Senior Software Developer - Java
Posted Sep 23, 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 the most complex Java full-stack system you've owned. What decisions did you make that you'd make again, and which would you change?
What they are checking: Whether their seven-plus years include real ownership and honest reflection, which separates senior from long-tenured.
Tell me about a developer you mentored. What did you do, and how did you know it worked?
What they are checking: Whether they actually grow other developers, which the posting calls out as a core senior responsibility.
Tell me about a time you set or changed a coding standard across a team. How did you get people to follow it?
What they are checking: Whether they can lead consistent practices through persuasion and tooling, not just by decree.
What would you do
In an architecture review, a proposed design will work now but you think it will struggle in two years. How do you raise that?
What they are checking: Whether they can make a persuasive case for long-term health without blocking reasonable progress.
A project plan has a date that you believe the team can't meet. What do you do?
What they are checking: Whether they raise risk early with options, instead of staying quiet and missing the date.
About the work
A Java service has memory growing steadily until it falls over every few days. How do you investigate?
What they are checking: Whether they can use heap dumps, GC logs and profiling to find leaks instead of just restarting servers.
How do you design a Java application so it stays maintainable as more developers and features are added?
What they are checking: Whether they think about module boundaries, clear interfaces and testability for long-lived enterprise code.
Walk me through how you handle concurrency in Java when several threads update shared data.
What they are checking: Whether they understand thread safety and its tradeoffs, which causes subtle bugs in high-volume systems.
What does a thorough code review from you look like, and how do you give hard feedback without discouraging people?
What they are checking: Whether their reviews raise team quality while keeping trust, which is what makes reviews work.
How do you approach the front-end side of a full-stack Java application, and where do you draw the line between client and server logic?
What they are checking: Whether their full-stack skills are real and they make sensible decisions about where logic belongs.
How do you decide when to upgrade a framework or library in a mature Java application?
What they are checking: Whether they weigh security, support and risk when keeping a long-lived system current.
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Practice this out loudThe full job description
As published by Uline.