Web design and development in birminghamdela

...developer will have my support for the design. I am a designer with over 25 years of experience. The estimated completion time is 1 month, plus an additional month or two for potential fixes and adjustments. The client is a group of highly experienced programmers who develop complex applications for managing large companies. Some complications are expected. They want WordPress primarily because they want to be able to change certain content on the website themselves (blogs, testimonials, events) later on and don’t want to be dependent on me or anyone else. I also need annual support in case of issues or changes. Personally, I am a recognized designer in my country, and I’m actually looking for someone with whom I can offer web...

Zdravo, Imamo iOS app, ki je deloma ze koncan, vendar bi potrebovali pregled in pa implementacijo zahtevnejsih zadev (custom mape, login ipd.). Rabimo torej izkusenega Swift programerja. Ce si pripravljen sodelovati, se pogovorimo o podrobnostih. Lp Alen …

I'm seeking a dedicated professional to assist in the ongoing maintenance of our functioning WEB API. This is a REST API built using VB.NET and MySQL. Key Responsibilities: - Modify existing VB.Net code as required - Make necessary changes to the MySQL database - Troubleshoot any problems that arise - Deploy the API on alternate servers when necessary - Implement new feature development as needed Ideal Skills: - Proficient in VB.NET and MySQL - Experience with REST API development and maintenance - Strong problem-solving skills - Capable of feature development This project is long-term and I would appreciate an hourly quote with a minimum charge per engagement. Please provide: - Your required advance notice for m...

Google ads for my software training institute business in Tamil Nadu. We focus more on online trainer, but we have office as well for direct training institute Velachery. Full stack Development, software testing, Artificial Intelligence, AWS Cloud, Data Science and Analytics The primary goal is to increase online sign-ups for our training programs. The campaign should specifically target professionals looking to upskill in Full stack Development, software testing, Artificial Intelligence, AWS Cloud, Data Science and Analytics. The monthly ad spend will be $1,000 - $2,000..

...business research, and strategic execution. This AI must be fully autonomous, continuously improving itself, executing complex tasks, and interacting with me through chat in multiple languages (especially Albanian and English). Key Functionalities & Requirements: 1. Continuous Deep Learning & Research The AI must continuously learn from multiple sources, including websites, books, academic papers, forums, and real-world applications. Areas of learning must include (but are not limited to): Hacking & Cybersecurity: Ethical hacking, penetration testing, security exploits, encryption, and counter-attacks. Programming & Development: Python, Perl, .NET, C, C++, C#, Java, PHP, JavaScript, and more. Electronics & H...

I'm running a subscription-based business and am in need of a professional web developer. The website will require: - Integration of various payment methods including Credit/Debit Cards, PayPal, and Bank Transfer. - Subscription management features such as automatic renewals, user account management, and different subscription tiers. 4 web pages

I'm seeking a seasoned game developer to construct a tailored gaming server from scratch. The server needs to incorporate specific elements such as artifacts, anomalies, mutants, and dungeons. Key Requirements: - Proficient with Custom Engine for game development. - Implement crafting as a core game mechanic. - Integrate energy-based artifacts within the game. Ideal Skills: - Extensive experience in designing and developing game servers. - Profound understanding of crafting systems in games. - Creative skills to design various energy-based artifacts.

I'm looking for experienced mobile app programmers to develop an iOS/Android service app. This app will serve a specific need, and I need someone who can understand and implement the necessary features for a service-oriented app. Ideal Skills and Experience: - Proficiency in iOS/Android app development - Prior experience in creating service-oriented apps - Excellent understanding of user interface and user experience design - Strong problem-solving skills - Ability to deliver on time

I am seeking a proficient web developer to assist with the creation of an E-commerce website for a new brand, 'King Moore'. The purpose of this project is not just to sell products, but to build a strong, recognizable brand in the process. Key responsibilities include: - Developing an E-commerce website that is user-friendly, visually appealing and aligned with the 'King Moore' brand identity. - Implementing features that will enhance customer experience and promote brand loyalty. - Collaborating with me to ensure the website reflects the values and vision of 'King Moore'. Ideal candidates will have: - Proven experience in E-commerce website development. - A strong understanding of brand development ...

