#. The tutorials would be in Spanish. I need them as soon as possible.

    €16 / hr (Avg Bid)
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    I'm in need of an experienced web3 developer who could integrate a wallet with my website on the Binance Smart Chain network. Key responsibilities: - Enable making transactions via the website, which includes: - Sending tokens - Receiving tokens - Approving transactions - Facilitate checking balances on the integrated wallet The ideal applicant should showcase a significant track record in web3 development, particularly in Binance Smart Chain integrations. Proficiency in working with wallets and facilitating seamless transactions is paramount for this project. A sound understanding of blockchain networks and their working will be immensely beneficial. Please only bid if you can make test directly on binance smart chain. we are going to use the Pi Network DeFi token to test...

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    I need to create a new layout for my system in Figma. It is a system based on React.JS

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    Detailed specifications and instructions accompanied by images are found in the following Google document:

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    I am in need of a custom HR Applicant Tracking System with key features including applicant tracking, interview scheduling, and a complete onboarding process. Ideal candidates will have experience in: - Developing HR software with a focus on applicant tracking - Implementing features such as interview scheduling and onboarding - Understanding of workflows and fields customization - Creating user-friendly systems for HR managers The system should be easy to use while meeting the needs of HR professionals. Please consider adding in your proposal any relevant experience you have in this field. Thank you.

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    I'm looking for a proficient programmer or web developer with experience in creating Chrome extensions for social media platforms. The main requirement is to generate tailored content for Instagram. - You should create a Chrome extension with the following features: - Template-based content generation: It should support text templates and also have the capability to overlay different texts over one video. - Text overlays: This feature is to add text over images or videos. - Mass production/download: This tool should generate content in bulk and allow for mass downloads. The ideal candidate for this project would have a strong command over JavaScript (for Chrome extension development) and experience dealing with various social media APIs. A strong understanding of content creatio...

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    I am looking for a software developer, with IoT experience, to create a MVP for an IoT Project related to smart buildings. The idea is to use an existing IoT platform on the market to facilitate development, which already has the structure ready and is easy to build, focusing efforts on customization. The platform is preferable, mainly because of the blueprints and starter kits that are ready and available for use there. More info about :

    €2375 (Avg Bid)
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    Java based app backend for tourism activities need 2 things. 1 - add a copy activity in activity page to copie a existing activity content to a new one 2 - migrate backend from vps centosOS to cpanel based hosting.

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    I require an proficient developer to create a script that can send out automated emails through Gmail. This task should be accomplished with an appropriate scripting language for Gmail's environment. Key Requirements: - Send out notification emails. - The notifications will be for scheduled reminders and service status updates. - Targeted audiences are all users and selected groups. Relevant skills include proficiency in JavaScript (as Gmail Scripts commonly employs this language) and familiarity with Gmail's API. Knowledge of handling scheduled tasks and interaction with user databases is also beneficial. In short, I'm looking for a coding and Gmail expert who can automate the process of sending important reminders and status updates to our users. The system should hand...

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    I'm seeking a skilled developer to build a trading bot for the Solana web3 infrastructure. This project involves: - Smart contract deployment - Token and wallet integration - Algorithmic trading bot development Your expertise should include proficiency in creating trading bots, with a deep understanding and prior experience in implementing auto-buy and sell features. Knowledge of trend following, mean reversion and breakout trading strategies is crucial for this role. Additionally, I expect familiarity with the Solana ecosystem to ensure seamless integration. Your input will be vital in positioning the bot precisely within the market dynamics.

    €1575 (Avg Bid)
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    Next JS - MongoDB Live Search 5 dní left
    OVĚŘENÉ

    I'm seeking a skilled JavaScript developer with experience in to assist with my current project. The task at hand involves integrating our front-end with MongoDB Atlas to create a live search bar for machine parts. Key Responsibilities: - Connect framework with MongoDB Atlas to enable real-time data retrieval for live search functionality. - Implement a user-friendly, intuitive search bar that allows for quick and efficient product searches. - Develop a product display page that showcases detailed information about the machine parts. Ideal candidates for this position should: - Be proficient in JavaScript and have prior experience working with Next.js. - Possess a solid understanding of MongoDB Atlas or a similar NoSQL database. - Have a keen eye for design and UX to ensure a sea...

