Recurring auto payment paypal php jobs

I'm looking for a PHP developer who has experience with Pincone and database connectivity & Search Via Query. I want to make just small demo to brief how i can connect and search via Pincone to PHP If you did this job earlier then only bid | Regard

I am in need of a distinct, custom design for 19-inch car rims made of aluminum. I am looking for something unique and original, not just the classic, modern, or sporty design models. This calls for excellent creativity and understanding of aluminum material properties. A solid background in aluminum metalwork and car rim design is a must. Applicants should be prepared to share e...This calls for excellent creativity and understanding of aluminum material properties. A solid background in aluminum metalwork and car rim design is a must. Applicants should be prepared to share examples of their prior work or create a mockup to demonstrate understanding. High-quality, detailed drawings are expected. Stand out by showcasing your creativity and attention to detail in the realm of auto pa...

I'm in need of a PHP specialist with extensive experience in all versions of Zen Cart to customize payment page to include additional payment methods besides paypal. This is for EXISTING ZEN CART WEBSITE USING VERSION and possible update zen cart on EXISTING website. 1.PHP Expertise: high level of programming expertise PHP skills are essential, including how to change php version with patches or HTacces change Cart Experience: Familiarity with Zen Cart is a must. An understanding of its architecture and functionality is crucial to ensure a successful integration and customization. Site is running very old version of zen cart customization Integrated the stripe payment page that has options for now, pay later: Stripe suppo...

I need a skilled freelancer to create a comprehensive lead generation and auto-boarding system using System.io. Key Responsibilities: - Developed using for B2B lead generation, with the primary goal of increasing lead generation - Implement effective email marketing strategies within the system - Incorporate conversion optimization tactics to maximize lead conversion Ideal Candidate: - Intermediate level expertise in using - Extensive experience in lead generation, ideally within a B2B context - Proven track record in successful email marketing campaigns - Strong understanding of conversion rate optimization The project will require a highly organized individual with a keen eye for detail and the ability to implement a strategic and data-driven approach to lead generation

I am looking for an experienced and reliable PHP developer to integrate a new payment provider (CCBill) into our existing ecosystem. This system includes various APIs built with PHP 7.4, Symfony and MySQL. Requirements: - Extensive experience with PHP, specifically PHP 7.4 - Familiarity with integrating payment providers - Experience working with Symfony framework - Experience with MySQL databases - Familiarity with complex API ecosystems - Reliability and professionalism Project Details: - Scope: Integrate a new payment provider into our existing system, ensuring seamless functionality - Timeline: Expected duration and deadline can be discussed - Communication: Regular updates via preferred communication channels (email, zoom or...

I'm looking for a skilled developer who can help me resolve a recurring issue with my React Native application. Although I don't have specifics on when the app crashes or the specific actions that trigger the issue, the app is currently unstable and crashes periodically. Your main task will be to identify, locate, and resolve the source of this instability. This could involve a range of potential issues from memory leaks, state management problems, race conditions, to others. The ideal candidate should have: - extensive experience in debugging React Native applications, - be familiar with the common culprits of app crashes and how to mitigate them, - be able to work independently based on the problem description provided. If you have successfully resolved similar ...

I am s...e-commerce site development. Your prior experience with creating such platforms, particularly with a product range exceeding 100 items, will be highly beneficial. - Payment Gateway Integration: The website should allow customers to pay via credit card and PayPal. Your proficiency in integrating these payment methods securely and seamlessly is essential. - Customizable Design: While I have a vision for the website's aesthetics, I'm open to suggestions. Your ability to design a visually appealing, user-friendly interface will be a significant advantage. In your proposal, kindly highlight your previous e-commerce projects, payment gateway integration experience, and share any design work you've done. Additionally, please provide an estimate...

...website should essentially operate as a single product online store, optimized for sales of the software. - **Digital Product Delivery**: After a successful purchase, I'd like the software to be delivered via email with a secure download link. - **Payment Integration**: The website should have seamless integration with both Credit Card and PayPal payment gateways. Skills: - Proficiency in e-commerce website development - Experience in digital product sales platforms - Payment gateway integration expertise, especially in Credit Card and PayPal - Strong understanding of security considerations for digital product delivery - Ability to design a user-friendly interface for a smooth customer experience. Feel free to reach out if you have furthe...

