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I'm seeking a fresh Python backend developer with a focus on API development, specifically RESTful APIs. The primary task will be implementing user authentication within these APIs. Ideal Skills: - Proficiency in Python - Basic understanding of RESTful APIs - Experience with implementing user authentication This is a perfect opportunity for a recent graduate or someone looking to gain practical experience in the field. I am open to mentoring and guiding the right candidate.

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...of user interface design, ensuring the app is easy to navigate for both customers and staff. - Expertise in implementing secure payment systems and real-time tracking features. Easy Mover App Development Brief Vision & Mission The Easy Mover app aims to streamline the moving process for both customers and subcontractors through an intuitive and comprehensive digital platform, enhancing user experience and operational efficiency. Design Inspiration The app's UI design should be vibrant and engaging, drawing from the colorful geometric patterns provided. This design will be used consistently across the app to maintain visual appeal and brand identity. 1. Customer-Facing Features (Front-End) 1.1 Quoting System Dynamic Pricing Engine: Develop a backend service usin...

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I'm seeking a skilled backend developer to create a comprehensive customer management system for my sales project. This system should encompass: - Customer Profiles: Ability to track and manage individual customer details. - Order History: Monitoring and recording past purchases of each customer. - Customer Support Integration: Seamless incorporation of our customer support interactions into the system. The system needs to support integration with our customer support channels, specifically emails and calls. Therefore, experience with telecommunication APIs and email handling systems will be highly beneficial. Proficiency in backend programming languages and databases is essential. Knowledge of building scalable systems would be a plus. Your role will be cruci...

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... * Payment gateway integration (specifically PayPal) * Dashboard or content management system (CMS) * API integration (as needed) * Mobile-friendly design, optimized for all devices - Technology Stack: * Frontend: React.js * Backend: Node.js * Database: MongoDB, MySQL - Design: Clean, modern, and user-friendly design, adhering to branding guidelines (if provided). Timeline: Target completion is flexible, but I would like to discuss a reasonable timeframe with you based on your expertise and the scope of work. Budget: My budget is flexible and can be adjusted based on your expertise and the scope of work. Additional Notes: - I'm open to suggestions and improvements to enhance the project. - Clear communication and regular updates are essen...

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...automatically connect to their assigned proxies before performing actions. • Implement randomized yet controlled actions to avoid detectable patterns. 3 Movement Package Integration: • Assign each device a unique movement package (a set of AI-driven behavior models) tailored to its usage. • Define touch patterns, speed of interaction, and app navigation behavior for each device. 4. Security Framework Bypass: • Analyze and restrict access to security frameworks (e.g., Samsung Knox) by using tampered firmware. • Remove tamper flags on rooted devices to bypass basic security protections. 5. Cryptographic Environment Emulation: • Preload generic cryptographic responses for Secure Enclave validation to avoid app crashes. • Use proxy servers...

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...comprehensive online platform where students can search for, evaluate, and apply to university programs at various education levels (Bachelor, Master, PhD, Courses, ESL classes). The platform will include an admin backend for data management and a user-friendly frontend for students to explore programs and complete their application process seamlessly. The functionality and flow of the website will largely align with platforms like while being tailored to your specific requirements. ________________________________________ Key Features and Functionalities: Admin Backend: The admin section will allow for the following: 1. Destination Countries: Add, edit, and manage a list of destination countries where students can apply for programs. 2. Universities: Add and manage un...

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I’m working on an Angular/.NET application with a functional small attachment tab UI and several working APIs. However, I’m facing issues with two APIs: 1. Insert API: Data is not being inserted into the database. 2. Fetch API: Unable to retrieve data properly. Technologies used: - Frontend: Angular - Backend: .NET Core, .net framework - Database: [SQL Server/MySQL, MongoDB.] Deliverables: - Fix the insert and fetch API issues. - Ensure proper testing for functionality.

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I'm seeking a backend engineer skilled in Python, and data preparation activity for ML. Key Responsibilities: - Collaborate in the design and development of a robust, efficient, and secure RESTful API. - Implement best practices in API development for scalability and maintainability. Ideal Skills: - Proficient in Pytho - Proven track record in RESTful API development. - Strong understanding of backend engineering principles. - Excellent problem-solving and communication skills.

