Firebase tableview swift trabalhos

I'm seeking an adept app developer with significant experience in constructing online shopping applications for both iOS and Android platforms. Key Responsibilities: - Develop a user-friendly e-commerce app compatible with both iOS and Android devices, - The app should support ful...- The app should support full online shopping functionalities, including product browsing, shopping cart, secure payment options, and order tracking. - Ensure the app is designed with a focus on usability and seamless user experience. Ideal Skills: - Proven experience in e-commerce app development, - Proficiency with cross-platform development, - Proficient with programming languages such as Swift, Java, or Kotlin, - Understands principles of secure app development, - Knowledge of mobile UI/UX ...

I am looking for an experienced software engineer who can facilitate the integration of Google Assistant and Alexa with my Firebase Realtime Database. Our primary objective is to enhance the real-time synchronization of data. Specifically, I am hoping to achieve the following: - Utilize the real-time data syncing feature of Google Assistant and Alexa to streamline the user interaction data of my IoT devices. - Ensure stability, responsiveness, and quick syncing time throughout the entire user active time. You're the ideal person for this project if: - You have extensive experience working with Firebase's real-time database, Google Assistant, Alexa, and IoT devices. - You possess a deep understanding of user interaction data management, particularly within IoT devices...

...charging sessions: The users should be able to initiate, pause, and end charging sessions from their mobile devices. • Billing and payment integration: The app needs to integrate a secure, straightforward method for users to pay for their charging services. As for the technology stack, I am open to whichever you believe would best serve the project's needs, whether that's Flutter, React Native, Swift, Kotlin, or another option entirely. The essential factor is that you can deliver the named functionalities with the proposed technology. Ideal skills and experiences for this project would include mobile app development, experience with real-time monitoring systems, payment gateway integration and familiarity with EV charging infrastructure. Confidence in your choic...

For this first iteration, the following elements and functionalities extracted from the requirements document provided are considered. Basic UI: - Auth workflow Final UI design: - Main screen - Detailed post view - Viral screen Functionalities - Basic auth workflow (email/password firebase auth sign up/login) - Post, like and comment - Others Functionalities associated with Main screen, Viral screen and Auth workflow.

I am in need of a creative and artistic logo designer who can translate my brand's philosophy into a visual entity. Key aspects to communicate through our logo are professionalism, trustworthiness, and modernity. The perfect candidate for this project will have: - A strong portfolio of innovative and original logo design - A keen color sense to select color(s) suitable and effective for my brand - Demonstrated skill in crafting simple yet powerful images - Proficiency in modern design software Please note, no specific symbols or icons have been predetermined for this design. Feel free to unleash your full creativity. Your past experience in creating logos for property management firms or similar industries will be highly appreciated. Great attention to detail and a strong understand...

- I am in immediate need of a skilled Client Acquisition Specialist with experience in the Real Estate sector. - Unspecified target market indicates the need for a versatile approach. Whether the target is residential buyers, commercial buyers or real estate investors, you should be flexible and skilled in addressing all segments. - Since the proj...I am looking for someone who can hit the ground running. A proven track record in high-pressure environments will set your application apart. - The perfect candidate should possess in-depth knowledge of target markets within Real Estate, along with a proven background of successfully acquiring new clients. Excellent communication skills and a results-driven approach are paramount. Let's make a swift impact together on this time-sen...

I want a webview application that must be written in Swift and Xcode.

I want a webview application that must be written in Swift and Xcode.

Application Name: ForPrompt Mobile Software Download Links: iOS: Android: General Overview of the Application: The ForPrompt Mobile application is primarily software designed to assist users in tracking speech texts or presentations in an organized and readable manner. Through Bluetooth connectivity, users can control the scrolling direction and speed of the text. These applications are commonly used by YouTubers, news presenters, social media content creators, hosts, speakers, and other media professionals. Features to be Added: 1-Simultaneous Text Scrolling: The software is controlled via Bluetooth (BLE) remote. The BLE remote can connect to and send data simultaneously to multiple tablets/phones. The desired feature is to be able to simultaneously scroll the same text on four differ...

I am on the hunt for a talented Swift and Objective-C developer experienced in creating engaging, secure, and high-performing MacOS and iOS applications. The successful candidate will be responsible for: I have the source code to build iOS and MacOS apps. He adds new features to the project. This project is long-term. I will give more detail in the chat.

