Hire for agency, not algorithms

Hire engineers who solve your problems.

We recreate real tickets and PRs from your backlog as interviews — no sensitive data exposed. See every edit, every AI prompt, every decision — not just a score.

Candidate experience
37:42|▶ RunSubmit
Problem
CAR-523
PR #1098
CAR / Backlog / CAR-523
tmp dirs leaking after failed runs??? disk almost full again
● In Progress

INC-3201 — got paged, execution host at 94% disk. runs failing with No space left on device.

/tmp/canary/ has 3000+ dirs from old runs that were never deleted. seems worse on high-volume days.

Workspace
solution.py
tests.py
README.md
from sandbox import create_sandbox, write_files
from sandbox import run_tests, cleanup
def execute_run(req):
sandbox = create_sandbox(req["run_id"])
write_files(sandbox, req["code"])
result = run_tests(sandbox, req["timeout"])
cleanup(sandbox)
return result
Tests 2/5
✓successful run returns output
✓cleanup after success
✗cleanup after timeoutSandbox dir still exists

The technical interview, rebuilt for how engineering actually works.

01

Problems built from your backlog

Connect GitHub or Jira and we recreate a real ticket or PR as a sandboxed interview problem. Candidates get the full context — no sensitive data, no access to your actual codebase.

02

A full session replay, not a score

Every edit, every AI prompt, every dead end is recorded. Hiring teams see exactly how a candidate thinks — not just whether they got the right answer.

03

Measures agency, not memorization

An unfamiliar codebase, a vague ticket, no obvious root cause — the way real work shows up. Canary scores how a candidate navigates ambiguity, uses their tools, and drives to a fix: the agency that actually predicts on-the-job performance.

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