Website user data trabalhos
I'm seeking a professional to develop a platform dedicated to individual users wishing to trade-in their mobile devices. Ideal Expertise: - Experience in building user-friendly platforms Requirements: - It should clearly illustrate the trade-in process to users - The platform must be capable of calculating fair market value for the devices being traded in. - It should be designed with individual users in mind, with user-friendly and intuitive interface. Great understanding of the current electronics trade-in market would be advantageous. Preference will be given to those who have past experiences creating similar platforms.
I'm in need of a skilled fullstack developer to create a price est...Proficiencies: - Proficiency in HTML/CSS, JavaScript, Python. (Ideally React and Django) - Experience in developing and integrating web scrapers. (Optional) Project Requirements: - Develop a website with price estimation capabilities. - The site should be connected to a web scraper. - The scraper is to take data specifically from a certain price comparison site, details to be provided. This project entails both front and back-end development, with an emphasis on creating a user-friendly interface and a secure, efficient back-end. An understanding of data presentation for the end-user is essential. In order to show that you've read the post, please write ...
I am in the process of starting a travel and living blogging website and need expert guidance in certain areas of law particularly: - Copyright and intellectual property: I will be publishing various types of content including articles, blog posts, photographs, and videos. Some content will be user-generated and I want to ensure this is protected and legally sound. - Privacy and data protection: As I will be collecting and storing user data, I need to understand and comply with privacy laws and protection of user data. - Advertising and sponsorship: It would be beneficial to navigate the legal realms of these areas, as I aim to monetize my blog through ads and sponsorships in the future. My target audience will encompass travel enthusiasts...
I'm seeking a WordPress super user with specialized knowledge in Elementor. Primary Role: * Configuring and installing the Elementor plugin tailored to meet my specific design. Skills and Experience: * WordPress expertise * Hands-on experience with Elementor * Strong understanding of plugins * Ability to execute specific design setups Design: * I already have a design scheme in mind. I need this brought to life within the Elementor framework on my WordPress site. Please include examples of past Elementor-based projects in your bid. TASK DESCRIPTION: We are looking for an experienced individual familiar with WP-Elementor and the ability to quickly grasp Modern Events Calendar Pro and its related addons. Initially, the task is a short-term effort of 2-4 hours. GOALS:...
...App for user remote control of two relais. Description: - This is a PoC App. - Android app to manage user remote control of two washingmachine relais. - Android App with GUI to be used by regular users (3-8 expected) - Reads data from DB (tables provided by me) and sends string commands over BLE to an ESP32. - Receives commands from an ESP32 and writes the data to the DB. Programming technologies: - I have a LAMP server already - DB (MySql) tables will be created by myself; you will ack or suggest changes, if needed - Code will be written using C#, python or RUST. - You will use Jira management and BitBucket source control. - You will provide a basic design and code documentation. App installation: - (a) New user? (b) Existing user but new ph...
I'm searching for a dedicated Flutter developer who can efficiently scrape user device information for a flutter app. the device would scrap user demographic information, location (approximate), app usage to make a profile. I do not need you to create the profile. the only work would be to make a script to fetch this data and process in a format for the machine learning to be performed. please check the data format i shared. please bid only if you want to work and on a budget of 25 euros.
I'm in need of a website developer proficient in designing recruitment sites. The envisioned site should feature: - An applicant tracking system: to help manage and streamline hiring processes. - A resume database: for ease of storing and retrieving candidate profiles. - Student profile creation: an interactive platform for students to create and update their profiles. - Recruiter log in view: enabling recruiters to access the site, view profiles, and interact with potential candidates. Although there won't be specific job types listed, the website should accommodate all future possibilities. Proficiency in user-friendly design, data management, and recruitment website trends will be highly appreciated.
As a growing business, we are relying more on our digital presence. We are in need of a proficient PHP/Vue developer to help us add new features to our existing website. Tasks to perform: - Front-end development: Enhance our user interface with attention to detail and creativity. - Back-end development: What’s under the hood matters to us. We’re looking for stable and logical back-end services. - Database integration: Our data is growing, we need to utilize it effectively and consume it in our website. We strongly prefer freelancers with: - A knack for tackling challenges with innovative solutions - A keen eye for aesthetics and details - Experience with front-end technologies: Vue.js, JavaScript, CSS - Experience with back-end technolo...