...a database and payment processing as a function of a backend server along with security and authentication concerns. • Data Retrieval - The developer will establish gateways that allow swift and secure extraction of data. • Data Storage - Developing a reliable system for storing and organizing received data, following best practices for data security and integrity. • Data Manipulation - Advanced data handling capabilities, manipulating data according to business logic, and effectively communicating results. Understanding of backend BaaS and MBaaS strategies along with JSON, JavaScript, BACK4APP, Firebase or maybe Amazon Lightsail would be advantageous, although this is not a strict requirement, as the question related to the programming language is flexibl...

I am currently facing challenges with my WordPress website, specifically with my customers' ability to add products to their cart after making a size selection. This problem seems to have surfaced after I hosted my site. This could indicate some form of compatibility issue yet to be diagnosed. The problem lies within either t...yet to be diagnosed. The problem lies within either theme customization, plugin compatibility, or even from a slow loading speed. Ideal Bid Requirement: • In-depth experience with WordPress, including theme customization and plugin compatibility. • Proven track record in diagnosing and resolving similar issues. • Understanding of web hosting and its possible effects on site's functionality. • Swift resolution to avoid extende...

I need a video player software that integrates a unique functionality - mouse-controlled video play. The software must have advanced customizable playback controls specifically designed for swift forward/backward video navigation. Key features: Play forward if mouse is hovering right and play backwards when mouse is hovering left Skills and Experience Required: - Proficiency in software development - Experience with video player software - Understanding of video playback controls and their customization

I urgently require a meticulous website editor who can do a swift, yet thorough update of the content on my existing website. Mainly, you will be tasked with: * Updating the website's existing content * Adding, designing, and formatting new sections. Despite having chosen not to disclose the specific sections to add, I am open to discussing what will work best in priority of a user-friendly and appealing layout. Being proficient in theme customization will be a great advantage, as some design tweaks may be needed on the go to accommodate the new changes seamlessly. Ideally, I am looking for someone with great attention to detail, top-notch graphic design skills, and a strong coding background. Time is of the essence, as I need this project completed ASAP. So, you shoul...

I am looking for a meticulous professional who can help me with data entry. The task mostly revolves around entering personal data that will primarily be utilized by our employees. Key competencies and tasks include: - Accurate and swift data entry capabilities. - Maintaining the confidentiality of the data as it's personally sensitive. - Previous experience in dealing with personal data entry tasks. The ideal freelancer for this task would have previous experience in data entry, especially dealing with personal information, and outstanding attention to detail. An understanding of privacy policies and data handling procedures will also be highly beneficial.

I am in need of a uniquely designed, 2D animated logo to be used at the tail end of promotional videos and social media content. Primary focus should be on inclusion of company name and a symbolic element. - Animation Style: I'm specifically interested in 2D animation, so experience in this style is necessary. Ability to make smooth, engaging animations would be ideal. - Elements: The logo must include our company name and selected symbol. Merging these elements creatively will be appreciated. - Deadline: The project has to be completed as soon as possible. Quick, yet thorough work will be highly appreciated. Ideal candidates should have: - Strong experience in 2D animation - A creative mind for integrating key elements into a logo - Reliable in meeting urgent deadlines I’d...

As part of this project I require the development of a robust, dynamic TSP-based heuristic. The critical objectives of this undertaking include: - Development of real-time optimization capabilities - Incorporating smart route planning - Adaptation to swift changes in fire patterns Applicants should possess a strong understanding of algorithm development and real-time data processing. Experience in disaster management software development will be a significant plus. The successful implementation should also be able to brave tests on both, generated datasets and literature datasets. Therefore, the ideal candidate should have sufficient skills in modeling and simulating dynamic environmental scenarios. Combining this with real-time fire dynamics data will be integral to the testing p...

I'm in need of a proficient developer to structure a custom email action handler tailored specifically to my Firebase email link template on project. Here are the particulars for this project: - I want to create a custom email action handler to and trigger the login email with the firebase link for login. email template is already ready and firebase is already integrated, we just want to customize the firebase login email design

Hi I've created a very simple family-friendly iOS app called using SwiftUI. The app offers text instructions for simple, engaging party games suitable for all ages, like Charades. The app contains 50+ games for free, and users can add another 80 games through an in-app purchase. See the video! It's pretty much complete! I have all the views, animations, content, design build, and even a basic implementation of in-app purchasing. Your Role: In-App Purchasing Integration: The main task is to complete the in-app purchasing so it is ready for the app-store. I have already done the basic StoreView (StoreKit 2) for the game pack (see video), but have not handled the different purchasing states the purchases/refunds/restored purchases/deferred/canceled/failed etc. I need someone wi...

