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We want to add a few features on our existing website such as: • File Transfer • Meeting Scheduler • QR Code Generator • AI Post Generator • AI Digital Business Card creator • Document E-Sign tool need an experienced developer with the following experience: A senior full-stack developer or a full-stack product engineer with experience in: front-end user interfaces back-end APIs database design cloud file storage third-party integrations security payment/subscription logic AI API integration - how to call AI Apis, totken , cost control, installment limits, moderation, etc You MUST know should know how to integrate external services such as: OpenAI API for AI Post Generator calendar APIs email sending tools PDF generation libraries QR code cloud file storage APIs To create the Meeting Scheduler, you should understand: time slots timezone conversion booking availability blocked dates reminders calendar integrations conflict prevention and for SECURITY you MUST understand input validation file upload security malware risk control SQL injection prevention XSS/CSRF protection access control rate limiting password-protected downloads Lastly you must be an independent freelancer with atleast 10+ years of experience in development. and you are 100% confident you can do this work
Project ID: 40303619
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Active 1 mo ago
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174 freelancers are bidding on average $198 CAD for this job

I just went through your project details, I will build all six features on your existing site: file transfer with secure uploads, meeting scheduler with timezone handling and conflict prevention, QR code generator, AI post generator via OpenAI API, AI digital business card creator, and a document e-sign tool with PDF generation. For the AI features, I will set up token budgets and rate limiting per user so API costs stay predictable. Without these controls, a single heavy user can spike your OpenAI bill unexpectedly. I will also add content moderation before any AI output goes live. Questions: 1) What is the current tech stack of the existing website (PHP/MySQL, or something else)? 2) Should the file transfer support password-protected downloads, or is logged-in access enough? Let me know if you have any questions. Kamran
$120 CAD in 5 days
8.5
8.5

Hi, With a staggering 10+ years of experience in full stack development, I am Asad, committed to meeting all your website's needs with utmost confidence. Your project requires not only an AI developer, but also someone with an array of skills in UI/UX design, API integration, security and more - which is where I believe I truly stand out. I’ve worked extensively on front-end user interfaces, back-end APIs, database design, and cloud storage for data files. Apart from this, my experience in integrating third-party services extends to calendar API's and email sending tools - making me more than capable of handling the QR Code and Meeting Scheduler features you desire. Moreover, having implemented payment/subscription logic in the past also enables me to understand the nuances of your project on another level. Regarding intelligence security management, rest assured as that's an aspect I value deeply too. My proficiency in prevention strategies such as input-validation techniques, password-protected download methods, and efficient rate limiting will ensure your data stays safe and protected. My wide range of technical expertise includes proficiency in `Post Generator using OpenAI API`, encapsulating events such as instant document e-signatures or QR Code generation won't be cumbersome for me either. So why not team up and leverage my skill-set to bring these valuable functionalities to your website? Together we can create magic! Thanks!
$75 CAD in 3 days
8.3
8.3

Hello, I have carefully reviewed your requirements for enhancing your website with features like File Transfer, Meeting Scheduler, QR Code Generator, AI Post Generator, AI Digital Business Card creator, and Document E-Sign tool. These features demand robust full-stack expertise, particularly with AI API integrations and stringent security measures. With over 10 years of experience as a senior full-stack developer, I specialize in front-end and back-end systems, cloud storage, and secure API integrations including OpenAI, calendar APIs, and PDF generation tools. I follow best practices for security aspects such as XSS, CSRF, and malware risk control. I can ensure seamless timezone handling and booking conflict prevention for the scheduler using reliable calendar integrations. I propose completing this project within 21 days. Let's discuss the specific AI APIs and services you're currently using to align the integrations precisely. Could you share which AI APIs or existing services you currently use or prefer for these features? Best regards, Muhammad
$2,000 CAD in 21 days
8.2
8.2

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards!
$250 CAD in 7 days
8.2
8.2

I HAVE BUILT SIMILAR FULL-STACK WEB PLATFORMS WITH AI FEATURES, FILE MANAGEMENT, SCHEDULING SYSTEMS, AND SECURE DOCUMENT WORKFLOWS INTEGRATED WITH THIRD-PARTY APIS. With 11+ years of full-stack development experience, I can implement these features into your existing platform while ensuring strong performance, security, and scalable architecture. Core Features Implementation: • **Secure File Transfer system** with cloud storage and protected downloads • **Meeting Scheduler** with time slots, timezone handling, availability logic, reminders, and calendar integrations • **QR Code Generator** and dynamic sharing tools • **AI Post Generator** using OpenAI API with token control, moderation, and usage limits • **AI Digital Business Card creator** with shareable profiles and QR access • **Document E-Sign tool** with PDF generation and secure signing workflow Technical Capabilities: • Frontend UI development for smooth user experience • Backend APIs using PHP/Java with structured database design (MySQL) • Third-party integrations (OpenAI, calendar APIs, email systems, PDF libraries, cloud storage) • Payment/subscription logic if required Security Implementation: • Input validation, file upload protection, and malware prevention • SQL injection, XSS, and CSRF protection • Role-based access control and
$140 CAD in 7 days
8.0
8.0

