JavaScript Jobs

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!

From 700,368 reviews, clients rate our Javascript Developers 4.86 out of 5 stars.
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    653 jobs found, pricing in CAD

    I need an expert to develop a text-based captcha system for my website. The captcha should be of moderate complexity, providing enough background noise to deter bots but not so much that it frustrates real users. Ideal length for the captcha would be in the range of 7-9 characters. Key Skills: - Experience in captcha systems development - Proficiency in web development languages - Understanding of usability and user experience considerations The goal of this project is to balance usability for real users while preventing bots from abusing our site. Open to discussions on the approach, but the final product should meet the requirements specified.

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    I'm in need of a competent React & Node.js developer who will set up an e-commerce website for testing purposes with certain specific functionalities as outlined below: - Integration of E-commerce Functionality: The developer should be able to set up an e-commerce platform, complete with product listing, shopping cart, and checkout functionality. - Integration with Third-party APIs: This involves setting up APIs to allow smooth data exchange between the website and other applications. - Implementation of an Order Tracking System: This system should provide static updates to customers about the progress of their orders. - Design of Payment Option: I'm looking for a minimalistic and clean design for the payment option interface. Ideal Skills: - Proficiency in React.js &...

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    As someone undertaking a Javascript project, I am in need of a talented individual with ample experience in this field. Unfortunately, I cannot provide specifics on the tasks at hand as that section of the inquiry was skipped, but the undertaking will likely include debugging, adding new features, and/or refactoring Skill requirements: - Broad and nuanced familiarity with Javascript - Proven ability to adapt to and overcome new challenges, as exact task details are currently unspecified - History of results-based performance in Javascript roles JavaScript fluency is mandatory but there's no need for proficiency in any particular framework. We will be dealing with simple HTML code. I'm looking forward to your application!

    $2 - $2 / hr
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    I urgently need a skilled Full-Stack PHP Developer who can assist with frontend and backend development, as well as database management, of an AI SaaS built on the WordPress framework. - Experience with OpenAI API & Streaming is a MUST! - Frontend Development: You should be proficient in WordPress and Native PHP. Your tasks will include creating interactive, responsive designs that enhance user experience and drive engagement. - Backend Development: Expertise in Native PHP and WordPress is highly valued. You'll handle server-side application logic, design robust APIs and optimize the system for speed and scalability. - Database Management: You'll be responsible for data storage solutions, ensuring data consistency, data protection and making certain the system performs e...

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    I am seeking a skilled mobile app developer to create a soccer-centric application for Android. This engaging app should feature: - Live scores: Keep users in the loop with real-time scores. - Betting integration: Seamlessly integrate with external sports betting platforms. Prior exposure to similar integration appreciated. - Club and Player Statistics: Display comprehensive data about soccer clubs and individual players. This project demands a strong understanding of sports betting systems and a passion for soccer. The ideal candidate will have a history of developing apps with similar functionality. Knowledge of live score updating features and sports statistics is a plus.

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    a seacurity issue so i need a bangladeshi freelancer he can about bangladesh payment methode

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    I am looking for a skilled Python and Vue.js developer to make several changes in an existing project. Key Responsibilities: - You'll be responsible for reviewing the current project and implementing a series of modifications that I have already ranked in order of importance. - You'll also need to make adjustments to the user interface as a part of these modifications. Ideal Skills and Experience: - Proven experience in Python and Vue.js - Expertise in UI/UX and be able to make needed changes - Ability to understand and implement modifications as per given preferences. Your understanding of Python and Vue.js will be highly important for this job. The project needs a subject-matter expert who has carried out tasks of this kind in the past. Strong familiarity with the UI/UX in...

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    Indian Candidates will be preferred who are able to connect Asap. I'm in search for a consummate professional who has proven experience with NextJs, Shopify, React, Hydrogen, and headless storefronts. Especially, this candidate should also have a good grip on Shopify's Liquid template language. For this project, you will be responsible for downloading and decoding my Shopify theme to enable the customization and operation of headless eCommerce platforms. Concrete knowledge of the following is preferred: - Familiarity with Shopify's customer management API. - Ability to create customer login and authentication on a headless storefront. Regarding design, I already have one in mind, and I expect you to turn it into reality using your expertise. However, we skipped the qu...

