Chargebee gateway cannot be usedpekerjaan

I'm in need of a skilled Python developer to create a custom Telegram bot for me. This bot will primarily focus on automated messaging. Key requirements: - (((meeting will be in person in Kuwait))) - The bot should be programmed in Python / any - It should be able to send automated messages - integrate payment gateway - Messages include, but aren't limited to, welcome messages for new users, notifications for updates, and reminders for appointments Please consider the following skills and experiences for this project: - Strong proficiency in Python, with a good understanding of its libraries and frameworks - Experience in developing Telegram bots specifically - A solid grasp of automation and scripting - Prior work with automated messaging syste...

...improve the overall aesthetic and usability of the app. - Additional Features Integration: I need you to integrate push notifications and a payment gateway into the app to enhance its capabilities - Voucher functionality: Users can purchase vouchers at half price. - Condition: To avail the voucher, the user must share the app link with 10 other users. - Success criteria: If the user successfully shares the link with 10 users, they can redeem the voucher at half price. - Failure criteria: If the user fails to share the link with 10 users, they will receive a 10% discount on the voucher instead. Some more questions - Can the voucher sharing process be automated or tracked within the app? Ideal Skills and Experience: - Proficient in mobile app development, particularly...

I'm looking for a mobile app developer to help me enhance my 6ammart app by adding the following features and integrating a payment gateway. Key Requirements: - **Vouchers Functionality**: I want to include a voucher system in the app to boost customer engagement and retention. The vouchers should be easily redeemable and trackable. - **Payment Gateway Integration**: My preferred payment gateway is Bank Alfalah. The developer will need to ensure smooth and secure transactions within the app. Ideal Skills & Experience: - Previous experience with mobile app development and customization. - Familiarity with loyalty programs and voucher systems. - Proficiency in integrating secure payment gateways, preferably Bank Alfalah. - Strong problem-solving abilit...

I'm looking for a skilled developer to enhance my 6ammart App with two key...with two key features: vouchers functionality and integration with Bank Alfalah's payment gateway. Key Requirements: - I'd like to include a system where users can redeem vouchers within the app. This functionality should be seamless, reliable and user-friendly. - Integration with Bank Alfalah's payment gateway is essential. Users should be able to make secure transactions using this payment method. Ideal Skills and Experience: - Proficient in app development, particularly on Android and iOS platforms. - Experience in integrating payment gateways into mobile apps. - Strong understanding of voucher systems and their implementation in apps. - Previous work with simil...

...develop a religious website that will be both in Marathi and English languages. The site will primarily serve the purpose of promoting events. I have a few specific features in mind for this site. Customer can book Pooja and other activities online with Payment Gateway. The content on the website will be managed by the admin only. I will be responsible for posting and updating the content. Ideal skills and experience for this project would include: - Proficiency in web development with experience in creating multi-language websites. - A good eye for design to ensure a visually appealing website. - Experience in implementing unique features such as event calendars and streaming services. - Prior experience in religious or community websites would be...

I'm in need of a payment gateway integration for my online business in India. Our backend is developed in PhP. Key Requirements: - **Gateway Preferences**: I'm currently looking into Razorpay or any other option that is both reliable and cost-effective. - **Transaction Type**: I'm primarily focused on setting up the system for one-time payments. Ideal Skills: - **Experience with Indian Payment Gateways**: Understanding of the Indian e-commerce ecosystem and familiarity with the payment gateway landscape in the region is essential. - **Payment Gateway Integration Experience**: Proven experience in integrating payment gateways, especially for one-time transactions. - **Cost-Effective Solutions**: Ability to provide and advise on cost-effective...

I'm looking for an experienced AI app developer who can create an app akin to Fulltrack Ai. Please take a minute and look at this before bidding. Let’s not waste each other’s time if you cannot build something similar to the above link.

...secure payment gateway to enable seamless transactions. Ideal candidate would have: - Proven experience in Android app development - Prior experience in developing e-commerce or service based apps - Familiarity with integrating payment gateways into mobile applications - Strong communication skills to ensure a smooth collaboration and understanding of requirements. I have a DJ and catering services business, that I do offline I want to do it online, want a digital presence so for that I will be needing an application This application will be a single platform for all the location like if you select any particular location like Mumbai so it should show all the DJ and catering vendors in that area So I need both from customer perspective as well as for vendor And we...