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    JavaScript- PYTHON EXPERT 5 dní left
    OVĚŘENÉ

    Hello, I need a developer with a lot of experience in JavaSCRIPT EXPERT, Python and Socketweb - with the ability to create and solve problems with easy understanding of codes The rest of the details will be given to the correct developer

    €461 (Avg Bid)
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    I need an expert to implement and design a subscription system in Listivo that separates subscriptions by categories. This will serve to better organize the subscriptions, offering a more streamlined experience. Key Tasks: - Develop a system that identifies distinct categories within the subscriptions page like Listivo dose on the packages page. - Implement the categorization within the Listivo interface You will see in the first attachment circled in blue in on Packages page , I need the same on Subscription page the other photo. Ideal Freelancer: - Exceptional experience in subscription system creation and development - Prior experience with Listivo and its functions - An eye for detail and organisation, ensuring a simplified and efficient user experience T...

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    I require your expertise for an end-to-end testing of my Ruby on Rails application. Inclusive of all the components, which are Models, Controllers, and Views. Knowledge and usage of MiniTest, Simplecov, and Capybara for the testing frameworks are also required for this project. Key features for testing: - User Authentication - Database Queries - Form Validation The ideal candidate would be someone experienced with Ruby on Rails applications, fluent in the use of multiple testing frameworks, and specializes in identifying and rectifying potential pitfalls.

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    I'm looking for an intermediate-level Node.js developer who can help me in building a server-side API and real-time applications. Key Responsibilities: - Develop server-side API: You will be responsible for creating a robust server-side API that can handle data requests efficiently. - Build real-time applications: You should have experience in developing real-time applications that provide seamless user experience. Ideal Skills and Experience: - Hands-on experience with Node.js and server-side development. - Familiarity with real-time application development. - Proficiency in using frameworks like , , and will be a plus. - Prior experience in building scalable and performant applications. - Intermediate level of experience and expertise in Node.js development. If you have the ri...

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    I am seeking a web designer who can refine and improve the layout of the included CX Navigation Script. - Skillset: Proficiency in HTML and Java is a must-have. - Design: The project entails taking the existing HTML design attached and improving its functionality via a combined/redesigned menu bar. Creating a more modern, clean, and user-friendly design that reflects a minimalist aesthetic. Along with adding the below improvements. Birthday Pop Up (Modal/TBD): Currently titled as (openpop1) to be triggered upon selecting the “Caller is verified” #button# in the “Inbound Opening Call Script”. If the requirements are met that are currently in the script then it should populate on the screen. However, the end user should not have to interact with the pop up to make...

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    python flask an java EXPERT 5 dní left
    OVĚŘENÉ

    Hello, I need a developer with a lot of experience in Java, Python and Socketweb - with the ability to create and solve problems with easy understanding of codes The rest of the details will be given to the correct developer

    €128 (Avg Bid)
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    I need to create new functions in a system based on React.JS, Java Script

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    Low-Code Developers Wanted 5 dní left
    OVĚŘENÉ

    We are need of developers proficient in low-code platforms to create a suite of applications. Firstly, we will need a web application, a mobile application, and an enterprise application developed. These are crucial tools for our business operations and customer interactions. In terms of functionalities, I require the following: - User authentication: The applications should have a secure login system. - Data storage and retrieval: The ability to store data and retrieve it when needed. - Integration with third-party APIs: Seamless integration with external APIs is a must. I'm expecting a relatively small user base initially, but these applications should be scalable and able to handle growth. Ideal candidates would have: - A strong background in low-code development - Experience ...

