Most engineering teams run one interview process. Four sessions, the same shape for everyone. The only thing that changes between a junior candidate and a staff candidate is what "passing" looks like at the end. The logic is understandable. One process is easier to calibrate, easier to schedule, and doesn't invite questions from candidates about why the process differs for them.

In practice, though, one process tends to be good for one level and noticeably worse for everyone else. If your process was designed around mid-level hires (and most were, because that's where the volume is), it's probably producing weaker signal at the senior end and unfair friction at the junior end.

What a junior-level process is actually trying to measure

A junior candidate's main question is: can this person grow fast enough to be productive, do they have the baseline skills to start, and does this person have potential to be great? The thing you're trying to predict is trajectory, not current capability. Current capability at the junior level is narrower by definition. What matters more is whether this person, six months from now, is going to be able to carry a feature on their own.

That's a different question from "can this person ship today." It benefits from a different kind of interview:

  • More structured technical exercises, because juniors benefit from clear scaffolding and the exercise itself is part of the signal.
  • Less system-design or architecture focus, because evaluating those at the junior level mostly measures what the candidate read on the weekend.
  • More focus on how they respond to feedback during the interview. Do they hear the interviewer's pushback and update? Do they get defensive? Do they get flustered to the point they stop thinking?
  • More attention to written or spoken communication. A junior who writes clearly can grow. A junior who can't articulate a problem will hit the same ceiling at every review cycle.

None of this is hard. It just doesn't look like what a senior-level process looks like.

What a senior-level process should actually measure

At the staff or senior level, current capability matters more than trajectory. The team isn't hiring a growth bet; they're hiring a person who will do the work this quarter. The question becomes: can this person hold a large, messy, multi-constraint problem in their head and move it forward?

That's a question the usual process is bad at answering. A 45-minute algorithm question doesn't test it. A system-design round run like a quiz doesn't test it. What tests it is a realistic ambiguous scenario the candidate has to structure in front of you, with room for follow-up and disagreement.

Senior-level processes benefit from:

  • At least one session with a long prompt and a short interview, not a short prompt and a long interview. The candidate should have done most of the thinking before the conversation starts. The interview is for excavating that thinking, not generating it live.
  • A session with a peer who isn't going to report to this person. You want to see how they talk shop with an equal, not how they perform when they sense a dynamic. Senior candidates calibrate to their audience; make sure the audience includes one person they can't impress their way past.
  • An explicit conversation about failure. Not the rehearsed "tell me about a time you failed" answer, but a specific design or decision they regret, walked through in detail. The regret-shape of a senior engineer is very different from the regret-shape of a mid-level one. It's easier to see than it sounds.

The bar is a red herring

When teams try to differentiate senior and junior processes, they often fall back to "the bar is higher for seniors." That framing is doing less work than it looks like it is. A higher bar on the same rubric just means the same signal is harder to pass. It doesn't mean you're measuring the right thing at either level.

What actually produces calibrated senior hires is a process designed around the questions senior work raises: scope, stakeholder management, the ability to hold ambiguity, the willingness to disagree constructively with other senior people. What produces calibrated junior hires is a process designed around the questions junior work raises: baseline capability, growth signal, resilience under feedback. Same bar language, different contents.

Where to start if you currently run one process

If you're running one process today and this argument lands, you don't need to redesign four sessions overnight. Pick one level to specialise first. Most teams find it easier to carve off the senior process first, because the stakes of a senior mishire are higher and the current process is usually doing a worse job there. Spend one quarter designing and running it. Watch what changes in the submissions you get. Apply what you learn to the junior process next.

The payoff from level-specific processes is usually two things. The hires you make get more consistent. And the offer-to-acceptance rate goes up at the senior end, because strong candidates can tell the process was designed for their level rather than theirs plus three others.