I'm looking for a seasoned app developer to create a robust e-commerce app for both iOS and Android platforms using flutter and firebase, An integral feature of this app will be user authentication, ensuring maximum security for users' personal and financial data. The app should also allow seamless purchases, incorporating third-party payment gateway integration. Familiarity with creating secure authentication systems and prior experience in e-commerce app development will be important for this role. Great understanding of range of third-party payment services is a plus.

I'm in need of an SwiftUI developer to help create an iOS application for iPhones. The primary function for this app will be to connect to an MQTT Broker and be able to subscribe and publish to topics. The user flow (please see atta...real time. Five main features I'm looking to have implemented into this app are: - SwiftUI UI Design (in Xcode) - iOS Compatibility - MQTT Connectivity - Real-time Data Streaming - Text-based Data Display The successful freelancer will have the following skills and experience: - Proficient in Swift and SwiftUI - Experience with MQTT protocol The UI does not have to be polished. The main objective is to be able to subscribe/publish to a topic on an MQTT broker. If you have experience in Swift/MQTT, I'd like to hear from yo...

...priority, suggestions for tweaking other aspects, like video streaming speed or loading time for static elements, are welcome. This is aimed to provide a holistic improvement in the server's performance. Experience required includes strong command on CentOS 7, Nginx, Apache, and PHP7.4. Professionals who also have a background in video streaming platform optimization will have an edge. A smooth, swift, and efficient user experience is the ultimate goal....

I need an expert in photoshop to make some changes to a picture I have. The skills required include: - Image editing - Familiarity with eye anatomy The main task is to correct the cross-eyed appearance of a subject in an image. Specifically, this involves adjusting the position of the pupil. It's only a slight reposition to the center that's needed, so ...eye anatomy The main task is to correct the cross-eyed appearance of a subject in an image. Specifically, this involves adjusting the position of the pupil. It's only a slight reposition to the center that's needed, so this job shouldn't be too time-consuming or complex for someone with the right skills. Please apply if you have previously done similar work and have a keen eye for detail. A swift tu...

I need a proficient developer to integrate a Firebase database into my Android Studio app. Key tasks to be completed include: - Setting up a Firebase database - Implementing user registration and login functionality

I'm seeking a knowledgeable and experienced web developer for an upcoming project. Though I have not specified a preferred technology stack, the chosen freelancer should be able to advise on and implement the best choice for our goals. Key ...preferred technology stack, the chosen freelancer should be able to advise on and implement the best choice for our goals. Key aspects to consider: - The ability to communicate effectively about the various technology stacks and their respective benefits. - Expertise in various web development platforms and coding languages. - No strict deadline, so quality and thoroughness are prioritized over swift completion. Experience in both frontend and backend development would be a bonus. Let's develop a functional and visually appeali...

...environment, designed specifically for a small cohort of less than 10 learners. The prime features to be incorporated include: - Video Conferencing: This will permit face-to-face interaction, facilitating a more personal connection. - Screen Sharing: Enabling the instructor or students to share their screen for presentation and demonstrations. - Chat Messaging: An avenue for text messaging to enable swift communication and handling minor clarifications without interrupting lectures. - Collaborative Learning Tools: Particular importance is given to tools that support group tasks, peer feedback and cooperative learning experiences. Ideal candidates would have experience developing similar virtual learning systems or tools and a solid understanding of the most current online l...

I'm in need of a creative, innovative and technically astute app developer with extensive experience in face recognition technology and user-interactive interfaces. Essential skills include Python, Java and Swift. The app needs to be built for both iOS and Android platforms. The primary purpose of this project is to transform standard photos by detecting faces and adding a talk bubble. This talk bubble should be editable, with text added by the user. The app must have an interface for the upload of images by users, as well as the capability to source images from the device’s camera and the internet. Your responsibilities will include: - App development for both iOS and Android. - Implementation of face parsing technology. - Ensuring user editable text in ...

