Position: Senior Android Developer
Category: Android
English level: upper
Years of experience: 5

Server-side application using Java to track vital condition of ukrainian soliders using arm-tracker. A tracker was like a simple fitness-tracker, it is wearing on arm and sends data using Lora Network on a physical device which is connected to the Java server. Java server reads data from all of trackers and make some statistics and analytics. Tracker was developed from scratch by our team of engineers.
Twill Care, Twill Therapeutics, Happify by Twill - highload applications, have a lot of connectivities, threads, modules and libraries. Developed from one old-codebase project using flavours and modules.

Some outsource projects: 
   Social Network very similar to Telegram. Have p2p chats, Groups and Channels, also such message types - text, audio, video, planned, location and tracking location messages. Implements AdMob and Facebook Audience Network for internal ads. A lot of analytics are also included.
   Financial App. Aplication wich allows to get real-time information about companies market and shows a "Predictions" about possible future "direction". Application have a functionality to subscribe to the company and notify about any changes, what causes using a lot of notifcations. It also about huge variety of charts and vector animations. Non-free application with a subscription on the Web-site.
   Dating app - just another clone of Tinder, match a person, chat with him, send paid stickers and gifts, block or report any user. Application also implements Google In-App Purchases library which used for "Vip" subscription.

A lot of one-day projects such as Minecraft Mods, Roblox Skins, Whatsapp Stickers. In most of them used Firebase storage, realtime database, firestore and auth. Huge experience with Google In-app Purchases, AdMob, Facebook sdk