Much of a senior engineer’s impact comes from influencing people they do not manage: other teams, senior stakeholders, peers with different priorities. A strong answer shows credibility, framing for the other side’s interests, and evidence from a small experiment rather than a mandate.
Before you start
You should have an example of driving a change without formal authority. This article gives a structure for it.
Step-by-step walkthrough
Step 1: Build credibility first
Influence starts with a track record: delivering what you promised and being right on technical calls. Without credibility, even a good idea is dismissed. Show that you earned trust before asking people to follow.
Step 2: Frame it in their interest
An idea framed as “better engineering” rarely lands; framed as solving a problem the other team has, it competes. Understand what each audience values — reliability, speed, cost — and present the proposal in those terms.
Step 3: Pilot and show evidence
A small, low-risk pilot produces evidence that persuades far better than an argument. Data from a real experiment lowers the perceived risk and gives allies something concrete to point to.
Worked scenario
A concise STAR answer shows the sequence.
Situation: I wanted another team to adopt a shared library, but I had no authority over them.
Task: Get adoption without a mandate.
Action: Piloted it in one service, measured a 30% latency drop, presented it in their
team meeting framed around their reliability goal, and offered to help migrate.
Result: They adopted it; two other teams followed on the strength of the pilot.Walk through the example
The answer shows credibility (a working pilot), framing (their reliability goal) and evidence (a measured improvement). It never relies on a mandate, which is the point of “without authority”. The result cascades because the pilot gave other teams proof.
Common mistake
Describing how you convinced people by being right, or relying on escalation to force adoption. Another is a proposal with no evidence, so it reads as opinion.
Verify the behavior
Check that your story includes how you earned credibility, how you framed for the audience, and a concrete piece of evidence. Be ready for a follow-up where the pilot did not persuade.
Interview exercise
How do you influence a team that does not share your priorities?
Answer and reasoning
Find the overlap: how your proposal advances something they already care about, such as reducing their incidents or unblocking their roadmap. Present it in their terms and lower the risk with a small pilot they can observe. If there is no overlap, be honest and let it go rather than pushing a change that does not serve them.
Continue learning
Compare leadership in Leadership without title and mentoring in Mentoring. Read the Harvard Business Review on influence and try the Behavioral interview questions.