The unusual one: the technical rounds are normal, but the general round is mostly not about engineering. It is about sitting with a customer, scoping a vague problem, and defending a trade-off out loud to someone non-technical.
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 Forward Deployed Engineer mock interview — behavioral, live coding, system design and technical deep-dive rounds — with an AI interviewer who asks questions like “A customer describes a problem vaguely. How do you scope it?”, 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: User-first framing · Prioritization & execution · Product judgment & influence
Past experience, STAR stories, collaboration, and conflict.
Scored on: User-first framing · Prioritization & execution · Product judgment & influence
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.
“Tell me about a time you told a customer they were the wrong thing.”
Either capitulating — 'the customer is always right, we built it' — or bulldozing them with technical reasons. Both fail the same rubric.
Find the need under the request, name it back to them, and offer the thing that actually serves it. Then say what you did when they still wanted the original. This round is testing whether you can disagree and keep the relationship.
The post-mortem nobody sends you. These are specific to this loop rather than general interview advice.
For Forward Deployed Engineer roles, a general round runs with Leila — customer insight, prioritization, product judgment, and execution trade-offs. It is the fastest way to find out which round you actually need to work on. The first session is free.
Practise a Forward Deployed 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: “A customer describes a problem vaguely. How do you scope it?” “Tell me about a time you told a customer they were asking for the wrong thing.” “How do you decide what to build for one customer versus what belongs in the product?” “Explain a technical constraint to someone non-technical, and hold the line on it.” “How do you work when the requirements change every week on site?” “What do you do when the customer's data is nothing like the demo data?”
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 unusual one: the technical rounds are normal, but the general round is mostly not about engineering. It is about sitting with a customer, scoping a vague problem, and defending a trade-off out loud to someone non-technical.
Answering the general round as an engineer — deep technical answers to questions that were about the customer. No instinct for the difference between a bespoke build and a product feature, which is the core commercial judgement of the job. Being unable to explain something technical without jargon when the interviewer deliberately plays non-technical.
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.