Payment gateway integration work new caledonia jobs

...update to my app. We need to facilitate a better user experience through user interface design enhancements and additional features. Key project aspects: 1. UI Design Updates: - Specifically, I want to improve the layout and navigation of my existing app. This process requires an innovative approach to enhance user experience and navigation flow. 2. Adding New Features: - Although I'm open to your expert suggestions for new features, the direction was not specified upfront. Potential freelancers must be proficient in Android development with a keen eye for intuitive, modern design. Working remotely, your ability to maintain clear communication for updates and changes on a shared session is crucial. Efficiency in task delivery coupled with meticulous attent...

I need someone who can work via anydesk and fix my issues right now my anydesk is slow so you have to be patient while working.

...webshop and an inventory management system. The project involves transferring specific order data from the webshop to the inventory system. - The type of data that needs to be transferred includes customer details, product details, and payment information. - I have the necessary documentation or specifications for the API of the inventory management system, which should facilitate this process. The ideal candidate for this job should have: - Proficient experience with API integration, specifically with Woocommerce and inventory management systems. - Ability to work with PHP and Wordpress to implement the required changes. - Good attention to detail to ensure that all necessary data is being transferred accurately. - Strong communication skills to ensure project ...

...Database Integration: The successful candidate will be responsible for integrating and managing databases to ensure seamless operation of the web application. The most important feature of this web application is user login and authentication. As such, the developer should have a proven track record of implementing robust and secure user authentication systems. Ideal Skills and Experience: - Proficiency in PHP and relevant frameworks - Strong understanding of front-end languages (HTML, CSS, JavaScript) - Experience in back-end development - Previous work on web applications with a focus on user authentication - Database management expertise - Ability to work under tight deadlines and deliver quality work This is an urgent project, so I'm looking for ...

As a DevOps developer with substantial experience in Azure, particularly in Azure infrastructure, Azure DevOps, and Azure networking, I need your immediate support in the following areas: Your responsibilities will include: - Implementing continuous integration and continuous deployment strategies. - Resolving any bugs in the CI/CD pipeline and identifying improvements. To successfully execute this project, you should: - Have 5+ years of experience in the Azure environment. - Be proficient in Azure infrastructure, Azure DevOps, and Azure networking. - Have a track record in Jenkins, GitLab, and Azure DevOps. If you possess the above-mentioned skills and experience, please apply for this project.

I'm in need of an experienced Flutter Developer who can design an application compatible with both Android and iOS platforms. Key features I'm looking to integrate are: - User Authentication - In-App Purchases At this stage, the requirements for SDK integration are open-ended as this question was skipped previously. Please recommend a suitable option you are comfortable with from the following choices: Firebase, AWS, Google Cloud, etc. Familiarity with Playstore submissions is also a must, ensuring a smooth transition from development to publishing. An ideal candidate for this role would have a solid record of creating Flutter applications for a variety of platforms, along with implementing the features listed above. Your techno-functional expertise would be crucial...

...include: - User interface customization: To improve the user experience, I aim to revamp the user interface of the software. - Custom module development: The successful candidate should have the expertise to create custom modules, catering to specific needs that go beyond the standard offerings of the software. - Integration with Bahmni: As an important aspect of this project, the candidate would need to integrate Odoo and OpenMRS with Bahmni. Having previous experience in integration with third-party software would be critical to execute and ensure seamless synchronization. The ideal candidate for this project should preferably have a robust background in working with Odoo and OpenMRS systems, Bahmni, and other renowned CRM systems. The ability to effectively improve...

As a business looking to optimize an existing site, I am searching for a talented individual to assist me in achieving a 90+ page speed scor...also needs the addition of e-commerce functionality, specifically WooCommerce. Key requirements for the job include: - Proven record of achieving high page speed scores on WordPress sites - Expertise in WooCommerce integration and setup - Ability to provide e-commerce site optimization suggestions. It's a plus if you have the following: - Experience with theme selection and customization. Although a specific theme hasn't been selected, I am open to recommendations that would benefit the page speed and overall user experience of the site. I look forward to seeing your past work on WordPress and WooCommerce integrations a...

