Pos offline jobs

Key features must be: User Registration/Login Search Bar Product Listings Price Comparison Engine Filter and Sorting Options Product Details Wish List/Save for Later Price Alerts User Reviews and Ratings Secure Payment Integration User Profiles Notifications Barcode/QR Code Scanner Multi-platform Support Analytics Dashboard (for Admin) Customer Support Social Sharing Location-based Services Offline Access Customizable Alerts and Preferences Loyalty/Rewards Program Integration Accessibility Features Data Privacy and Security Feedback Mechanism Admin Panel Third-party Integrations

I'm seeking a highly skilled mobile app developer who can work on both iOS and Android platforms. Your primary tasks will involve: - Designing and implementing user interface improvements. - Executing bug fixes. - Performance optimization. While not all improvements have been specified, I'm...particularly in the application improvement sector. - A comprehensive portfolio of past work clearly demonstrating abilities and efficacy. - Comprehensive project proposals detailing how you intend to meet our projects objectives. Although no new features have been currently specified, knowledge and experience in iOS and Android functionalities such as push notifications, social media integration, and offline mode, will be very advantageous for this project. I look forward to se...

...can check your balance in the app. Payment: Payment will be based on the number of days scans were performed. Payment will be made within 5 days after the end of the month. The money will be sended through PayPal or Wire Transfer iva Western Union Application Objective: We are a technology company, and this project aims to validate the health of domains and IPs by checking if they are online/offline from the Internet Service Provider. For India Freelancers (ONLY): Check if your ASN (Autonomous System Number) is in the provided options. Verification method: Visit and validate the asnum displayed on the screen. ASNs Available for Validation in India: AS45609 - Bharti Airtel Ltd. AS for GPRS Service AS24560 - Bharti Airtel Ltd., Telemedia Services AS4755 - TATA

I need a skilled PHP developer to change a PHP script for Prestashop. Upgrade script from PHP version 7 to PHP version 8 Key Requirements: - The script should facilitate the import/export of sales and stock of products. This is crucial for the seamless operation of my e-commerce store. - Integration with Onlinefact, my POS software. Ideal Skills: - Proficiency in PHP - Extensive experience with Prestashop - Strong understanding of e-commerce processes and needs - Excellent problem-solving abilities and attention to detail Please only apply if you have the required skills and are confident in your ability to deliver quality work.

Hi Bettina, I tried to reach you via chat, but I see you are offline, so I am trying to reach you this way. Hoping you are doing well. We are about the start the second phase of the project so it would be good if you can tell me your availability. If you are available, we will discuss timeline and price after we send you documents. Best regards, Tanja

Part-time recruitment for fashion store tracking in NY/LA/BOSTON/ORLANDO. Take photos of local chain offline fashion stores, mainly focusing on shelves and product images. Photos are only for project analysis and will not be used for any commercial purposes. Payment will be settled directly upon completion of the photos.

Part-time recruitment for fashion store tracking in NY/LA/BOSTON/ORLANDO. Take photos of local chain offline fashion stores, mainly focusing on shelves and product images. Photos are only for project analysis and will not be used for any commercial purposes. Payment will be settled directly upon completion of the photos.

...Shopify, specifically geared towards selling baseball, basketball, football cards, and Pokemon cards. Key Project Requirements: - Integration with Shopify POS: I want to use Shopify's POS system to manage our inventory and process transactions. - Inventory Management: I need a user-friendly way to add & update inventory promptly, including images. - E-commerce Features: The site needs to have search functionality, sorting options, and a simple, engaging design. Skills and Experience: - Proficiency with Shopify: You should have a good track record of setting up and customizing Shopify stores, with an understanding of how to integrate POS. - E-commerce Development: A solid grasp of user experience and an eye for design will be critical in making our produ...

I'm in need of an experienced WordPress Developer to create an Wordpress e-commerce POS system for me. This will be a platform for selling various products. Wordpress POS system A wordpress plugin to manage restaurant products, inventory, order and payments. The system must support: - taking food orders - taking drink orders - manage inventory - taking multiple orders - Keeping tabs and (adding items to a customer order until payment) - track states of food orders It does not need to support payment gateway (a NULL gateway for V1 is OK) Key Requirements: - Developing an E-commerce Website: The primary goal of this project is to create a fully functional e-commerce website using Wordpress. The site should be user-friendly, sec...

