How this guide works
We do not give you a list of questions to learn by heart. Real interviews do not work like that. An interviewer listens to you first, and then asks about what you said, deeper and deeper, until they find where your knowledge stops. You cannot learn that from a list. You can learn it from watching conversations, and then by practising your own.
So we start where a real application starts: with a job description. We read it together, line by line, and say honestly what it asks for, what it does not say, and who should apply. Then you see how the interviews for this role usually run. Then you follow five different people through the same interview, turn by turn, with notes on what the interviewer is checking, what works, and what goes wrong. At the end, you prepare for your own interview.
The company and the candidates are not real. The job description is a composite: we built it from the patterns that repeat in real AI Engineer postings. The conversations are examples, written from our experience of real interviews on both sides of the table.
Inside the guide
Part 1Read the job description
2 pagesThe job descriptionThe AI Engineer job description that this guide uses, built from the patterns in real postings, and a first read to find what the job really is.
15 minRead it honestlyWhat the AI Engineer posting really requires, what is only a wish, what it leaves out, who should apply, and the questions to ask the team.
16 min
Part 2How the interviews run
1 pageHow the interviews runThe five interviews in Quillfield's process, what each one checks, and how a serious interviewer goes from what you say to the edge of what you know.
14 min
Part 3Five candidates, one role
5 pagesThe same technical interview with five different people. Each conversation starts from what the candidate says, and goes deeper from there.
The backend engineerDaniel has seven years of backend experience and one LLM feature in production, and the interview finds his strength in reliability and cost and his edge in evaluation.
20 minThe data scientistA data scientist with deep evaluation skills goes through the technical deep dive, and Nadia follows her strength until she finds the edge in production engineering.
20 minThe self-taught builderYusuf has never had a software job, but he built and measured a real question-answering system, and the interview shows both what that is worth and where it stops.
20 minThe polished CVA consultant whose CV claims more than he did meets an interviewer who asks for details, and the same experience, told honestly, gives him a real chance.
20 minThe domain expertLeila spent 11 years in insurance claims before she learned to build, and her interview shows what deep knowledge of the work brings to an AI team, and where it stops.
20 min
Part 4Prepare for your own interview
1 pagePrepare for your own interviewTurn what you saw in the five interviews into a plan for your own - drill-down notes for your projects, practice out loud, honest answers at the edge, and your questions for the team.
12 min