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I'm seeking a frontend developer to create a modern and minimalist design for my SaaS application using Vue.js. Key Requirements: - Design and implement the complete frontend based on a modern and minimalist aesthetic. - Collaborate with me to refine and finalize design elements. - Utilize Vue.js framework for development. Ideal Skills: - Proficiency in Vue.js. - Strong UI/UX design skills, particularly in modern minimalist design. - Experience in frontend development for SaaS applications. - Excellent communication skills for design collaboration.

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Project Title: Front-End Development for a Website UI Description: We need a skilled front-end Angular 19 developer to create a webpage with some e-commerce capabilities. We already have webpage design and functional...features for mobile devices and tablets, mainly for desktop end-users - Code Quality: Clean, readable, and maintainable code with comments where necessary. Deliverables: - Complete source code onto specific Github repositories - Fully functional responsive web pages to requirements for posting onto website. Deployment instructions - Timeline by best estimated time to complete the project. - Backend integration with MySQL database, API. - Front end Web Development with Angular 19 Skills Required: - JavaScript - CSS - HTML5 - Angular 19 - API - Connecting to MySQ...

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I'm looking for a very simple, recognizable, logo that will compete with Tinder, Bumble & Hinge. The color is pastel pink. Some logos that I think are insirational are Lyft, Apple, Nike, & Adidas.

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I'm in need of a Python backend developer, preferably a fresher, with a focus on API development and database management. The project will primarily involve working with SQL databases and leveraging the Django framework. Key Responsibilities: - API Development: Building, testing, and maintaining APIs to support various applications and services. - Database Management: Overseeing the interaction with our SQL databases, ensuring data integrity and optimizing performance. Ideal Skills: - Proficiency in Python, particularly in a backend context. - Familiarity with SQL databases, including basic query writing and database design. - Prior experience or knowledge of the Django framework. - Understanding of API structures and principles. This is a great o...

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...development for future integration use cases. UI/UX design expertise for creating a sleek and user-friendly experience. Proficiency in Stripe API integration and paywall implementation. Database management skills (MSSQL). Familiarity with SEO best practices. Experience with freemium model implementation. Bonus Skills: Experience with AI API integrations (e.g., OpenAI API) for data processing and backend automation. I need to automate much of my platform with OpenAPI and need to handle large amounts of data. I need extensive API development and a design and frontend-focused individual that can create a modern front end. Do not submit a proposal unless you are the best...

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I have an ongoing project I need to complete. Some tasks are 1. Email notification and custom templates setup 2. Push notifications 3. Some functionality fixes, front end corrections and others that will be discussed. Next js with (front-end and backend both part) typescript material UI, express js, firebase( authentication,recaptcha,firestore,firestorage).

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Project Description for Freelancer.com: JizzyAI - AI-Powered Content & Pinterest Marketing Platform Overview: Developing an AI-based platform for automating content creation and Pinterest marketing. Platform...Article/image library management Pinterest Tools Pin generator Keyword research & tracking Analytics dashboard Content performance monitoring Bulk pin data export Core Requirements AI APIs integration (Image models) Pinterest API integration WordPress API connectivity User authentication File management Data analytics Cloud deployment Technical Stack Required: Frontend: React/ Backend: Node.js Database: PostgreSQL Cloud: AWS/GCP APIs: AI models, Pinterest, WordPress Deliverables: Source code Technical documentation Deployment guide API documentation Trainin...

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We are seeking a skilled *Flutter Developer* to develop our mobile application from scratch. The project is backed by a robust *Laravel* backend, and we are looking for a professional to build the mobile app based on our provided designs and requirements. ### *Responsibilities:* - Develop the mobile application using *Flutter*, based on detailed designs provided in a Figma file. - Create and integrate custom *API endpoints* to communicate between the Flutter app and the Laravel backend. - Ensure smooth and efficient interaction between the mobile app and the backend. - Debug and optimize the code to ensure performance and scalability. - Provide regular updates on the progress and collaborate effectively with the team. ### *Requirements:* - Proven experience in...