I am looking for a software designer who can help me build a payment processing company similar to VISA INC, while ensuring that the company complies with all relevant laws and regulations in North America. Key Requirements: - I want the company to focus on payment processing. - The software must include a mobile-friendly design to cater to the increasing mobile transaction trend. - The payment gateway should be integrated into the system to provide a seamless, secure transaction experience. - An inventory management system is also crucial for our operations. Ideal Skills and Experience: - Proven experience in designing and developing payment processing systems. - In-depth knowledge and understanding of North American regulations and compliance requirements. -...

...refer to as a member, or for a price depending on level of training, be may he’d with a trainer for a course. Must provide to access and charge a service fee for both the trainer providing the service and the trainer if not in the free area A section to upload short videos or to post a zoom link for meetings. Membership for anyone wanting access to the website will be five dollars per month, recurring automatically and 3% service fee for any matches made based on the price that is quoted and accepted by the person hiring for the skilled worker. Ideal Skills and Experience: - Proficiency in web development and design - Experience in creating and integrating contact forms, image galleries, and training areas - Familiarity with matchmaking algorithms - Previous work in crea...

I'm looking for a proficient video editor who can cut three video tracks of an interview from into a 20-40 minute video podcast. The major tasks include: - Add existing opening and closing graphic - Edit between 2-shot and two single recordings of interviewer and interviewee - Add intro/ outro music - Removing unwelcome background noise - Adjusting the ove...who can cut three video tracks of an interview from into a 20-40 minute video podcast. The major tasks include: - Add existing opening and closing graphic - Edit between 2-shot and two single recordings of interviewer and interviewee - Add intro/ outro music - Removing unwelcome background noise - Adjusting the overall mix to yield a clearer sound If compatible, this could be a recurring job 1-2x per month.

...Lawyers 8 - Pool Accident Lawyers 9 - Personal Injury Lawyers 10 - Motor Vehicle Accident Lawyers 11 - Personal Injury Lawyer Near Me 12 - Lawyer For Car Accident 13 - Personal Accident Lawyer 14 - Car Lawyer Accident 15 - Attorney Personal Injury Near Me 16 - Accident Lawyers Car 17 - Personal Injury Lawyer Attorney 18 - Car Accident Attorney Lawyer 19 - Accident Lawyer Near Me 20 - Lawyer For Auto Accident This is for the website I must be 100% happy with the result. I require daily reports on what you are doing. I want daily backlink reports. I want daily position ranking reports. In addition, I want to see more backlinks that are high DA and PA and are more niche related. The niche has to do with accident lawyers and accident attorneys. I require top notch communication

...integrating various payment options. It is preferable to build the store using existing templates for efficiency and consistency. Project Requirements: Platform: Wix or Squarespace (please specify your expertise). Design: Customizable, responsive design tailored to our brand and product offerings, preferably using existing templates. Features: - Product catalog with categories and filters. - Stock availability & releases. - Secure user registration and login. - Shopping cart and checkout process. - Integration of payment gateways (e.g., Tabby, bank APIs). - SSL certification for secure transactions. - Shipping address collection. - Client database for storing customer information. Payment Integration: - Must integrate Tabby for installment payments. - Shoul...

I'm looking to hire a skilled web de...front-end development - At least an intermediate level of experience in UI/UX design - Able to work both independently and as part of a team - Detail-oriented with a strong eye for design aesthetics - Comfortable with both full-time and part-time work All who sign up and have previous work on display will be given a chance to work with a client. If a client wants to have the service as a monthly recurring subscription to my agency then the same freelancer/contractor will be working with them until/if the client feels they no longer need the service. This is a great opportunity for someone who wants to grow their web design career and work in a dynamic, creative environment. If you meet the criteria and are ready to contribute to our team...