I'm looking for a skilled React developer who can assist in changing a Stripe integration to specifically for the payment form. - The integration should support recurring payments. - The payment form needs to collect the user's Name, Email, and Phone number. Ideal candidate: - Proficient in React and has experience with payment gateway integrations. - Familiarity with is a plus.

I'm looking for a skilled developer to create a website form for events. This form will be used for registrations and payments. Key requirements: - Integration of a form into the website - Capturing of standard user details; Name, Email, Phone number and Address - Additional fields for the event specifics, such as; Event date, Event type, Number of attendees The system needs to be secure, user-friendly and capable of integrating with a payment gateway. Skills and experiences required: - Strong understanding of web development - Experience with form integration - Knowledge of payment gateway integration - Familiarity with user security and data protection online

...the Tap payment gateway into my mobile application. The integration should be smooth and seamless, using the provided SDK and API keys. The primary goal is to ensure that the payment gateway functions properly and securely, without any errors, and provides a flawless user experience. Requirements: Proven experience in integrating payment gateways, preferably with Tap or similar services. Proficiency in the programming languages and frameworks used in my application (please specify if it's for Android, iOS, or a cross-platform framework). Strong understanding of API integration and handling secure data transactions. Ability to implement the payment gateway according to the documentation provided by Tap. Ensure the application functions correctly ...

Education Website with Live Class Feature The project requires comprehensive full-stack development skills, with the aim to create a robust and functional website targeting students. The layout should be intuitive, offering a seamless learning experience. Key Features: - A fully functional and interactive landing page that includes contact forms and social media integration for enhanced communication. - A secure payment gateway offering an effortless checkout process for users. - Implementation of video and study material storage facilities. - Live classes integration providing real-time learning experiences. Study Material Details: - Incorporation of text files, video lectures, and interactive quizzes for a well-rounded learning experience. The project offers a stri...

I'm in need of an experienced PHP MySQL developer to handle data management and manipulation, database design and optimization, as...developer to handle data management and manipulation, database design and optimization, as well as web application development for my project. The goal is to create a robust e-commerce website with the following features: - Product listing and details - Payment gateway integration Ideal candidates should have a rich background in PHP MySQL, web application development, particularly in e-commerce platforms, and database design and optimization. Your skills in crafting systems that are user-friendly, secure, and streamlined will be essential. Emphasizing on data management and security is also paramount in this project. Let's connect i...

Looking for a professional who can integrate a donation page into a website using CCAvenue as payment gateway.. Tasks Use our donation page with 6 different donation options and amounts and make the checkout via CCAvenue work. Design/create form to collect donor details (name, email, address, PAN etc) based on a sample form that will be provided. Backend Development (PHP): Integrate CCAvenue API using their PHP libraries. Develop functionality to capture donation amount and donor details. Send transaction data (amount, details) securely to CCAvenue for payment processing. Create a database to store donor information and transaction records. Payment Processing: Handle CCAvenue response (success/failure) after payment authorization. CCAvenue account to use for this project...

...looking for a front and back end for an online casino platform that has knowledge of the APIs necessary for the project, to do the layout and design of the page, with admin panels. These administrators will provide the credits used in the casino and the CEO (leaders only) will be able to create these credits. Without a payment system, since the payment system would go outside the page. Would prefer Spanish speakers, but English is fine as long as you have the required experience. Would like to find someone who has experience integrating MercadoPago payment gateway....

I'm seeking an experienced WordPress and WooCommerce professional who can help me with my project. Currently, I cannot move forward from the shipping options, after selecting one option, and placing the order I get a message: "Sorry, this order requires a shipping option." When the shipping option was already selected. Another issue is related to the language, it should be in Spanish, but wocoomerce is showing in English instead If the developer can fix this, there are a few small changes required to the implementation. You can check this on Key requirements: - Expertise in WordPress and WooCommerce: The ideal candidate should have a strong background in dealing with these platforms and resolving related issues. - Theme compatibility resolution: The theme I&#...

