Viral apps 2018роботи

Технічне завдання на оновлення додатку на базі Android Мета: Оновити додаток, щоб він продовжував працювати на Android 13 версії та вище. Вимоги: Додаток повинен бути оновлений, щоб відповідати вимогам Android 13 версії та вище. Додаток повинен бути сумісним з різними пристроями та розмірами екрана. Додаток повинен завантажуватись з Google Play та працювати без помилок. Додаток повинен мати сучасний та інтуїтивно зрозумілий інтерфейс, що покращує користувацький досвід. У разі необхідності, функціонал додатку повинен бути розширений або покращений. Опис поточної проблеми: Додаток, розроблений раніше, перестав завантажуватись з Google Play, повідомляючи, що він несумісний з новими версіями Android. Рекомендовані кроки для вирішення

Треба зробити 3D картинку для ніші "Подарункові пакети". Зробити різнокольорову картинку. Портфоліо обов`язкове! Кубічний пакет. Зі стрічкою.

Музей "Технології минулого" шукає спеціаліста, який змігби створити анімаційні ролики про наші експонати. Також маємо деякий контент, хотілося б його об"єднати в проморолик

Ми будівельна компанія-девелопер, яка займається діяльністю від ідеї до втілення, від самого зародження і обговорення ідеї до будівництва житлових комплексів, вручення ключів до квартири. Продаж здійснюємо на первинному ринку. Нам потрібні креативні, яскраві борди, які будуть запам'ятовуватися для наших потенційних клієнтів, від яких у них буде ефект "ВАУ"! Обов*язково, щоб був логотип нашої компанії, було зрозуміло, що це рекламується житловий комплекс. Ці борди повинні бути спрямовані як для підвищення загальної впізнаваності про наш житловий комплекс, а в ідеалі - щоб підвищити продажі.

Шукаю фрілансера-дизайнера для створення обложок на відео в YouTube каналі

Скопіювати лендінг. Настроїти форми заказів Змінити кольори, додати відео

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Об’єктом автоматизації є електронна записна книжка. Записна книжка дозволяє зберігати коротку текстову інформацію (нотатки) та здійснювати пошук по них. Також, записна книжка може мати кольорові закладки, якими можна помічати нотатки для прискорення пошуку, або дозволяє лишати теги прикріплені до кожного запису. Самі записи також можуть мати назву, яка характеризує їх зміст, що може прискорити перегляд списку всіх збережених нотаток, оскільки при цьому зникає необхідність відкривати кожну з нотаток для ознайомлення зі змістом. В тому випадку, лише назва буде показуватися у загальному переліку, яка будучи лаконічною та значно коротшою за вміст нотатки, швидко дозволить ідентифікувати шуканий запис. Як варіант розширеної функціональності, записи можуть містити прикріплену інформацію фо...

Інтернет магазин з доступною,розширеною андмін панелю

Інтернет магазин з функціональною адмін панелю

Потрібно налаштувати та запустити рекламну кампанію двох груп товарів в інтернет магазині

Написання додатку для Андроїд згідно з технічним завданням. Додаток аналогічний - з можливістю розширення функцій.

I'm in need of an experienced Linux and Server Admin who can help ...installing and configuring various websites - coded in PHP, Node.js, and React - on the server. Additionally, you'll need to install Flutter and React Native apps. The ideal candidate should have advanced understanding and practical experience in Linux system administration, server administration, and web/app installation. Proficiency in PHP, Flutter, and React Native is required. ------------------------------------------------------------------------------------------ Should have experience in linux VPS, setting up sites apps email dns firewall NO CPANEL. All work to be done using command line Sites are in php wordpress Node React Apps are in React Native Flutter Database: Mysql/mongo...

I'm looking to have an iOS app developed that allows users to complete a questi...personalized feedback as a result. Key Features: - The app should only be available on iOS devices. - It should not require users to create an account, enabling them to use it anonymously. - The questionnaire should provide personalized feedback based on the user's responses. Skills and Experience: - Proficient in iOS app development, with a portfolio of completed projects. - Experience in developing apps that handle user data securely and anonymously. - Prior work on applications that generate personalized content or feedback for users would be a plus. I'm open to hearing your suggestions on how to best implement this idea, and I'm looking for an experienced and communicative f...