Hello, I will need a basic php app, for a simple petrol stations management. with 2 roles and a rest api that will support the following calls: 1. GET: Get service station data and prices of selected fuel. GET: Number of service stations (integer), maximum, minimum and average price per litre (with 3 decimal places). 3. GET: Get a price list of a service station. 4. POST: User login (the database already has users). 5. 6. GET: Receive orders of a service station from the service station owner 7. PUT: Price change to fuel from petrol station owner 8. PUT: Execution of an order by the retailer 9. DELETE: Deletion of an order by a petrol station owner or by a simple user (if it has not been executed). Analytical details docx on chat. Budget: $80 USD Deadline: 31/5

Need someone to create Php script that can be used to create domain and subdomain using cpanel api

...website should have a user-friendly layout that appeals to customers - It should incorporate a simple checkout system that supports multiple payment methods - I plan to initially list between 1-10 products, so the site should accommodate this range - The payment gateway should be capable of handling diverse payment methods including Credit Card, PayPal, Bank Transfer, and UPI - The design should be minimalist but engaging, prioritizing product display and secure payment options Ideal Experience: - Proficient in e-commerce website development - Strong understanding of user interface and user experience design - Familiarity with integrating multiple payment gateways - Capable of creating engaging and user-friendly layouts - Past work in similar ...

...set up a payment portal on the Radix network that caters to individual users. This portal is specifically meant to facilitate instant payments through cryptocurrency. Key Requirements: - **Radix Network Integration**: You should be familiar with the Radix network and have experience in setting up payment systems on it. - **Cryptocurrency Integration**: The payment gateway should support any cryptocurrencies on the Radix network. - **User-Friendly Design**: The portal should be intuitive and easy to navigate for individual users. - **Instant Payment Processing**: The primary goal for this portal is to facilitate quick payments, so a fast and reliable payment processing system is essential. Ideal Skills: - Experience with Radix network - Proficiency in...

We're seeking a talented Python/Django developer and a skilled frontend developer to collaborate on an exciting new web payment application project. Python Developer Tasks: - Django Development: The project will involve extensive Django work, including back-end architecture, database setup, and custom feature development. - Database Management: You'll be responsible for creating efficient database structures and maintaining data integrity. - API Integration: The application will interface with external systems through APIs. Your role will involve seamless integration. Frontend Developer Tasks: - JavaScript Development: Your JavaScript expertise will be crucial in building interactive and responsive user interfaces. - React Development: You will be working with React to ...

...in need of a professional Magento 2 developer to finalize a payment module for my e-commerce store. The module is intended to provide the following key functionalities: - Payment processing: The module should be able to effectively process payments for products purchased on the site. - Seamless checkout experience: I'm looking to ensure a smooth and hassle-free checkout experience for my customers. - Support for multiple payment gateways: The module should particularly include TakePayments, but also be adaptable to integrate with other gateways in the future. The ideal candidate for this project should have: - Proven experience and expertise in Magento 2 development - Previous experience with implementing and customizing payment modules - A strong tra...

I'm seeking a talented web developer to build an E-commerce platform dedicated to physical products. As the ideal candidate, your skills and expertise should cover: - Extensive e-commerce website development experience - Familiarity with creating websites oriented towards selling physical products - Proficiency in integrating Bank Transfers and PayPal payment methods onto websites Your prime responsibility will be crafting a reliable, user-friendly e-commerce website that can facilitate seamless transactions. Knowing how to make a site that's easy to navigate and appealing to potential customers is critical to your role. Your dedication and attention to detail will directly influence the success of our virtual store. Let's create an e-commerce site that'...

I am in need of a skilled PHP developer who can help me with implementing some design adjustments on my website. The job will involve: - Making layout adjustments - Updating the fonts - Adding new sections, specifically testimonials Your tasks will include modifying the layout of the website to accommodate the new sections and updating the fonts to align with the design changes. You will also be responsible for ensuring that the users' testimonials are seamlessly integrated into the design. Ideal Candidate: - Proficient in PHP - Strong understanding of front-end design - Experience in layout adjustments and font updates - Ability to add new website sections - Attention to detail, to implement the design changes accurately. Please note that you will be provided wit...

...scale as my business grows. Key Features: - E-commerce Focus: The primary goal of this project is to create a fully functional e-commerce platform. - Payment Integration: I'm looking to integrate credit card and cryptocurrency payment options. These should be secure, reliable, and user-friendly. - Scalability: The website should be designed to accommodate a growing product base. Although the exact number of products isn't defined, the website should be built with the potential for a large inventory. Ideal Skills and Experience: - Proven track record in building e-commerce websites, preferably with scalable features. - Strong experience in payment gateway integration, particularly with credit cards and cryptocurrencies. - Understanding of user experience...

I have a backend code for a pre-existing fully function website and mobile app. The backend code is currently all written in php. I need someone to convert this existing php code into fully functional python code which I can deploy.