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    Javascript code to escape Instagram embedded browser to Safari on iOS, automatically redirect

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    I’m in need of a PHP developer to create a specialized system for an academic institution, with an expected user base of more than 100 participants. The system requires capabilities in: - Timetable planning - Scheduling - Report generation Regarding user roles, the system should allow differentiating access and permissions for: - Administrators - Students - Teachers - Courses coordinator - Course category administrator Specific features of the software include: • Academy Levels: Supports four levels, namely foundation, elementary, final, and graduate. • Interactive Timetable: Users can add and edit schedules interactively using convenient methods such as drag-and-drop. • Sections and Courses: The system enables the addition and management of unlimited sections per...

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    We are looking for working professionals who are looking to mentor coding one-on-one over the weekends and make some side income. Requirements: 1. Be really good at DSA 2. A good ability to mentorship 3. Great communication skills 4. Working at a high growth startup or a reputed company You can set your own hourly rate and get paid for teaching your skill to students and helping them out in their careers.

    $15 / hr (Avg Bid)
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    Issue with payment gateway 6 days left
    VERIFIED

    We have issue with already setup payment gateway since few days the setup was working earlier a developer who did some other work stated that the issue is with razor pay side but razor pay need to produce it rightly. We are looking for those with expertise in PG and specifically in Razor pay to look into the matter

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    I need an experienced developer to help with some design updates and functionality improvements on my website. The specific tasks include: - Rearranging website sections for better user experience. The ideal candidate will have a strong understanding of React.js and , proficiency with MongoDB, and a keen eye for design and layout. Experience with website layout optimizations is highly desirable. This project requires a fast turnaround, so efficiency and time management skills are crucial. Reach out if you can help transform my website with these enhancements.

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    ISO of expert coder who can debug a scheduling app for a vendor market built in on Vercel using Typescript, MongoDB, Stripe API, Sendgrid, Cloudinary, etc. Looking for success where others have failed to deliver. Not rocket science, but fairly involved proprietary app.

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    I'm looking for a skilled developer who can create a Telegram bot capable of managing multiple domains for me. The bot's duty would be to monitor the websites' state via three simple APIs(also checking downtime state and response time), with the ability to send different notifications as Telegram messages to the subscribed users. The frequency of alerts and other variables should be customizable. The bot should have UI menu to manage (add, delete domains, change customized variables, mute notifications for some domains or change monitoring mode) Alerts should be dispatched at specific times and also triggered by certain events. Experience with Telegram bot programming, API integration, and alert systems is essential. Key Requirements: - Monitor multiple websites' ...

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    I'm searching for a competent PHP developer who can assist me in modifying some Code Canyon scripts. I did not specify which scripts for this project, giving you the flexibility to apply based on your wide-ranging experience in PHP script modification. Main Task: • Modify various Code Canyon PHP scripts as per requirement. The ideal freelancer for this job should have: Relevant Experience: • A strong track record of modifying PHP Scripts, preferably but not limited to, CodeCanyon scripts. Your application will stand out if you share specific examples of your previous work in this area. • Experience in a related industry would be a bonus. In your application kindly focus on your: • Experience with PHP and script modification. This project could lead to multipl...

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    For an expertly built website, I seek a skilled React developer, who can effectively improve the performance of my site. You can check the current performance of my site here: The winner will be selected by the following criteria: 1. the first one who reaches a performance of 100 gets the price 2. if no-one reaches 100, the one with the highest number gets the price Instruction to participate the contest: 1. get the code at 2. create an own branch with your name 3. make your changes 4. push the code 5. on freelancer.com submit a picture of your main changes 6. get the price :-) looking forward to your ideas

    $204 (Avg Bid)
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    I need a proficient Nextjs GraphQL developer to create a simple app extension for my Shopify store. The functionality I require is focused around product catalogue management, specifically: - Ability to fetch and update specific product data via GraphQL - Display the fetched data within the app in a list format - The fetched data should also be used to add a search functionality As for how the data is displayed, I would prefer a table view to best fit my workflow. Freelancers who've worked with Shopify's backend and have experience with GraphQL are preferred. Competency in creating user-friendly interface designs is also a plus. Potential candidates must demonstrate a clear understanding of eCommerce data management and the efficient implementation of these systems.