I'm seeking a versatile iOS app developer to not only revamp the user interface of my mobile app but also optimize its performance and incorporate new features. Key deliverables will include: 1. User Interface Redesign: Bring a fresh, interactive, and user-friendly feel to the app's interface. 2. Performance Optimization: Ensure smooth and swift app operations, minimizing glitches, lags, or crashes. 3. New features: Integrate in-app messaging and push notifications, improving user communication and engagement. The ideal candidate should have robust skills and experience in iOS app development, interface redesign, and seamless integration of new features. Understanding of in-app messaging and push notification systems will be a plus.

I am looking for a proficient mobile app developer for a swift development of an application that is compatible with both Android and IOS platforms. Here's what I am looking for: - Mobile App Development: Building a mobile application that can function seamlessly on both IOS and Android. - Splash screen on start up of application. - User Login System: The application should have a user login system to provide personalized user experience. User Login/Teacher Login/School Login. All 3 have different roles and access to specific pages/information. - Real-Time Updates: The app needs to support real-time updates to ensure the content is up-to-date and current. App will need to be able to save information in local and cloud with sync. - Multiple Screens: The app will have variou...

I need a highly skilled immigration lawyer to challenge a visa denial I received from the German Consulate. They have expressed doubts about the plausibility of my intentions and the lack of satisfactory answers during the interview concerns regarding the authenticity of my motivation for the intended study in Germany Here's what the situation entails: - Swift appeal compilation. This is a time-sensitive issue and needs to be dealt with ASAP. - Complete understanding of my situation and the ability to keenly articulate it to convince the authorities. Required expertise: - Familiarity with German visa laws and processes. - Language Skills: Fluency in German and English is required for effective communication. - Excellent legal drafting and negotiation skills. - Proven track r...

...messaging and push notifications. The improvements will be influenced by: • Replacing the current chat server with a Signal Server. This step is crucial in achieving an improved real-time messaging feature for the users which will greatly enhance their interaction on the app. • Integrating Firebase for enriched push notifications. This will aid in sending timely, relevant notifications that will keep the users updated and engaged. The ideal candidate will have proven experience with both Signal Server and Firebase, coupled with a strong background in iOS development and Android App Development. An understanding of UI improvements is also desirable as the user interface will need to be adjusted to make these new features blend seamlessly with the existing desig...

I'm in need of an exceptional scriptwriter who can effectively articulate our ideas in concise, engaging words. Our content revolves around educational videos, productivity, and deciphering the mindset of students along with the hurdles they face, such as self-sabotage. Here's wh...areas of productivity and education - Ability to deliver content that is educational, engaging, and compelling - Strong understanding of student psychology and challenges they face in their learning journey - Deadline & detail oriented Our main script focus will be on productivity, although we won't be diving into a specific topic just yet. Although we haven't specified a timeline, we value swift, quality work. If you're the one who can transform our ideas into powerful w...

I am in urgent need of a creative freelancer to design both a unique logo and an engaging banner for my application. The primary role of these designs is to establish an appealing brand identity, make a statement in advertising, and promote an active social media presence. The design must be compelling enough to help the brand stand out from the competition. Spot-on skills and experience needed includes: - Expertise in graphics design, specifically logo and banner design - Proven portfolio of creative design work - Excellent understanding of branding and strong proficiency in advertisement design - Ability to deliver the project as soon as possible Please note that the application name has been decided but will be disclosed to the successful freelancer. Your creative suggestions will be ...

I am in urgent need of a creative freelancer to design both a unique logo and an engaging banner for my application. The primary role of these designs is to establish an appealing brand identity, make a statement in advertising, and promote an active social media presence. The design must be compelling enough to help the brand stand out from the competition. Spot-on skills and experience needed includes: - Expertise in graphics design, specifically logo and banner design - Proven portfolio of creative design work - Excellent understanding of branding and strong proficiency in advertisement design - Ability to deliver the project as soon as possible Please note that the application name has been decided but will be disclosed to the successful freelancer. Your creative suggestions will be ...