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I'm looking for an experienced Android developer to code the front end of an application for staff attendance using face recognition. Key Responsibilities: - Implement the provided layout and design elements. - Code front end interactions based on our design document. - Integrate with provided backend APIs. All required resources will be supplied by us, including: - Backend APIs - Icons and graphics - Layout and design - MS Azure API for face recognition Main Features of the App: - One splash screen and one dashboard - Utilize face recognition for tracking staff attendance. - Interact with our APIs to fetch reports and display web views. Compatibility: - The app should work seamlessly with both old and new Android phones. Design Style: - The design will follow a ...

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...JSON parsing to help me complete a backend workflow in Bubble. The goal is to process data from QuickBooks Online’s Balance Sheet API and store specific values, such as "Total Bank Accounts" and "Total Accounts Receivable," in a Bubble database. I already have: - A working API connection in Bubble that returns the JSON response. - A backend workflow triggered by the API call. What I need help with: - Extracting specific values from the returned JSON response, such as: "Total Bank Accounts" and its corresponding balance. "Total Accounts Receivable" and its corresponding balance. - Mapping these extracted values to fields in a Bubble database Thing. - Ensuring that the backend workflow correctly processes a...

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I'm looking for an expert to help improve my site's Google PageSpeed Score, especially the Core Web Vitals. My website is built on a React framework and Gatsby. I have not implemented any optimizations yet, so this project will be starting from scratch. Ideal skills and experience for the job include: - Proven track record of optimizing Core Web Vitals - Familiarity with React and Gatsby - Demonstrable ability to achieve PageSpeed scores of 90 and above on both mobile and desktop.

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Description: I'm seeking an experienced full-stack developer to finalize and optimize my Telegram-based game built with React, Express, and Vite. The game is 99% complete with a working user login/register system, but requires critical enhancements to be production-ready. The application is currently deployed on Google Cloud Run and uses MongoDB Atlas for data storage. Current Project State: - React frontend with Vite - Express backend (serving both API and frontend) - Deployed on Google Cloud Run - MongoDB Atlas for database - Basic user authentication system - TON blockchain integration (working on PC, needs mobile optimization) Key Tasks: 1. Telegram Integration: 1. Implement full Telegram Bot API integration 2. Ensure seamless user experience within Tel...

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I need a skilled Flutter developer to implement a Material 3 UI from a Figma design into a Flutter framework. The design consists of over 11 screens and is intended for an e-commerce app. The ideal freelancer for this project should: - Have extensive experience with Flutter and Figma - Be able to translate complex designs into functional UIs - Understand the requirements for e-commerce app development Your expertise in creating interactive and user-friendly UIs will be key to the success of this project. Your ability to deliver high-quality work within the agreed timeline will be greatly appreciated. Figma:

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Overview: QSM 2.0 is a comprehensive and scalable school management system designed to streamline administrative tasks, enhance collaboration between stakeholders, and provide actionable insights for better decision-making. This platform targets educational institutions seeking efficient management of student, staff, and school operations. With an improved architecture and advanced features, QSM 2.0 delivers faster performance, seamless integrations, and enhanced user experiences. ________________________________________ Key Objectives: 1. Provide a scalable, multi-tenanted school management system. 2. Ensure high performance and faster data processing (e.g., results generation). 3. Enhance user experience with an intuitive and mobile-friendly interface. 4. Integrate AI tools to off...

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Job Summary: We are seeking talented Full Stack .NET Developers to join our team. This is a flexible opportunity, with both full-time and part-time positions available, designed to cater to professionals with varied availability. As a developer, you will contribute to building and maintaining robust, scalable, and high-performing web and desktop applications using the latest .NET technologies. Responsibilities: Back-End Development: Develop and maintain server-side components using C# and ASP.NET Core. Design APIs (RESTful or gRPC) for seamless front-end integration. Work with Entity Framework and databases such as SQL Server or SQLite for efficient data management. Ensure secure and scalable solutions through best practices in cryptography and system architecture. Front-En...

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The bot will simply execute trades based on alerts from TradingView. The trades will need to be executed on the Jupiter crypto trading platform Key Requirements: - The bot should be able to utilize Webhook alerts from TradingView. - Proficiency in Python is essential. - Previous experience with TradingView and developing trading bots will be highly regarded. - Understanding of trade execution and monitoring will be beneficial. Write "TradingView" on the first line of your bid proposal Thank you

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NDA
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I'm looking to build an interactive job hiring po...portfolios for future job offers. - Employers should primarily have access to view and search these portfolios. - Job seekers should be able to create and update their portfolios at their convenience. Ideal Skills: - Web development (preferably using a responsive framework such as Bootstrap or similar). - Experience in creating interactive, user-friendly interfaces. - Knowledge in implementing secure user sign-up and profile management systems. - Understanding of back-end development for managing and storing portfolio data. The goal is to create a platform where job seekers can showcase their skills and experiences, and employers can easily find potential candidates. Please include examples of similar projects you...