I'm looking for a skilled web developer to create a website dedicated to vacation rentals. Key Features: - The website should have a user-friendly interface to display a variety o...informed decisions. Ideal Skills: - Experienced in web development, particularly in creating user-friendly, inviting websites. - Knowledge of e-commerce and booking systems to facilitate the booking process. - Familiarity with integrating and displaying map data to highlight local attractions. The project does not require a payment system for online transactions, as all payments will be processed offline. However, you should be able to create a secure platform for users to reserve properties without making a payment. A key objective is to ensure a smooth, seamless booking process that maximizes u...

I am looking for an expert in Flutter app development who can create a functional app for both iOS and Android platforms. The main function of the app will be to scan URLs and extract informa...to gather information about potential scams, issues, or malfunctions connected to a particular URL. Ideal Skills and Experience: - Proficiency in Flutter development across multiple platforms. - Experience in creating URL scanning functionality. - Understanding of how to effectively extract and categorize scam, issue, or malfunction-related information from URLs. - Previous work with creating offline storage for the extracted information. Your bid should outline your experience with Flutter, particularly as it relates to URL scanning and data extraction, and propose a plan for developing...

...create an aesthetically pleasing and user-friendly Point of Sale (POS) software for my restaurant and retail business. The software will be used on both desktop and mobile platforms to handle tasks that include inventory management, sales tracking, and customer management. Key Requirements: - Create a modern and minimalist design: As a designer, you should be proficient in creating sleek, clean, and easy-to-navigate interfaces that align with the modern and minimalist aesthetic. - Design for both Desktop and Mobile: The software is intended to be used on both desktop and mobile platforms. Experience in designing for cross-platform applications is a plus. - Prior experience with POS software: Experience in designing for POS software, especially in the retail or res...

...developer to create a custom autofiller application for me. Please skip the questions on the platform that were not answered.+ 1. After every update/new change build number , lets change autofiller to 4.0 2. After every change moving forward move the build number up a little 4.1,4.2 3. Change “Refresh button to “ Button that says “Refresh” 4. Integrate SQUARE POS API ..SYNC Name. DOB, address . number to (POS) add to customer list 5. Change background color of entries window to #cee4ed 6. Make autofiller open base pdf so users can change base via adobe so form isn’t broken and remove global autofiller programming a. date formatting, checkboxes should be working after this 7. Add Na to interpreter output of pdf when patient selects no inte...

I am seeking an experienced Django developer to make specific modifications to the Single Invoice Page on my current POS web application. The chosen candidate would: - Update the layout of our invoices for enhanced aesthetics and usability - Customize our invoice numbering system for enhanced organization and tracking Another critical aspect of this project involves implementing a few strategies I have envisioned to boost sales and simplify our processes. These strategies include: - Streamlining our checkout process to quicken and optimize customer transactions - Implementing barcode scanning for products to speed up the billing process, with a preference for integrating barcode scanner hardware - Integrating an inventory management system to ensure our stock levels are always ac...

My tech project involve...project involves two main components: 1. Building a desktop app 2. Enhancing and updating our existing Django web app. The ideal freelancer for this job would have robust experience in Python, Django and desktop app development. Desktop App Development: This involves creating an app with key features like user authentication, data synchronization, reporting and analytics. The app should also have offline capabilities and be capable of integrating with third-party APIs. Django Web App Improvements: The existing web app needs two key enhancements - addition of new functionalities and performance optimization. An eye for detail would be beneficial in discerning where these improvements can be best made. Get in touch if you've the skills and experienc...

I am looking for an expert in Flutter app development who can create a functional app for both iOS and Android platforms. The main function of the app will be to scan URLs and extract informa...to gather information about potential scams, issues, or malfunctions connected to a particular URL. Ideal Skills and Experience: - Proficiency in Flutter development across multiple platforms. - Experience in creating URL scanning functionality. - Understanding of how to effectively extract and categorize scam, issue, or malfunction-related information from URLs. - Previous work with creating offline storage for the extracted information. Your bid should outline your experience with Flutter, particularly as it relates to URL scanning and data extraction, and propose a plan for developing...

