Comrade Oleksander and Sergei

I was with Oleksander when we met Katrin during the onboarding. Looking in retrospect, my onboarding friends could be clustered in 3 main language groups although the friendship circles were not defined by that criteria. Mauricio, a Brazilian guy orbited close to the gravity center of many groups. Speaking his language or not was absolutely unimportant for him. In the same line but opposite direction, Mikhail, Oleksander and Tetiana almost didn't talk with each other. Maybe the common denominator among those guys would be two prime factors: me and the language.
Somehow, I and Oleksander were together in a bunch of occasions. I believe the chance was the main factor that grouped me with a conceited young smart guy, 2x years old physics phD and not my affinity with Russian speakers. Anyway, we would talk with data scientist teams on which Katrin worked. The charming smiles of Katrin called our attention. After talking with Katrin first time, he looked at me laughing. I was laughing back, thinking about: "Come on, Oleksander. I didn't say anything. Why are you laughing on my face? I was so placid during the whole conversation". In conclusion, Katrin agreed to met us on Neu Bahnhof building. Oleksander scheduled the meeting and called me next day.

Katrin saw me and hugged me and then she hesitated but hugged Oleksander saying: "I know how to greet Brazilians but I didn't know how to greet you". _ I just follow the Brazilian. _ replied him. In short moment we were divided. I would talk with Tomorrow team and he with Midas. Since that moment, we talk less and less. But the balance of Russians which I interact everyday would not change that fast. Because that was the occasion where I met Sergei.

Sergey was doing whatever Sergey does on his normal working day, with two monitors with tons of opened windows including one for movie and other for IDE and some for browsing. He was using a headset and Katrin asked him to talk with me. He ignored. He understood the message but gravely ignored Katrin. She poked him again and shot him with her eyes... I was almost reading her thought "Now!". Sergei was taken abruptly and awe, but in few moments I was talking with him, Johannes and Katia.

He is one of the grumpiest friends that I have. He is from time to time pessimistic and I... I live in my optimistic dream that bursts from time to time. My first impression was not that wrong although I would add loyal and reliable for his main adjectives later on. There are tons of good phrases that came from his sarcastic mind. Let me put here on of them. We are discussing about my code:
_ I found something here that breaks your code.
_ I have checked before. They are not using things that way.
_ The code will break...
_ It would not ...
_ ... it will and because you didn't find yet the place it  breaks it will break  in the worst moment. Friday... Afternoon... On the day that you would finally meet again the Russian girl.
_ Ok. You convinced me.