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    Web CTF Project 5 dní left

    Hey, I'm looking for someone who could able to help me in CTF. I need to. you analyze all the code soon. Preferably I am in need to Cyber Security expert. For more, We can discuss via chat. Thank you

    €22 / hr (Avg Bid)
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    More details: What specific functionalities do you want for your Shopify website? Custom theme development, Responsive design, Integration with third-party apps Do you have a design or wireframe for your website? Yes Do you have a preference for certain third-party apps to be integrated with your website? This question was skipped

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    I want to scrape daily leads from LinkedIn Jobs, Indeed Jobs, , etc. The task involves extracting data from these job sites and exporting it to Excel sheets. It would be preferable to have some kind of automation that reduces human dependency in obtaining leads every day. If someone has already set up a similar process before, I would prefer that. Preference will be given to those who have previously performed lead extraction tasks for recruitment websites.

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    hola tengo la programación hecha y seria solo poner en el html5 la cantidad de productos de cada categoria al lado. <li><a href="">Todos los arneses <span>(?)</span></a></li> <li><a href="">Arneses huecos <span>(?)</span></a></li> Por favor solo seria tocar el php gracias.

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    I aim to develop a web application that is centered around the generation of test cases from data flow graphs. This tool is primarily intended for software developers and will be used to aid in the effectiveness of testing processes. Key Features: - Capable of analyzing data flow graphs to generate test cases - Simplistic, user-friendly interface designed for software developers - Incorporation of Java programming language for analysis The ideal candidate for this project should have: - Proficiency in web application development - Strong understanding of data flow graphs and test case generation - Excellent command over Java programming - Previous experience in creating tools for software developers This project is a great opportunity to contribute to the efficiency and productivity of ...

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    Aplicativo TSX 5 dní left

    Preferencia para pt-br. Projeto de venda , preciso de auxilio para integração da api de pagamento, auxilio de envoltura de login (armazenamento de situação de login, usuário logado ou não logado) e estoque, tenho toda estrutura pronta e funcional em outras partes já. Coloquei preço baixo mas nada que pode ser negociável, pois pode ter mais coisas a se fazer.

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    I have a Flutter template that requires several adjustments. - UI Customization: I need the color scheme modified and the layout rearranged. The goal is to create a more user-friendly and visually appealing interface. - Functionality Modifications: The template needs improvements in user authentication, database integration, and push notifications. Experience in these areas is critical to effectively implementing these changes. I'm looking for a skilled Flutter developer who can help me make these adjustments in a timely manner, so please only apply if you have demonstrable experience in this area. Please provide your pricing structure and availability.

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    3D Video Script Development 5 dní left
    OVĚŘENÉ

    I'm in need of a script that can produce a 3D flipbook video similar to the one I've provided. The script will take source images and render them into a 3D video using , Python, PHP or any other solution Requirements: - Development of a script that can process images into a 3D flipbook video - Experience with framework is preferred - Ability to understand and replicate the style and functionality of the provided reference video - Past work in similar projects is necessary, so make sure to include this in your application If you're interested, please contact me for more information.

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    I am looking for a web design who will convert our website content to a new template. We have both the template, it has 10-15 pages. Original Website: Template: Looking for someone who can do this withing 7-10 days. Budget is limited, bid accordingly. If you have any question send me a document with your question.

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    Robinhood Trading Bot Overhaul 5 dní left
    OVĚŘENÉ

    I'm seeking an expert in bot development, with a specific focus on financial trading. Your task will entail adding functionality to an existing trading bot, designed to interact with the Robinhood app. Key Requirements: - The bot should operate based on user conditions primarily, with a minor reliance on its built-in algorithm. - After identifying a high point, the bot should immediately sell. - Conversely, after determining a low point, the bot should buy. - The bot needs to establish these high and low points based on a combination of news, average, and RSI factors. Ideal skills and experience: - Proficiency in the programming language/s used by the existing bot - Deep understanding of stock market functionalities - Proven experience in financial algorithm development - Familiari...

