Anthropic
AI safety and research company behind Claude, focusing on constitutional AI.
5 Rounds
~20 Days
Very Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Cloud Engineer
•
Behavioral
•
medium
Anthropic prioritizes safety and reliability. Tell me about a time you had to push back on a deployment or architectural decision because it compromised system security or reliability, even when facing tight deadlines.
#Communication
#Safety
#Stakeholder Management
#Ethics
Cloud Engineer
•
Behavioral
•
medium
Walk me through your troubleshooting process for a Sev-1 incident where latency for the Claude API spikes by 500% across all regions. What metrics do you look at first?
#Troubleshooting
#SRE
#On-call
#Root Cause Analysis
Cloud Engineer
•
Behavioral
•
medium
You receive an alert that API latency has spiked by 400% in the last 5 minutes. Walk me through your incident response and debugging process.
#Troubleshooting
#On-call
#Communication
#Root Cause Analysis
Cloud Engineer
•
Behavioral
•
medium
Tell me about a time you caused a production outage. How did you handle it, and what did you learn?
#Ownership
#Blameless Postmortems
#Learning from Failure
Cloud Engineer
•
Behavioral
•
medium
Anthropic places a high value on AI safety. How do you see the role of a Cloud Engineer contributing to the safety and security of our models?
#AI Safety
#Security
#Infrastructure Integrity
Cloud Engineer
•
Behavioral
•
medium
Tell me about a time you had to push back on a feature request or architectural decision because it compromised security or reliability.
#Communication
#Conflict Resolution
#Security First
Cloud Engineer
•
Behavioral
•
medium
Describe a situation where you had to learn a completely new technology under a tight deadline to solve a critical infrastructure problem.
#Adaptability
#Continuous Learning
#Problem Solving
Cloud Engineer
•
Behavioral
•
hard
How do you balance the need for rapid iteration by AI researchers with the need for stable, secure, and cost-effective infrastructure?
#Developer Experience
#Governance
#Cost Optimization
#Agility
Cloud Engineer
•
Behavioral
•
easy
Tell me about a time you automated a tedious operational task. What was the impact, and how did you measure success?
#Toil Reduction
#Automation
#Impact Measurement
Cloud Engineer
•
Coding
•
medium
Write a Python script using boto3 to identify and terminate orphaned EC2 GPU instances that have been idle for more than 4 hours, ensuring they aren't part of an active Ray cluster.
#Python
#AWS API
#Cloud Cost Optimization
#Scripting
Cloud Engineer
•
Coding
•
medium
Write a Go program that concurrently health-checks a list of internal model endpoints. It should implement a worker pool, timeout after 2 seconds per request, and aggregate the results into a summary report.
#Go
#Concurrency
#Networking
#Error Handling
Cloud Engineer
•
Coding
•
easy
Write a bash script to parse a large Nginx access log file, extract the top 10 IP addresses making requests to a specific API endpoint, and dynamically block them using iptables.
#Bash
#Linux
#Networking
#Security
Cloud Engineer
•
Coding
•
medium
Write a Terraform snippet to create an AWS IAM role that can only be assumed by a specific Kubernetes service account (IRSA).
#Terraform
#AWS IAM
#EKS
#Security
Cloud Engineer
•
Coding
•
medium
Write a Python script using `boto3` to find and delete all unattached EBS volumes in an AWS account that are older than 30 days.
#Python
#Boto3
#AWS EC2
#Automation
Cloud Engineer
•
Coding
•
medium
Implement a concurrent worker pool in Go to process a large queue of infrastructure provisioning tasks efficiently.
#Go
#Concurrency
#Goroutines
#Channels
Cloud Engineer
•
Coding
•
easy
Write a function to parse a large Nginx access log file and return the top 10 IP addresses with the highest HTTP 5xx error rates.
#Python
#Log Parsing
#Data Structures
#Regex
Cloud Engineer
•
Coding
•
hard
Given a JSON response from a cloud API containing nested resource dependencies, write an algorithm to determine the correct deletion order.