I'm in search of a proficient Vue developer who can take on the task of designing and implementing a robust and feature-rich user dashboard. You will be tasked with: - Designing UX/UI components for the user dashboard - Integrating these designs into the final product - Optimizing performance for a seamless user experience - Very picky about code review - so we must follow their design standards - The backend is built in Java with a Tomcat server Ideally, you'll have experience with dashboard customization, which is a key feature for the project. Your challenge will be to create a user-friendly interface that users can effectively personalize according to their needs. Assuming you have read the full description... in your proposal, please let me kn...
I'm looking for a skilled Python programmer to develop an automation program. This program will be responsible for fetching orders from a customer website and inputting them into our Quickbooks system. The ideal candidate will have a strong background in: - Python programming - Experience with automation processes - Knowledge of Quickbooks integration The main task will be centered around automating a highly repetitive task, freeing up valuable time for other areas of business. The ability to scale and adapt the program for future automation tasks will also be a highly desirable skill. Please only apply if you have previous experience with Python and automation tasks. Your proposal should indicate how you will approach this task, and any relevant experience you have in this a...
I'm seeking an expert developer to create a s...of the Khata Book application. Here are the key elements to be incorporated in this development project: - Platforms: The application should be developed for both Android and iOS users. - User Authentication: For an enhanced experience, every user should be able to create their individual accounts using their email. - Timeline: My project has an urgent requirement with a timeline 'ASAP'. Prospective freelancers would ideally have previous experience in developing multi-user applications with a background in diary or journal-based app design. Proficiency in Android and iOS development, as well as user authentication methods is essential. Ability to deliver quality work quickly would be highly advan...
I am looking for a skilled web designer to create a user-friendly website specifically optimized to promote my products/services. Main requirements: - The design should focus primarily on usability, ensuring an intuitive, and sleek interface that will guide users effortlessly through the website. - Key elements to be prominently displayed are our contact information, intended to ensure a seamless communication channel with site visitors. Ideal candidates would have: - Prior experience in designing websites with a focus on user-friendly design - Understanding of modern design principles - Experience in optimizing websites for product/service promotion.
I'm in need of an experienced WordPress specialist who understands Ultimate Membership Pro to optimize the user registration capabilities of my site. My WordPress website has a functioning membership plugin that can take (i) sign-up payments with PayPal and (ii) registrations without payment. I need modifications to the system to allow (iii) renewals with payment and (iv) correct notification to people who register without payment. The plugin is Ultimate Membership Pro. Someone familiar with this plugin should be able to accomplish the task quickly.
...collaboration. This is a monthly basis project. The successful candidate will work closely with our team to bring our vision to life and deliver a high-quality dating website that meets our requirements. Key skills for this role include: - Robust user authentication system - Real-time content and interaction updates - Seamless integration with various third-party APIs, crucial for expansive functionality Ideal candidates should have extensive experience in: - Building and maintaining large-scale social media platforms - Implementing complex user permission systems - Working with real-time data handling, crucial for a dynamic user experience - Integrating a wide range of third-party services Standouts will demonstrate: - Proven track record with Re...
...TrueNAS and Nextcloud systems who can perform the task of user synchronization in an automated manner. Specifically, • The project setup already includes TrueNAS and Nextcloud instances. • The main objective is to achieve effortless user management across both systems via synchronization. • You need to implement automated synchronization between TrueNAS and Nextcloud; The professional that is best suited for this task should demonstrate: 1. Profound understanding and working knowledge of both TrueNAS and Nextcloud systems. 2. Proven background in automated synchronization tasks. 3. Attention to detail to ensure seamless integration. 4. Ability to test the synchronization for quality assurance. The result will be a highly efficient user management...
Seeking a skilled Website Designer/Developer to build a visually appealing, easy to navigate, and mobile responsive website and membership community with Wordpress and BuddyBoss. The public facing website will include free content (blogs, educational material) and will solicit information from users (questionnaires/surveys, topics of interest, demographic information for mailing lists). The membership functions will include registration and management, social networking, member only content, community forums, etc. available on BuddyBoss. Qualifications: 1. Collaborative and forward-thinking problem solver; excellent communication skills 2. Proven experience building websites with WordPress and BuddyBoss 3. Experience in implementing responsive and intuitive designs f...