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    I have a loading bar that needs to function as a progress bar. I've used GSAP for the rotation animation on the loading bar, but it is not working. It seems to be a technical issue and I suspect it's due to my lack of GSAP knowledge. I need a developer who can help me troubleshoot this and get it working. Key Requirements: - Troubleshoot the GSAP rotation animation on a loading bar - Ensure the loading bar functions as a progress bar - Identify and rectify any technical issues causing the animation to not work - Provide clear documentation on the solution Ideal Freelancer: - Experienced with GSAP and animation - Proficient in JavaScript and front-end development - Strong troubleshooting skills to identify and fix the issue - Good communication skills for clear documentation

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    I need some Android developer for some easy tasks I need work at low budget I need coder from Pakistan or India

    €5 / hr (Avg Bid)
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    As a client, my primary focus is on creating a unique social networking site that will revolutionize the way people connect. I'm in search of a full stack web developer with a vision and a passion for innovation to help me bring this idea to life. This project is not for the faint-hearted; it will involve breaking barriers and creating something entirely new. Key Functionalities: - User Profiles and Accounts: The site will need to allow users to create and manage their profiles. - Messaging and Communication Features: It should include real-time messaging, group chat capabilities, and possibly video/voice calls. - Content Sharing and Posts: Users need to be able to share a variety of content like text, images, videos, and more. - Plugin Integration: The successful candidate will need...

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    I'm seeking a proficient JavaScript developer to modify my existing Js code - Expertise in JavaScript, - - Proven track record in delivering projects in a timely manner, as I require the completion of this modification as soon as possible. Your ability to start immediately will also work to your advantage in this project selection.

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    I need some Android developer for some easy tasks I need work at low budget I need coder from Pakistan or India

    €7 / hr (Avg Bid)
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    I'm looking for an experienced developer to create a custom Chrome extension for me. This extension will be a dark mode tool, allowing users to convert any webpage to dark mode and vice versa. Additionally, it should have the following features: - An auto mode that toggles automatically between light and dark mode from 7:00 PM to 7:00 AM - A page brightness toggler, allowing the user to adjust the brightness from 0% to 100% - An option to whitelist any web page and manage the whitelist - A one-time payment option - A designated area for logo positioning Ideal skills for this project include: - Proficiency in Chrome extension development - Experience with dark mode implementation - UI/UX design skills for the logo positioning - Knowledge of whitelisting functionalities in Chrome exte...

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    I'm looking for a talented individual to build a data dashboard that will display our procurement spend data in a user-friendly and visually appealing way. Key Requirements: - Display Procurement Spend Data: The primary focus of this dashboard is to showcase our procurement spend data, broken down by different categories. - Manual Data Update: The dashboard should be updated by uploading files manually. Ideal Skills and Experience: - Prior Experience: I'm looking for someone who has previously built data dashboards, preferably ones that deal with procurement or financial data. - Data Visualization: Understanding of how to best present data in a simple, yet informative manner. - Tableau or Similar Tool Proficiency: Experience with tools such as Tableau that can integrate data ...

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    E-wallet web 5 dní left

    web-site that can be used for transaction (both sending and receiving) that have both P2PE and BAN logic.

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    I'm in need of an expert developer with a keen understanding of PHP, Heroku, and Shopify. This project entails the deployment of a Heroku server where my API key will be secure and stored in an environment variable. You'll also need to utilize this Heroku-based API key on my Shopify platform to access and display user data through API calls. Ideal Skillset and Experience Required: - Proficiency in PHP - Expertise in deploying and managing Heroku servers - Understands how to secure API keys on Heroku - Experience with Shopify API integration and displaying data.

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    I'm in need of an experienced individual who can assist me in creating a system to prefill application forms on a website. Here are the specifics: - You'll be working on automating the prefilling of the application forms. The form type in question are specifically application forms. - The prefilled information will be sourced from user inputs on a previous page. This is essential for seamless user experience. Ideal candidates for this project will have: - Proficiency in web development and form automation - Experience in working with application forms prefills - A keen attention to detail for accuracy in prefilling - Excellent problem solving skills to address any unforeseen issues Please reach out if you're confident in your abilities to deliver on this project.