I am in need of a talented app developer who can design and create a mobile application compatible with both iOS and Android platform...spells back to unused state - Ability to save "battle board" - the final screen of selected skills / spells - to be loaded later or switched with another battle board which was saved. The perfect candidate will have strong experience in mobile app development, with a portfolio displaying similar work. Understanding the dynamics of game tracking would be a great advantage. Experience in creating apps that run smoothly on both iOS and Android would also be beneficial. It’s critical to adhere to best practices for user-friendly design, as the app needs to be easy for players to navigate. Please submit a proposal detailing how you plan ...

Seeking a skilled full-stack developer with excellent knowledge in java, css, and html to create a web app akin to Tinder. I already have a design prepared for implementation. A critical requirement is developing a matching algorithm that pairs users based on shared interests. A vast understanding of similar algorithms and experience in creating web apps is ideal for this project.

I need a small application prototype with the following features: Multi-Employer Job Portal/Admin app (Role Based access) User/applicant App (for Multiple applications to different employers) User Profile Document Upload (Save documents to Db and attachments to Blob Storage ) Send Emails to Employers and applicants back and forth 2 Apps in total ie. admin app and applicant app. job application requirements will be provided. Nodejs, angular, My SQL, ORM, Data Seeding, Migrations should be used.

I'm looking for an experienced app developer who can customize the WoWonder Mobile Apps. Specifically, I need the "Users Nearby" feature to be revamped. Instead of the current functionality, I want users to be displayed in real-time on a map, utilizing Google Maps as the preferred map service. The Wowonder apps information can be found here Key Requirements: - Transform the "Users Nearby" feature into a real-time map display via Google Maps - Integrate user profile previews on the map The ideal candidate would have: - Proficiency in WoWonder Mobile Apps - Extensive experience with Google Maps API - Prior experience with real-time map integration - Strong understanding of

I'm seeking a highly experienced web and app developer to create a top-tier informational website and corresponding Android and IOS applications. Key Functionalities: - The website and applications should be rich in features to provide a seamless browsing experience for the users. - I require a blog section that is easy to navigate and manage. - A robust contact form that seamlessly connects to my email system. - A subscription option for users to stay updated with the latest information. Page Estimation: I anticipate the website to have between 5-10 pages. Ideal Skills and Experience: - Proficiency in website and application development for both Android and IOS platforms. - Strong experience in building informational websites with the required features. - Knowledge of integrat...

...experiencing unauthorized accounts being opened with my information all across various websites most of which I’ve never heard of or visited. Also there’s nonstop access to my existing online accounts and noticing suspicious activity on my devices. While I've taken measures on some accounts to secure them, it's not enough and I need professional intervention. The compromised accounts include apps, social media, GPS and financial. The activity on my devices sparks concern, particularly regarding showing activity in my history I did not do and I'm looking for expert guidance I have already wiped my device multiple times and have even gone as far as establishing all new digital identifiers such as new phone number, email, and Apple ID to no avail....

We want to delelop a cibersecurity software/app to Sell to other companies that can check each computer and device, as also as detect treaths to the company network/devices like e-mails, apps, and suspicious content that puts the company security in Treath.

I'm seeking an experienced app developer to create a business mobile application that's compatible with both iOS and Android platforms. Key Features Required: - Integration with a payment system to facilitate transactions with...that's compatible with both iOS and Android platforms. Key Features Required: - Integration with a payment system to facilitate transactions within the app. Ideal Candidate Skills: - Strong cross-platform development experience (iOS and Android). - Proven track record in integrating payment systems in apps. - Familiar with creating robust, secure financial transaction systems. - Solid understanding of UI/UX for business apps on both platforms. Please include examples of business apps with payment integration you've pr...

I require a dynamic sports betting app that is downloadable from both App Store and Play Store. This app should be endowed with a number of important features: - Live Betting: The app should ...betting scope for the users and make the wagering more exciting. - Colorful and Dynamic UI: I want the UI design of the app to be both colorful and dynamic. An attractive UI design will not only appeal to the users but also make the app look more professional and relevant. Ideal freelancers for this job are those with experience in app development, particularly in the creation of sports betting apps. They should be well-versed in designing dynamic UIs and incorporating features such as live betting and daily predictions. A familiarity with adding cumulative betting features would also be adv...