We have built a customized website in core php and need another experienced developer to join the team to fix some bugs, We are looking for a very experienced php developer for our project, you must have at least 12-15 years of experience with a good reference . Must have experience in multi-user programming, must know how to do quality coding, fix sql injections Conditions: You must be a independent freelancer. and share with some of your customized applications that u have worked on.

I want to Rank Keywords at the 1st Position of the Google Search and payment will be done after ranking the keywords at 1st position of the google search only otherwise no payment will be made. Weekly and monthly backlinks creation and work done report is mandatory. Keyword : Target URL 1) bharatiya nyaya sanhita 2023 pdf: 2) bharatiya nyaya sanhita pdf: 3) section 69 bns: 4) bns section 69: 5) bns 352:

I need a PHP script to update an existing PDF file with data from a form. - The purpose is to update information in the PDF file, not generate new ones. - The edited PDF will be displayed once, not saved for future reference. - The data that I'll be entering into the form is a bit more complex than just text. It includes text, images, tables, etc. The ideal freelancer for this project should have: - Strong understanding of PHP. - Experience with PDF manipulation in PHP. - Ability to work with various data types in PDFs. - Attention to detail to ensure the PDF retains its original style, font, spacing, etc.

...who can help me create a logo for my company, Luminous Properties. As a land and property developer, it's crucial that the final design conveys trust and reliability. we care about environment and natural beauty, so we also like to have something that shows this on our logo. We want to have an icon that represent us and our name on our logo. Please submit your unique design, we will reject any auto generated logo or copy of other's concept. The ideal candidate should have: - A solid understanding of logo design, particularly in the context of property development. - Proven experience in creating logos that communicate trust and reliability. - A keen eye for aesthetics and detail. - The ability to bring innovative and fresh ideas to the table. - Strong communication sk...

...necessary (php receiving the form optional, see below). „Nice Admin“-Template must be used: Project Requirements: - Convert Microsoft Word Document (2 pages) to Web Form: Transform the content and layout of the Word document into a web-based form. - Responsive Design: Ensure the form is fully responsive and looks great on all devices (desktop, tablet, and mobile). - Form Fields: Create all necessary form fields as outlined in the Word document, including text fields, dropdowns, checkboxes, addable rows table, etc. - User-Friendly Interface: Design a clean, user-friendly interface. Skills Required: - Proficiency in HTML, CSS, JavaScript, and responsive web design - Experience with web form development and validation PHP Integration

I'm in need of a skilled PHP developer to create a custom admin dashboard. The primary goal of this project is to provide a user-friendly interface for my data, with the following features in mind: - **Data Visualization**: I want the dashboard to be able to display key data pertinent to my business. This may include sales data, user activity, and website traffic. - **User Management**: While not explicitly stated, I understand the importance of user management in an admin dashboard. Therefore, building a system that allows for user management is a crucial part of this project. - **Role-based Access Control**: I want the dashboard to have role-based access control. This means that users will have different levels of access based on their roles within the organization. Your re...

I'm in urgent need of a Magento 2 developer to address a critical issue with my website's payment gateway. Key Requirements: - The current payment gateway, Razorpay and Payu, is not functioning correctly. I need a professional who can quickly identify and resolve the root cause of this issue. - The selected candidate must have prior experience working with Magento 2 and integrating payment gateways. - Familiarity with Razorpay's API would be a huge plus, as I've already integrated it into the site. The ideal candidate will be someone who can work efficiently, has a thorough understanding of Magento 2, and can troubleshoot and resolve issues with payment gateways. Note : Payment will be release on successful task completion. and I...

I'm in need of an experienced PHP backend developer who can assist me with urgent server configuration and API integration tasks. Specifically, I would require the following: - Server Configuration: I need someone who is well-versed in server setup and configuration, ensuring a smooth and efficient back-end infrastructure. The ideal candidate should be able to ensure optimal performance and security. - API Integration: There is a need for the integration of an 'informative application' API. This task requires someone with prior experience in integrating custom APIs and a strong understanding of how to effectively connect APIs for seamless functionality. Ideal Skills and Experience: - Proficient in PHP for backend development. - Strong background in server co...

