Slack Software Engineer interview experience

After the first recruiter call, I had a chat with a staff engineer. That was followed by a technical challenge where I built a mini-app.

From there, things got more intensive: I ended up with four separate interviews with the team, and two of those were system design discussions. The overall difficulty matched that structure—it felt like it ramped up, not down—so I was constantly switching between building, explaining tradeoffs, and thinking at a systems level.

It took about four weeks end to end, and by the time the team loop wrapped, I could tell I’d given it a serious effort. I didn’t