Woah Hello, It looks like you’re looking to enhance your website with a variety of features, including file transfer, a meeting scheduler, and AI tools like a post generator and business card creator. With 7+ years of experience in full-stack development, I’m confident in my ability to tackle these tasks effectively. For the meeting scheduler, I’ll ensure that time slots, timezone conversions, and booking availability are seamlessly integrated. Security is also a top priority; I understand the importance of protecting user data and can implement robust measures against threats like SQL injection and XSS. I have a solid grasp on integrating various APIs, including OpenAI for your AI features and cloud storage for file management. I’m ready to help you take your website to the next level with these enhancements. Best regards, Ivan Mandinski
$140 CAD in 7 days
7.4
7.4

Hello, I'm Rekha, a highly experienced full-stack developer with over a decade of experience who loves to create solutions that not only meet client expectations but also drive real value for end-users. From your project description, it's clear that you need an accomplished developer who’s comfortable with a wide range of tasks and that's where I come in. From front-end to back-end, databases to cloud storage, and security to payment logic I've got you covered. When it comes to AI API integration, I'm no stranger. To name a few, Open AI API for AI Post Generator, cloud file storage APIs, calendar APIs - been there and done that. Not only do I have the hands-on technical knowledge, but also the strategic mindset to ensure effective use of these services while staying within the required bounds such as costs limits and moderation measures. Moreover, my extensive experience in security is going to be vital for your project. I understand all aspects of safeguarding your platform including input validation, file upload security, malware risk control, SQL injection prevention, XSS/CSRF protection among others. My code is clean and well-documented which makes it easy for other developers if they ever need to jump in. Let's discuss how we can take your website to the next level together!!! Thank you!!!
$250 CAD in 7 days
7.9
7.9

Hi, Your requirement to extend your existing platform with features like File Transfer, Meeting Scheduler, AI tools, QR Generator, E-Sign, and Digital Business Cards is clear, and it aligns well with my experience building full-stack web platforms with third-party integrations and AI services. I’m a Full Stack Developer with 5+ years of experience in PHP, MERN, and MEAN stack, working on complex systems that involve APIs, cloud storage, payments, AI integrations, and secure data handling. For your project I can help implement: Secure File Transfer system with cloud storage integration and protected downloads Meeting Scheduler with time slots, timezone handling, booking logic, reminders, and calendar API integration AI Post Generator using OpenAI APIs with token control, moderation, and usage limits AI Digital Business Card creator with export and sharing capabilities QR Code Generator for links, profiles, or files Document E-Sign system with PDF generation and signature tracking Security will be handled carefully with input validation, XSS/CSRF protection, SQL injection prevention, access control, and rate limiting, especially for file uploads and AI usage. I focus on clean architecture, scalable APIs, and secure integrations so these features integrate smoothly with your existing system. I’d be happy to review your current platform and discuss the best architecture for implementing these modules. Best regards. Bhargav
$140 CAD in 7 days
7.0
7.0

Integrating advanced features like AI tools, file transfer, and a meeting scheduler is no small feat. You’re looking for someone who not only knows the tech but can ensure seamless user experiences with robust security. Having over ten years in development, I've navigated everything from AI integrations to crafting secure, responsive interfaces. Previously, I integrated an AI Post Generator using OpenAI and developed a scheduling system with timezone and conflict management. Security is a constant priority; I've implemented comprehensive measures against XSS and SQL injection in past projects. How do you envision the user flow for the meeting scheduler? Would love to hear your thoughts and start making this a reality. Let's chat further—I'm ready to dive in!
$250 CAD in 7 days
6.5
6.5

Hello Sir, Would you like to see a demo of our exceptional solution even before making any commitments? As a senior full-stack developer with over 10 years of experience, I specialize in seamlessly integrating cutting-edge features like file transfer, meeting schedulers, and AI tools tailored to enhance user experience while securing sensitive data. I invite you to discuss how we can bring your project vision to life with a detailed plan and demo that showcases my expertise. Regards, Smith
$140 CAD in 7 days
6.6
6.6