...entails: - Sleep tracking: To monitor and analyse the user's sleep patterning. - Mental health tracking: A holistic mental health tracker incorporating mood patterns, meditation frequency and daily tasks check-in. Subscription: - A Monthly subscription option is needed, requiring a seamless and secure payment gateway. Ideal candidates should have experience in designing healthcare or wellness apps, with considerable knowledge in integrating tracking functionalities. You should also understand data security measures, as preserving user confidentiality is paramount in this project....

I'm seeking an experienced Android app developer to create a custom app like Lin...developer to create a custom app like Linphone with specific features and design requirements. Requirements: - Voice & Video Calling: The app should allow users to make both voice and video calls. - Custom Design: The app needs a unique, custom design that sets it apart from other similar apps. - Integration: The app should have the capability to call to extensions. Ideal skills and experience for this job include: - Proficiency in Android app development. - Experience with developing communication apps. - Knowledge of integrating calling features with extensions. - Ability to create a visually appealing, custom design. If you have the skills and experience needed, I'm looking...

...experienced Flutter developer to build an Android app for life planning/design. The app should aid users with goal setting, tracking, task management, and capturing personal mission statements, while providing reminders and onboarding journeys. Prospective freelancers should demonstrate: - Proficiency in e.g. Flutter development. Technology can be discussed. - Prior experience with creating mobile apps focused on life design/planning. - Knowledge of task management systems. - Ability to create engaging user onboarding sequences. - Capacity to integrate reminder functionalities. Your work should result in an intuitive, seamless, and user-friendly application that empowers Android users to map out their life goals and track their progress in a systematic way. Demonstrated experi...

I'm looking for an expert developer proficient in creating chat systems that run smoothly on both websites and mobile apps. The chat system should support engagement between up to 10 users simultaneously. To keep things simple and focused, the functionality of this chat system will strictly be text messaging, no file-sharing or video calling required. Ideal skills and experiences include: - Proven track record in developing chat systems - Expertise in cross platform compatibility - Efficient and clean coding practices

...Distribution: The app should have a feature that allows the distribution of awards among users. - User Experience: Ensuring a smooth and intuitive user experience is crucial for this app's success. - User-to-User Exchange: Implementing a user-to-user exchange option is a necessary feature to support B2B sales interactions. Ideal candidates should have: - Prior experience in developing cross-platform apps (iOS and Android). - Strong understanding of B2B sales and the features that facilitate this type of transaction. - Skilled in creating user-friendly interfaces with a focus on user experience. - Knowledge of implementing award distribution systems in applications. - Ability to integrate a user-to-user exchange system effectively. Please share any relevant previous work a...

...User Profiles: Users should be able to create profiles, view their bidding history, and manage their auctions effectively. Key Points: - The primary focus of this app is collectibles. Experience in developing similar niche market apps is a plus. - Please ensure that the UI/UX of the app is user-friendly and engaging, especially during the bidding process. - The app will NOT require an integrated payment system. Users will be directed to external payment methods to complete transactions. Ideal Skills and Experience: - Proficient in developing mobile auction apps for both iOS and Android. - A strong grasp of UI/UX principles. - Experience with collectible-focused applications would be highly beneficial. - Ability to integrate external payment methods seamlessly. If you ar...

...Functionality: - The app is essentially a style and fashion app. It uses AI to help people look their best. - The main functionality of the app is to provide a virtual try-on for clothing, offer color matching suggestions and give personalized style recommendations. Target Audience: - The app is designed for both men and women. Ideal Skill Set: - Previous experience working on fashion or style-related apps is a plus. - Knowledge of AI integration for virtual try-on features is highly desirable. - A keen understanding of color theory and style is important. - Ability to create user-friendly and visually appealing interfaces. - Strong communication skills to understand and interpret user needs. If you have a keen eye for style, a knack for designing user-friendly interfaces and ...