I'm experiencing an issue with my Shopify store - the user account icon does not appear in header. I need a developer proficient in Shopify to resolve this problem. Budget for this project is fixed at 5$, so if it doesn't suit you, don't waste my time. website link: START YOUR BID WITH ZEKOOOO
...functionality of my existing app. This will involve revamping the color scheme, layout, icon and button design, as well as fonts and styling. Your contributions will make the app more appealing to our target audience - young adults. The preferred visual aesthetic is friendly and colorful. Ideal Skills and Experience: - Proven experience in UI/UX design - A strong portfolio displaying creative, user-friendly designs - Ability to design with a youthful, vibrant aesthetic - Strong command over choosing and implementing effective color schemes - Familiarity with creating clean, structured layouts - Expertise in designing eye-catching icons and buttons - Deep understanding of appealing fonts and styling for mobile apps Please attach relevant work samples or a portfolio link with y...
I am experiencing some design and layout issues on my existing website. For one, it is not positioning well on Google searches. I am looking for a skilled professional who can: * Detect and fix these issues * Update the color scheme to make it more appealing * Improve the navigation to ensure users find what they need effortlessly * Enhance the visual appeal of the entire site * Recommend and apply changes that enhance its performance The main aim of this website is to provide information. To be a good fit for this project, you need to have a solid understanding and proven experience in web design and user experience. SEO expertise will also be critical to make it more visible on Google.
Hello! I'm looking to significantly enhance the user experience on my platform with immediate effect. Although the done bidding tool's primary function was not specified, its overall effect should lead to a more fluid, intuitive, and satisfying user journey. Experience and Skills: - Profound understanding of user interface design - Proven track record of improving user experience on similar platforms - Ability to deliver fast results, as the work needs to be completed ASAP - Preference for candidates who can offer insights into streamlining bid management or automating the bidding process.
As an experienced and ambitious leader in the software development industry, I am seeking a freelancer with exceptional expertise in designing and implementing a completely automated pull request creation system based on user input. The ideal candidate must possess a profound knowledge of React, Python, Terraform Kong, Atlantis Module, and API technologies. The expected timeline for completion of this project is 1-2 weeks. I have a specific framework and technology platform already chosen for this project and expect the freelancer to have a high level of expertise in this area. If you can lead the project from conception to completion with the highest degree of competence and skill, then I invite you to apply. As this project is very important to me, I am prepared to pay a generou...
I'm on the hunt for a proficient website developer who can design a data entry website for my business. Key Features: - Data Entry Form: The core component of the website would be a data entry form, where employees will fill out necessary informations. The form should be logically structured and user-friendly to ensure smooth navigation for the users. Skills & Experience: - Extensive experience in designing functional websites - Proficient in database management - Detail-oriented with an understanding of data entry and form design - Familiar with creating a user-friendly interface that caters to employees An individual with prior experience establishing similar data entry websites would be ideal. I need so...
...in the “Technology Description” section below. <Technology Description> This technology is a technology for delivering users by autonomous driving vehicles. When delivering users by autonomous driving vehicles, there may be a possibility that the user feels hot or cold depending on the temperature inside the vehicle at the time of pickup, and the user may feel uncomfortable. To solve this problem, this technology adjusts the temperature inside the vehicle at the time of pickup to a temperature that the user feels comfortable by allowing the user to specify the setting temperature of the vehicle air conditioner when requesting delivery to the autonomous driving vehicle. Please investigate this technology this time. <<NOTICE>> ...
I'm in need of a skilled PHP/Laravell developer to undertake some enhancements to our platform, focusing on the user account management system. Improvements are needed in terms of functionality, and while some specific details are not yet fully decided, this endeavor may involve changes to the underlying registration, login, or user profile customization processes.
I am looking for a professional web designer skilled in customized website creations, specifically targeted towards businesses. We are a leading big data research firm. Our mission is to harness the power of big data to drive innovation and insights across various industries. We are looking to create a website that reflects our cutting-edge approach in the field of data analytics while maintaining a sense of accessibility and professionalism. We will supply logo/name at a later date. Just have a placeholder for it. The website should have a tech-savvy and modern design, appealing to both industry professionals and potential clients who are not experts in the field. It should be user-friendly, with intuitive navigation and a clean, unclutte...