...nonfunctional PHP or HTML form based on a concept I have. The form should be beautifully designed and should be able to toggle between light and dark modes. I only need the design. This form does not require a database. - The form should be designed to be versatile and multiple types of utility forms - The form should include various fields, including but not limited to Name, Email, Phone number, Address, and Message. - The form should be equipped to handle and incorporate different types of utility forms such as Contact form, Feedback form, Registration form, and Survey form. I will provide you with a mockup of the form; you will be tasked with transforming this concept into a functional form. Most have side admin panel Ideal Skills and Experience: - Proficient in P...

We need an expert to help us set up a GitHub Codespace for our Prestashop Website. We've already created the appropriate Codespace account and repository. We also user Docker. We don't manage to run php 7.0 on the codespace server. There's probably something we're doing wrong (we're not github/codespace experts). We need you to finish the set up for us. Please apply to this job ONLY if you're very experienced with Github-Codespace-Dockers + php.

Hi Zubair Ali S., I noticed your profile and would like to offer you my project. We can discuss any details over chat.

I need an experienced Figma designer to update our current design for dev mode. Dev mode depends upon scaling and pixelations. you would need to: - Audit each page component wise to review improvements. - Clean up and organize layers in heirarchical order. - Adjust equal spacing. - Use Auto layouts for responsive components. - set up guide with palettes and typography and space rules. - Use figma precision tool for alignment. - aprovide margin, padding and css using figma built in tool as dev mode setup If you have experience with jinja2 it is a big plus as we want to transfer all components from figma to jinja2. The job must be completed this week and is expected to take a skilled figma expert with experience optimizing for dev mode about 20 hours to complete. There will be mor...

I'm looking to create a top-notch e-commerce website that can handle transactions across multiple payment gateways and cater to a global audience. This site should be well-integrated with multiple payment options including Credit card, PayPal, Stripe, UPI, Phone pay, Google pay, Paytm. The site should be developed with a global scale in mind, with the ability to sell to countries such as United States, United Kingdom, Australia, India, and beyond. Key Requirements: - E-commerce Website: You should have a strong background in developing e-commerce sites with extensive experience in integrating multiple payment gateways. - Global Audience: The site should be designed to handle transactions in multiple currencies and be adapted to different countries' ta...

...necessary (php receiving the form optional, see below). „Nice Admin“-Template must be used: Project Requirements: - Convert Microsoft Word Document (2 pages) to Web Form: Transform the content and layout of the Word document into a web-based form. - Responsive Design: Ensure the form is fully responsive and looks great on all devices (desktop, tablet, and mobile). - Form Fields: Create all necessary form fields as outlined in the Word document, including text fields, dropdowns, checkboxes, addable rows table, etc. - User-Friendly Interface: Design a clean, user-friendly interface. Skills Required: - Proficiency in HTML, CSS, JavaScript, and responsive web design - Experience with web form development and validation PHP Integration

I have an issue with overlapping content in my website's navigation bar and footer. I need a skilled developer to fix the problem. Key Requirements: - Fixing overlapping content ...I need a skilled developer to fix the problem. Key Requirements: - Fixing overlapping content in the navigation bar and footer - Ensuring the elements are well-aligned I'm aiming for a responsive design that works seamlessly across different devices - desktop, mobile, and tablet. The final output should be fully functional on Chrome and Safari. Ideal Skills and Experience: - Proficient in PHP, CSS, and HTML - Experience in responsive web design - Knowledge of cross-browser compatibility issues - Prior work with navigation and footer elements - Ability to troubleshoot and resolve desig...

Scope of Work: Survey Tracking Website Development with Payment and WhatsApp Integration 1. Website Development (Exclude Content) Overview: Develop a survey website that allows users to register, upload documents, make payments, and track the status of their submissions using a unique tracking number. Additionally, integrate a WhatsApp or chatbot for customer support. Frontend Development 1. User Interface Design: • Create a responsive and user-friendly design that works on all devices (desktops, tablets, mobile phones). 2. Components: • Homepage: • Engaging visuals and clear messaging to capture visitor attention. • User registration, login, and payment links. • Introduction to the service. • About Us Page: • Detailed information about the...