...experience while still maintaining visibility. Real-time Watermarking during Live Classes: As users participate in live classes and stream content in real-time, the platform will apply watermarks dynamically to ensure that any screenshots or recordings captured during the session are traceable to the original user. Watermarking on Downloaded Materials: When users download course materials for offline access, such as lecture notes or supplementary resources, the platform will embed watermarks directly into the content files. This adds an additional layer of protection against unauthorized distribution or sharing of downloaded materials. Persistent Watermarking Across Devices: Regardless of the device or platform used to access the content, the watermarking mechanism will remain...

I need Backend ...bar for friends or posts . Add, delete, Block unblock friends or followers on pages . Friends List with friend or Unfriend tab . Create Pages with follow and Unfollow & anyone can send messages to the page . Edit & delete & report Post, pages and accounts . Messaging, voice notes sending Pics, Docs, contacts, location, audios, videos via chat Video call Group chat archived chats, online or offline time ago . Friends only can send messages or contact to each other . User profile info (edit profile pic or bio, private profile or public profile, details section for work education etc. and all normal features inside it) . Settings (Delete or deactivate account etc. , edit account information, birth, name, Email). .Dashboard to delete or deactivate ...

I'm in need of an experienced POS developer who can create a merged restaurant and retail POS system. Key functionalities for the restaurant POS need to include table management, online ordering, and inventory management capabilities. For the hardware component, I require the system to be compatible with touchscreen monitors, thermal printers, and barcode scanners. Ideally, the freelancer should possess prior experience in developing similar systems and possess deep understanding of integration of these functionalities with respective hardware. Experienced in: C# and hybrid framework of C# And Laravel for the backend

I'm in need of qualified tutors to provide both online and offline education in Chandigarh, Panchkula, Mohali, Kharar, Landran, Zirakpur and New Chandigarh. Covering an array of disciplines, your expertise will support home, institute and school learning environments. Key Requirements: * Possess a Bachelor’s degree * Offer on location tutoring or online sessions * Ability to provide teaching either at your location or within various institutes * Comfortable with home tutoring or school support Application Must-Have’s: * Full Name * Qualification * Relevant Experience * Date of Birth This is a fantastic opportunity for experienced educators looking to expand their portfolio and engage with a diverse student community.

I'm looking for a skilled developer to create a robust, user-friendly Point of Sale (POS) and Inventory Management System for my hardware store. This system will help streamline my store's daily operations, from sales transactions to inventory tracking. Key requirements include: - Developing a POS system that can handle sales transactions efficiently and accurately - Implementing an inventory management system that can monitor stock levels, track sales histories and generate reports - Ensuring the system is user-friendly and easy to navigate for my store staff The ideal candidate for this project should have: - Previous experience in developing POS or inventory management systems, preferably for hardware stores - Proficiency in relevant programming languag...

...project (a page with info about the project, text) -- A guide (very simple instructions on how to use the app) Even the menu and the text contents of the pages should be in Italian (for Italian users) and English (for every other language users) The app could be web app (no app to install for the users) or native app. In case of native app, it would be preferable to give the option for an offline experience, basically preloading the multimedia contents, or online experience with streaming media (in order to minimise the app size). Also a previous version fully functional (missing only the recording feature) has already been released and is available on the stores (android and iOS) as reference. It has been developed with Unity and Vuforia plugin, but other solution co...

...develop a simple, user-friendly inventory management system. This system will be an Android application, working primarily offline and featuring integrated barcode scanning capabilities. Key Functionalities: - Stock Level Tracking: The core function of the system will be the ability to track the stock levels of various products. This includes adding new products, updating existing ones, and removing products when they are no longer in stock. - Barcode Scanning: The system should support barcode scanning. This feature should allow the user to quickly and accurately update inventory levels by scanning product barcodes. Key Requirements: - The system should be designed for offline use primarily, with the ability to sync data when network connections are available. - The sys...

We are looking to change the user interface of the ultimate POS software, we have a UI/UX designer who already designed it the way we want it to look like, we just need a good developer to implement the design. We are not adding any new feature. This is open for only those who have experience in customizing and working with that POS

I am looking for a competent mobile app developer to create an Android Internet Radio app that features a mix of content, including talk shows, music, and news and sports. This is what I require: - Development of the app solely for the Android platform - It would be a bonus if the app can support offline listening, but this is not a definitive requirement – I am open to discussion on this point. I provide access to my play store for the person to deploy the app. I will also submit the online radio link Ideal skills and experience: - Proven experience in mobile app development, especially in creating high-quality Android applications - Strong knowledge and experience with internet radio app creation would be highly advantageous - Exceptional understanding of the Android d...