...address, website link if any, deals in and gst number and scanned copy of the image of the card and all of these fields should be appropriately validated before storage in the database. Search options to include by name of person, name of firm, GST number, products dealing in and city from address. Features: - User-friendly interface: The script should have a clean and intuitive interface that allows users to easily navigate and manage their visiting card records. - Advanced search capabilities: Users should be able to search for specific information within the visiting card records, such as name, company, or contact details. - Data security: Ensuring the security of the stored visiting card records is crucial. The script should have robust security measures in...
...engaging fantasy football website that caters specifically to my requirements. The website's primary purpose is to serve as an information hub for fantasy football, encompassing the following features: - Player Rankings: A section dedicated to critically analyzing and ranking professional football players. - Leagues: A system that allows users to join leagues, complete with draft functionality and management and team management features. - Matchups: An area of the site dedicated to detailed player matchups. - Player Distribution: A tool that provides statistics about player distribution within different leagues. An essential aspect of the project is an easy, user-friendly account system, making the viewer’s interaction as efficient as possible while ensuring ...
I need a technically skilled freelancer to create a dynamic, accurate and user-friendly dashboard that will allow me to seamlessly monitor my inventory. The dashboard should have the capability to: - Fetch 90-day sales information on a daily basis from various systems including SKUvault, two POS Square accounts, Shopify website, and Amazon Sellers account. This will help me track the performance of different platforms and cross analyze the data for business insights. - Keep an up-to-date record of the number of items sold, stock remaining, and best-selling items. This is crucial for consistent product availability, improved sales forecasting, and robust revenue generation. An ideal candidate for this project would have exceptional skills in web development, preferabl...
I'm searching for a dedicated Flutter developer who can efficiently scrape user device information for a flutter app. the device would scrap user demographic information, location (approximate), app usage to make a profile. I do not need you to create the profile. the only work would be to make a script to fetch this data and process in a format for the machine learning to be performed. please check the data format i shared. please bid only if you want to work and on a budget of 25 euros.
...build a social website. This site is intended for adult audiences, requiring the incorporation of specific elements. Key Features: - User Profiles: The ability for users to create and personalize their profiles is necessary. - Messaging System: Communication between users must be facilitated via a secure and easy to use messaging system. - News Feed: A dynamic News Feed that updates with posts from others, similar to popular social networking sites. Engagement Features: - Like/comment system: Users should be able to interact with each other's content through likes and comments. - Follow/Unfollow Users: Option to follow/unfollow other users to customize one's own news feed. - Post Creation/Sharing: Ability for users to craft and share posts, promoting engagement...
I am after an experienced developer to build a website similar to I want it with identical functionalities. - search product keywords and options to buy products from link and so on - Product search and filter options - Shopping cart and checkout options The ideal professional should have considerable experience in website development. Previous work with e-commerce websites is definitely a plus. Please share sample works or portfolio when bidding. I haven't decided on the deadline yet, but I'm open to hearing about your estimated timelines and delivery schedules.
I am looking for an expert in React.js and Bootstrap who can help develop a user authentication system based on email and password. This project requires the implementation of real-time data updates specifically for notifications. Ideal Skills: - Proficient in React.js and Bootstrap - Experience in implementing user authentication systems - Familiarity with real-time data updates - Specific experience with notification systems is a plus
I need a person who can work with me registering 70 real different new users in my website The person have to send evidence for this job. This person is going to receive 5 stars and good review if everything it’s ok. $10 USD This registration function will require users to provide their name and email address only. Key Responsibilities: - Develop a straightforward process for single user registration. - Incorporate an email verification system post-registration for account activation. Your expertise in creating user-friendly registration experiences will be vital to the ease of use and overall user experience on my site.
I am looking for a PHP developer to create a web page where users can upload PDF files and have a real-time chat with GPT-3.5 based on the content of the document. The purpose of the chat is to generate responses based on the document's content. Key requirements for the project include: - Ability for users to upload PDF files - Real-time chat functionality with GPT-3.5 - Option to save the chat history for future reference Ideal skills and experience for this project include: - Strong proficiency in PHP - Experience with integrating chatbots or AI models - Familiarity with handling file uploads - Knowledge of database management for storing chat history If you have the necessary skills and experience, please submit your proposal. Thank you!