I'm in need of a skilled patent attorney or professional who can assist me in filing a US patent application. Key Tasks: - Review my conducted patent search and assess potential patentability - Draft and file a comprehensive and legally sound US patent application for my product - Provide advice or make necessary modifications to enhance the application's chances of approval Ideal skills and experience: - Proven track record in successfully handling US patent applications - Proficiency in patent law, particularly in relation to product inventions - Strong understanding of the process and requirements for effective patent filing - Ability to conduct a thorough review of existing patent searches and translate findings into actionable steps - Excellent communication skills to guid...

Seeking a skilled programmer adept in WordPress for custom coding work and form layout adjustments. Requires proficiency in backend management, specifically relating to data capture, viewing, and exporting in Excel format. A highlight of the project entails the customization of our existing WordPress theme and the integration of new, unspecified features. Lack of detailed request emphasizes the need for a freelancer capable of intuitive problem solving. Primary tasks include: - WordPress custom coding - PDF form adjustments - Data capture and export to Excel Ideal candidate should have knowledge and experience in custom coding, WordPress navigation, and form data handling. Exceptional problem-solving skills are highly appreciated. Undefined project elements call for ...

...proficient PowerApps developer with notable experience in workflow automation, user-friendly interface design, and a background in Clinical Domain or Life Science would be beneficial. Key functionalities to be incorporated include: - Automation of complex workflows - Development of engaging and easy-to-navigate user interfaces - Incorporation of robust data visualization features - Seamless integration capabilities with other systems The successful application will cater to a micro team of 1-10 users. Freelancer should have a strong command of PowerApps, prior experience in the healthcare industry, and a portfolio showcasing relevant project experiences. Delivering on time while maintaining high-quality standards is essential. I look forward to working with a professional who ...

...developer to focus on backend development. The primary task is to integrate a payment gateway. We followed the instructions provided and implemented the following code using server-side Node.js. We utilized ngrok to enable HTTPS connections. We have successfully initiated a transaction using this code in the uploaded file. However, we encountered an issue retrieving the transaction, which should have been provided but is not available. We were advised to handle callbacks and decrypt the response, but we're facing difficulties in doing so. Handling callbacks and post-success payment URLs did not resolve the issue. We now need the transaction ID, which we are unable

description I want a basic demo using OpenAI assistants API and its retrieval function. Will provide OPENAI ID and assistants id 2.1 a web UI to chat with 2.2 a specific file which is provided as knowledge file(will provide it below) 2.3 Use Simplied Chinese to chat Prototype: Screen shot attached. Beijing Time April 20st 21:00 pm As a demo, could deploy to Azure or your server. But needs full source code. knowledge file the PDF file will be provided.

I'm in search of a skilled and experienced social media manager to kickstart my new brand's online presence. The main platforms I'm targeting are Facebook, Instagram, Twitter, and TikTok. Key Responsibilities: - Develop and implement a comprehensive social media strategy to increase brand awareness, drive website traffic, and generate leads amongst the millennial audience. - Create engaging content, including posts, stories, and videos that will resonate with this demographic. - Monitor and respond to comments and messages in a timely and professional manner. - Utilize analytics tools to track the performance of our social media efforts and make data-driven decisions to optimize our strategy. Ideal Skills and Experience: - Proven track record in building successful ...

I'm looking for a WordPress expert who can help me develop a website for my Wedding Banquet services. The site needs to include the following pages: - Home page - About Us page - Services page - Gallery - Contact form The site must be designed to showcase our offerings and provide ...designed to showcase our offerings and provide information to potential clients, so it must be aesthetically pleasing, easy to navigate, and user-friendly. Ideal skills and experience for this job include: - Proficiency in WordPress - Strong understanding of UI/UX principles - Experience with contact form integration - The ability to design a visually appealing site, ideally with a style similar to Please include samples of relevant past work in your proposal.

I'm searching urgently for an experienced PHP architect who can construct a unique e-commerce shopping cart and accompanying admin panel. Key Res...and smooth transaction process. - Developing order management and inventory tracking system within the admin panel to help me keep track of orders and product stocks. Skills and Experience Required: - Proficient in PHP programming - Experience in developing e-commerce websites - Solid understanding of databases and SQL - Familiarity with different payment solutions Although there is no specific requirement for payment method integration at the moment, the ability to seamlessly add these in the future is essential. My project requires immediate attention and the chosen freelancer needs to be able to commit and de...