With over a decade of experience as a seasoned Full Stack Developer and Software Engineer, I have had the privilege to build and deliver scalable digital products across numerous industries, consistently providing intuitive user experiences. From my technical skill-set, ranging from front-end design (such as HTML, CSS, and JavaScript) to back-end development (PHP, Node.js), I am confident in my ability to bring your vision to fruition. My proficiency in third-party integrations (particularly API integration) aligns perfectly with your need for external systems such as OpenAI API for AI Post Generator and calendar APIs for the Meeting Scheduler. Additionally, my familiarity with cloud file storage APIs and necessary security measures like input validation, file upload security, malware risk control, SQL injection prevention among others uniquely positions me to handle the specific project requirements you've outlined. What distinguishes me is not just my technical expertise but also my problem-solving mindset and practical approach during project development. With efficiency in mind, I adopt Agile/Scrum practices, ensuring thorough planning and effective client communication at each developmental stage. My leadership skills will also come in handy should the project require coordination with other team members. Together we can bring these sophisticated features on your existing website to life!
$150 CAD in 12 days
6.9
6.9

With over a decade of sheer dedication to varied technologies, including robust experience in AI development, I am thrilled to offer my services for your project. My skillset resonates perfectly with what you're seeking - front-end user interfaces, backend APIs, database design, cloud file storage, third-party integrations, security, and much more. With me on-board, you gain the expertise of a professional who knows the ins-and-outs of creating and integrating the kind of features you're looking for. Some of my notable achievements include leveraging OpenAI API for creating AI-powered solutions like Post Generator that resonates well with your requirements. I'm well-versed in integrating external services such as calendar APIs, email sending tools, PDF generation libraries and more. Furthermore, I fully understand the significance of security in this digital age and have implemented stringent measures throughout my career such as input validation, file upload security, SQL injection prevention just to name a few. I assure you top-notch quality work with utmost efficiency and an error-free codebase. Moreover, I'm known for my initiative taking characteristics which means you can depend on me to handle complex requirements independently while delivering timely results. Looking forward to discussing further how we can make your project a spectacular success! Thanks, Jay
$140 CAD in 7 days
6.7
6.7

As a seasoned full-stack developer with over 10 years of hands-on experience, I firmly believe that my skills and expertise make me the best fit for your AI development project. My proficient knowledge in front-end user interfaces, back-end APIs, database design, and more aligns directly with your outlined requirements. At SoftwareLinkers, we've built and integrated numerous complex features like file transfer, scheduling tools, QR code generation, AI post generation, document e-signatures and many more. Integration with external services is our bread and butter at SoftwareLinkers. Using APIs effectively and efficiently is crucial in any project, this includes OpenAI API for the AI post generator as well as calendar APIs or QR code integration, all within the provided budget scope and without compromising on security. Security is also of utmost importance to us. I have extensive knowledge in ensuring input validation, file upload security, SQL injection prevention, XSS/CSRF protection and more. We prioritize building systems that are secure,staying up to date with the latest safety measures. At SoftwareLinkers, we do not just write code; we understand your business goals thoroughly to design reliable systems and build solutions that are scalable and future-oriented while adhering to strict deadlines.
$200 CAD in 10 days
6.5
6.5

Hello, Having been in the field for over a decade, I have identical experience to the skill set you've outlined. My core competency is developing AI-powered web & mobile applications, integrating Machine Learning models as well as constructing scalable backend systems. Such interface will be useful for the mentioned features including QR Code Generator, File Transfer and Meeting Scheduler. I also have significant experience in utilizing OpenAI API for tasks such as Post Generation – which could be employed for an 'AI Post Generator' for you. A recent example includes my work on an invoice scanning system powered by AI, demonstrating a strong ability to turn ideas into code with real business value. Additionally, security is a top priority in any online project, and I'm well versed in measures to prevent SQL injection, XSS/CSRF attacks and provide rate limiting to secure your platform. I can assure that protection of data uploaded, AI API control and moderation will remain tight by implementing strong input validation and file measures with appropriate encryption. I commit to providing long-term support and collaboration even after initial development stages are complete. Your project fits well within my vast skill set and passions; let's embark together on this journey to build something smart and impactful!
$250 CAD in 7 days
6.6
6.6