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    I have a script with 2 function (see top picture), i need to replace with the 2 function on the bottom picture and have it install on my server It's a github script

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    We are looking for an experienced developer to create a web application that will allow users to communicate with existing virtual characters in our catalog in the form of AI chat, as well as create their own by providing detailed prompts similar to ChatGPT. We see integration with the OpenAI API as the primary means of generating dialogues, but we are open to considering alternative options. Most likely, in the future, we will move towards a more specialized solution. We consider the project as an example of what we aim to achieve. Requirements: - Development of standard web application functionality, including a database for storing dialogues and user information, authentication, payment systems (Stripe, PayPal, etc.), catalog search, email notifications, and logging. - The site shou...

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    I'm seeking a seasoned web developer to build an advanced lead generation website, capable of efficiently collecting specific visitor's information. Key tasks and requirements include: • Integration of multifunctional data collection forms which will request: - Visitor's name - Email address - Phone number - Their departure and arrival city - Service type • Implementation of advanced website functionalities such as: - A multistep form for visitor inquiries The ideal candidate should have extensive experience in web development, with a specific focus on lead generation platforms. Expertise in integrating dynamic forms and functionalities on a website is a must. Your ability to deliver an easy-to-navigate, efficient, and effective lead genera...

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    As an e-commerce website owner, I've registered for a Pawapay account and am seeking the expertise of an experienced programmer to integrate Pawapay's API as a payment gateway on my platform. Particularly, I require the features for Mobile Payments and Multi-currency Support to be incorporated. Dont apply unless you know exactly what you are doing please ! Ideal skills would encompass: - Advanced programming abilities for shopify - Strong familiarity with payment gateway integration, especially Pawapay - Extensive experience with Shopify - Knowledge of Mobile Payments and Multi-Currency Transactions Hence, I'm looking for someone who can seamlessly connect these features, ensuring smooth and efficient transactions on my e-commerce platform.

    $179 (Avg Bid)
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    As a business looking to create a substantial presence online, I'm looking for a talented web developer to mastermind an e-commerce website from the ground up. Your expertise should include, but not be limited to: * Full stack development of an e-commerce site * Ability to integrate key functionalities such as user registration/login, search capabilities, and online payment options While I realize these expectations are high, I trust that your portfolio will reflect your competence in these areas. I look forward to collaborating with a dynamic, punctual, and results-oriented individual or team that has a track record of stellar web development projects. I am looking for websites development My project is the Beauty parlour websites,there will be booking system, services like manicu...

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    Features required: Store Locator: Implement a store locator feature that allows customers to find physical store locations based on their location or search criteria. Product Badges: Design and integrate product badges to highlight special offers, new arrivals, best sellers, etc., on product listings. Slide-out Cart: Create a slide-out cart functionality that provides a seamless user experience for adding and managing items in the cart without leaving the current page. Product Page/Cart Upsells & Cross Sells: Develop upsell and cross-sell features on product pages and in the shopping cart to encourage customers to add complementary or higher-value items to their purchase. Minor Updates to Various Pages: Make minor updates and improvements to various pages of our Shopify store to e...

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    I'm in search of a visionary web developer with specific expertise in the world of NFTs and 3D interactive website development. The objective of my project is 3-fold: 1. NFT Development: Looking to establish an online marketplace to facilitate buying, selling, and trading of NFTs. Experience in building an NFT marketplace or related blockchain development is crucial. 2. 3D Interactive Development: The website should feature interactive 3D product displays. The ideal candidate would bring creative solutions to leverage 3D technology for an engaging user interface. 3. Crypto Token Creation for private sell. Skill-Set and Experience: - Track record in NFT framework integration and smart contracts - Experience in designing and developing interactive 3D displays - Proficiency in Crypt...