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I'm looking for a professional who can download an entire website for me. This includes all the php files, without modifying any content from the original site. The purpose of this task is to facilitate a website migration. Website URL: - The project requires you to respect the following disallow rules from the website's file: - User-agent: * - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/ - Disallow: /plus/recommend

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...clear, JSON-based format for easy integration with the frontend. Include sorting by price and basic filters (e.g., size, brand). Include features like sorting (price, relevance) and filtering (brand, size, ratings). Required Skills: Strong experience in backend development and API integrations. Familiarity with scraping technologies and tools (if necessary). Knowledge of color recognition and matching algorithms. Proficiency in working with e-commerce APIs. To keep costs low and the solution scalable, the microservice should utilize: Backend: Python (preferred), Node.js, or PHP. Data Handling: JSON-based processing, with minimal storage requirements. Deployment: Use free or low-cost cloud platforms like Heroku, AWS Free Tier, or Render. API Integration: REST-based archi...

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I'm seeking experienced backend developers and frontend designers for a project involving a custom application. The project requires: - Backend development in Python - Integration with the PayPal payment system - Designing an intuitive and engaging frontend Experience in working with payment systems and APIs is crucial. The ideal candidate would be someone who can seamlessly blend backend functionality with frontend design, all while ensuring a smooth integration with PayPal.

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1. Project Overview: SkyGuide is a web app designed to assist flight attendants and pilots by providing easy access to their union contracts. Users input questions and receive AI-generated responses based on their specific contract details. The app is near completion and will be prepared for alpha testing and promotion by March 1st, 2025. 2. Objectives: Fix existing errors and issues in the app. Implement the ability for the app to correctly call the appropriate OpenAI assistant based on the user's airline and workgroup. Ensure seamless user signup, subscription handling, and integration between Stripe and Supabase. Finalize all features and functionality to prepare for alpha testing. 3. Target Audience: Flight attendants and pilots from various airlines. Users ...

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Fix Variable Not Found Error in Migrated Yii Framework Website (PHP 7.0) Project Description: I require assistance fixing a critical issue with a website built using the framework on PHP 7.0. The website was recently migrated from cPanel to DirectAdmin, and since then, we've encountered an error message indicating a variable named $where is not found. Error Details: Error Message: PHP Notice – yiibaseErrorException: Undefined variable: where Code Snippet:: PHP $connection = Yii::$app->getDb(); $command = $connection->createCommand("SELECT id FROM product $where"); $result = $command->queryAll(); Potential Causes: Missing Variable Definition: The $where variable might not be properly defined or assigned a value before it...

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I am seeking an experienced web developer or team to build a feature-rich and fully automated Test Prep and Quiz Practice Platform. The goal is to create a scalable, user-friendly platform where users can purchase, access, and practice simulated test environments for various exams. This platform will offer a seamless experience for learners and monetize through paid access to test prep content. Key Features and Functionality: User Management: User registration and profile creation. Dashboard to track progress, performance, and completed tests. Test Prep Features: Simulated exam environments mimicking actual test conditions (e.g., time limits, navigation, question formats). Customizable quizzes by subject, topic, or difficulty level. Randomized question selection from a question ...

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I'm looking for a proficient Flutter developer who can edit a mobile app for both iOS and Android. Key Requirements: - Expertise in Flutter framework - Extensive experience in cross-platform mobile app development - We bought flutter app code in envato and we need a developer to change some codes in the app and submit the app in Apple store and Google play store

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...for a skilled frontend developer with a strong background in SvelteKit and experience with AI SaaS applications focused on image and video generation. Your main task will be to create an engaging, responsive and intuitive frontend for this application. Key Responsibilities: - Develop the frontend using SvelteKit, ensuring cross-device compatibility (Mobile, Tablet, Desktop) - Collaborate with backend developers working on the AI functionalities - Implement best practices for UI/UX design - Optimize the application for performance and scalability Ideal Skills: - Proficient in SvelteKit and JavaScript - Experience with AI SaaS applications - Strong understanding of UI/UX principles - Ability to optimize for various devices Experience with AI and SaaS development would be a signi...