We are seeking an experienced website designer to revamp our boat rental service site, FLOATO.ae. The new design should be modern, user-friendly, and tailored to attract tourists interested in exploring local waterscapes. We aim to attract tourists primarily, so the website must cater to a tourism sector audience. The main objective is to allow seamless booking of our boats online. Key Features: - User-friendly interface for easy booking ( for phones, tablets, computers ) - Attractive and engaging design to appeal to tourists - Attached the Brand Guidelines - The current website is ( ) so want to redesign with new idea. - Current website: , which is based on a PHP platform. - File delivery HTML based on Bootsrap template. Ideal skills for this project include: -

Android Developer - SMS Processing and Remote Management App We are look...and a cover letter highlighting your relevant experience. Additional Notes: The admin panel should allow for single-click device blocking. The target keywords for SMS processing should be configurable within the admin panel. We are excited to hear from talented developers who are passionate about building secure and user-friendly mobile applications! Full details will be shared upon discussion. Please write sms in your cover letter so that we know you have read our full requirments. For reference you can visit this codecanyon project . although it is not as same as codecanyon. Our project is much simpler. Happy bidding.

We are seeking a skilled AI developer to create a custom AI script capable of generating answers based on specific datasets for multiple products. This AI model will provide accurate responses using only the data provided for each product. If the model cannot find a matching answer, it should prompt the user to contact us for further assistance.

We are seeking a skilled AI developer to create a custom AI script capable of generating answers based on specific datasets for multiple products. This AI model will provide accurate responses using only the data provided for each product. If the model cannot find a matching answer, it should prompt the user to contact us for further assistance.

I am looking for an experienced freelancer to ...following features: - User-friendly design and navigation - Responsive design for mobile and desktop - E-commerce functionality with a secure payment gateway - Product catalog with high-quality images and detailed descriptions - User account management - SEO optimization - Integration with social media platforms - Analytics and reporting tools Please provide your portfolio, estimated timeline, and a detailed quote for the project. I am looking for someone who can deliver high-quality work and has a proven track record in developing e-commerce websites. Examples like : It should be not to big just simple website :) Thank you, and I look forward to hearing from you.

...help create an engaging Shopify website. I need the website to include a product catalog, a shopping cart, and an integrated payment gateway. I do not have a specific design in mind, and I welcome your creative suggestions. My preference, however, lies towards a minimalistic design with easy navigation. The ideal freelancer for this job would have: - Experience in designing Shopify websites. - A knack for minimalistic and intuitive design. - Accomplished skills in product catalog setup, shopping cart implementation, and payment gateway integration. - A creative mindset and the ability to incorporate my suggestions and ideas into the design. Your proposal will be more appealing to me if it includes links to previous Shopify websites you've designed, particula...

I am l...module can add the new shop. 2. All communications and transactions with payment processors must appear as if they are conducted by Shop A, regardless of whether Shop A or Shop B/C/D is placing the order. 3. Shop B/C/D cannot use an URL (landing page) of Shop A. Find a solution. 4. The Backoffice function on order page showing from what multi shop the order was placed must work. TASK 3 Code a module compatible with multi shop and newest Prestashop 8+.(Product name) 1. Code a module able to handle a secondary product name hook. 2. The secondary product name hook needs to be able to overwrite standard product name hook on invoice, packing list, shipping label and communication with payment processor. 3. Front office (customer view) is always using standard p...

Required a dot net developer. Speacialized in Microservices acrhitecture based solution. Dotnet Core, C#, SQL, Data transformation, API gateway, Auth based security.

I'm looking for an experienced web developer to create a comprehensive IELTS Teaching Management System in PHP. The system will be utilized by students, teachers, and administrators. Key Features: - Student Management: The system should provide tools for student registration, tracking student progress, and managing student profiles. - Lesson Scheduling: Users should be able to schedule lessons, view lesson details, and manage their availability. - Progress Tracking: The system must include features for tracking student progress, including test scores, attendance, and performance analysis. - Payment Gateway: Integration with a secure payment gateway to facilitate online transactions for course fees. Ideal Skills: - Strong PHP programming skills and experti...

I need to automate the process of sending UPI payment links to my clients and recording the payments they make. Key Requirements: - Integrate UPI as a payment method for my business - Develop a system that au...UPI as a payment method for my business - Develop a system that automatically sends the payment links to customers - Record the customer details and the payment information each time a payment is made The ideal freelancer for this project will have: - Proficiency in UPI and payment gateway integrations - Experience in automating payment processes - Familiarity with WhatsApp API for sending messages - Knowledge of data recording and management systems - Previous experience in developing similar systems would be a plus Please indicate your relevant experience when bi...