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    Project Introduction: Our company is creating a site that implements a function to look around cars using the PlayCanvas engine. The developer I worked with for 4 years left the job due to personal reasons, so I'm looking for a new developer. Development tools: PlayCanvas engine, React, Node.js, JavaScript, etc. All projects have already been created with PlayCanvas, so producing them with or making variations does not suit our company. We are looking for a developer who can import 3D model data into PlayCanvas, so we hope you understand this well before bidding. We are looking for a developer who can import 3D model data into PlayCanvas. Project Introduction: Our company is creating a site that implements a function to look around cars using the PlayCanvas engine. The developer ...

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    Find freelancer 6 days left

    Vue Js and Laravel Website Development I need an expert in Vue.js and Laravel to help me with an ecommerce website. The website is almost ready but I need someone to help me with fix bug in signin method. It also needs to be tested if everything is working fine. The candidate should be proficient in both technologies and have experience in building ecommerce websites. The following skills are required: - Vue.js - Laravel - HTML/CSS - JavaScript - MySQL - PHP - Git The project is medium-sized and should be completed within 5 days. I am looking for an intermediate level expert who can work independently and meet deadlines. Please provide a link to your portfolio and previous experience in similar projects. I will only consider candidates who can provide a detailed proposal for this proje...

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    I'm on the lookout for an experienced developer to create a novel concept: a fantasy sports website focused around the Stock Markets. Here are some of the things you'll be responsible for: - Designing a user-friendly interface for user registration and profile creation. - Implementing drafting and team management features. - Building in real-time scoring and statistical tracking. - Implementing a secure and reliable payment gateway. - Crafting a system to manage various contests. While this project is in its nascent stages, I expect fewer than 1000 user registrations to start, so scalability will be important moving forward. Prior experience with fantasy sports websites or financial market websites would be a significant advantage. I'm looking for someone who can bring t...

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    Hi, I would like to create a script that: -uses the Soslcan API -identifies new SOL tokens -creates buy orders based on certain criteria (fdv, volume etc) and sends to wallet please tell me in general how you would go about this so i know you are suitable for the task? As the client for this project, I'm seeking a proficient coder, experienced with Python and Java, to create a system that integrates with Solscan API to provide real-time updates. The runtime for this operation is vital, with a strict two-week deadline in place. Key Requirements: - Proficiency in Python or Java programming - Prior experience with API integration, notably Solscan - Ability to deliver the project in two weeks The selected freelancer will demonstrate a solid understanding of creating real-time upda...

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    I'm looking for a skilled WordPress developer to add floating buttons to my properties categories page. This simple addition is critical for enhancing the user interface, and therefore, user experience. The tasks for the project will include: - Placement: The floating buttons need to be positioned strategically on my properties categories page. Simple option, need to add floating buttons to properties categories page floating buttons is email, what's up, YouTube, Compare and when i add new properties it should come automatically I attached the reference image and need to add to this

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    I need a professional to design a highly functional e-commerce website with an integrated blogging platform and a contact form. Even though I skipped the question about specific features, I expect the standard features of an online store. These include: - Product listing: to showcase my products organised in different categories - Shopping cart: to facilitate purchase of items - User-friendly interface: to ensure a smooth shopping experience for my customers. Skills and Experience Required: - Proven experience in developing e-commerce websites - Excellent knowledge of WordPress, WooCommerce, and other e-commerce platforms - Experience in creating visually appealing and navigation-friendly sites - SEO and responsiveness expertise. Your ability to not just deliver but exceed my expectatio...

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    Website Development3 17 hours left
    VERIFIED

    I'm in need of an experienced web developer who specializes in React JS, CSS3, Tailwind, JavaScript, and D3. Urgent tasks, must start immediately and finish asap - The project involves solving UI bugs and building out new UI components. Ideal skills and experience include but are not limited to: - Experience in e-commerce web development - Versatility in CSS, React.JS, Javascript, D3, and Visual Studio Code usage I look forward to proposals from talented and flexible web developers.

