Interview questions

Interview questions by role, with scoring rubrics

Original questions for 20 roles and formats, each with what a strong answer looks like, red flags and a simple 1 to 4 rubric. Use them in your own loops or in an AI first round.

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Backend developer interview questions (2026)APIs, data integrity, auth, reliability and production debugging, with what a strong backend answer covers. Behavioral interview questions (2026)Questions on conflict, ownership, priorities, feedback and judgment, each with a short sample answer and what to listen for. Customer service interview questions (2026)Situational, role-play and STAR questions for support hiring, with plain guidance on what to listen for in every answer. Data engineer interview questions (2026)Modeling, idempotent pipelines, streaming and data quality, with what a strong data engineer says and what to watch for. Data scientist interview questions (2026)Experiments, models, messy data and stakeholder stories, each with a model answer you can score against. DevOps interview questions (2026)From a slow Linux box to a 2 a.m. page: practical DevOps questions with what a strong answer covers. Frontend developer interview questions (2026)Framework-agnostic questions on the browser itself: semantics, accessibility, layout, performance and security. Java interview questions (2026)Modern Java from equals and hashCode to virtual threads and heap dumps, with what a strong answer sounds like. JavaScript interview questions (2026)Language fundamentals, async behavior and practical bugs, checked against current ECMAScript and Node. Machine learning engineer interview questions (2026)From NaN losses to RAG failures and safe rollouts: questions that show whether someone can run ML in production. Node.js interview questions (2026)Event loop, modules, streams and production habits: Node.js questions with what a strong answer actually says. Product manager interview questions (2026)Situational and STAR questions for PM hiring, with clear guidance on what a strong answer covers and what should worry you. Python interview questions (2026)Fundamentals, practical scenarios and STAR behavioral questions, each with a model answer and red flags. QA engineer interview questions (2026)Test design, automation, release risk and STAR stories, with notes on how a real quality engineer thinks. React interview questions (2026)Rendering, hooks, Server Components and practical scenarios, written for React 19 and the React Compiler era. Sales interview questions (2026)Discovery, objections, forecasting and STAR stories, with notes on what separates a closer from a good talker. Software engineer interview questions (2026)A language-agnostic first round: problem solving, code quality, debugging and how an engineer works with a team. SQL interview questions (2026)From joins and NULL traps to window functions, upserts and reading a query plan, using one simple orders schema. STAR interview questions and the STAR method (2026)How to structure an answer, how to probe one, and 16 practice questions with short sample STAR answers. System design interview questions (2026)Core concepts plus nine full design prompts, with the trade-offs a strong candidate should raise on their own.

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