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We are seeking an experienced PHP CodeIgniter developer to integrate Azure OpenAI into our existing platform. The goal is to automate question generation based on specific educational parameters like Bloom's Taxonomy, Course Outcomes (CO), and Program Outcomes (PO) and generate question papers in PDF or Word format. Project Scope: Integrate Azure OpenAI API into our PHP CodeIgniter application using the OpenAI PHP Client. Develop an AI-driven question generation system based on: Bloom’s Taxonomy (Remember, Understand, Apply, Analyze, Evaluate, Create). CO and PO Mapping for structured assessment design. Enable customizable question generation based on: Subject/topic selection Difficulty level (Easy, Medium, Hard) Question types (MCQs, Short, Long, Case-based, etc.) Imple...

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More details: What type of mixer do you need plans for? Concrete mixer What level of detail do you need for the schematics? Basic outline with key dimensions Which views do you need included in the schematics? front view, top view and 3d in corner dimensions 1400mm witdth 1200mmheight with legs without legs 800mm height on top it should have a protective mesh so nobody can fall in. mixing blades are like anchor power motor is under and shaft goes through middle 750mm up and then it goes left and right. that way no liquid can go down the shaft and leak on the motor

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Guaranteed
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More details: What type of booking functionality do you need on your website? Booking request form What information should the booking request form collect? Client contact details, Service type (clearing or cleaning), Preferred appointment date and time Who is your target audience for the C&C service? Both residential and commercial clients

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...mobile application. Week 1 Scope (MVP): - Integrate Uber's core delivery provider API for fundamental pickup/delivery booking - Implement necessary validation and error handling - Create a basic test suite - Establish a scalable architecture for future enhancements Tech Stack: - Frontend: React + TypeScript + Tailwind - Backend: Node.js/Express + MongoDB - Containerization: Docker Deliverables: - A working prototype with API integration - A basic testing framework - Comprehensive documentation - Deployment setup Key User Role: The system will cater primarily to the Customer user role. Critical Validation Checks: The essential validation checks for the system will include Payment confirmation and Delivery schedule availability. Ideal skills and experience for ...

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...color palette. The task involves transferring the screens from Miro to Figma, polishing them to achieve a professional and cohesive look, and fully leveraging the template and existing styles. It’s crucial that the screens are clear, user-friendly, and visually aligned with our initial design aesthetic. All designs must be compatible with Flutter since the project will be developed using that framework. Requirments: 1. Design Skills UI/UX Design Expertise: Strong understanding of user-centered design principles, including usability, accessibility, and responsive design. Proficiency in Figma: Demonstrated ability to use Figma for wireframes, prototypes, and advanced animations (Smart Animate, Components, etc.). Design Systems: Experience in creating or working with design s...

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I need an experienced researcher to pinpoint the 10 most cited original research articles (total 30) in ecocardiography, cardiac CT, and cardiac MRI authored by Spanish scientists. Key Tasks: - Focus on original research articles in the field of cardiovascular science. - Highlight significant contributions of Spanish researchers. - Gather data on the most cited publications. Ideal Skills and Experience: - Proficient in scientific research and analysis. - Familiar with cardiovascular research and its key areas. - Able to source from various research databases. - Excellent data compilation and presentation skills.

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I'm seeking a Shopify expert, or someone well-versed in app store optimization, to assist in collecting genuine, high-quality reviews for Ecom Wishlist Expert, our Shopify app. Ecom Wishlist Expert enables customers to create product wishlists post-login, with backend tracking of all activities. Key Responsibilities: - Guide us in gathering real, positive, and authentic reviews from Shopify merchants using our app. - Provide insights on improving our app listing, if necessary. Current Strategies: - We primarily rely on SEO techniques and influencer partnerships for our app's visibility. - Incentives for users to leave reviews include discounts and promotions. Ideal Candidate: - Extensive experience with Shopify apps and the Shopify ecosystem. - Proficient in app store ...