...SOURCING: - Assist in locating "best selling" products that are trending. - Ability to negotiate prices with suppliers, ensuring optimal margins. - Mostly using Zendrop WEBSITE DESIGN & USER EXPERIENCE: - Proficient in Shopify platform, capable of creating a visually appealing and user-friendly store. - Implementing best practices for e-commerce design and user experience (UX). - Ability to integrate apps and plugins to enhance the store's functionality. DIGITAL MARKETING & ADVERTISING: - Proficient in creating and managing digital marketing campaigns including social media, Google Ads, and email marketing. - Experience in running successful online advertising campaigns with a focus on converting leads to sales. SEO & CONTENT MARKETING: - Skilled in ...

...link with 10 users, they can redeem the voucher at half price. - Failure criteria: If the user fails to share the link with 10 users, they will receive a 10% discount on the voucher instead. Some more questions - Can the voucher sharing process be automated or tracked within the app? Ideal Skills and Experience: - Proficient in mobile app development, particularly customization on existing apps. - Strong UI/UX design capabilities to ensure a seamless user experience. - Experience with integrating push notifications and payment gateways. - Familiarity with backend development to implement necessary modifications. If you have a proven track record in app customization and are confident in your ability to deliver these required customizations in a timely and efficient manner, ...

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

I'm in need of a PlayStore expert who can assist me in uploading a casino app on PlayStore. The key features of the app include live dealer games which are a pivotal part of the user experience. Requirements: - Familiarity with PlayStore policies and procedures for gambling apps - Experience with uploading casino apps on PlayStore - Proficiency in integrating live dealer games into an app - Understanding of legal certifications and compliance for gambling apps I would appreciate someone who can guide me through the process of obtaining the necessary legal and compliance certifications for the app. Your expertise in ensuring that the app meets all the relevant legal requirements will be vital.

I'm looking for a skilled Shopify Public App developer to create an app for my business. The app should have the following features: - Cus...Options: The ability to include unique Delivery Date options and configurations on my Shopify store. - Advanced Pickup: a customer chooses a pickup location to pick up her/his order and also uses third-party Google map API for pincode verification for pincode included or excluded for the delivery As a successful freelancer, past work is crucial. Please include examples of previous Shopify Public Apps you've developed or similar projects you have completed. This will give me a better understanding of your expertise in this area. Require Technology -> Node.js -> React.js -> Javascript -> jQuery -> REST API -> MySQL...

As I am looking for an experienced Android app developer, I have a vision for an educational app that...login & Registration: We require a secure user login and registration setup that protects the user's data and ensures only registered users have access to our app. - Requires Map integration and working with object on a map (google maps/mapbox, etc). - Implementation of Modal screens. Ideally, the freelancer should have a robust experience in the development of Android apps. The freelancer should be well-versed in creating apps that offer user-friendly interfaces and seamless navigation. Proficiency in developing secure login systems and detailed product listing features is also crucial for this role. I'm looking forward to seeing your innovative solutions ...

...The app should allow users to browse through our catering services menu. - Order Placement: It should facilitate users in placing orders directly through the app. - Payment Integration: The app must have a secure payment gateway to enable seamless transactions. Ideal candidate would have: - Proven experience in Android app development - Prior experience in developing e-commerce or service based apps - Familiarity with integrating payment gateways into mobile applications - Strong communication skills to ensure a smooth collaboration and understanding of requirements. I have a DJ and catering services business, that I do offline I want to do it online, want a digital presence so for that I will be needing an application This application will be a single platform for all the loc...

I'm looking for a skilled app developer who can create a user-friendly social networking app for both iOS and Android platforms. Key Features: - Messaging: Users should be able to communicate with each other through text, images, and videos. - Photo Sharing: The app should allow users to share photos with their friends and follo...both iOS and Android platforms. Key Features: - Messaging: Users should be able to communicate with each other through text, images, and videos. - Photo Sharing: The app should allow users to share photos with their friends and followers. - Event Planning: Users should be able to create, share, and attend events within the app. I need a developer who has experience working with social networking apps and is able to deliver a well-designed, smooth-r...

I'm looking for a...experience with both platforms. - Purpose: The app's core function revolves around boosting users' productivity. Hence, it's essential that the UI/UX design enables a smooth and efficient user experience. - Design Style: I have a preference for a futuristic design; think sleek, innovative, and cutting-edge. The ideal candidate should have: - Proven experience in developing and designing productivity apps. - Strong portfolio demonstrating a futuristic design style. - Proficiency in both iOS and Android platforms. - Solid understanding of UI/UX principles. Your role will be pivotal in shaping the app's success, so I'm looking for an individual who can bring innovation, creativity, and functionality to the table. If you believe you ...

