Pros: There are some nice people in the Dublin and Berlin offices. (Although the Berlin office is now nearly empty.) Actual ceilings, which are very helpful if you value sound not traveling too far. (Although everyone still wears headphones, it's a loud office regardless.) Recommend getting reviews on managers you'll be working under; quality is a bit hit and miss, with large differences.

Cons: Severe lack of promotion and growth opportunities. I saw multiple people who were waiting for suitable projects to display they deserved a promotion. While management was convinced they deserved it, they would string people along without taking action. High turnover of managers; none of mine lasted a year. Strong recommendation against joining a team with a manager who hasn't been at the company for less than two years in a management role. High employee turnover. High degree of politics makes it hard to stand out as a non-US developer. Male-dominated culture; very little diversity is present. Engineering is almost entirely male. Company claims to believe in meritocracy. Open-plan office. Company is skimping on providing a properly heated (winter) or cooled (summer) environment. Climate control is only active on workdays during business hours, making the office freezing cold during winters (all Monday because the heating needs to counter an entire weekend without heating, and each morning until a night's worth of cold has been evicted). A lot of people use blankets. Accessible toilet is used as a storage cabinet. Travel ban kicks in earlier and earlier each year as a cost-saving measure.

Pros: Great work environment, friendly staff.

Cons: Low retention, fast-changing projects.

Pros: Work with people from all around the world. Nice office, good location.

Cons: If you are not working on Groupon Germany or USA, as a software developer, you will not be working at the core of the backend. You will probably work on an in-house tool for some particular team.