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    More details: What type of payment system do you want to integrate? Square Would you want your payment system to accept multiple currencies? No Would you like to include a feature for recurring payments or subscriptions? No

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    My react native app is currently facing several backend issues and I'm in need of a Node.js developer capable of handling and troubleshooting the problems. Your duties will be: * Bug identification and fixing, particularly those related to the backend. * Maintaining user authentication and database integration. * Ensuring the functionality of push notifications. The ideal candidate for this project possesses the following skills and experience: * Strong knowledge of Node.js. * Experience in backend development for React Native applications. * Expertise in API development and server configuration. * Familiarity with database optimization techniques. Please apply only if you're confident that you can swiftly identify and rectify backend related issues. Your ultimate goal w...

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    As the project manager, I'm seeking a proficient software developer to build a web application using Java, Angular, and AWS. This application, at its core, should prioritize top-notch user authentication. Requirements and Features: - Develop a web application using the Java language, Angular framework, and AWS as the cloud platform. - Implement an effective user authentication system. This is critical to ensure secure access control and protect user data. Ideal Skills and Experience: - Extensive experience in Java, Angular, and AWS. - Proven track record in implementing robust user authentication systems. - Knowledge of best practices concerning web application security. - Strong attention to detail and commitment to user privacy and data protection. Finding an ex...

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    As the creator of a start-up venture, I need a seasoned Flask developer to create a sophisticated page builder with functionalities I can quickly and conveniently manage. Key requirements of note: - Page builder should have a drag and drop feature. - Drag and drop feature should support advanced elements, particularly forms and maps. - The page builder should integrate with databases, as well as e-commerce systems. Ideal Skills and Experience: - Proficiency in Flask, a python-based micro web framework is imperative for this job. - Experience with developing drag and drop user interfaces. - Familiarity with advanced UI components like forms and maps. - Proven track record with integrating systems with databases and e-commerce platforms. I am looking forward to getting proposals f...

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    I'm in need of a professional with competency in architectural modeling, particularly to create a 3D representation of a stadium lounge area for integration onto our website. Our website utilizes navigation with a mouse and keyboard, and we require the 3D model to be seamlessly integrated using , a JavaScript library for 3D rendering. The lounge will be used for VIP seating─ this should heavily influence your design aesthetic. Please share relevant work samples along with your application. I've attached a file for your reference. Deliverables: A 3D model in .gltf format compatible with Optimal texture mapping and UV unwrapping File organization for easy integration into our website

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    We are currently seeking a talented React Front-end Developer to join our team. As a React Front-end Developer, you will be responsible for creating and implementing user-friendly interfaces and components using React.js. Responsibilities: Develop new user-facing features using React.js Build reusable components and front-end libraries for future use Ensure the technical feasibility of UI/UX designs Optimize applications for maximum speed and scalability Collaborate with other team members and stakeholders Requirements: Proficient in React.js Strong understanding of JavaScript, HTML, and CSS Experience with RESTful APIs and modern web technologies Knowledge of state management libraries such as Redux or MobX Familiarity with version control systems such as Git Project Codebase: If ...

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    I am in need of a proficient developer who can build a REST API for a Python script to facilitate integration with another internal application, primarily written in PHP. Key requirements include: 1. API Development Expertise - You should have strong working knowledge of Python and PHP and substantial experience in REST API development. 2. Integration Knowledge - A clear understanding of how internal system integration works. 3. Problem-solving Abilities - The capacity to troubleshoot, spot issues, and provide quick, effective solutions should any problems around integration arise. This role is suited to anyone who thrives in challenges and is excited to make existing systems more efficient via integration. If you're the kind of developer that loves a good puzzle, I'd love to...

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    I’m searching for an experienced Node.js developer skilled in adding new functionalities and fixing existing issues. Your tasks include: • Adding a new feature, which involves user authentication, file uploading, or data validation. The specific functionality to be added will be discussed further upon successful bidding. • Correcting bugs related to functionality that does not work as intended. The specifics of the issue will be elaborated during the course of the project. For your application to be considered successful, please include examples of past work related to Node.js development. Your experience should ideally involve project management, problem-solving, and the ability to work independently. It’s imperative you’re able to take a unique approach ...

