Good working material (e.g. Linux RHEL), good spatial logistics (all employees of the corresponding project in two adjacent offices, thus short communication channels), cross-national cooperation in the project - this is also how you speak English -, space for bringing in your own ideas. Tea/coffee kitchen with fruit and nuts, drinks and specialist literature. The technical side was by no means always easy, but in what demanding company it is already ...

Good mood, cool corporate culture! Recommended!