Firebase data synchronization issue

We will go through each point. Technical task for the development of a mobile application for a sushi delivery service A mobile application (Android and iOS) needs to be developed with functionality as close as possible to the website 911sushi.com.Main requirementsIntegration Full integration with Poster POS. All orders must automatically go directly to Poster. Use of the existing customer base in Poster. Automatic application of personal discounts for guests already set up in Poster.User authorization Registration and authorization. Login by phone number (or another modern method of authorization). Saving order history. Personal discounts and promotions for the user.Menu Viewing categories and products. Detailed information about items. Ability to add products to the cart. Selection of modifiers and add-ons (if needed).Cart and order placement Selecting a delivery address. Saving multiple user addresses. Selecting a city. Selecting delivery time or "as soon as possible". Displaying delivery costs depending on the zone. Support for delivery zones with the ability to edit them.Admin panel A convenient admin panel is required with the ability to: Edit the menu; Add and remove items; Change prices; Change categories; Manage promotions; Create and send promo codes; Set limits on the use of promo codes; View statistics.Promotions and marketing Provide the possibility of: A promo code for the first order; A bonus or discount for installing the app; Creating promo codes with a limited number of uses; Mass mailing of promo codes to users; Conducting promotions without the need to update the app.Analytics Detailed statistics are needed: Overall app performance statistics; Statistics for each menu item; User conversion; Number of installations; Number of completed orders; Average check; Repeat purchases; Delivery analytics by addresses; Selection of the 100 most popular delivery streets; Other key performance indicators for sales analysis.Information sections The app must include: Links to social networks; Contacts; A map with the location of the establishment; Information about the company; Delivery and payment conditions.Application performance requirements Fast and stable operation; No freezes or critical errors; Modern and user-friendly interface; Support for current versions of Android and iOS.Design There is currently no separate design. The existing website 911sushi.com can be used as a basis. All necessary materials have already been prepared: Logos; Brand colors; Menu; Brand book (if available).Phased implementation I consider phased development:Phase 1 Basic functionality; Integration with Poster; Menu; Cart; Order placement; Authorization; User account.Phase 2 Promo codes; Promotion system; Analytics; Statistics; Additional marketing tools; Other functions that may arise during the project development.Additional conditions After the development is completed, a 30-day testing period must be provided, during which possible defects will be corrected. After successful testing - final payment. It is important that the contractor is ready for gradual expansion of functionality, as new tasks may arise during the work process. Priority - the shortest possible implementation time without loss of quality. It is preferable that the contractor is from Lutsk, but this is not a mandatory condition.Please indicate in your response to the application: Estimated implementation time; Cost; Technology stack; Examples of similar projects; Experience with Poster POS integration; Whether you are ready to work in phases; Whether you provide warranty support after launch.

Project Description I am looking for an experienced Android app developer who can help prepare and publish my app on Google Play. A specialist who is well-versed in the requirements of Google Play Console, the publishing process, and possible methods of releasing apps, including working with old Google Play Console accounts (if allowed according to Google's rules), is necessary. Requirements: Preparation of the app for publication. Verification of compliance with Google Play requirements. Assistance with setting up Google Play Console. Creation of the release and publication of the app. Consultation on resolving possible errors and rejections during moderation. Experience in successfully publishing Android apps. If you have verified experience in publishing apps on Google Play and can help complete the task quickly and efficiently, I would be happy to collaborate.

Goal: to create an APK for Android or Firestick, install it on the TV, and launch videos from a computer so that the same videos are displayed on all TVs. It will be used for clinics to play specific videos on the TVs. Also, there should be playlists so that each specific TV shows only the selected playlist. The program should download videos to the device instead of streaming them, thus saving internet and resources. When the Playlist is updated, the program will update and show new videos.

We are looking for an experienced freelancer (mobile app developer). We need to create and prepare apps for upload in the iGaming niche. These apps are developed for a specific task — launching advertising campaigns through Google UAC (Universal App Campaigns). Therefore, it is critically important that the apps are technically optimized for Google Ads algorithms. Please specify the price and deadlines.

Good day. In order to publish the app on Google Play, 20 testers are needed to test it. You must install the app, click around a bit, and not delete it for 14-15 days. Tester task: download the app to your smartphone, open it a few times, press buttons, check tabs, and DO NOT DELETE THE APP FOR 14 DAYS! If you or your team are ready to test, please write. Update #1 from 07.05.2026 20 testers are needed for testing a game on Google Play. Google Play requirement. The game cannot be deleted for 20 days; otherwise, everything will reset and you will have to start over. If you have a team with 20 devices, send your proposals. Tester task: download the app to your smartphone, open it a couple of times, press buttons, check tabs, and DO NOT DELETE THE APP FOR 14 DAYS!