...can create a clean and professional website that is also fully responsive and mobile-friendly. Ideal Skills & Experience: - Proficient in web development - Experienced in creating professional websites - Skilled in creating responsive and mobile-friendly designs Workflow: Customer fills out the booking form on our website with their details and preferences. Customer proceeds to the payment gateway (Razor pay) to complete the booking transaction. Upon successful payment, the booking details are stored in our database, and a unique booking ID is generated. Admin reviews new bookings via the admin dashboard and assigns cars and drivers based on availability. Customers receive confirmation of their booking along with trip details. Trips proceed as scheduled, with drivers provi...

I a...functionalities to make informed decisions and gain insights from user interactions and other data sources. You will also be responsible for: - Payment Gateway Integration: Integrate payment gateways to facilitate transactions within the platform. - Social Media Integration: Implement connections with social media platforms to enable user sharing, login, or other interactions. - Maps and Location Services Integration: Incorporate maps and location services in the application where needed. Ideal candidates should be proficient in Python and have experience with back-end development and integration. Familiarity with payment gateways, various social media APIs, and location-based services will be a huge plus. An understanding of security protocols for user ...

I am looking for a skilled PHP developer with experience in PHP frameworks, MySQL database, and E-commerce development to build a website. The developer should also have experience with Wordpress and int...and user-friendly online stores. - Proficiency in MySQL database is required. - The website will require integrating payment gateways, social media, and email marketing platforms. Hence, the developer should have experience in these areas. Ideal skills and experience: - PHP frameworks (Laravel, Symfony, CodeIgniter) - Wordpress - E-commerce site development - MySQL database management - Payment gateway integration - Social media integration - Email marketing integration If you have the expertise and skills required to execute this project effectively, please don't hesitate ...

...project entails: - **Core Features**: Implement a User Management System, API Integration and Payment Gateway Integration. Given the sensitivity of the data involved, it's crucial that these features are robust, secure and user-friendly. Build a cross-functional SMM panel that generates and sells traffic for all social media platforms. - **Security**: Incorporate Two-Factor Authentication and an IP Whitelisting system. Additionally, the script should have an extensive Activity Log Monitoring mechanism. - **Performance**: Develop a script that prioritizes speed and responsiveness. This includes a Fast Loading Service, Improved Caching System and a theme page builder. The theme page builder will be particularly important to allow me to customize the design according t...

I'm seeking a talented web developer to build an engaging e-commerce website for me. The website should be built on WordPress, or on framework like react aligning with the following specifications: - Includes standard e-commerce functionalities, such as a shopping cart, customer reviews, and payment gateway. - Integrates a unique 'grow a plant' game feature for users to interact with. The ideal freelance candidate for this project should have significant experience in e-commerce development, particularly on WordPress. The freelancer should also have a creative flair for integrating engaging features into a website. Previous experiences with gaming features will be an added advantage.

...mobile-friendly. The interface should be intuitive and user-friendly, making it easy for users to navigate and interact with the application. - **Integration and Third-Party Services** I'd like to incorporate the following integrations: - Social media integration: The ability for users to share content and interact with the application through social media platforms. - Payment gateway integration: A reliable and secure payment gateway to facilitate transactions. - Email marketing services integration: Integration with email marketing services to streamline communication with users. Your expertise with Core Java, Java 8 features, J2EE, JDBC, servlets, MySQL, JSPs, HTML, Spring MVC, Spring Boot, ORM, MVC Architecture, and API Development will ...

...comprehensive e-commerce website for my fast-moving consumer goods (FMCG) business. Key Requirements: - Product Management: The website should be able to support a catalog of 51-100 products. It should allow for easy addition, modification, and removal of products. - Shopping Cart: A seamless shopping cart feature is essential for a smooth customer experience. It should be user-friendly and support multiple purchases. - Payment Gateway: Integration of a secure and reliable payment gateway is a must. The gateway should support major credit cards and other common payment methods. Please note that the project is for the website setup only. The design aspect will be handled separately. Experience in e-commerce website development, specifically on...