I am looking for a versatile developer to create an ecommerce application that will run on both iOS and Android. The application must include the following features: - Facilitate user re...application that will run on both iOS and Android. The application must include the following features: - Facilitate user registration and profile management - Allow product listing and search capabilities - Include a functional shopping cart and checkout process An imperative aspect of this project is the integration of external payment gateways to support the checkout process. It's therefore essential for the ideal candidate to have previous experience with payment gateway integration. The ability to cross-code for both Android and iOS platforms is essential d...

...interface. **Key Integrations:** - **Messaging Platforms:** WhatsApp, Facebook Messenger, email, and SMS. Additionally, PBX system integration is required to bridge our voice call capabilities with digital communication channels. - **Features:** Essential features we're looking for include: - **File Sharing:** Ability to share documents, images, and videos across all channels. - **Chat History:** Seamless access to previous conversations for context and continuity in customer support. - **Chatbot Integration:** Capability to integrate AI chatbots for automated responses and assistance. **Ideal Skills and Experience:** - Experience with API integration for WhatsApp, Facebook Messenger, email, SMS, and PBX systems. - Proficient in developing ch...

I'm looking for a professional Shopify developer who...reflects my brand's aesthetics and values - A responsive design that ensures seamless user experience across all devices - User-friendly navigation that makes it easy for visitors to find and purchase products Regarding the product search functionality, the new website should offer: - Autocomplete search suggestions to help users find what they need faster - Advanced filters and sorting options for a more refined search experience - Improved search accuracy to ensure that users are directed to the right products Lastly, the integration of a robust fraud detection system is a non-negotiable. Your experience in this area will be paramount to the success of this project. I look forward to discussing this further ...

I need a skilled developer to integrate an International Payment Gateway into my PHP-based website immediately. Integration of Payment Getway in the website which will accept USD and this should work in Both Indian people and Other Countries. Website URL is - freelancerbridge(dot)com

I am in search of a professional web developer who can create a modern, eye-catching corporate website for me. The pivotal features identified for this website are a well-organized project showcase and a usable contact form. Ideal Candidate: - Proficient in creating impressive project showcases to demonstrate the potential of our business - Ability to integrate a user-friendly contact f...interactive contact form. The site's design should harmonize with our corporate image, yet stand out in a saturated market. Your creativity, attention to detail, and technical proficiency will be invaluable to achieving this goal. Skills Needed: - Web development - UX/UI design - Knowledge of modern design aesthetics - Experience with project showcase design - Proficiency in form creation and ...

I'm looking for an expert who can streamline our payment matching process by integrating Xero with our Procurement system. Key Requirements: - **Manual Matching Override Capability**: The ability to manually match transactions is crucial as it allows us to handle exceptions and discrepancies effectively. Current Discrepancy Handling: - Discrepancies between the systems are currently addressed via manual review and adjustment. The integration should help minimize these instances and make the process more efficient. Ideal Skills and Experience: - Experience in integrating Xero with Procurement systems is a plus. - A good understanding of financial processes and payment matching. - Ability to develop a system that allows for manual override matching. - Prove...

- Please do not apply if your English level is not at least near-native. - Please do not apply if you have not worked within this industry previously - We operate on PST time. Please look this up before applying. ------------------- Engage in 1-on-1 conversations with subscribers on OnlyFans. Foster a positive and engaging atmosphere to keep subscribers entertained and coming back. Provide regular updates and feedback to the team. ------------------- - Must be 18+ - Must have at least a near-native level of English - Have a stable workstation and Internet connection - Comfortable viewing and selling explicit content - Ability to build virtual girlfriend experience with subscribers - Must understand the Psychology behind OF chatting ------------------- - We offer 6 hour shifts in a c...

I have ongoing work related to our previous project 'Brochure Design for Digital Platforms'

I am in need of a skilled Django Developer to work with my team in my office in Delhi on a 4-week contract or less. Key responsibilities: - Collaborate on the development of a Django application - Implement and maintain a secure, efficient and scalable back-end - Integrate APIs as and when required Skills required: - Strong expertise in both back-end and database management - Proficiency in Django - Experience with secure and efficient code - Efficiency in API Integration and Django Rest Framework Please note that this position requires onsite presence in Delhi, so only those who can commit to this requirement should apply.