I am seeking a proficient developer to create an e-commerce website featuring a minimalist design. Key functionalities that need to be integrated include: - User Registration and Login: Capability for users to create and manage their accounts (basic) simple user dashboard. - Payment Integration: Setting up a secure and user-friendly payment gateway (Stripe) - Database Management: Efficient system for managing customer data and transaction history (basic) As a priority, I need this site to be very user-friendly and straightforward to navigate, aligning with a minimalist design aesthetic. The ideal candidate would have previous experience building e-commerce websites, especially using bubble.io. They should also have a strong backg...
For this digital project, I'm seeking a seasoned website developer who can build a share market trading site from the ground up. Not only does this platform need an intuitive and user-friendly interface, but it also needs to be brimming with pivotal features for potential investors. Key Website Features: • Real-time stock quotes: A critical resource for share traders, real-time data ensures our investors are always in the loop. • Trading charts and graphs: Visual aids will supplement investors' trading strategy and decision-making process. • Portfolio management tools: Because every keen trader requires a central location from which they can manage their investments. Essential Services to be included: • Investment advisory servic...
I am looking for a freelancer with experience in Python programming to help me with a beginne...a beginner level web development project. Skills and Experience Needed: - Proficiency in Python programming language - Experience in web development - Understanding of beginner level complexity in projects Project Requirements: - Develop a web application using Python for backend development - Create an interactive and user-friendly frontend using HTML, CSS, and JavaScript - Implement basic functionality such as user authentication and data storage - Ensure the website is responsive and compatible with different devices and browsers If you have experience in Python programming and web development, and are comfortable with beginner level projects, please reach out ...
...As our UX Designer, you will play a crucial role in shaping the user experience of our website and mobile app. Your expertise will guide the development of an intuitive, engaging, and visually stunning platform that resonates with our surfing community. Key Responsibilities: Design and iterate on user interfaces for our website and mobile app. Conduct user research and usability testing to gather insights. Collaborate with our product team to define and implement innovative solutions for product direction, visuals, and experience. Create wireframes, storyboards, user flows, process flows, and site maps to effectively communicate interaction and design ideas. Evaluate user feedback and adjust designs accordingly to enhance user sa...
I am looking for a talented developer to create an innovative and user-friendly interface for a Mobile Ai Sketch project. The main aim of the project is to seamlessly convert hand-drawn sketches into digital illustrations. The application needs to be compatible specifically with mobile devices. The ideal candidate should have: - Proven experience in designing and developing user interfaces for mobile applications. - Strong UI/UX understanding. - Skills in incorporating Artificial Intelligence in mobile applications. Project Requirements: - A Pen tool for drawing. This is essential in bridging the gap between hand-drawn sketches and digital illustrations. - The tool must deliver high accuracy in sketch recognition while maintaining the authenticity of the original sketch. ...
...Fund Site Project Description: We are seeking a skilled WordPress developer to create a comprehensive and user-friendly website for our investment fund management company, Income Capital Management s.r.o. This project involves developing a website with a keen focus on Forex and real estate investment funds. The site will consist of both a frontend showcasing our company's activities and fund characteristics, and a backend designed for customer interaction and management. Key Responsibilities: Design and develop a responsive, secure WordPress website. Create a frontend that effectively describes our company’s activities and investment fund details. Develop a backend system for user registration, including onboarding questionnaires, complia...
...strategy and can provide a comprehensive proposal for my web design project. Your experience will play a key role in driving organic traffic to my site, improving its search engine ranking, and enhancing the user experience. - SEO Expertise: Proficiency in formulating SEO strategies is a key requirement. Evidence of practical work that you have successfully increased organic traffic and improved website rankings will be highly regarded. - Web Design: I also need your creativity to make my site user-friendly and aesthetically pleasing. Having a keen eye for design and understanding of user experience are crucial. - Project Proposal: I require a detailed and precise project proposal outlining your plan of action. This will give me an insight into how you w...
...build a subscription-based website for selling physical products. Here's a rundown of my specific needs: - Website Construction: The site should be robust, user-friendly, and visually appealing. It needs to handle high traffic volume without compromise to performance. - Subscription Model: The website should offer a variable interval for subscribers – bi-weekly, monthly, every other month. Flexibility is key for my customers. - Product Uploads: Some of my product photos and descriptions are ready for upload. The selected freelancer should be prepared to assist with entering the remaining product details. Ideal skills needed for this project include: - E-commerce website development - Knowledge of subscription-based business models - Exp...