I am currently working on a Laravel project and I am experiencing an issue that I am unable to resolve. My project involves using websockets, but I cannot establish a connection. I am repeatedly coming up against an error message that seems to relate to SSL Certificate. - SKILLS AND EXPERIENCE: The ideal freelancer for this project would have: - Deep understanding of La...Certificate connections issues - REQUIREMENTS: The chosen freelancer will be expected to: - Debug the current problem in the websocket connection - Explain the reason behind the SSL Certificate error - Provide a robust solution to ensure smooth and efficient websocket connections in future I can provide the specific error messages to the successful bidder to aid in diagnosing the problem. Swift turnaround...

I'm looking for a skilled UI/UX designer to create a sleek, user-friendly interface for a Task App to be available on both iOS and Android platforms. Key Requirements: - Mastery in creating a dynamic layout. - Experienced in integrating interactive elements into a user interface. - Proficient with Java for Android and Swift for iOS. - Previous work on productivity apps would be a plus. The aim is to make an app that is visually striking, intuitive and aids users in efficiently organising their tasks. Your creativity in injecting fresh and innovative design ideas will be highly appreciated.

I require a proficient web developer to create an infor... As a ready-to-go project, I offer: • All necessary content: All content needed for the site development is ready and will be supplied to facilitate swift project completion. • Focused audience reach: The site should resonate with industry professionals, reflecting their needs, language, and interests. The ideal freelancer should have: • Proven experience in web development, particularly in crafting informational websites. • Understanding of appropriate designs and layouts for sites targeting professional audiences. • Speedy and efficient delivery due to the readiness of all needed content. In all, I seek compelling web design, swift execution, and an intuitive user experience to engage...

...deep understanding of how to create seamless and efficient user journeys. • Visual Design and Branding Update In addition, the project involves updating the color scheme and typography of the app. It’s also crucial to establish a consistent, cohesive visual style throughout the app. This demands creativity and excellent aesthetic judgement, as well as a good grasp of brand identity development. Swift, remarkable experience in UI/UX design, user interaction design, and app branding is desired for this project. Preference will be given to those who can demonstrate a strong portfolio of similar prior work....

I'm in need of some IT help. I am currently utilizing Gmail as my email provider, but I would like to forward all emails to Outlook. Unfortunately, I'm having some trouble with the configuration of IMAP/POP settings. It seems like a straightforward process, yet I'm not able to figure out the correct settings. The assistance is required...task. I believe someone with a solid background in IT support or similar, particularly with a focus on email configuration, would be able to lend the help I need quickly and effectively. Tasks include: - Correct configuration of IMAP/POP settings - Successfully linking Gmail and Outlook emails A thorough understanding of both Gmail and Outlook platforms would be beneficial for this task. Your swift assistance with this matter wil...

Previously signed NDA still applies New project: Preparing the app for production. 1. We recreate a firebase account for you 2. You recreate the styling to exactly what it was before 3. We test the app, and you fix any sort of issues/crashes that occur

...processing for bookings. - User review system: A feature that allows users to rate and review services within the app. Proven experience in mobile app development integrating features mentioned is a must. An effective developer for this task should demonstrate proficiency in Android and iOS development, payment gateway integration, user interface design, and user experience design. Familiarity with Firebase, and knowledge of latest mobile app trends is a plus. Your commitment to cross-functional collaboration, user satisfaction, and responsive design will be vital in bringing this app to life. Similar to UBER rides but locally, around for specific ride types with private and sharing option...

I am struggling with a swatch image display issue on my e-commerce website. Despite having uploaded all the swatch images for each color, the swatches are not visible, only the names of the colours show up. There's a chance that these images...Expertise in handling WooCommerce plugins, particularly YITH and Variation Swatches. - Proficiency in troubleshooting and resolving e-commerce website issues. - Experience in managing and optimizing website display options. - Ensuring correct assignment of swatch images to each colour variation. - Verifying if the issue was due to incorrect assignment, and rectifying if needed. In short, I need a swift and proficient fix to this issue which is impacting the user experience on my e-commerce platform. Please only contact if you can do the...

...**Maintenance and Updates:** - Provide ongoing maintenance post-launch to fix any emerging issues. - Periodically update the app for performance improvements and new features. #### **Technical Skills and Qualifications:** - Extensive experience in mobile app development, with a strong portfolio in marketplace or e-commerce apps. - Proficiency in programming languages and frameworks such as Swift (iOS), Kotlin/Java (Android), and Flutter or React Native (for cross-platform development). - Experience with UI/UX design, focusing on mobile platforms. - Knowledge in integrating third-party APIs, payment gateways, and delivery systems. - Strong understanding of database management and cloud services. - Excellent problem-solving abilities, attention to detail, and project manage...