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    I'm looking for a competent Java developer to assist with the development of several data structures and algorithms. In this project, you will conduct a set of experiments to compare the performance of dictionary implementations that use unsorted arrays vs. sorted arrays. You are given the Dictionary interface () and its implementation class (). In addition, the file contains a list of 10,000 key-value pairs that represent certain measurements. Key Skills: • Expertise in Java programming • Extensive experience with diverse data structures and algorithms • Ability to adapt to fluctuating project requirements Your ability to create powerful, flexible systems with Java will be crucial for this undertaking. Though the specific application hasn't been set, your ver...

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    My project is centered around building a lively, vibrant community website for individuals battling depression. Here are the features required: - A forum for discussions: This crucial feature will let users engage in public conversations, sharing their concerns, triumphs, and support each other. - An Anonymous chat room: Here, members can engage in private and secure chats, providing a safe haven for expressing themselves without fear of judgment. - Resource directory: This will serve as a hub for sharing valuable materials and resources that can help in different ways. - Video chat: Similar to Omegle, this will enable one-on-one interactions via video, promoting stronger bonds among the community members. - Personalized sign-in/sign-up functionality: This unique feature will lend a p...

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    As a client, I'm in need of a skilled ReactJS developer with no less than 10 years of experience in the field who can help me develop a new web application from scratch. Essential Skills: - In-depth knowledge of React Component Development - Proficiency in Redux State Management - Experience with React Router Navigation The perfect candidate for this role should be well-versed in additional tools and technologies such as: - GraphQL - TypeScript - Jest testing framework. The main objective of this project is to build a robust and dynamic web application that meets our specific requirements and standards. Your role will be pivotal in designing, creating, testing and implementing this web application. So, if you're up for a challenge and willing to dedicate your time and skill...

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    Hello, I need a developer with a lot of experience in Java, Python and Socketweb - with the ability to create and solve problems with easy understanding of codes The rest of the details will be given to the correct developer

    €461 (Avg Bid)
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    I'm looking for a skilled developer who can help me customize the Colibrism PHP social network script. Key Requirements: - Experience with PHP and social network development. - Ability to work with Colibrism's source code and make necessary modifications. - Understanding of user profiles, authentication, and social media integration. - Capable of implementing basic social networking features. This project could be an exciting opportunity for someone who is familiar with PHP and social networking development. The ideal candidate should be able to understand the structure of Colibrism and implement modifications to suit my specific needs.

    €23 (Avg Bid)
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    I am looking for a web developer to create my portfolio. I have a specific style or theme in mind and would like the freelancer to come up with a unique style or theme. The portfolio should have 4-7 pages. Ideal Skills and Experience: - Web development - Design skills to create a visually appealing portfolio - Knowledge of HTML, CSS, and other relevant web development languages - Ability to create a responsive design for different devices - Experience in creating and optimizing web pages for fast load times

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    PHP/MySQL Development 5 dní left
    OVĚŘENÉ

    I'm urgently seeking a proficient PHP/MySQL developer to tackle several key tasks for my project. Although I chose to skip specifying the exact functionalities, the developer should anticipate working on tasks such as: Work on 45 pages, each very simple. There are 3 main page features: 1. View table from DB 2. Create new record in that table 3. Edit record in that table Most the pages are the same, just a different table. A few tables have some other functionality but it's all very easy. All html design has been done already, you just have to add some PHP/MySQL code to make the pages work with the database. You also need to create the DB, table and records. Though most have been created already. You would need to double check them though. I also need the web services t...

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    My web-based application is facing a critical issue that needs urgent fixing. The specific problem is functional, as the application is currently unable to connect to the database, which is affecting the user profile loading feature. This is a high priority task that needs immediate attention. Key Tasks: - Fix the database connection issue - Ensure the application can load user profiles seamlessly Ideal Freelancer: - Proficient in web-based application development - Experienced with database connectivity issues - Able to work under pressure and deliver quick results - Strong problem-solving skills and attention to detail.

    €145 (Avg Bid)
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