Anthropic’s Interview Process & Questions

The info below is based on conversations with Anthropic engineers.

Anthropic's Interview Process for Software Engineers: 3 Steps

Mid to senior-level engineers interviewing at Anthropic can expect the following process:

• Recruiter call (30 minutes)
• Coding challenge (if you got referred in, they might skip this step) (60-90 mins)
• Onsite (4-5 hours)

At Anthropic, you interview for one of their two orgs: Research or Applied. Your interviewers will all come from that org. There is likely some flexibility in terms of which team in that org you end up on. Team matching can happen before or after the onsite.

General tips:

• Brush up on system design.
• Concurrency and multithreading come up across multiple rounds. Make sure you're comfortable with both before you go in.
• The values/culture round is where most candidates fail, per Anthropic recruiters, so weight your prep accordingly.
• Though Anthropic’s coding questions are algorithmic, they tend to be more practical than the verbatim LeetCode questions that many companies use.
• Use a larger monitor for your coding challenge – time is of the essence, and a laptop has limited real estate to view and write code
• The process moves fast, especially if you have competing offers. Don't expect the buffer time you'd get at Google or Meta.
• They use Python, and you’ll need to be comfortable with it.
  • Note that the Hiring Manager call, if it involves code review, may cover multiple languages

The entire process takes about 3-4 weeks, and we’ve heard it’s very well thought out. From one of our users who recently interviewed with Anthropic:

This felt so easy and thoughtful compared to all the other companies I interviewed with. They have their shit together. Efficient, thoughtful, won’t waste your time. They move faster than expected!

Although the process is usually a positive experience, note that the bar is extremely high, and the interviews are genuinely hard to prepare for, particularly the company values round. The efficient, well-organized reputation holds, but don't mistake that for easy.

AI Usage

AI use in Anthropic interviews is strictly prohibited. They have laid out clear guidelines for when AI is allowed during the entire hiring process, and it’s not permitted at all in live interviews, unless they explicitly say otherwise.

Step 1: Recruiter Call

Anthropic’s recruiter call lasts 30 minutes, and it’s pretty standard fare – they’ll ask you about your previous experience, why you’re interested in Anthropic, your understanding of Anthropic’s value proposition, and what you’re looking for moving forward. They’ll also explain that they are a B Corp and cover what that means.

It’s really important, at this stage, to not reveal your salary expectations or where you are in the process with other companies. We’ve written a detailed post about salary negotiation that lays out exactly what to say if recruiters pressure you to name the first number.

Step 2: Coding Challenge

We’ve heard that this can be done live or asynchronously. Most of the people we spoke to took a 90-minute take-home assessment in CodeSignal, but Anthropic's website says you might get a 60-minute live assessment, so it seems to be role-dependent. It won’t be a LeetCode-style problem, but will still be pretty straightforward. You will be asked to complete a task that gets progressively more complex. One challenge we heard about was to implement a bank with multiple transaction types. You would have to build the core business logic for the application. We’ve heard that candidates tend to run out of time in this round, so manage your time carefully.

One engineer who took the take-home assessment told us that:

The screening was conducted on Code Signal, consisting of a general specification and a black-box evaluator. There were four levels. The spec would get more complicated at each level, and your code had to pass all the tests at one level to get to the next level. All in two hours.

The verbal spec was straightforward. No special algorithmic knowledge was needed. But the spec interpretation could only be obtained by repeatedly running your code to see what test cases failed.

Makes me think the folks who go to the next level are probably good at reading ambiguous specs and trying out theories against black-box graders.

Updates for 2026:

• The bank transaction system question has been widely circulated (it's been spotted on Blind/YouTube). Anthropic still uses it, but be aware interviewers may be alert to over-rehearsed solutions.
• Candidates have reported suspicion around browser setup during live screens. lose anything that could look like a second source, and be prepared to minimize windows if asked.

Step 3: Onsite

The final round typically consists of five sessions, though composition varies by role, and some roles may have the hiring manager call before the onsite.

• Hiring manager call (1 hour). For more detail about the kinds of questions to expect, see the Hiring manager call section below.
• Coding (1 hour). This interview will be conducted in CodeSignal. For more detail about the kinds of questions to expect, see the Coding section below.
• System design (1 hour). This interview will be conducted in the drawing tool of your choice. For more detail about the kinds of questions to expect, see the System Design section below.
• Second coding (role-specific)(1 hour). For more detail about the kinds of questions to expect, see the Coding section below.
• Company Values (1 hour). For more info about what questions to expect, see the Company Values section below.

