Position: .NET Back-end developer
Category: .NET
English level: upper
Years of experience: 2.5

Participating in IBM Master the Mainframe contest -- well, I've proven to myself that if the work with mainframes is required I'll manage to deal with it. 

Integrating RabbitMQ -- I remember that shock when I've been told to do that. I remember that double-shock when I've been told to ensure our integration's ok dealing with many thousands of customers simultaneously

Integrating Payment Gateway -- I've gained strong communication skills to get all the necessary information from the responsible people to finish the integration :D
SQL, C#, RabbitMQ, Algorithms, SOLID
Back-end development (having been a full-stack developer is the dark page of my story -- creating and supporting front-end is definitely not my favourite activity)