I need to migrate our current Microsoft...key aspects of the project: - Migrate from existing VoIP system to RingCentral including porting existing phone numbers - Ensure all the features we need are properly set up in RingCentral, specifically call forwarding and auto-attendant - Complete the migration with minimal downtime and disruption to our business operations - Provide training to 11-50 employees on how to use the new RingCentral system Ideal skills and experience: - Proven experience in VoIP system migration - In-depth knowledge of RingCentral system and its features, particularly call forwarding and auto-attendant - Strong project management skills to ensure a smooth transition with minimum downtime - Experience in providing training on new systems, especially to me...

Hello, I'm in need of a skilled UI developer with solid PHP experience to assist with a project. Strong UI Experience + PHP Experience - Have to fix few pages design & layout change for 1 page. Its 4 - 5 hrs work for experience , i will share FTP detail & task detail document in DM Max Budget 1000 INR Regard

I'm seeking someone with a built-in infotainment system who can test an application for retrieving speed and fuel level data via Android Auto. I'm interested in verifying whether the application accurately displays the car's speed and fuel level.

I'm looking for an experienced professional in Power Factory and Electronics. The project will involve a mix of tasks such as circuit design, power system analysis, PCB layout design, as well as potentially designing a circuit, simulating power systems, and developing control systems. Ideal Skills and Expertise: - Proficien...circuits, simulating power systems, and developing control systems. - Strong problem-solving ability The task involves working on a project where knowledge and expertise in Power Factory and Electronics is crucial. The right candidate should be able to provide support in a wide range of tasks and have a track record of delivering high-quality work. No teams or companies. Also, for all the auto bidders read the requirements before applying to avoid w...

I'm looking for a skilled PHP Laravel developer to work on a project basis. The ideal candidate should have expertise in the following areas: - Frontend Development - Backend Development - Database Management

I'm needing a skilled Wix developer to build a membership website for our association. This project encompasses numerous features: - Member Registration: Design an accessible registration process for new members. - Payment Processing: Implement a seamless and secure system for processing recurring membership subscriptions. - Member Login & Account Management: Enable members to login using their email and password in order to manage their own account details. Prior experience in executing similar projects and knowledge in payment gateways is preferred. The website should be user-friendly, guaranteeing our members a smooth and intuitive experience. Your expertise in building Wix websites will be instrumental to the successful completion of this project.

I want a skilled PHP developer with experience in form handling to create a script for me that will block a form's submit button until certain conditions are met. Key Requirements: - The button should only become active if the user types in any text. This means if the form is left blank or a field is left empty, the button should stay inactive. - After clicking the button, if the conditions are not met, I want an error message to be shown to the user. This is to ensure that they understand what is expected before the form is submitted. The form is working inside an wordpress website but was made with php

I'm in need of a skilled developer who can integrate Stripe payment into our current CRM system, which has an open API. The main function of the integration will be to track payments. Key Responsibilities: - Integrate Stripe payment system into our CRM - Ensure seamless payment tracking functionality - Testing the integration to ensure it's functioning correctly - Provide documentation on how to use the integration Ideal Skills and Experience: - Proficient in using Stripe APIs - Experienced in integrating payment systems into existing systems - Familiar with CRM systems and how they interact with external APIs - Strong problem-solving skills and attention to detail If you possess these skills and have prior experience in similar projects, I'd l...

...professional who can assist in enhancing my website's search engine rankings. The primary goal is to improve the visibility of my website online. This will ultimately drive more organic traffic to my site and improve its search engine rankings. **LINKS NEED TO BE CREATED ON GDRIVE and SITES THAT I SPECIFY My business specifically targets the following keywords: - Car wreckers - Car removals - Auto wreckers - Cash for cars - Truck Wreckers - Cash for Trucks - Truck Removals Your main task will be to create high-quality SEO backlinks that are directly relevant to my industry and the keywords mentioned above. These backlinks should be from reputable websites and should help drive traffic to my site. The ideal candidate for this project would be someone with a strong backg...

I'm in need of an experienced PHP developer to assist in enhancing my project with specific focus on design modifications and functionality enhancements. Key Tasks: - Design Modifications: The project requires a design overhaul to improve aesthetics and user experience. This includes updating the layout, color scheme, typography, and overall visual elements. Your ability to create appealing, modern designs that align with our brand is crucial. - Functionality Enhancements: There are certain functionalities within the project that need to be revisited and improved. Your role will involve identifying areas for enhancement, suggesting necessary changes, and implementing these updates effectively. You should be well-versed in PHP development and capable of optimizing exist...