...Chrono24 and Revive.Rebuy. This project prioritizes: - Scalability: The platform should be able to accommodate growth without performance issues. - Ease of Use: A user-friendly interface is key to attracting and retaining users. - Premium User Experience: The marketplace should reflect a high-end, luxury feel. - Mobile Responsiveness: The platform should be fully functional across all mobile devices to reach a broader audience. - Security: Ensure the platform is protected against threats, with secure payment processing and data protection measures. - SEO Optimization: Implement SEO best practices to improve the platform's visibility in search engines. This project is Phase 1 of a larger development plan. I'm looking for a developer who can ...

...expert in AI and CRM systems to create a sophisticated, A.I integrated CRM for my business. Key Features: - Customer Data Management: The CRM should allow for comprehensive tracking and management of customer data. - Automated Email Campaigns: The system should be able to automate email marketing campaigns. - Sales Tracking and Reporting: It should provide robust features for tracking sales and generating reports. - Generation of AI Avatar from Text: A unique feature where the system can create AI avatars from provided text. The level of AI integration required is beyond basic automation. The ideal candidate should be able to incorporate advanced analytics and insights into the system, helping to predict customer behavior and sales tre...

I'm looking for a proficient app developer who can design and develop an Hours Management App compatible with iOS and Web platforms. The app should cater for business locations and encompass the following core features: - Employee check-in/check-out: The app should provide a smooth and efficient check-in/check-out system for employees. Moreover, the app needs to have a sophisticated User Access Control system, allowing for different access levels. This would ensure: - A secure and organized system where information is accessible based on the user's role. Ideal skills for this project include expertise in iOS and Web app development, with a strong focus on user access control systems. Prio...

I'm looking for a skilled developer to help me create a mobile app. This app will be a social networking platform targeting Android users. Key requirements: - Extensive experience in mobile app development, specifically for the Android platform. - Proficiency in creating interactive and user-friendly UI/UX designs. - Strong understanding of social networking app features and functionalities. - Ability to implement security measures to protect user data. - Good communication skills to understand and translate my ideas into the app. I am new to this platform, so I welcome anyone who can help me with this project.

I'm seeking an experienced developer to create an Iframe for a sportsbook betting website. This Iframe will...an experienced developer to create an Iframe for a sportsbook betting website. This Iframe will display comprehensive gaming feeds, including live game updates, upcoming game schedules, as well as betting odds and statistics. The data will be sourced from a provided JSON response API. Key Requirements: - The Iframe must provide real-time updates with live game feeds. - It should be capable of supporting all sports, including soccer, basketball, and tennis. Ideal Skills: - Strong experience in Iframe development. - Proficient in working with JSON response APIs. - Prior experience in creating sports betting related interfaces is a plus...

...Responsibilities: - Design and develop an engaging, user-friendly social networking app - Ensure the app is fully functional and free of bugs - Implement features typical of social networking platforms, such as user profiles, posts, comments, likes, and friend requests - Optimize the app for Android platform - Integrate real-time chat functionality for user interactions - Enable integration with other social media platforms for easier sharing - Develop a comprehensive notification system for user alerts - Develop a secure authentication system using OAuth or similar methods Ideal Skills: - Extensive experience in Android app development - Previous work on social networking apps highly desirable - Strong understanding of user experience and...

I am in need of a sales professional with strong client handling and servicing skills. This individual should be fluent in English, with a background in sales or counseling, and have exceptional negotiation abilities. Key Responsibilities: - Cold calling potential leads and converting them into clients - Providing excellent client servicing and handling - Negotiating deals and contracts Ideal Candidate: - Experience in Marketing industry - Proven track record in Sales - Fluent English speaker - Exceptional Negotiation Skills - Experienced in dealing with Businesses

I'm looking for a skilled web developer to create a vintage and classic style website for my barbershop. The website should embody a timeless aesthetic, while also being modernly functional. Key Features: - An appointment booking system that is user-friendly and efficient. - A photo gallery showcasing our unique haircuts and styles. - A clear and accessible pricing page. Homepage Content: - A section dedicated to telling our barbershop's story and introducing our fantastic team. - A spot for highlighting special offers and promotions. - A space for customer testimonials to build trust and rapport with our site visitors. Ideal Skills: - Proficiency in web development and design, with a p...