I'm in need of an experienced PHP developer, well-versed in Core PHP and Wordpress Development. The ideal candidate must be able to work on various projects with the following requirements: - User Authentication and Authorization: The developer will need to create secure login and registration systems for our websites. - Database Integration and Management: Proficiency in MySQL is a must. The developer will be responsible for managing and integrating databases effectively into our sites. - Payment Gateway Integration: The developer will have to implement payment gateways, ensuring a smooth and secure payment process for our users. Ideal Skills: - Proficiency in Core PHP and Wordpress Development - Strong understanding and experience with MySQL - Previous experie...

I'm looking for an experienced app developer to create a comprehensive e-commerce application for both iOS and Android platforms. Key Features: - Implement a functional and secure shopping cart system - Develop user profiles with seamless registration and profile management - Integration of a reliable payment gateway for smooth transactions Ideal Skills and Experience: - Proficient in cross-platform app development - Proven experience in e-commerce app creation - Knowledge of implementing and securing payment gateways - UI/UX design skills to ensure user-friendly interface

I'm seeking a skilled developer to integrate the Razerpay payment gateway into my custom-built website. The project will include the following requirements: - Integration of Razerpay payment gateway: The developer should be experienced in integrating payment gateways and should have specific experience integrating Razerpay. - Multi-currency support: The payment gateway should be able to handle transactions in multiple currencies. This may require additional configurations on both the gateway and the website itself. Ideal Skills: - Proficient in web development - Experience with custom-built websites - Experience with Razerpay integration - Knowledge of multi-currency payment processing

...there is nothing to worry about your privacy. Testing will be done on Windows desktop and will mainly involve QA checks and regression Testing of certain software. All testing done are on confidential pre-release test builds so discretion of what you test IS IMPORTANT. Please acknowledge this in your proposal. An NDA will be signed in this regard. I require someone with excellent IT skills and a very good command and understanding of written English with the ability to fluently understand oral and written instructions in English. Also report writing is a major requirement. Typically, I would require someone with at least 1-year experience in the software testing field. Knowledge or experience in finance and business IT would be a plus. Knowledge of Google Sheets a...

Integrate payment gateway. Payment gateway dont have suitable sdk for flutter. Flutter App.

I'm looking for a skilled PHP developer with experience in Co... JavaScript, HTML5, and CSS3 - Knowledge of MySQL and other relational databases - Familiarity with RESTful APIs and Web Services - Ability to work with version control systems like Git The primary goal of the project is to create a robust, scalable, and user-friendly e-commerce platform. The platform should be able to handle a large number of products, facilitate smooth transactions, provide a secure payment gateway, and have a user-friendly interface. A key part of the role will be to ensure the system is built with scalability and maintainability in mind, to support future growth and modifications. If you have experience in CodeIgniter and e-commerce development, please reach out with your portf...

I need a proficient PHP developer to address an integration issue I'm experiencing with the Ccavenue payment gateway on my website. Key Tasks: - Resolve the integration issue occurring at a specific stage of the payment process. - Implement the necessary changes to ensure the payment gateway functions seamlessly. - Integrate a new control panel in the admin panel. Ideal Skills and Experience: - Strong command of PHP, particularly in relation to payment gateway integration. - Previous experience with Ccavenue payment gateway is highly preferred. - Proficiency in admin panel development. - Ability to troubleshoot and identify issues efficiently.

W...purposes. - The website will primarily be used for uploading question papers in PDF format and providing a student login dashboard. - I prefer the website to be developed on WordPress. - The key functionalities I require are user registration and login. - Additionally, I would like the ability to upload and download content, as well as an interactive dashboard. _Conducting online quiz with ranking and candidate wise SWOT analysis. Ideal Skills and Experience: - Proficiency in WordPress development - Experience in creating user registration and login systems - Ability to implement content upload and download features - Knowledge of creating interactive dashboards - Familiarity with education-related websites and requirements Payment gateway and soc...

I am seeking a WordPress developer with experience in e-commerce website development. The project primarily involves customizing a theme for e-commerce functionality and developing plugins, particularly for product customization and payment gateway integration. Key Tasks: I need to build like Ideal Skills and Experience: - Proficiency in WordPress, including theme customization and plugin development - Experience in e-commerce web development - Knowledge of product customization and payment gateway integration - Strong problem-solving skills and ability to work independently If you have a solid understanding of WordPress and e-commerce, and you're able to work on the specified tasks, I would like to hear from you.

