Zipline·Software Engineer·Onsite - System Design / Architecture
- Design a safe and redundant railroad crossing system.
“Not what I was expecting.”
Mid-sized
Screna has 13 Zipline interview write-ups. The most reported round is the technical phone screen (6).
13 interview notes · updated Jul 2026
“Not what I was expecting.”
“Talked about drone delivery and access to medicine in underserved regions, which felt right but also kind of obvious.”
“They wanted the real solution, not just a two-stack hack that passes most cases.”
“This is the classic monotonic stack problem and I knew I'd seen it before, which somehow made it worse because I second-guessed myself the whole time.”
“This is where I spent most of my mental energy.”
“This one took a while to scope properly.”
“This one is bigger than it looks.”
“Classic monotonic stack problem.”
“This was the whole interview.”
“The OOP design part was fine but I underestimated how much they'd scrutinize interface definitions before letting us move forward.”