I've been working 4d/week for 4 years for a small Belgian company. I'm a software engineer. I've never got any complain from my manager, employer or colleagues

I've been working 4d/week for 4 years for a small Belgian company. I'm a software engineer. I've never got any complain from my manager, employer or colleagues about it. I'm usually taking my day off on Friday. All my colleagues know it, so we will try to schedule meetings for which I'm required on other days. If that's not possible (it only happens a few times per year), I'm flexible enough to take my time off some other day. I might be 90% as productive compared to when I was when working full-time. This difference is probably too low to be noticeable by anybody else in the team. My gross got reduced by 20%. But considering the way taxation works in Belgium, I'm only getting about 10% less on my bank account. I also got promoted to a senior role since then, which entirely offset the difference anyway. While it has been working extremely well for me (I spent the additional free time doing physical activities and launching my personal project [1]), it might be harder/impossible to get into higher positions (team leader, project manager...) while working part-time. -- [1] https://noisycamp.com https://noisycamp.com