Senior hiring is a prediction problem under uncertainty. Most interview processes try to solve it by adding more stages and more homework. The result is a slow, expensive funnel that filters for candidates with free evenings rather than candidates who will do great work.

We redesigned our senior process around three principles: evaluate judgment in context, simulate the actual job, and keep the total candidate time under five hours.

What we were optimizing for

We looked at eighteen months of hiring and performance data. The strongest predictors of success were not algorithm speed or take-home polish. They were:

  • Ability to frame an ambiguous problem and choose a sensible first step.
  • Quality of technical communication with non-engineers.
  • Evidence of operating in production: trade-offs, incidents, and maintenance.
  • Collaboration behavior under mild disagreement.

We rebuilt the loop around those signals.

The four-stage loop

  1. 30-minute screens. A recruiter conversation plus a short, structured technical discussion. No live coding. The goal is mutual fit and a realistic role preview.
  2. 90-minute systems interview. A collaborative design conversation based on a real, slightly redacted problem from our platform. Candidates can ask for data, constraints, and customer context. We evaluate reasoning, not memorized patterns.
  3. 60-minute code review. The candidate reviews a small pull request with a bug, a design smell, and a missing test. This mirrors the actual work of a senior engineer far better than building a toy from scratch.
  4. 60-minute leadership conversation. A peer and a cross-functional partner explore how the candidate has handled disagreement, mentoring, and delivery pressure. Behavioral questions are tied to specific examples.

Total candidate time: under five hours, none of it unpaid homework.

If your interview process requires more unpaid work than the first week of the job, you are selecting for available time, not engineering judgment.

Calibrate before you interview

Interviewers need a shared rubric, not a shared vibe. Before the first candidate, we run a calibration session using recorded or simulated interviews. Each interviewer scores independently, then compares notes. This reduces the halo effect and makes debriefs faster.

Make the offer conversation honest

Senior candidates are evaluating you too. Share the real challenges: the migration in progress, the team's current on-call load, the areas where the product is still finding fit. Candidates who hear an honest story self-select more accurately. That saves everyone months.

The goal is not to hire faster at any cost. It is to make a high-confidence decision without treating candidates as free labor.