Desarrollo de software de IA para la gestión educativa en Angola ?? ? Proyecto: Desarrollo de Software de IA para la Gestión Educativa en Angola ? Descripción general: Buscamos un desarrollador o equipo especializado en Inteligencia Artificial (IA) y Big Data para crear software innovador para el Ministerio de Educación de Angola. El sistema debería poder analizar, comparar y generar informes detallados sobre el desempeño académico de los estudiantes, la eficiencia de los docentes y la calidad de las escuelas en diferentes regiones del país. El software utilizará inteligencia artificial y aprendizaje automático para procesar grandes volúmenes de datos y generar conocimientos estratégicos para mejorar la ...

I'm looking for a skilled copywriter to craft informative and technically-rich articles for my website. The articles should be SEO-friendly and cover topics like website development, AI, and SEO. Key Responsibilities: - Write engaging, SEO-optimized articles on tech and development topics - Target content to be accessible for all readers, from industry professionals to the general public - Ensure content is informative and technically sound Ideal Skills: - Strong background in copywriting, particularly in the tech industry - Proven experience with SEO - Understanding of website development and AI - Ability to write for a diverse audience Please note, I will only work with freelancers who apply through the...

...Users can find and list properties just by speaking or uploading pictures, making it easy even for uneducated users. 2. AI Chatbot & Virtual Assistant – A smart assistant helps users buy, sell, and rent properties, answers real estate questions, and guides them through legal processes in multiple languages. 3. AI-Driven Property Recommendation System – Suggests the best properties based on user preferences, budget, and search behavior, making property hunting smarter. 4. Price Prediction AI – Analyzes market trends to estimate future property values, helping buyers make informed investment decisions. 5. AR/VR Virtual Property Tours – Users can explore properties remotely and even visualize furniture placements...

I'm in need of a seasoned developer for a dual-platform (Web & Mobile) staffing and recruiting application. This project demands a rich knowledge of the staffing and recruiting industry, as well as extensive experience in Web and Mobile app development. Key Features: - Job posting and application management - Candidate screening and tracking - Analytics and reporting - Customer and Recruiter login panel - Talent matching - Chat feature - Complex calculations - Requirement posting - Resume upload feature for candidates - Interview scheduling and calendar integration - Email and SMS notifications for updates and status changes - Video interviewing capabilities for remote assessm...

I'm looking for an experienced web developer to create a top-notch, professional E-commerce website on Shopify for me. The website should be user-friendly, responsive, and capable of handling multiple transactions efficiently. The refrence site is : Key Features: - Incorporation of user reviews: This will help to enhance customer interaction and trust towards the products. The ideal candidate for this job should have extensive experience with Shopify, and E-commerce website development. Skills in UI/UX design will be a plus. A portfolio showcasing previous E-commerce projects will be highly regarded. Please ensure to include such a portfolio in your proposal.

...iOS, Android, and Web platforms. This project involves implementing core features such as ride booking, payment processing, and driver tracking. Key Requirements: - The app should cater to three distinct user roles: Passenger, Driver, and Admin. - Implement an accurate fare calculation system that takes distance, time, and traffic into account. - The app must include secure user authentication mechanisms for all user roles. - Enable in-app chat functionality for communication between passengers and drivers. - Include features for promotions and discounts that can be managed by the admin. - Incorporate a driver rating system to maintain service quality. - Ensure robust geolocation services for accurate pick-up and drop-off...

I'm seeking a professional web developer to create a webpage. A similar site already exists: I wish to copy the functionality of this site and it's user journey. The site facilitates payment of the London ULEZ charge. It allows a user to enter their car details, dates of travel, email address and then make payment via STRIPE (). The site also looks up the vehicle details using the DVLA Vehicle Enquiry Service (VES) API () The first phase of this project is to: - copy so that it has the similar content and the same user journey. - Write out the details

Project Description: We are looking for an experienced fintech software development team or a full-stack developer to build the MVP (Minimum Viable Product) for Thawed—a prepaid card solution designed to promote financial inclusion and emergency savings in the UK, with plans for global expansion. The app will integrate with prepaid card APIs, offer budgeting tools, manage frozen funds until two weeks before payday, and include cashback features with partnered retailers. Key Features: User Onboarding: Simple registration with KYC compliance Support for unbanked users (minimal documentation) Wallet & Card Management: Virtual prepaid card dashboard Fund freezing mechanism with scheduled release Balance tracking and transaction history Budgeting T...