Integrated Al-Quran Education System Development Brief: Create a digital platform for Al-Quran education that features student progress tracking and transparent reporting. The system will utilize PHP Laravel, Flutter or .NET Core, with MySQL/MariaDB on a Linux server. Key Features: User registration for different roles: Admins, Teachers, Guardians, and Students. Payment options both online and offline. Attendance and performance monitoring tools. Video tutorials for Quranic concepts. Requirements: Experience in educational technology. Quick turnaround and budget adherence. Deliverables: Complete web application. User guide and maintenance support. Proposal Needs: Approach, timeline, and cost.

I'm seeking a skilled PHP/MySQL developer to create a custom PHP POS application. This job will require you to have good experience in PHP/MySQL. You will be paid on a task-based. We will test you with some sample tasks. To be eligible for further discussion I want you to have a look into the portal by visiting the below link and create a free account and try the portal give me one issue you have faced and can be improved in the portal. If you are unable to do above then your application will be rejected immediately.

I'm looking for a skil...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 online payment gateway like PayPal or Stripe for the future, for now, we'd like to stick with offline cash payments. Ideal candidates for this project should have experience in: - Developing and integrating online scheduling and payment systems. - Working with Fittlebug or similar appointment scheduling platforms. - Creating intuitive and user-friendly interfaces. If you have experience in similar projects and can help us implement these fe...

I'm looking for a skilled developer to c...good relationships with our customers. - E-commerce Integration: Development of a functional e-commerce website and application. - POS: A point of sale system for store transactions. - WhatsApp Features: Integrating WhatsApp for customer communication. - Reminder and Offers: Sending reminders and offers to customers. - Mobile Application: Developing a mobile application for store management and billing. The ideal candidate should have experience in: - ERP system development. - E-commerce software development. - Creating mobile applications. - Working with CRM, Credit, and Finance Management systems. - Integrating WhatsApp features into applications. - Developing POS software. Please provide examples of previous similar projec...

...my stock of jewellery items, including tracking and updating inventory levels in real-time. - Sales and Order Management: A seamless system to handle the processing of orders and managing sales records effortlessly. - Customer Relationship Management (CRM): A centralized platform to store and manage customer information, with a focus on providing personalized and exceptional customer service. - POS & Credit Management: An integrated point of sale system that also incorporates credit management functionalities. - Finance Management: A module dedicated to tracking financial transactions, generating reports, and managing financial records. Additionally, I'm interested in the following eCommerce functionalities: - Product Catalog Management: The ability to easily create, up...

We have a Pos software developed with React.js for front office and using asp.net for back office and need to integrate our system with Shopify and synchronize Orders and inventory between two systems. I need someone who has experienced this integration before. Please type #SHP# in the beginning of your reply and explain what exactly have you done before, what has been sent to Shopify and what has been received to add on Pos to synchronize two systems?

...for an experienced Android developer to create a tablet version of my product catalog app. Key Features: - Offline Functionality: The app should be able to work without an internet connection, allowing users to access product information at all times. - Tablet-Optimized UI: The UI should be designed to provide an amazing experience on tablet screens, making use of the extra real estate and ensuring smooth navigation. - Multi-language Support: The app should support multiple languages, allowing users from different regions to easily understand and interact with the catalog. Ideal Skills: - Proficient in Android development, particularly for tablets - Experience with implementing offline functionality in Android apps - Strong UI/UX design skills, especially for tablet int...

Odoo expert needed Key responsibilities: - Establishing an effective CRM system that is tailored to my retail business needs. - Implementing a robust POS system that can efficiently manage sales, track performance, and generate reports. - Designing an inventory management system that optimizes stock levels and tracks movement. - Creating a customer management system that facilitates targeted marketing and customer relationship building. The platform for all these systems should be on-premises. Hence, the ideal candidate should be proficient with setting up on-premises solutions. If you have experience in a similar retail setup and can provide references, it would be a plus. Please bid only if you have prior experience in setting up these systems in a retail environment.

