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Vanta interview notes, page 2 of 2

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Screna has 13 Vanta interview write-ups. The most reported round is the technical phone screen (8).

13 interview notes · updated Jul 2026

Vanta·Software Engineer·Technical Phone Screen

Jun 2026
Vanta software engineer interview with a pretty interesting coding problem around test run logging and failure tracking. Two parts to the same problem, and the second part was where things got tricky.
  • Implement a log(test_id, timestamp, status) function to record test runs where timestamps are strictly increasing across all test IDs. Then implement get_min_time_to_pass(test_id) that returns the minimum duration from the start of any consecutive failure streak to the next passing status, or null if the test never passes.
  • Using the same log() function, implement get_longest_failure_window(min_tests) that returns the start and end timestamps of the longest contiguous time window where at least min_tests distinct tests are failing simultaneously. Return null if no such window exists.

“The log part was fine, just needed a sorted structure keyed by timestamp globally.”

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Vanta·Software Engineer·Technical Phone Screen

Jul 2026
Vanta software engineer interview with a data structures design problem that had a tricky follow-up. The main question was manageable but the follow-up on concurrent failures pushed into territory I wasn't fully prepared for.
  • Design a data structure that supports logging test run results by test ID, timestamp, and pass/fail status (timestamps are globally increasing), and also supports querying the shortest time from the start of any contiguous failure block to the next passing result for a given test ID.
  • Extend the same data structure to support a query that returns the longest contiguous time interval during which at least a given number of distinct tests are simultaneously failing, with the end timestamp being exclusive.

“The logging part was fine, basically a map from test ID to an ordered list of events.”

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Vanta·Software Engineer·Technical Phone Screen

Jul 2026
Vanta software engineer interview that was basically one big design-and-implement session. They gave me an in-memory logging service to build from scratch, then piled on a gnarly concurrency follow-up. Felt more like a systems mini-project than a typical coding round.
  • Design and implement an in-memory service that logs test run results with a log(test_id, timestamp, status) function, where status is either 'pass' or 'fail', and events arrive with strictly increasing timestamps across all test IDs.
  • Implement getMinPassTransition(test_id): return the minimum elapsed time for a test to go from failing to passing, where consecutive fail reports count as a single failure segment starting at the first fail. Return null if no complete fail-to-pass transition exists.
  • Add a getMaxConcurrentFailures(min_tests) function that finds the longest contiguous time interval during which at least min_tests distinct tests are failing simultaneously. Return an object with inclusive start and exclusive end timestamps, or null if no such interval exists. How do you handle tie-breaking and what are the complexity implications?

“The logging part itself was fine.”

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