Tell me about a time you influenced an engineering decision without having formal authority.

Influence a decision without formal authority

Builds a concrete story about earning alignment through evidence, listening, and a low-risk path rather than positional power.

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TL;DR

Several teams were creating write endpoints with different retry behavior, and support had already seen duplicate operations after client timeouts. I did not own those teams, so I gathered two concrete incidents, wrote a small idempotency proposal, and asked representatives from each team to challenge it. We agreed on a shared request-key contract and one pilot endpoint before asking everyone to adopt it.

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Practice focus

Influence, trust, stakeholder alignment, technical judgment, and the ability to move a decision without escalation theater.

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Core answer
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Why this question matters
Senior individual contributors are often expected to improve decisions across teams without owning the people or roadmap.

Use this as an adaptable model, not a story to claim as your own. Replace the project, constraints, your actions, collaborators, outcome, evidence, and reflection with truthful details from your experience.
Several teams were creating write endpoints with different retry behavior, and support had already seen duplicate operations after client timeouts. I did not own those teams, so I gathered two concrete incidents, wrote a small idempotency proposal, and asked representatives from each team to challenge it. We agreed on a shared request-key contract and one pilot endpoint before asking everyone to adopt it.
Checkpoint
Stronger answer
Optional upgrade with examples, trade-offs, and sharper phrasing.
The main resistance was not technical disagreement; teams were worried about migration cost and a standard that ignored their workflows. I separated the invariant from the implementation: stable operation identity and replayed outcomes were required, while storage and expiry could vary. The pilot produced code, tests, and support evidence that made the broader decision easier than another architecture presentation would have.

Review signals

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Common mistakesCandidateCommon mistakesMistakes that weaken the answer or signal shallow understanding.Open details

Details

Equating influence with making a persuasive presentation.
Skipping the concerns of teams that must adopt the decision.
Escalating before trying evidence and a reversible pilot.
Taking credit for a decision other people helped shape.

Tell me about a time you influenced an engineering decision without having formal authority.

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