...Comprehensive account management functionalities. Invoice generation and real-time balance tracking for user convenience. Integration with external APIs to enable seamless send and receive functionalities. 1.2. Interconnected Module: Exclusive e-banking module for fiat currencies. Ability for merchants to hold funds in various fiat currencies. Support for internal and external transfers via SEPA or SWIFT methods. 1.3. Customizable Fee Structure: Support for a flexible and customizable fee structure. Options for monthly, yearly, or transaction-based fees to cater to diverse user needs. 1.4. Transaction Approval and Decline: Manual approval, decline, and refund capabilities for transactions. Enhanced control and oversight for seamless user experience. *along with software we ne...

I'm looking for a finance expert to develop a robust trading strategy for the Forex market. This strategy should cater to advanced traders and the design should ideally be based on the principles of day trading. Key requirements: - Deep understanding of Forex market intricacies - Experience in day trading - Proficiency in crafting strategies for advan...should cater to advanced traders and the design should ideally be based on the principles of day trading. Key requirements: - Deep understanding of Forex market intricacies - Experience in day trading - Proficiency in crafting strategies for advanced level traders. The optimal candidate should be able to provide clear instructions for the strategy implementation, enabling traders to make swift, intelligent decisions ...

As an organization dealing with a large scale construction project, requiring numerous technical documents, I'm urgently in need of a mid-level document controller with expertise in Aconex software. Key responsibilities entail: - Consolidating and managing all technical documents ensuring their accessibility and swift retrieval - Implementing procedures around document management to maximize efficiency - Assuring accuracy, quality, and consistency in document recordkeeping The ideal candidate should possess: - A strong understanding and excellent skills in using Aconex software - Demonstrable mid-level experience in document control - A background in handling technical documents This role demands a meticulous person with an organized mindset and excellent file organizatio...

...an expert mobile developer with proficiency in Firebase and secure messaging platforms. The project involves replacing the existing chat server - with a new one provided at With the selected candidate, we'll: - Integrate Firebase Cloud Messaging: The new server should have the capability to send notifications via Firebase, and this feature should be available on both iOS and Android versions of the application. - Enhance Chat Server Functionality: For the Android and iOS version of the application, the new chat server should enable encrypted secure messaging. This is a crucial requirement for the project. To be successful, you'll ideally have experience working with Firebase, chat servers, and encryption. Understanding of

I require an expert freelancer who can deliver quick and accurate conversion of approximately 200 image files primarily composed of text to Word and PDF formats. Key Responsibilities: - Convert image files to Word and PDF - Maintain one file per image - Ensure converted files preserve the original image's text style Ideal Skills and Experience: - Excellent command of English for text recognition - Proficient in the use of Microsoft Office, particularly Word, and Adobe Acrobat - Previous experience in similar projects - Ability to deliver high-quality work efficiently and swiftly - Keen attention to detail to accurately maintain the original style in the converted files. Your ability to rapidly and accurately perform these conversions while maintaining the style of the originals i...

I am looking for an experienced cloud developer to assist me with the end stages of my mobile app launch. The person interested should have extensive knowledge about Firebase console as well as a comprehensive understanding of the process for releasing apps on both, the Google Play Console and Apple App Store. Key Responsibilities: - Setting up Firebase Console - Configuring the app release on Google Play Store - Configuring the app release on Apple App Store Desired Skills: - in-depth knowledge of Firebase Console setup - proven experience in configuring apps for release on Google Play Store - proven experience in configuring apps for release on Apple App Store Please note that I already have developer accounts set up for both the Play Store and App Store. Th...

I am looking to enhance the login functionality in my Laravel project by enabling mobile OTP login for Android users. The chosen candidate should have considerable experience in implementing similar features and competency in Laravel framework using firebase. • Mobile Platform: This feature should be exclusively designed for Android devices. • OTP Delivery Method: The OTP should be sent to users through push notifications. Experience with integrating push notification services will be crucial for this project. • OTP Specifications: The OTP should consist strictly of numeric characters. Your understanding of creating secure, difficult-to-guess OTPs will be beneficial for the job. This particular development task demands a freelancer who is knowledgeable in Android ...