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    We need to talk about it because its complicated a little bit

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    I'm in need of an experienced Full Stack Developer, exceptionally proficient in JavaScript, Python, and AWS. The aim is to design a Web Map Application; however, the specific functionalities were not explicitly defined. Key Responsibilities: - Work on the complete process of web development - Deliver high-quality, efficient code - Be aware of the latest trends in web application development Ideal Candidate: - Extensive knowledge in JavaScript, Python, and AWS - Prior experience in designing Web Map Applications will be beneficial - Knack for creating aesthetically pleasing and user-friendly designs Given that the time frame for completing the project has not been specified, please include your estimated time for completion in your proposal.

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    I am looking to bring my vision of an ultra-responsive, powerful smart glass to life. This innovative piece of technology will be tailored to a wide demographic, from everyday consumers to dedicated gamers and industry professionals. Crucial features will include: - Augmented Reality functions: In-depth immersive experiences are the key here, so familiarity with AR development is a must. - Voice command recognition: I need to incorporate smooth, accurate voice recognition functionalities. - On-screen notifications: The smart glasses should allow users to receive and respond to notifications on the fly. - AI Integration: AI will drive this device, enhancing user experience and improving adaptivity. Proven experience in hardware development, AI, AR, user interface and voice recognition tec...

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    I'm seeking a jack-of-all-trades in design and tech; someone with vast capabilities in graphic and UI/UX design, as well as game design for iOS platforms. The scope extends to drone and Raspberry Pi projects, in addition to web design. Your proficiency in embedded systems programming, web development, mobile app development, Arduino, and video game design will be crucial. Understanding a beginner's perspective will be key, as the project requires design and coding deliverables easy for beginners to grasp and use. Key Skills & Experience: - Graphic, UI/UX, Web and iOS game design - Coding prowess in Web & Mobile app development - Proficient with Raspberry Pi, Arduino and Drones - Game Design and Development - Aptitude to breakdown complex tasks for beginners.

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    I'm looking to hire a skilled React Redux Developer for an open-ended project. While the exact features of the application haven't been nailed down yet, potential features could include user authentication, real-time data updates, or responsive design. Ideal candidates will have: - Proven experience with React Redux - An understanding of potential features such as user authentication, real-time data updates, or responsive design - Relevant examples of past work - Ability to provide a detailed project proposal The main objective of this application hasn't been defined but it might be to improve user experience, streamline data management or increase efficiency. Please bring your expertise and ideas to the table. We're open to suggestions and innovative solutions.

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    I'm in need of an experienced web developer who specializes in React to build an e-commerce site. The essential feature is a product reviews system which is pivotal for interactions between buyers and sellers. Ideal Skills & Experience: - Proficiency in JavaScript and React - Experience in e-commerce website development - Knowledge in implementing review systems Your familiarity with various user types (buyer and seller in my case) should inform the design considerations and functional implementations. Let's connect if this project aligns with your expertise.

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    I'm currently seeking a professional Java expert to maintain and polish an application designed for both taxi and delivery services. This app has dual functionality catering to both businesses and individual consumers. As my app continues to grow, I need a reliable Java developer who can make my app the best it can be. Key Responsibilities: - Bug fixing - Feature enhancements - Code optimization Ideal Candidate Skills and Experience: - Proficient in Java with knowledge of latest versions - Proven experience in maintaining and enhancing mobile app - Understanding of taxi and delivery service industry is a plus - Strong problem-solving abilities - Able to optimally identify and fix bugs - Experience in code optimization - A proven track record in adding innovative features to increas...

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    Hi, I need all APIs that are streamed by Lightspeed K-Series in a bootstrap admin dashboard integrated and have fully statistics of the POS software of multiple restaurants in charts, many statistics, like revenue, visitors per day, reports etc.

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    Hello there, We are pleased to inform you that our website is functioning flawlessly and has been generating much business for us. However, we are now looking for someone highly creative and skilled in designing intuitive interfaces, so that they can help us in arranging categories, buttons, and fonts optimally. We would also like to request that you optimize our website's ranking and speed on Gt Metrix to improve its overall performance. Step 1: Take a website copy and run it on a test server. Step 2: Implement changes as mentioned above and upload back after tests are performed. Thank you for your assistance, and we look forward to hearing back from you soon.

    $224 (Avg Bid)
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