...functionality similar to the form at Specifically, users should be able to input area and depth to calculate volume. Key features should include: - Calculation of volume based on user-inputted area and depth. The formula used will mirror the one displayed on the provided link. - Real-time display of results as users input their data. - Plugin compatible with WordPress for easy integration on any page of our website. As this tool will be public-facing on our site, ease of use and user interface aesthetics are crucial. The ideal freelancer will have experience in WordPress plugin development, especially those involving mathematical calculations. Strong JavaScript and PHP skills are a must. Experience in creating plugins with
I'm seeking a highly skilled virtual assistant to help with multiple tasks, dynamic, adapting to different tasks as your business evolves.. The main tasks include, but are not limited to: Market Research: Identifying target markets and customer segments. Analyzing competitors and industry trends. Gathering data on pricing and services offered by competitors. Website Development and Management: Designing and updating the website. Ensuring mobile compatibility and user-friendly navigation. Implementing SEO strategies for better online visibility. Managing content updates and blog posts. Content Creation: Writing and editing blog posts, articles, and newsletters. Creating content for social media platforms. Developing marketing materials like brochures and...
...professional lead generation landing page for my business based on the following website: This individual will have the Following skills and experience: - Proficient with HTML, CSS, JavaScript - Proven success designing and building lead generation landing pages - Experience with web form creation and data capture - A great understanding and eye for clean and professional design aesthetics The main goal of this page is to: - Attract and engage with potential leads by promoting my services and product - Successfully capture visitor's name, email address, phone number, company name and industry information through an intuitive and seamlessly integrated form. This valuable user data will be leveraged for business growth and marketing strategies. The ...
...feedback application with admin login. You need to revise a user-friendly dashboard that utilises form validation, dynamic content, and capture date. The successful applicant will have the following skills and experience: - Proficient in JavaScript, HTML - Can create an engaging, user-friendly dashboard - Skilled at implementing real-time data updates - Experience with creating interactive charts Your task will be to create an interactive dashboard that efficiently displays user engagement data in real-time. This dashboard should illustrate a clear and intelligible presentation of the data through interactive charts. Form validation and dynamic changes to the content should be enabled. Use your expertise to ensure the interface is user...
I'm looking to develop a trading simulator website. The website must feature real-time stock market data, an interactive trading interface, and user portfolio tracking. The simulator should support a variety of platforms, including Stocks, Options, and Forex. The ideal freelancer for this project is one with previous experience in website development, particularly in creating trading simulators or similar financial applications. A good understanding of the financial market and the ability to integrate live data streams into a user-friendly platform is crucial.
I'm looking for a proficient web designer to adapt the UI of functioning registration forms on my PHP/MySQL website to a responsive design. This needs to be optimized for both desktop and mobile platforms. Additionally, integration of CAPTCHA security measures is needed to enhance user data security. Ideally, the professional working on this project should: - Have substantial experience working with PHP/MySQL and responsive design. - Have prior experience integrating CAPTCHA on registration forms. - Understand UX principles and have a keen eye for clean design ensuring easy navigation for users. The result should be a user-friendly and secure registration forms that provides a seamless interface across both desktop and mobile devices. Please see deta...
Currently, I'm in need of an experienced data miner who can help extract specific text content and user data from a selected website. this is the link for the data! i need it in excel sheet also the phone numbers i need it all starts with the country code (966) Key Responsibilities: -Specific Text Collection: You will need to extract and collect the specific text content from the said website. total data around 15K users -User Data Mining: The focus will be on gathering specific details which include: * Names * Phone numbers * License numbers * License expiry dates * Cities Ideal Skills and Experience: To make this project a success, prior experience in data extraction, web scraping, data...
...proficiency in MERN stack. This project revolves around building a website primarily for students that offers the following features: It is a data structures and algorithms tracker, with interview experience page and discussion forum, compiler integration, reference is leetcode, hacker rank. 40% of the project is done with login, signup, home page, chatbot(UI) containing questions for practice. every question has to be integrated with the compiler. the website should me done according to my customizations The goal of this project is to develop an information-centric website that helps students with their academic needs. Key Skills: - Strong knowledge of MERN Stack (MongoDB, , React.js, Node.js). - Experience in building user authentication syste...