Sr Engineer, Software (.Net)
Posted Oct 2, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Tell me about a production bug that was hard to find. How did you track it down?
What they are checking: Whether they debug methodically with logs and evidence, rather than changing code until the problem disappears.
Our development teams sit in several countries. Tell me about working on a project with engineers in other time zones.
What they are checking: Whether they communicate clearly in writing and hand off work cleanly across a global team.
What would you do
How do you review a junior developer's pull request that works but is hard to maintain?
What they are checking: Whether they teach through code review and raise the team's standard without crushing confidence.
A product manager wants a feature in two weeks that you think needs six. How do you handle it?
What they are checking: Whether they negotiate scope honestly and offer options, instead of either caving or flatly refusing.
How do you decide when to refactor old code and when to leave it alone?
What they are checking: Whether they weigh business value and risk before rewriting code that already works in the field.
About the work
Walk me through a .NET application you designed from the ground up. What choices did you make about architecture, and would you make them again?
What they are checking: Whether they can explain design decisions and their tradeoffs, which is what separates a senior engineer from a fast coder.
Fueling sites run payment and tank gauging software that cannot go down. How would you design a .NET service that keeps working when the network to the cloud drops?
What they are checking: Whether they plan for offline operation and safe recovery, which matters for equipment at a gas station.
How do you handle async code and threading in C# without creating deadlocks or race conditions?
What they are checking: Whether they understand concurrency deeply enough to avoid bugs that only show up in the field under load.
Payment data passes through fueling systems. What do you do in code to protect card data and meet PCI requirements?
What they are checking: Whether they treat security as part of everyday coding, since a breach at a fuel site hurts customers and the brand.
What is your approach to automated testing in a .NET codebase that has very little coverage today?
What they are checking: Whether they add tests where risk is highest and improve a legacy codebase gradually instead of stalling on a rewrite.
What does a good CI/CD pipeline look like for software that ships to devices at customer sites?
What they are checking: Whether they think about safe releases, versioning and rollback when software runs on hardware far away.
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Practice this out loudThe full job description
As published by Dover.