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...of AI in reshaping traditional business practices, emphasizing its potential to drive sustainable growth and competitive advantage. Future directions include refining AI applications for personalized customer experiences and expanding integration across diverse sectors. This research contributes to the evolving discourse on AI's role in redefining modern business models, offering a practical framework for organizations aiming to harness AI's transformative potential. Paper structure as follow (may add to it accordingly to be APPROVED BY MYSELF) Introduction • Background on artificial intelligence in business • Significance of AI in modern business models • Aim and objectives of the research • Research questions • Structure of the paper Literatur...

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...NET MVC developer to create a comprehensive management system web application. The primary purpose of this application is for business management. Key Features: - User Authentication: The system should have a secure and robust user authentication mechanism to manage user access and ensure data security. - Reporting Dashboard: An intuitive and interactive reporting dashboard is a must. The dashboard should be able to display key performance indicators and other relevant metrics in real-time. - Data Export: The application should provide an easy and efficient way for users to export data for offline analysis or reporting. Ideal Skills: - Proficient in ASP.NET MVC framework. - Previous experience in developing web-based management systems. - Strong understanding and...

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...microservices architectures. -Solid knowledge of Stripe integration. -Deep understanding of database creation in PostgreSQL. -Deep knowledge in backend API creation for chat in web system and mobile APP. -Developer needs to have the ability to quickly create complex solutions, deploy them on AWS, and contribute to the team whenever requested. -AI systems integration. -You need to know how to apply SOLID principles. -Understanding of how creating entity-relationship diagram. You can use some tool recommended for that. I need your nodejs developer do this test in three business days so that I can know his abilities: Rules for the test: Implement the backend of the screens contained in the design in the link below using these technologies and others that can add value to t...

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### **Job Profile: Angular Developer** #### **Job Overview** An Angular Developer is responsible for designing, developing, and maintaining dynamic web applications using Angular, a popular JavaScript framework for building client-side applications. They collaborate closely with back-end developers, UX/UI designers, and product teams to ensure high-performance, responsive, and user-friendly applications. --- ### **Key Responsibilities** 1. **Application Development:** - Develop and maintain single-page applications (SPAs) using Angular. - Implement reusable and modular components using Angular's component-based architecture. - Build efficient and responsive user interfaces. 2. **Collaboration:** - Work closely with UX/UI designers to translate design wire...

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I need a skilled React Native developer to make some minor modifications to my app's backend logic. The work involves: - Adjusting existing API calls - Ensuring smooth frontend integration - Utilizing local storage effectively - 4 to 5 changes only I need this job done today. Please apply only if you can start immediately and understand front-end development, local storage, and API integration.

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I'm seeking a professional Android developer to create a mobile app for , a free matrimonial service catering to Pakistanis worldwide. The app will utilize existing backend REST APIs and should mirror the simple, minimalist design of the web version. Key functionalities to be incorporated in the initial release include: - Account Registration and Management - Member Search and Selection - Communications (Messaging and Instant Chat) In addition to these, the app will also require the integration of several third-party services such as a payment gateway for subscriptions, a push notification service, and an analytics platform. The ideal candidate for this project should have: - Proven experience in Android app development - Familiarity with REST API integration - Ability to ...

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...(iOS and Android) with backend support. Referral program functionality for customers and drivers. Data security and GDPR compliance. Optional Features: Subscription model for unlimited deliveries. Analytics dashboard for restaurants to view sales data. Sponsored listings for restaurants. Deliverables: Fully functional app uploaded to the Google Play Store and Apple App Store. Admin dashboard with controls for monitoring orders, users, and payments. Complete source code and documentation for future updates. Budget: Open to competitive proposals. Please provide a breakdown of your fees and expected timeline. Preferred Skills: Expertise in developing logistics/delivery-based apps. Experience with modern frameworks (Flutter, React Native, or similar). Strong backend develo...

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I'm looking for a skilled PHP developer with Android expertise who can integrate a specific formula for calculating pathology test result value based on another test value into my existing custom-built system. This project involves both a PHP portal and an Android mobile app. Key Requirements: - PHP development for the portal - Android app development - Integration with a cu...integrate a specific formula for calculating pathology test result value based on another test value into my existing custom-built system. This project involves both a PHP portal and an Android mobile app. Key Requirements: - PHP development for the portal - Android app development - Integration with a custom-built system - Understanding of mobile app development principles - Experience with backend sys...

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