I'm seeking a Macrodroid expert to handle two key tasks: - Automating the opening and closing of certain apps on my Android device. - Automating specific device settings, such as WiFi and Bluetooth toggling, and screen brightness adjustment. The project has a high priority, so I need someone who can start immediately. The ideal freelancer should be well-versed with Macrodroid, particularly in creating complex automation sequences, and be experienced in Android device settings customization.

I'm looking to develop an Android app using .NET MAUI that focuses on facial detection and tracking for attendance monitoring. Key Requirements: - **Facial Detection:** The app should be able to detect faces in real-time. - highlight detected fac...automatically. - **Attendance Tracking:** The primary goal of the app is to leverage this face recognition technology for attendance tracking purposes.(but no need do any page for this now ) Ideal Skills: - Proficient in .NET and MAUI platform for Android development - Strong experience with facial detection and recognition technologies - Prior work on real-time server communication from mobile apps - Familiarity with attendance tracking systems would be a plus Please provide a brief summary of your experience with similar projec...

I'm looking for a Microsoft Power Platform expert to help me package and publish a comprehensive Powe...references Required Application Information: Freelancers interested in this project should provide a brief description of their relevant experience and knowledge. Ideal Skills and Experience: - Microsoft Power Platform and Dataverse Expertise - C# and .NET Development - Package Deployer Tool Proficiency - Power Apps CLI and Visual Studio Code - Experience with Dynamics 365 SDK - Previous experience in publishing PowerApps solutions on AppSource - Ability to work with canvas apps, component libraries, Power Automate flows, environment variables, and connection references - Strong problem-solving skills - Good understanding of the AppSource platform. Looking forwar...

I'm in need of a skilled mobile app developer to create a ride booking app, with a design theme of 'Modern'. The app will be multi-platform, available on both Andro...reliable GPS tracking to ensure smooth navigation and route optimization for drivers. - Payment Integration: Seamless and secure payment processing is a critical feature for the app. - Rating and Reviews: A feature allowing users to rate and review the service provided by drivers. The ideal freelancer for this project will have: - Proven experience in mobile app development, specifically ride booking apps or similar. - Proficiency in both Android and iOS platforms. - Expertise in GPS integration, payment gateways, and user review systems. - A keen eye for modern design, ensuring the app is user-friendl...

...issues quickly and effectively. - Excellent communication skills and ability to work collaboratively in a remote team environment. **Preferred Qualifications:** - Previous experience working on ride-hailing or real-time communication apps. - Familiarity with CI/CD pipelines for Flutter applications. - Knowledge of advanced Flutter and Dart features. - Experience with other state management solutions in Flutter, such as Provider or Riverpod. **To Apply:** Please send your resume, portfolio, and a brief description of your experience with ride-hailing apps, Bloc state management, and two-way communication systems. Include examples of relevant projects and your specific role in those projects....

...cryptocurrency - Inclusion of secure transactions for premium package purchases Your role in this project will be to design and implement a user-friendly interface that enables seamless navigation and functionality across both iOS and Android. You'll also need to integrate secure and reliable crypto wallet options to facilitate premium package purchases. Prior experience in building crypto-based apps and a solid understanding of cryptocurrency wallets will be a significant advantage. Ideal Skills and Experience: - Cross-platform app development (iOS, Android) - Crypto mining app development - Familiarity with cryptocurrency wallets and transactions - Previous experience in integrating payment gateways - Strong UI/UX design skills - Security-conscious mindset to ensure user...

I am looking for a Social Media expe...with a strong focus on Facebook, who can create engaging content for my page that encourages high-profile public interactions. Your tasks will include: * Creating innovative and attention-grabbing user engagement posts designed to incentivize public interactions, fostering a lively on-page community. Skills & Experience Required: * Expert knowledge of Facebook's algorithms, user behaviors, and viral content strategies. * Proven experience in creating engaging posts for diverse audiences. * Exceptional communication and interaction skills. * Successful track-record of fostering high-profile public engagements. This role would suit an experienced Facebook user who is passionate about fostering online communities and facilitating enga...