Types of Interview Questions to Expect at Anthropic

Hiring Manager Call

This call varies quite a bit, as far as we can tell. Sometimes it’s a technical call, and is usually split into two parts. You will be asked to talk about (1) a project you’ve completed and (2) review code examples in different programming languages. You’ll be asked to detect issues and recognize what task the code is used for. Some candidates reported that this was more of a discussion of past projects or the requirements for the job. It likely depends on the hiring manager in question.

Coding

Anthropic expects production-quality thinking, not just working solutions. Be prepared to defend your time and space complexity, handle edge cases under pressure, and implement data structures from scratch after you've already solved a problem cleanly with a standard library. The style is first-principles –it’s less about throughput, more about critical thinking. Concurrency is a recurring theme across rounds, not isolated to one question.

Most coding rounds are carried out in a shared Python environment, so you’ll need to be comfortable with the syntax and standard library. Note that you do not have to know anything about machine learning or have research experience to interview with Anthropic as a software engineer.

Below are the technical topics you’re likely to encounter in Anthropic interviews. To compile this list, we did two things. First, we spoke to some current and former Anthropic engineers. Then we cross-referenced all the anecdotes we heard with Glassdoor data AND our own data-set of mock interviews:

• Data mutation
• Concurrency
• Multithreading

And here are technical topics that you’re likely to find at other companies as well (for these we’ve created detailed write-ups of their own):

System Design

Candidates have consistently flagged this as one of the most demanding rounds so come prepared.

Expect questions that are directly related to problems Anthropic actually works on: designing an API for serving large language models efficiently, covering request batching, queuing, and how to think about GPU utilization under variable load. For infrastructure or ML-adjacent roles, familiarity with LLM inference concepts will serve you well. You might be asked to:

• Design a system that enables a GPT to handle multiple questions in a single thread
• Design a Claude chat service
• Design a banking app

One candidate who recently went through the process told us:

[Dont’] worry about memory constraints, and focus more on interesting architectural considerations.

Check out our guide to system design interviews to help you prepare.

Company Values

This is a standalone round with non-technical interviewers, and it's where many candidates struggle. Candidates we've spoken to flagged it as the hardest part of the process to prepare for and that it’s quite challenging compared to these types of interviews at other companies, not because the questions are difficult, but because the format is unlike anything they had encountered elsewhere. Multiple interviewees described it as feeling closer to a therapy session than a job interview: deeply personal, emotionally probing, and conversational.

What they're actually testing: Whether you'll hold your values under real pressure, not whether you have the right opinions about AI. They don't want enthusiasm or alignment-signaling. They actively look for skepticism and pushback. If asked for your honest feedback on Anthropic's mission, give one. Thoughtful disagreement lands better than agreement.

The style of questions: Expect a mix of reflective and hypothetical questions. The reflective ones will ask you to draw on real experiences: moments where your values were tested, where you pushed back on something, where you changed your mind about something you'd previously believed strongly. The hypotheticals will put you in novel ethical situations with no clean answer, often ones that probe how you'd apply Anthropic's values to problems you've never rehearsed. Follow-up questions will consistently focus on emotions rather than just outcomes: how you felt at the time, and how you feel about it now.

How to prepare:

• Use deep/serious examples. When drawing on past experience, reach for moments with real ethical weight, situations where something genuinely uncomfortable was at stake. Trivial examples won't land.
• Prepare to talk about your emotions, not just events. Be ready to talk about how you felt about what was happening, not just what was happening. Build that into your examples before you go in. What you did is less interesting to them than how you experienced it.
• Don't over-engineer your answers. The instinct to structure everything like an engineer works against you here. Be a person, not a framework.
• Be skeptical, not a fanboy. Anthropic values critical thinking over enthusiasm. They want to see that you've genuinely wrestled with the implications of what they're building.
• Internalize their actual values. You'll be asked to apply them to situations you haven't rehearsed. Surface familiarity with their mission won't be enough.

How Anthropic Makes Hiring Decisions

Decisions are reached by consensus (everyone agrees to hire or no-hire), but in cases where consensus isn’t possible, the hiring manager has final say.