Mobile applications development (mostly native iOS, also had experience with React Native).
Native mobile applications development (active development for iOS, support for Android).
Worked on set of applications to learn foreign languages (for our main customer — Transparent Language), consulting on outsourcing tasks for different customers.
Worked on core architecture, networking and data storage layers, including significant amount of client-server synchronization tasks.
Actively interacted with backend development team and product owners.
Replaced the team lead when required.