I am looking for a freelancer who can develop a series of K-12 math questions and answers for me. These should cover all math topics and specifically be in the format of multiple choice questions. Key Requirements: - Development of K-12 level math questions to prepare for Math bee competitions - Coverage of all math topics - Exclusive use of multiple choice format - Strictly no questions generated by AI tools -You can use them for formatting Ideal Skills and Experience: - Strong background in mathematics - Experience in educational content creation - Familiarity with K-12 curriculum - Excellent understanding of multiple choice question design

I am looking for a talented developer with a strong background in programming the ESP32 microcontroller and implementing the Modbus protocol. The task involves writing code for the ESP32 that can effectively interface with an energy meter. The code should accurately and efficiently read and process data from the meter. Key Responsibilities: - Developing code in the Arduino IDE to control the ESP32. - Implementing Modbus protocol for communication with the energy meter. - Ensuring accurate data handling and communication. Ideal Skills & Experience: - Extensive experience with ESP32 programming, specifically in the Arduino IDE. - Strong understanding and previous experience with Modbus protocol. - Experience with data handling fro...

I'm seeking a skilled mobile app developer for a business-related project. The focus will be on developing a high-quality mobile application, with an emphasis on functionality and user experience. Ideal Skills and Experience: - Proficient in iOS and Android app development - Experience with cross-platform development tools - Strong understanding of user interface and user experience design - Excellent problem-solving skills - Ability to deliver on time and within budget

...other based on predefined rules stored in a JSON file. The game will be displayed on a website where viewers can watch the battle unfold with play, pause, and speed control buttons. How It Works Game progress is stored in JSON file. The entire game logic (player stats, movements, attacks, special abilities) is defined in a JSON file. Each agent has attributes like health, attack, defense, energy, position, and abilities (e.g., Dodge, Block, Bribe). Simulation Engine A program reads the JSON file and simulates the battle step by step. Each agent makes decisions (move, attack, heal, dodge) based on their attributes and surroundings. The game progresses until only one agent remains (winner). Website Interface Live Game Board: Shows agent...

I am looking for a highly experienced team to develop a mobile application for both iOS and Android platforms. The app will serve as a social networking platform and it needs to be a web-based application. Key Requirements: - Minimum of 6 years of experience in UI and UX design - Proficient Front End Developer skilled in Javascript - Backend Developer experienced with MySQL or PostgreSQL Your expertise will be crucial in creating an engaging and user-friendly interface, as well as a robust and efficient backend. Understanding of social networking app features and trends will be a plus. Please provide examples of your previous work in your bid.

As a developer, your task will be to build a comprehensive online exam website tailored for students. ...comprehensive online exam website tailored for students. This platform will administer various types of exams, predominantly multiple choice and essay questions. Key Features Include: - Dynamic loading of exam data - User-friendly interface for test-taking and response submission - Secure, efficient storage of exam data and responses in Google Cloud Ideal candidates for this project should possess: - Strong web development skills - Proven experience in cloud integration, specifically with Google Cloud - Proficient in database management - Capability to design for a student demographic Please share your portfolio, propose...

Tinder Automation Bot Developer – Human-Like Auto Swipe, Messaging & Unmatching (Mac Compatible) Job Description: I’m looking for a developer to create a Tinder automation bot that runs directly on my MacBook. The bot should swipe right on all profiles, send a message with my Instagram handle, and automatically unmatch users after a few days to prevent Tinder from slowing down. The bot must mimic human behavior to avoid detection. Additionally, if my account gets banned, I want to easily switch to a new account without needing major reconfiguration. Key Features & Requirements: ✅ Auto Swipe Right (Human-Like Behavior) • The bot should swipe right on all profiles but with randomized delays (5-15 seconds per swipe) to look natural. • Should include...

I'm looking for an experienced game developer to create a mobile (iOS/Android) ...winning platform centered around a multiplayer golf game. Key Features: - Single Game Launch: The initial project will focus exclusively on the golf game, with plans to expand to different games in the future. - Multiplayer Format: The game should be designed for multiple players, fostering a competitive and engaging environment. - Real Money Component: The platform needs to incorporate a secure and fair real money winning feature. Ideal Skills and Experience: - Proficient in mobile game development, particularly for iOS and Android. - Previous experience with creating multiplayer games. - Knowledge in developing secure online gaming platforms. -...

