Anthropic Software Engineer Interview Questions
Anthropic Software Engineer interview questions tend to reflect the company’s dual focus on building reliable, high-quality software and on safe, responsible AI. Expect a blend of practical algorithmic coding, systems design, and mission-aligned behavioral or safety reasoning. Interviewers often probe clarity of thought and written communication as much as raw coding speed, and you should be ready to explain trade-offs, failure modes, and how you would make a system robust in real-world conditions. For interview preparation, plan for a multi-step process: an initial recruiter screen, a timed coding exercise or take-home, a hiring-manager conversation, and a longer onsite loop that mixes coding, design, and culture-fit questions. Prepare by practicing medium-to-hard coding problems with an emphasis on clean, modular solutions, refreshing distributed-systems and API design fundamentals, and producing concise one-page design notes or safety-minded postmortems you can discuss. Balance technical polish with concrete stories of impact and collaboration; reviewers are looking for engineers who can ship reliable systems, reason about edge cases, and communicate trade-offs clearly.

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Implement Persistent Memoization LRU Cache
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Implement and analyze custom attention
Implement Scaled Dot-Product Attention in PyTorch (from scratch) Context You will implement a numerically stable, vectorized scaled dot-product attent...
Explain projects and handle AI-safety conflicts
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Design an in-memory banking service
Design an in-memory banking service supporting timestamped operations and edge-case semantics. Implement: ( 1) create_account(id, t): Create a new acc...
Improve concurrency beyond a single lock
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Implement a hierarchical file store
This question evaluates proficiency in modeling hierarchical file systems, path parsing and manipulation, managing mutable file contents, and analyzin...
Design a scalable network I/O service
System Design: High-Volume Network I/O Backend (Files and Streaming) Context Design a backend service that supports millions of users uploading and do...
Design a single- and multi-threaded web crawler
Web Crawler (single-threaded, then multi-threaded) You are given: - A starting URL startUrl (e.g., "http://news.example.com/a/index.html"). - An inter...
Implement a Banking System
Design and implement an in-memory banking system. All operations are processed in non-decreasing timestamp order. Account identifiers are strings. Mon...
Design production-ready dedup service
System Design: Production-Ready File Deduplication Service Context Design a multi-tenant cloud service that stores files and achieves space savings vi...
Walk through a recent technical project
Project Deep-Dive (Onsite Behavioral + Technical) Context: Choose a recent technical project (ideally within the last 12–18 months) where you led or h...
Find Duplicate Files
Implement a file deduplication tool. You are given a root directory containing many files. Return groups of duplicate files. Two files are duplicates ...
How would you scale batch image pipelines?
This question evaluates a candidate's competence in designing scalable, reliable batch image-processing pipelines, testing knowledge of distributed sy...
Design a prompt-sharing platform
This question evaluates system design competencies including product and backend architecture, data modeling and indexing, permission and sharing mode...
Fix a Corrupted Bootloader Instruction
This question evaluates the ability to simulate instruction-level program execution, reason about control flow and mutable program state (instruction ...
Discuss career decisions and culture fit
Behavioral and Leadership Technical Screen — Software Engineer Context You’ll be assessed on how you make and communicate decisions, collaborate acros...
Design a scalable, reliable system
System Design: Global Photo/Video File Storage and Sharing ("CloudDrive") Context Design a scalable, highly reliable consumer service where users uplo...
Maximum-Length Unique-Character Subset
This question evaluates a candidate's ability to combine bitmasking with backtracking or subset enumeration to maximize a constraint over combinations...
Word Search in a Letter Grid
This question evaluates a candidate's ability to search for multiple target words within a grid of letters using depth-first traversal and backtrackin...
Path Resolution with Symbolic Links
This question evaluates a candidate's ability to implement filesystem-style path resolution, including handling relative and absolute paths, dot compo...