Worked on adaptation of company's flagship app for Flutter (re-creating app from native to cross-platform) and helped build apps for customers (architecture consulting, Code Reviews).

Main challenges:
* transfered logic from native app to cross-platform app;
* developed logic handling between Flutter and native sides (notifications and background services);
* created tools for working with Developer Experience (like project structure/bugs in configurations checker);
* mentored trainee and Junior developers (One-to-one talks, experience sharing).

Used technologies:
* Mobile apps: Flutter, Dart, Java, Kotlin, Groovy;
* Cross-platform apps: Dart, Flutter;
* Scripts: Dart, Ruby;
* CI/CD: Jenkins (self-hosted).

Worked with a wide range of apps from company's apps (mostly for children/families) to solutions for customers (E-Commerce).

Main challenges:
* created client-server solution for synchronizing data between multiple devices and users of one app;
* developed data visualization layer for showing large amount of user activities on charts and diagrams;
* developed configurable main page of few company's apps (with widgets support);
* created custom fast Calendar visualization for showing events for day/week/month (custom Android views);
* configured Jenkins integration with Gitea.

Used technologies:
* Mobile apps: Java, Kotlin, Groovy;
* Client-server projects: JavaScript, NodeJS, Parse;
* Scripts: Ruby;
* CI/CD: Jenkins (self-hosted).

Fixed bugs and added small features to the company's apps.