The step up from mid-level is scope of ownership. Interviewers stop asking whether you can build the thing and start asking why you built it that way, what you rejected, and what broke afterwards.
Engineering loops are the most structured of any discipline, and the most predictable. Expect a recruiter screen, one or two technical rounds, a system design conversation at mid-level and above, and a behavioural round that is usually underestimated.
The technical rounds are rarely won on the answer. They are won on narration — whether the interviewer can follow your reasoning while you work, and whether you say the trade-off out loud instead of silently picking one.
MockLive AI runs a spoken Senior Software Engineer mock interview — behavioral, live coding, system design and technical deep-dive rounds — with an AI interviewer who asks questions like “Describe a technical decision you made that you would make differently now”, follows up on what you actually say and scores you on a fixed rubric; the first 7-minute interview is free. How it compares with other AI interview tools →
Each round is run by the interviewer built for it, with its own scoring axes — not one generic interviewer asked to change subject.
A balanced round across experience and role-specific topics.
Scored on: Technical communication · Engineering depth · Ownership & collaboration
Past experience, STAR stories, collaboration, and conflict.
Scored on: Technical communication · Engineering depth · Ownership & collaboration
Solve a coding problem in the editor, out loud.
Scored on: Problem-solving communication · Engineering correctness · Adaptability & craft
How the live coding round works →Architecture, scale, data models, and trade-offs.
Scored on: Technical communication · Engineering depth · Ownership & collaboration
Drill into your resume projects and domain fundamentals.
Scored on: Problem-solving communication · Engineering correctness · Adaptability & craft
Six you can expect, in the register interviewers actually use. Answer them out loud before you read the next section — reading a question and answering one are different skills, and only the second is marked.
The gap between these two is most of your score, and it is easier to see than to be told.
“Describe a technical decision you made that you would make differently now.”
A decision that turned out fine, described as a mild regret. It dodges the question and reads as an unwillingness to be wrong in front of an interviewer.
A real one with a cost attached — what you chose, what it cost the team six months later, what signal you now watch for. Seniority is measured by whether you can hold your own mistake without either minimising or over-apologising.
The post-mortem nobody sends you. These are specific to this loop rather than general interview advice.
For Senior Software Engineer roles, a general round runs with Kai — system design, trade-offs, and war stories from production. It is the fastest way to find out which round you actually need to work on. The first session is free.
Practise a Senior Software Engineer interview →Before you practise, it is worth reading how the common rounds are marked: tell me about yourself, behavioural questions and STAR, and system design.
Questions like these: “Describe a technical decision you made that you would make differently now.” “How do you decide what to build yourself and what to take off the shelf?” “Tell me about a time you inherited something badly built. What did you do first?” “Design a service that ingests events and reports on them in near real time.” “How do you handle a teammate whose code you keep having to fix?” “What is the last thing you shipped that broke, and how did you find out?”
Expect General / Mixed (A balanced round across experience and role-specific topics), Behavioral (Past experience, STAR stories, collaboration, and conflict), Live Coding (Solve a coding problem in the editor, out loud), System Design (Architecture, scale, data models, and trade-offs) and Technical Deep-Dive (Drill into your resume projects and domain fundamentals). The step up from mid-level is scope of ownership. Interviewers stop asking whether you can build the thing and start asking why you built it that way, what you rejected, and what broke afterwards.
Describing scope you had rather than judgement you exercised. Owning a large service is not the same as choosing well. Answering 'why did you build it that way' with the constraint and never the alternatives you rejected. Treating the system design round as a drawing exercise and never naming a trade-off out loud.
Out loud, with someone who follows up. MockLive AI's interviewer for this role asks these questions, pushes back on thin answers and scores you on a fixed rubric, with the transcript and every answer replayable. The first 7-minute interview is free and needs no card.