...function, users can top up on their own. • IM Module Development o Build IM Architecture Platform: Use Netty to implement instant messaging (IM) functionality in Java. o User Authentication: Used to verify user identity, common authentication methods include username and password, OAuth, two-step verification, etc. o Presence Management: Manage and display user statuses such as online, offline, busy, invisible, etc. o Message Transfer: Implement message sending and receiving between users, including text, images, audio, video, and other formats. o Data Storage: Supports more intuitive viewing of accounts under groups. o Network Communication: Manage network connections between clients and servers, usually using TCP/IP protocol, sometimes combined with techn...

I am searching for an experienced app developer who excels in designing and implementing Android-based applications. The main functionality required for this task is the creation of a comprehensive employee database system. Key Functionalities: • Instant tracking of employees' online and offline status • Storing and displaying contact details of each employee • Categorizing employees based on their department The developer should have a strong understanding of database structuring and management for Android systems and a proven track record of delivering similar projects. Familiarity with real-time data sync and user-friendly UI design are also desirable.

...business development reps should not apply. We are only seeking to work with one to three people maximum and agencies should not apply. Key Responsibilities: Design and develop a user-friendly mobile application for iOS and Android platforms. Implement AI and NLP (Natural Language Processing) features for online interaction with users with future development for offline interactions. Integrate selective caching for offline access to critical conversation threads. Work with RESTful APIs for server-side features and NMEA (National Marine Electronics Association) data integration. Develop and manage a comprehensive database to handle user profiles, chat histories, and app analytics. Collaborate with UI/UX designers to ensure the app is intuitive and engaging. Ensure the ...

I am seeking a developer to create an in-depth offline property abbreviation dictionary portal, accessible as a desktop or mobile application, allowing users to easily search and access property-related abbreviations and their full meanings without requiring an internet connection." Key requirements: ▪︎ The website should provide comprehensive word definitions ▪︎ Include abbreviations and provide their full definitions ▪︎ Both word definitions and abbreviations must be thoroughly explained Ideal Skills: ▪︎ Proficiency in website development ▪︎ Experience in creating educational resources or similar platforms ▪︎ Excellent command of the English language ▪︎ Attention to detail, ensuring accuracy and completeness of every word definition and abbreviation. Through this platf...

...modern and sleek logo specifically for our POS (Point of Sale) system tablet based , This POS system is not a bank swipe machine it's a system for taking orders. Key aspects: - Design a logo suitable for a POS system: The logo should be designed keeping in mind that it will be used in a sales transaction system. - Incorporate the Company Name: The logo should prominently feature our company name. - Modern and Sleek: I'm looking for a modern, sleek and professional design, in line with the modern POS system usage. Company Background: We are a company offering a Point of Sale (POS) system. We currently have a logo for our company but are looking to create a new logo specifically for our POS system, cropping our company name Nicksconsul...

The objective of this assignment is to develop a comprehensive database system. The Database should support, among others, member registration, subscription tracking, member services management, and trade references. The system should facilitate data import from Excel and accommodate online and offline accessibility based on the user’s capacity to meet online hosting costs. Member Registration: Develop a module for member registration capturing key details such as Name, address, and any other contact information. Village, group, area, district, province, sub-group affiliation (e.g., Study circle, VSLA, commodity association etc.) Demographic information (age, gender, household size, etc.) Implement functionality to adapt and import member data from Excel sheets. Enable diff...

We require a dedicated, reliable professional to develop an in-house, offline admin application. The core functionality of this application should revolve around customer management, including but not limited to: - Creating and managing customer profiles - Uploading and storing customer-related PDF documents - Printing customer documents and profile details - Generating reports from collected customer data In terms of skills and experience, proficiency in software development, particularly for offline applications, is paramount. Experience with database management, report generation, as well as familiarity with handling PDF files is also desirable. Further project specifics, including total cost and timelines, will be discussed upon initial interest. Please also note tha...

I'm in need of a creative freelancer who can craft eye-catching POS material, specifically posters for in-store displays. You will be given all the images you need and a rough mock up of what we are looking for as well as a list of what MUST be added to the posters. The tag line is not like the mock up shown - instead we want it to be ''Making Life Easier'' All fonts should be Futura BK BT and our colours are red and green, their colour codes are: Green - #7AC143 Red - #ED1C24 Once the project is complete, you will send the graphics via PDF for review and print as well as the AI file for our company to keep on file for future needs. Ideal Skills and Experience: - Proven experience designing POS Material, particularly posters - Strong visual and...

