At my old job I was routinely praised for being a hard worker because people kept seeing me stay to 7pm. I usually heard comments like, "don't work too hard" and "make sure you don't stay too late".

What no one seemed to notice was I was coming in at 11. I never felt the need to correct anyone.

It’s also a great tip to work on your body language that says “I’m very busy with important things” even if you totally aren’t. For example, when you go to the break room or to sit on the toilet or to have a smoke break make sure you move very fast and purposefully from your desk so people think you’re just running back and forth to talk to people.

Also, don’t go anywhere empty handed. Always carry a clipboard or file folder with you to get donuts from the break room.

Smartphone works great for this in our industry. Be staring at it furiously typing as tho on slack/reviewing PRs while transiting to the shitter

Japanese workers have mastered this. So many people running about the office without actually going any faster.

If you want to be noticed, send out a few emails just as you get there.

In many clients you can program emails too, if you want to fake that. So it's not fully reliable either.