#Graphs
#Topological Sort
#DFS
#JSON Parsing
Cloud Engineer
•
Coding
•
medium
Write a script to automatically scale an Auto Scaling Group based on a custom metric (e.g., GPU memory utilization) retrieved from Prometheus.
#Python
#Prometheus API
#AWS Auto Scaling
#Automation
Cloud Engineer
•
System Design
•
hard
Design a multi-region Kubernetes cluster architecture to support distributed LLM training workloads. How do you handle GPU node provisioning, network topology, and fault tolerance?
#Kubernetes
#GPU Compute
#Distributed Systems
#AWS/GCP
Cloud Engineer
•
System Design
•
hard
Design a high-throughput storage solution for feeding petabytes of text data into a distributed training cluster. Compare using S3 directly vs. FSx for Lustre.
#Storage
#High Performance Computing
#AWS
#Data Pipelines
Cloud Engineer
•
System Design
•
hard
Design the observability stack for a fleet of thousands of GPU instances. How do you collect, aggregate, and alert on GPU memory utilization and temperature without overwhelming the metrics backend?
#Observability
#Prometheus
#Grafana
#Scaling
Cloud Engineer
•
System Design
•
hard
Design a global rate-limiting service for the Claude API that needs to handle millions of requests per minute, ensuring strict token-based quota enforcement per customer tier.
#Redis
#Distributed Systems
#API Gateway
#Scalability
Cloud Engineer
•
System Design
•
hard
Design a multi-region active-active inference API for Claude. How do you handle routing, state, and failover?
#Global Routing
#High Availability
#Load Balancing
#Multi-Region
Cloud Engineer
•
System Design
•
hard
How would you design a scalable infrastructure to manage and provision thousands of GPUs for distributed training jobs?
#GPU Provisioning
#AWS EC2
#Kubernetes
#HPC Networking
Cloud Engineer
•
System Design
•
medium
Design a rate-limiting service for our public API that handles sudden spikes in token generation requests across millions of users.
#Rate Limiting
#Redis
#Distributed Systems
#API Gateway
Cloud Engineer
•
System Design
•
hard
Architect a secure storage and retrieval system for massive datasets used in model training, ensuring high throughput and strict access controls.
#AWS S3
#IAM
#Data Security
#Throughput Optimization
Cloud Engineer
•
System Design
•
medium
Design an observability pipeline capable of handling millions of metrics and logs per second from our Kubernetes clusters.
#Prometheus
#Grafana
#OpenTelemetry
#Log Aggregation
Cloud Engineer
•
System Design
•
medium
How would you design a deployment pipeline to safely roll out a new version of the Claude model to production with zero downtime?
#Blue/Green Deployment
#Canary Releases
#Traffic Shadowing
#Rollbacks
Cloud Engineer
•
Technical
•
medium
You need to manage infrastructure for a new AI research environment. How would you structure the Terraform state and modules to ensure strict isolation between research teams while sharing core networking components?
#Terraform
#State Management
#Security
#VPC
Cloud Engineer
•
Technical
•
hard
Explain how you would design a secure VPC architecture on AWS to allow Claude inference containers to access external customer APIs (e.g., for tool use) without exposing the inference nodes to the public internet.
#VPC
#NAT Gateway
#Egress Filtering
#Security
Cloud Engineer
•
Technical
•
medium
How would you configure Kubernetes pod anti-affinity, taints, and tolerations to ensure that critical inference API pods are not evicted by heavy batch research workloads on a shared cluster?
#Kubernetes
#Scheduling
#Resource Management
Cloud Engineer
•
Technical
•
medium
Describe how you would implement least-privilege IAM roles for a CI/CD pipeline (e.g., GitHub Actions) that needs to deploy infrastructure to AWS using OIDC.
#IAM
#OIDC
#CI/CD
#AWS Security
Cloud Engineer
•
Technical
•
hard
How would you design a deployment pipeline for updating the base Docker image of our inference service with zero downtime, ensuring that active WebSocket connections to Claude are gracefully drained?