I have an existing simple Android app written in Kotlin. I have a need to make some minor adjustments to it. It interacts with a Google Firebase Realtime database. The app is a very simple Proof of Delivery recorder,. It loads a driver's "diary" from firebase and allows the driver to ma...that he has finished. This data is then sent back to firebase. I need a few small enhancements: 1. mark a job as "completed" in a separate date/time field 2. allow the user to "scan" a document rather than taking a photo. This would then be stored as a PDF. a scanned document provides better clarity than a photograph. This would be mandatory and photos optional 3. ensure it operates correctly "offline" ie in areas without mobile coverage. Data then ne...

Looking to develop a hiking App in Flutter. Key Requirements: 1: It will need to work both online and offline and display/use offline maps. (Normally a topo map. ) 2: It will need to allow the user to select different layers to display, eg / tracks / waterways / POI. These could be Polygon shape files, CSV files, KML or GEOJSON files. 3: It will need allow the user to save: tracks as they hike around, POIs, and maybe take a photo at a point and Geolocate it? 4: User will need to be able to add/save waypoints 5: User will need to be able to select items in KML /shape files to display data.

...characters through fixed price listings. There's no need for an auction-style bidding system or direct messaging between buyers and sellers. - Server Status Section: This part of the website should provide information on the current online player count, server uptime/downtime history, and real-time server latency/ping display. It should also clearly indicate if the server is currently online or offline. - How to connect section. - Donating system, website will have own currency which you can earn from donating system with real money. with that currency you can buy items/equip into game. Additional Features: - Forum: A community forum where players can discuss the game, share tips and strategies, and ask questions. - Info Announcement: An area where server admins can post i...

We need android developer for touch pos restaurant we have already database we provide you design need development of product

Hi Abdul H., I had been in communication with you regarding the website and we had discussed in detail downloading various links. Are you able to go ahead with this please?

We are in need of an expert with extensive experience in CLEAR POS Point of Sales (POS) systems running on Windows. The system has an inventory with over 500 products. The primary functionality I require assistance with includes inventory management, sales tracking, and store to website syncing.. Key Requirements: - Proficiency in Windows-based POS systems - Prior experience working on Clear POS () - Ability to streamline and optimize POS processes with website ecommerce Check the attachment for further details. Be sure to add CPOS12 to your bid or it will be considered spam , ignored and removed.

I'm looking for a skilled web developer to revamp my current website, which is built on WordPress and Elementor free version. The key additions I'm looking for include user registration and form functions. Once users are registered, they should be able to upload files and provide payment information (note: no live payment processing is required, just secure capture of payment details for offline processing). Requirements: - Design makeover: Enhance the look and feel of the current website - User registration form: Incorporate fields for first about 8 fields. - File upload capability: Users should be able to upload documents, images, and videos Skills and Experience: - Proficiency in WordPress and Elementor - Strong knowledge of web design and user interface principles - ...

I'm in need of a cloud-based POS system specifically designed for movie theatre ticket sales, integrated with an Android app. I'm looking for an experienced developer who can bring this vision to life. Key Features: - Cloud-Based POS: The system should be user-friendly and accessible from any location. - Inventory Management: The POS should allow for easy tracking and management of ticket inventory. - Sales Reporting: I need a comprehensive sales reporting system that provides insights on movie ticket sales. - Customer Management: The system should be able to store basic customer details for future marketing and analysis. The Ticket Sales: - The ticket sales will be done physically at the theatre; hence, the system should be optimized for this env...

I need a proficient software developer to build an offline multiple-choice question (MCQ) exam software compatible with Windows operating system. The primary purpose of this software is to conduct exams for learning institutions. Key Features Required: - The software should have a score tracking feature that effectively keeps track of students' exam progress and results. Ideal Candidate: The perfect match for this job should have substantial experience in software development, particularly in developing educational tools. An extensive understanding of the Windows operating system is crucial. Proficiency in programming languages like Java, Python or C# would be beneficial. Familiarity with creating scoring algorithms and a good grasp of user-interface design are also required.