I'm looking for a seasoned web developer with experience in creating fantasy sports and betting websites. The site should be similar to Dream 11, but with a unique twist. Key Requirements: - The website should cover three major sports: Football, Cricket, and Basketball. - The primary focus will be on fantasy sports betting. - Integration of a secure and reliable payment gateway is essential. Ideal Skills: - Proficient in web development, specifically in creating interactive, real-time sports gaming sites. - Experienced in integrating payment gateways. - Knowledgeable in the mechanics of fantasy sports and betting. Please provide examples of similar projects you've completed in your bid. ...

I'm looking for an experienced iOS developer who can build a productivity app with Xcode based on my existing designs. Key Requirements: - You will be provided with a complete set of designs, so design services aren't needed. - Your task will be to translate these designs into a fully functioning iOS application. - Strong Xcode proficiency is a must. - Previous experience with productivity apps will be highly regarded. Please note, the exact core features of the app have not yet been determined. As such, the ability to provide input on feature selection based on your experience and industry standards will be valued. Looking forward to your bids.

I'm seeking a seasoned game developer to construct a tailored gaming server from scratch. The server needs to incorporate specific elements such as artifacts, anomalies, mutants, and dungeons. Key Requirements: - Proficient with Custom Engine for game development. - Implement crafting as a core game mechanic. - Integrate energy-based artifacts within the game. Ideal Skills: - Extensive experience in designing and developing game servers. - Profound understanding of crafting systems in games. - Creative skills to design various energy-based artifacts.

I need a professional WordPress developer to create a basic but elegant website for my business. The site should only consist of a few key pages...professional WordPress developer to create a basic but elegant website for my business. The site should only consist of a few key pages: a Home page, an About Us page, and a Contact Us page. Key Requirements: - Proficiency in WordPress and web design - Experience in developing business-oriented websites - Ability to create user-friendly and responsive web designs - Good understanding of SEO principles I want the website to be visually appealing with smooth navigation. The ideal candidate would have a portfolio of similar projects that they can share with me. I am open to suggestions on h...

I'm looking for a professional web developer who can create a Real Estate website using the Houzez theme. The site will cater to both property sales and rentals. Key Features: - Property Listings: The listings should come with a search filter, photo gallery and contact form. - Additional Pages: The site should also have an 'About Us', 'Blog', and 'Testimonials' page. Budget: My budget for this project is 10,000 rs. Ideal Skills: - Proficient in WordPress and the Houzez theme. - Experience in developing real estate websites. - Knowledge of SEO and website optimization.

...a skilled developer to help design and develop a responsive, SEO-optimized, and performance-optimized Agency Box for our website. The Agency Box will showcase agency details in a clean and professional manner, ensuring it is user-friendly across all devices. Key Details: • We already have the necessary codes and design preview, so your task will primarily involve integrating, optimizing, and fine-tuning. • The box must be fully responsive (works seamlessly on desktops, tablets, and mobile devices). • It should be SEO-friendly, with proper HTML structure and semantic tags for better ranking. • Performance optimization is crucial to ensure fast loading times and smooth interaction. Requireme...

Project Title: Development of a Complete Debt Negotiation Portal (Front + Back) - AWS Windows Implementation Project Description: We are looking for a full-stack developer to build a complete debt negotiation portal, allowing customers to check their outstanding debts and negotiate repayment agreements efficiently through an integrated API. The system must include both front-end and back-end development, API integration, and deployment on AWS (Windows-based environment). Project Scope & Requirements: 1. User Flow & Features Home Page: The customer enters their CPF/CNPJ (Tax ID) and clicks "Negotiate My Debt." Name Selection: If multiple records are found, the user selects the correct name. API Data Retrieval: The system queries...

Job Title: Web Developer Needed for Exclusive Content Subscription Website Project Overview: I'm seeking an experienced web developer to create a modern, user-friendly website to sell and stream my exclusive content. The site should offer both one-time purchases and subscription-based access to premium content. The goal is to provide an exceptional user experience that reflects the uniqueness of the content offered. Key Features: Responsive Design: Optimized for desktops, tablets, and mobile devices. User Accounts: Secure registration and login system with profile management. Content Management System (CMS): Easy-to-use backend for uploading and managing various content types (videos, articles, images). E-commerce Integrati...