I have an unfinished Flutter app that requires a skilled individual to handle its database connection. The app...and now, I need help connecting it to a MySQL database using an API. Key Responsibilities: - Complete the database connection for my Flutter app - Utilize MySQL to store the following data types: user profiles and authentication, transactional records, content and multimedia files Ideal candidate: - Proficient in Flutter and experienced in developing Flutter apps - Skilled in MySQL and API integration - Familiar with handling user data and transaction records securely - Strong background in data storage and retrieval for content and multimedia files This project is not for a business, but rather a personal venture. Your expertise will help me bring my app to its full ...

Overview: We are excited to announce our initiative to expand and diversify our business clientele. As a dynamic and innovative company, we are constantly striving to enhance our market presence and drive sustainable growth. In line with this vision, we are actively seeking new business accounts to partner with us in our journey towards mutual success. Objective: The primary goal of this project is to identify and acquire new business accounts that align with our values, objectives, and expertise. By expanding our client base, we aim to: Increase revenue streams and profitability. Enhance market reach and penetration. Strengthen brand recognition and reputation. Foster long-term partnerships and collaborations. Target Audience: We are targeting businesses across various ind...

...to find wordpress plugin and make integration to my website with below detail. reservation system 1. hourly base reservation as we always work at night, today as ours is starting from 5pm until 4am next morning 2. duration (how many hours) and number of people per reservation when request reservation 3. able to post only limited rooms to online (we will make availability with only 3 salas out of 7 salas on online) 4. back end, admin has no limit to post reservation even out of open hours 5. Admin (Backend) able to move reservation hour or reduced / extend duration 6. clients can't change reservation after confirmed or can't cancel 7. reservation status showing either by color or text (sala unassigned/arrived/left) 8. able to work with stripe (payme...

I'm looking for an expert developer to build an e-commerce website targeted at selling dig...your role will include: • Website Development: Designing and setting up an e-commerce site using modern UX/UI principles for easy navigation and accessibility. • Payment Gateway Integration: Incorporating PayPal as an integral part of our site to process transactions smoothly. • Products Display: Designing an engaging display for our digital products to promote sales. Ideal candidates should have: • Extensive experience with creating e-commerce websites. • Proven experience integrating PayPal into a website. • Experience in digital product display and management. Your success will be gauged by the seamless integration of the paym...

...interactive websites. The developer will be responsible for building a feature-rich website that offers fare comparison between major ride-sharing companies, provides valuable content through a blog, and fosters community engagement through a dedicated forum. Skills and Requirements: Proficiency in WordPress development, including theme customization and plugin integration. Experience with HTML, CSS, JavaScript, and PHP. Ability to work with REST APIs to fetch and display real-time fare data from major ride-sharing companies. Knowledge of SEO best practices to ensure the website's visibility and search engine optimization. Familiarity with forum plugins to create a robust and engaging discussion platform for riders and drivers. Excellent problem-solving skills and a ...

I need a robust StarCloud print feature integrated to my website through PHP. I require an expert in PHP who understands how to efficiently generate receipts directly from a website. Key Features Required: - Personalized receipt print...generate receipts directly from a website. Key Features Required: - Personalized receipt printing: Upon a successful order, a receipt should be generated for that specific transaction. - Simplified design: The receipt should be simple, uncluttered and easy to read. Please note, only the code is needed, no additional information like payment or customer details should be included. Ideal skills and experience: - PHP proficiency to ensure seamless integration - Familiarity with StarCloud system - Understanding of efficient coding practices fo...

Project Objective: Develop a user-friendly online platform that provides essential PDF and image management tools, akin to established services like Smallpdf and iLovePDF. Target Audience: Individuals and businesses of... 6. Hosting: Choose a reliable web hosting solution with sufficient bandwidth to handle user traffic and file uploads, considering cloud hosting for scalability. Project Deliverables: 1. Fully functional website with core PDF and image manipulation functionalities. 2. Responsive design ensuring optimal viewing on various devices. 3. SEO optimization strategy and initial implementation. 4. Integration with Google Adsense (subject to approval based on Google's guidelines). 5. User interface wireframes or mockups for approval (optional). 6. Clean and well-docum...