#Docker
#Zero-downtime Deployment
#Load Balancing
#WebSockets
Cloud Engineer
•
Technical
•
medium
GPU compute is our biggest expense. What strategies would you implement at the cloud infrastructure level to optimize costs for ephemeral ML training jobs without slowing down research?
#FinOps
#Spot Instances
#Auto-scaling
#AWS EC2
Cloud Engineer
•
Technical
•
medium
How do you configure Kubernetes to efficiently schedule pods that require specific GPU types (e.g., A100 vs H100) while maximizing utilization?
#Node Selectors
#Taints and Tolerations
#GPU Scheduling
#Resource Quotas
Cloud Engineer
•
Technical
•
medium
Explain how you would troubleshoot a CrashLoopBackOff error in a pod that is supposed to be loading a 100GB model weight file from S3 into memory.
#Kubernetes
#OOMKilled
#Liveness Probes
#Init Containers
Cloud Engineer
•
Technical
•
medium
What are the challenges of running stateful workloads in Kubernetes, and how would you handle persistent storage for a distributed vector database?
#StatefulSets
#Persistent Volumes
#CSI
#Distributed Databases
Cloud Engineer
•
Technical
•
hard
Describe how you would implement network policies in a multi-tenant Kubernetes cluster to strictly isolate research workloads from production inference.
#Network Policies
#Cilium
#Calico
#Zero Trust
Cloud Engineer
•
Technical
•
medium
How do you handle graceful shutdown of a pod serving long-running LLM inference requests that might take up to 60 seconds to complete?
#Pod Lifecycle
#PreStop Hooks
#Termination Grace Period
#Load Balancing
Cloud Engineer
•
Technical
•
medium
You have a Terraform state file that has become out of sync with the actual AWS infrastructure due to manual console changes. How do you resolve this safely?
#Terraform
#State Management
#Drift Resolution
Cloud Engineer
•
Technical
•
medium
How would you structure Terraform modules for a multi-environment (dev, staging, prod) setup to maximize reuse and minimize blast radius?
#Terraform
#Module Design
#CI/CD
#Environment Isolation
Cloud Engineer
•
Technical
•
medium
How do you manage sensitive secrets (like API keys or database passwords) in Terraform without exposing them in the state file or version control?
#Terraform
#Secret Management
#AWS Secrets Manager
#HashiCorp Vault
Cloud Engineer
•
Technical
•
easy
Explain the difference between `count` and `for_each` in Terraform. When would you use one over the other?
#Terraform
#Syntax
#Resource Iteration
Cloud Engineer
•
Technical
•
medium
Walk me through the process of establishing a secure, private connection between an AWS VPC and a third-party SaaS provider without routing traffic over the public internet.
#AWS PrivateLink
#VPC Endpoints
#Networking
#Security
Cloud Engineer
•
Technical
•
medium
How would you design an IAM strategy to enforce least privilege for researchers needing temporary access to specific S3 buckets containing training data?
#AWS IAM
#ABAC
#RBAC
#Temporary Credentials
Cloud Engineer
•
Technical
•
medium
Explain how AWS Transit Gateway works and how you would use it to connect dozens of VPCs across different AWS accounts.
#AWS Transit Gateway
#VPC Peering
#Hub and Spoke
#Routing
Cloud Engineer
•
Technical
•
hard
What mechanisms would you put in place to prevent data exfiltration from a cloud environment hosting proprietary model weights?
#Data Exfiltration
#VPC Flow Logs
#Egress Filtering
#DLP
Cloud Engineer
•
Technical
•
medium
Describe how you would mitigate a Layer 7 DDoS attack targeting our inference API endpoints.
#DDoS Mitigation
#WAF
#CloudFront
#Rate Limiting
Cloud Engineer
•
Technical
•
hard
How do you define and measure Service Level Objectives (SLOs) for an LLM inference service where latency can vary heavily based on prompt length?
#SLIs/SLOs
#Metrics
#LLM Infrastructure
#Performance
Cloud Engineer
•
Technical
•
easy
Explain the RED metrics. How would you apply them to a microservice architecture?
#Metrics
#Monitoring
#SRE
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