I'm looking for an experienced web developer to create a basic e-commerce website for me. Key considerations: - The website will primarily be selling physical products. Therefore, the developer must have experience with e-commerce platforms and understand the needs and requirements of such websites. - The site should be user-friendly, with a smooth navigation process to encourage potential customers to stay and browse. Ideal skills for this job include: - Proficiency in web development languages such as HTML, CSS, JavaScript, and PHP. - Prior experience with e-commerce website development. - Understanding of SEO and digital marketing strategies to help boost the website's visibility. - Ability to integrate s...

Job Title: Freelancer Business Development Executive Location: Remote Job Type: Freelance/Contract Job Summary: We are looking for a dynamic and results-driven Business Development Executive to join our digital marketing agency on a freelance basis. You will be responsible for identifying new business opportunities, building relationships with potential clients, and driving agency growth through strategic sales efforts. Your expertise in digital marketing trends, lead generation, and client acquisition will be key to expanding our client base and increasing revenue. Responsibilities: Identify and prospect new business opportunities across various digital marketing services (SEO, PPC, Social Media, Content Marketing, etc.). Develop ...

I'm in need of a skilled professional to develop a Virtual AI Assistant with a graphical interface. This assistant will primarily serve the purpose of retrieving various types of information, including product details, technical documentation, and general knowledge. Key Responsibilities: - Design and implement a user-friendly AI-driven virtual assistant - Ensure the assistant can effectively retrieve and present a variety of information Ideal Skills and Experience: - Proficiency in AI and virtual assistant development - Experience with creating graphical user interfaces - Familiarity with information retrieval systems - Knowledge of product information and technical documentation is a plus

First payment would be 1387 which is 25% of 5550 . Previously it was 5400 since we increased the amount of pets it is now 5550 . 15$ each pet so 35 in totals we rounded off to 500$ for pets

...separate user and administrator interfaces, supporting an affiliate program and modern, stock exchange-style design with floating windows for dynamic content. RTL and LTR language support is required. Overview BIC focused on attracting investors for real estate in Burgas, Bulgaria, offering three types of: Investments  Residential Real Estate at Initial Construction Stage  Investment in Agricultural Land for Private Construction  Buying Apartments from Banks at Low Prices for Resale Services Provided  Apartment Renovations  Client Support for Bureaucratic Matters including Bank Account Setup  Full Client Support Including Future Property Sales Platform Specifications 1. Design Modern, Stock Exchange Style; Dynamic content disp...

I need a Power App form designed for data entry, specifically for capturing user informati...specifically for capturing user information. This form will be integrated with workflows that generate a PDF and a CSV file, which then get sent to our service desk. Ideal skills for this project include: - Proficiency in Microsoft Power Apps - Experience with form design and development - Understanding of workflows and automated processes - Ability to generate and format PDF and CSV files - Familiarity with service desk communication protocols - Experience in using Power Automate for workflow automation. As the project does not specify which particular fields of user information are needed, the freelancer will need to use their exper...

I'm seeking a seasoned game developer to construct a tailored gaming server from scratch. The server needs to incorporate specific elements such as artifacts, anomalies, mutants, and dungeons. Key Requirements: - Proficient with Custom Engine for game development. - Implement crafting as a core game mechanic. - Integrate energy-based artifacts within the game. Ideal Skills: - Extensive experience in designing and developing game servers. - Profound understanding of crafting systems in games. - Creative skills to design various energy-based artifacts.

I'm seeking a seasoned game developer to construct a tailored gaming server from scratch. The server needs to incorporate specific elements such as artifacts, anomalies, mutants, and dungeons. Key Requirements: - Proficient with Custom Engine for game development. - Implement crafting as a core game mechanic. - Integrate energy-based artifacts within the game. Ideal Skills: - Extensive experience in designing and developing game servers. - Profound understanding of crafting systems in games. - Creative skills to design various energy-based artifacts.

I'm looking for an experienced blockchain developer to help me build an L1 coin on the Polkadot network. I haven't yet finalised the specific use or consensus mechanism for the coin, so I'm open to expert advice. Ideal skills for the job: - Extensive experience in blockchain development - Deep understanding of the Polkadot network - Ability to provide strategic insights on use and consensus mechanism - Proficiency in coding, testing and deploying blockchain solutions.