I'm in need of a seasoned developer with experience in Hubspot software development. The project will entail incorporating key features such as contact management, email marketing and lead generation into the Hubspot platform. Key requirements of the project include: - Integration of contact management feature to accurately store information. - Utilize the email marketing feature effectively for targeted campaigns. - Ensure the lead generation feature is robust and functional. In addition, the software should be compatible with key platforms and integrations like Salesforce, WordPress, and Shopify. Ideal candidates should have: - A profound understanding of Hubspot software. - Demonstrable experience in developing similar features. - A knack for integrating software with va...

...aim of the video ad is to promote the new release to hardcore gamers. Key Requirements: - The video should be engaging and fun, capturing the essence and excitement of the game. - The style should be casual and accessible, appealing to the hardcore gaming community. - Utilize the gameplay clips I've taken to create a high-energy, captivating narrative. Ideal Skills and Experience: - Proven experience in creating video ads, particularly in the gaming industry. - Proficiency in video editing software and techniques. - Ability to understand and cater to the preferences of hardcore gamers. I'm looking for a freelancer who can bring fresh and creative ideas to the table, and deliver a high-quality video that will drive interest and excitement for the new game rel...

...interactive websites. The developer will be responsible for building a feature-rich website that offers fare comparison between major ride-sharing companies, provides valuable content through a blog, and fosters community engagement through a dedicated forum. Skills and Requirements: Proficiency in WordPress development, including theme customization and plugin integration. Experience with HTML, CSS, JavaScript, and PHP. Ability to work with REST APIs to fetch and display real-time fare data from major ride-sharing companies. Knowledge of SEO best practices to ensure the website's visibility and search engine optimization. Familiarity with forum plugins to create a robust and engaging discussion platform for riders and drivers. Excellent problem-solving skills and a ...

Description: I'm seeking an experienced AWS and Django developer to urgently fix a "502 Bad Gateway" error that started occurring on my Django-based website hosted on an AWS EC2 instance after an IAM role change. The task will also involve reviewing and revoking AWS access previously granted to a developer, and ensuring the site's security and integrity. Responsibilities: Diagnose and resolve the "502 Bad Gateway" error. Review and modify IAM permissions to ensure both security and functionality. Confirm that all components of the AWS environment (like EC2, RDS) are properly configured and interacting without issues. Ensure the Django application is securely configured and fully operational. Provide a brief report on the changes made and any re...

I am in need of a Telegram bot that can provide user registration and efficiently store and retrieve data from a Firebase database. Key Responsibilities: - Implement a user registration system directly on the Telegram bot interface itself. - Develop a clear and efficient data storage and retrieval process from the Firebase database. - Ensure that the bot can handle user profiles, user activity logs, and applications in the database. Ideal Skills and Experience: - Proficient in Python, especially for developing Telegram bots. - Extensive experience working with Firebase databases. - Prior projects that involve implementing user registration systems. - Strong understanding of data storage and retrieval systems. - Good communication skills to ensure the system is implemented as needed.

...skilled developer to enhance the online appointment and payment system on my website. - **Current System**: We are currently using Fittlebug for our online appointment scheduling system. The new system will need to be compatible and integrated with this existing platform. - **Key Features**: We aim to incorporate the following features into the new system: - Real-time Availability: Customers should be able to see real-time availability and book accordingly. - Automatic Reminders: The system should automatically send reminders to customers before their appointment. - Payment Integration: The system should facilitate payment for appointments. - **Payment Integration Details**: Although we're considering integrating an o...

Looking for a Google Cloud Platform (GCP) expert who can assist with Cloud Functions and Vision API integration and deploy function on google cloud - Your main focus will be integrating Vision API for images batch processing and setting up Cloud Functions. The urls of images will be in excel file in google cloud. The parse result to be placed in columns next to url column. - The data primarily processed with text detection. Ideal Candidate: - Proficient in GCP services, specifically Cloud Functions and Vision API. - Experienced in setting up GCP services for one function. - Skilled in implementing Vision API for image processing. - Strong understanding of data processing in GCP.