...Key Requirements: - The application should be a complete package, designed to be user-friendly and efficient, streamlining the grocery shopping and delivery process. - Integration with PayPal and a European payment gateway is necessary. - The inventory management system must be integrated with WooCommerce. Support and Deployment: - Your role will extend beyond development; you'll be required to provide detailed support to my in-house tech team for deployment and maintenance. - The final product should be fully functional and ready for use. Skills and Experience: - Proficiency in full-stack development, with experience in creating and deploying similar applications. - A strong understanding of e-commerce, inventory management, and payment ...

...the platform onto various social media channels. Qualifications: Proven experience as a PHP Laravel Developer, with a strong portfolio of completed projects. Proficiency in PHP, Laravel, MySQL, HTML, CSS, JavaScript, and related technologies. Strong understanding and experience in user management systems, role and permission setups, and user profile management. Previous experience with payment gateway integration. Prior work with social media sharing feature implementations. Ability to dedicate full-time to the project is crucial. Familiarity with version control systems (e.g., Git). Strong problem-solving skills and attention to detail. Ability to work independently and as part of a team. Excellent communication and collaboration skills. Preferred Skills: Experience with front...

...Login: The platform will need a secure, user-friendly registration and login system to ensure that users can access their accounts easily, while keeping their information safe. - Product Listing and Search: The app and website should allow for the listing of different investment products and enable users to search for and view these products. - Payment Gateway Integration: Users must have access to a secure and reliable payment gateway, as they will be investing money through the app. Design: I prefer a colorful and vibrant design that is pleasant to the eye yet still professional and trustworthy. Ideal Skills: - Proficiency in Android Development - Experience in Front-end and Back-end Web Development - Understanding of User Authentication and Data Security - Pr...

...looking for a skilled web developer who can bring my vision for a site to life. The site I have in mind is an information sharing/educational content platform. It will serve as a hub where users can access and contribute to various types of educational content. Key Functionalities: - **User Registration and Login**: The site should allow users to create accounts and log in securely. - **Payment Gateway Integration**: I want a seamless payment system for premium content or memberships. - **Content Management System (CMS)**: The platform should support easy content uploads and management. The ideal candidate for this project would have experience in: - Developing similar informational or educational websites - Integrating payment gateways - Implementing secure user authenticati...

I'm looking for a highly experienced e-commerce website developer, capable of creating an interactive and user-friendly website for marketing my physical products. Key Requirements: - Able to develop a site accommodating more than 50 product categories. - Payment gateway integration is essential in facilitating transactions. Desirable Experience and Skills: - Extensive experience in e-commerce website development, specifically those selling physical products. - Proficiency in integrating payment gateway systems. - Proven experience in organizing a vast collection of items facilitating easy navigation.

I need a top-notch designer to create a high-converting E...website for my business. Key Requirements: - E-commerce Expertise: Experience designing and building E-commerce websites is essential. You should have a deep understanding of what drives conversions in an online store. - Payment Gateway: I want to integrate Razorpay as my payment gateway. Experience with this, or a similar payment solution, is a plus. - User Experience: The website should be intuitive, easy to navigate, and optimized for all devices. - SEO-Friendly: A good understanding of SEO best practices and how they relate to E-commerce is preferred. Your role will be to create a visually appealing and functional E-commerce site that not only showcases my products effectively but also leads to a...

I have a Python notebook containing well-structured code that effectively translates a sample of a large dataset from English to Arabic. However, the current code cannot handle the entire dataset due to its size. using : model_name = 'Helsinki-NLP/opus-mt-en-ar' Tasks: - Modify the existing Python code in the provided notebook to translate the entire dataset from English to Arabic. - Ensure the translated data is saved in two formats: Comma-Separated Values (CSV), and Apache Parquet (.parquet) - Provide the CSV and parquet files after saving (most run and give results)

I'm in need of a professional website designer to help create an e-commerce website for my business. The website should include key features such as: - Product pages: individual pages for each of my products, showcasing pictures, descriptions and pricing. - Shopping cart: an easy-to-use shopping cart for customers to make purch...for customers to make purchases directly from the website. - Customer reviews: a feature for customers to leave and view reviews for each product. In terms of payment methods, I'd like the website to support Credit Card, PayPal, and UPI transactions. Ideal skills and experience for this job would include a demonstrated proficiency in e-commerce website development, understanding of payment gateway integration, and experience in designing user-...