Hi There!!! ★★★★ ( Full-Stack AI Feature Integration for Website ) ★★★★ I read your project and understand you need an experienced developer to add features like file transfer, meeting scheduler, QR code generator, AI post and digital business card creators, and document e-sign, with strong focus on security, API integration, and cloud storage. ⚜ File transfer and cloud storage integration ⚜ Meeting scheduler with timezone, availability and reminders ⚜ QR code generator ⚜ AI post and digital business card creation using OpenAI API ⚜ Document e-sign tool ⚜ Secure backend with input validation and access control ⚜ Payment/subscription logic and third-party API integration I have 10+ years experience as full-stack developer, integrating AI APIs, secure file storage, and complex backends. I enjoy building robust, user-friendly features that work seamlessly. My approach is to design secure APIs, integrate AI services with cost controls, implement scheduler logic, and ensure full end-to-end security for all features. Happy to discuss details and start immediately. Warm Regards, Farhin B.
$110 CAD in 10 days
6.5
6.5

Hi! I have over a decade of experience as a full-stack developer, building complex web platforms with secure front-ends, robust back-ends, and scalable database architectures. I can implement all of your requested features—including file transfer, meeting scheduler with timezone-aware availability and reminders, QR code generation, AI-powered post creation, digital business cards, and document e-signing—while integrating OpenAI, calendar APIs, email tools, cloud storage, and PDF libraries. Security will be baked in from the ground up with input validation, malware/file upload safeguards, XSS/CSRF protections, and access control. I am confident I can deliver a polished, secure, and maintainable platform that meets your requirements end-to-end. Looking forward for your positive response in the chatbox. Best Regards, Arbaz M
$140 CAD in 3 days
6.4
6.4

Hi, I understand that you want to enhance your existing website with several functional modules including file transfer, meeting scheduling, QR code generation, AI content tools, digital business cards, and a document e-sign feature. My approach would be to design modular backend APIs and secure frontend interfaces that integrate external services such as OpenAI for AI content generation, calendar APIs for scheduling, and cloud storage for secure file transfers. I would implement features such as time slot management, timezone handling, and booking conflict prevention for the scheduler, while ensuring strong security through input validation, access control, rate limiting, and protection against common threats. Pre-delivery testing will include functional validation of each module, API integration checks, security testing for uploads and downloads, and performance verification to ensure reliability and scalability. Best, Justin
$140 CAD in 7 days
6.0
6.0

Hello,! I’m excited about the opportunity to help with your project. Based on your requirements, I believe my expertise in PHP, HTML, MySQL aligns perfectly with your needs. How I Will Build It: I will approach your project with a structured, goal-oriented method. Using my experience in PHP, Java, MySQL, HTML, Full Stack Development, Security, Database Design, API Integration, AI Development, I’ll deliver a solution that not only meets your expectations but is also scalable, efficient, and cleanly coded. I ensure seamless integration, full responsiveness, and a strong focus on performance and user experience. Why Choose Me: - 10 years of experience delivering high-quality web and software projects - Deep understanding of PHP, HTML, MySQL and related technologies - Strong communication and collaboration skills - A proven track record — check out my freelancer portfolio. - I’m available for a call to discuss your project in more detail - Committed to delivering results on time, every time Availability: I can start immediately and complete this task within the expected timeframe. Looking forward to working with you! Best regards, Ali Zahid Canada
$30 CAD in 7 days
5.9
5.9

Hello, I hope you're doing well! I'm a Top-Rated Full-Stack Developer with 12+ years of experience delivering scalable, high-quality digital solutions. I’ve completed 100+ projects across Node.js, Python (Django/Flask), PHP (Laravel, CodeIgniter, Yii2), React/Vue/Angular, Shopify & E-commerce, and Mobile Apps (React Native, Flutter). My clients value my reliability, communication, and commitment to deadlines. Why I’m a Great Fit: > I carefully review project requirements to ensure full clarity. > I deliver clean, maintainable, and scalable code. > I break complex tasks into structured milestones with regular updates. > I work seamlessly across time zones using Jira, Asana, and Basecamp. What I Can Deliver: > Full-Stack Web & Backend Development (APIs, Platforms) > E-commerce & Marketplace Solutions (Shopify, WooCommerce, Magento) > Mobile Apps (React Native, Flutter) > AI/ML Integrations, Chatbots & Analytics > DevOps (AWS, Docker, CI/CD), Testing & QA > UI/UX Support & Technical Consulting Best regards,
$250 CAD in 4 days
6.0
6.0

Hi, ⚡ Full-Stack AI Developer | 10+ Years | All 6 Features, Zero Compromise I've built exactly this stack before — file transfers with malware scanning, timezone-aware meeting schedulers, QR generators, AI post/business card creators with token cost controls, and PDF e-sign flows. I handle OpenAI integration, calendar APIs, cloud storage, SQL injection/XSS/CSRF protection, and subscription logic end-to-end — independently, clean, and production-ready.
$200 CAD in 2 days
5.8
5.8

Surrey, Canada
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