I'm seeking an experienced web developer with extensive knowledge in WIX and payment gateway integration to build the checkout system of our bulk ice selling business' website. Key tasks include: 1. **Payment Gateway Integration**- The checkout system should incorporate a payment gateway to facilitate secure transactions. 2. **Delivery Address Input** - Allowing customers to input their delivery address to ensure proper and accurate delivery of our products. 3. **Order Confirmation Email** - After a successful purchase, an order confirmation email should be sent to customers for their records. 4. **Design** - Implement a simple and clean design that aligns with the website's current aesthetic. 5. **Delivery Track...

I'm looking for an expert to design and implement an ecommerce website for my Kansas-based CBD business. Key Features: - The website should have a product c...looking for an expert to design and implement an ecommerce website for my Kansas-based CBD business. Key Features: - The website should have a product catalog to display my 50-100 CBD products. - It should include a shopping cart feature for seamless transactions. - Integration of payment gateways, specifically credit/debit cards and PayPal, is crucial for the website's functionality. Ideal Applicant: - Proven experience in ecommerce website design, specifically with product catalogs. - Proficient in shopping cart and payment gateway integrations. - Understanding of the legalities around sel...

Looking for an experienced developer familiar with Cordova v12 and AdMob to implement ad functionality into my Android app. I need: - Banner ads to be placed at the top of the screen - Interstitial ads to appear every time a user opens the app The ideal candidate will have prior experience working with AdMob and Cordova, and is knowledgeable about user interface design to ensure the ads integrate seamlessly into the app's existing design and functionality.

...Python, Java, and C++ to develop a small-scale software program primarily aimed at automating a specific task. The task itself is relatively simple, but the automation of it is critical to increase efficiency. Key aspects of the project: - The software program must be designed to automate a specific task. It's crucial that the programmer fully understands the task at hand to ensure a seamless integration of automation. - The scope of the project is small-scale, so the focus is on developing a functional, efficient automation solution. - Proficiency in Python, Java, and C++ is non-negotiable. The software is expected to be developed using these languages. Ideal skills and experience: - Proficiency in Python, Java, and C++ - Prior experience in developing automation softwa...

...Wordpress website design - Proficiency in using business website templates - Experience in embedding interactive multimedia elements - Portfolios displaying relevant experience and creativity Deliverables: - A fully-adaptive Wordpress website built using a business template - Implementation of interactive multimedia elements for a fun and engaging site - Logo and brand integration Kindly share examples of your previous work when bidding. Please note, the template should allow for a high degree of interactivity and audience engagement. Below is the content: Smart Sustainability Home of best sustainability creatives. What we do: We help our clients make money. Services: in 3 words Revenue generation services. Why us: We bring money, with no advance payments ...

I'm looking for an expert programmer proficient in Node, The bot was created to scrape coins from my Telegram group via API integration but currently, it isn't purchasing as expected. Specifically, I'd require someone who could: - Identify and fix the issues that prevent it from purchasing and selling the scraped coins. - Make sure the bot interacts properly with the Latoken cryptocurrency exchange. This task would suit someone with a strong background in bot programming, API operations, web scraping, and experience dealing with cryptocurrency exchanges, particularly Latoken. Knowledge of crypto trading bots' operational peculiarities would be a major plus. Your task would be to get it back to working condition, ensuring all functions operate as they should. T...

I need a Joomla plugin developer to create a payment plugin specific to J2Store. Skills and Experience: - Joomla Plugin Development - Extension Specific for J2Store - API payment integration

I'm looking for an expert programmer proficient in Node, The bot was created to scrape coins from my Telegram group via API integration but currently, it isn't purchasing as expected. Specifically, I'd require someone who could: - Identify and fix the issues that prevent it from purchasing and selling the scraped coins. - Make sure the bot interacts properly with the Latoken cryptocurrency exchange. This task would suit someone with a strong background in bot programming, API operations, web scraping, and experience dealing with cryptocurrency exchanges, particularly Latoken. Knowledge of crypto trading bots' operational peculiarities would be a major plus. Your task would be to get it back to working condition, ensuring all functions operate as they should. T...

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

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