Palantir
Big data analytics company for defense, intelligence, and enterprise.
5 Rounds
~28 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
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System Design
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hard
Design a continuous deployment system for an air-gapped environment. How do you securely transfer and deploy container images and configuration updates without internet access?
#CI/CD
#Security
#Air-gapped
#Architecture
Cloud Engineer
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System Design
•
hard
Design an infrastructure deployment strategy for a highly classified client where no internet access is allowed, and hardware is completely isolated.
#On-Premises
#Air-gapped
#Infrastructure as Code
Cloud Engineer
•
System Design
•
medium
Design a distributed rate-limiting service for an internal API gateway that handles 100,000 requests per second across multiple regions.
#Distributed Systems
#Rate Limiting
#Redis
Cloud Engineer
•
System Design
•
hard
Design a secure, multi-tenant data processing pipeline where clients can upload custom Python scripts to transform their data.
#Security
#Multi-tenancy
#Sandboxing
#Data Pipelines
Cloud Engineer
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System Design
•
medium
Design a centralized logging and telemetry system for a fleet of 10,000 edge nodes. The nodes have intermittent internet connectivity.
#Observability
#Edge Computing
#Data Pipelines
Cloud Engineer
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System Design
•
hard
Design a multi-region, active-active architecture for a highly available data ingestion API that processes millions of events per minute.
#High Availability
#Load Balancing
#Data Ingestion
#Distributed Systems
Data Engineer
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System Design
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hard
Design an architecture for a real-time anomaly detection system for financial transactions to prevent fraud. The system must evaluate rules against a graph of known bad actors within 50 milliseconds.
#Real-time Processing
#Graph Databases
#Low Latency
Data Engineer
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System Design
•
hard
Design an Entity Resolution system. You are ingesting millions of records from different government databases (e.g., DMV, Tax, Census). How do you design a pipeline to identify and merge records belonging to the same individual?
#Entity Resolution
#Data Pipelines
#Machine Learning
#Graph Processing
Data Engineer
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System Design
•
hard
Design a data ingestion pipeline for high-frequency IoT sensor data coming from manufacturing plants. The data needs to be available for real-time anomaly detection and also stored for batch historical analysis.
#Streaming
#Lambda/Kappa Architecture
#Kafka
#Data Lake
Data Engineer
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System Design
•
hard
Design a system to track data lineage across thousands of transformations. If a column in a source table is dropped, the system should instantly identify all downstream dashboards and datasets that will break.
#Metadata Management
#Graph Databases
#Data Lineage
Data Engineer
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System Design
•
hard
Design a strict data access control system (Row and Column level security) for a government client where data visibility depends on the user's security clearance and geographic location.
#Security
#Access Control
#Data Governance
Data Engineer
•
System Design
•
hard
Design a distributed task scheduler similar to Apache Airflow or Palantir's Build system. It needs to execute thousands of interdependent data jobs across a cluster of machines.
#Distributed Systems
#Scheduling
#DAGs
Data Engineer
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System Design
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medium
Design a rate limiter for an API that ingests data from external client systems. The system must handle sudden spikes in traffic without dropping critical data.
#Rate Limiting
#API Design
#Distributed Systems
DevOps Engineer
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System Design
•
medium
How would you architect a disaster recovery plan for a mission-critical PostgreSQL database cluster?
#Databases
#Disaster Recovery
#High Availability
DevOps Engineer
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System Design
•
hard
Design an auto-scaling architecture for a Palantir Foundry data ingestion service that experiences sudden, unpredictable 100x traffic spikes.
#Auto-scaling
#AWS
#Queuing
#System Design
DevOps Engineer
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System Design
•
medium
Design an automated CI/CD pipeline for deploying infrastructure changes to a highly secure, restricted environment.
#CI/CD
#Security
#Infrastructure as Code
DevOps Engineer
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System Design
•
hard
Design a system to securely and reliably transfer 50TB of sensitive data from an on-premise government facility to an AWS GovCloud environment.
#Data Transfer
#AWS
#Security
#Networking
DevOps Engineer
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System Design
•
hard
Design a centralized logging and telemetry system for a globally distributed platform operating across multiple cloud providers and on-prem data centers.
#Logging
#Observability
#Distributed Systems
DevOps Engineer
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System Design
•
hard
Design a highly available, multi-region Kubernetes architecture for Palantir's Apollo platform that can survive a complete AWS region failure.
#Kubernetes
#AWS
#High Availability
#Disaster Recovery
Frontend Engineer
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System Design
•
hard
Design an ontology builder UI where users can define complex relationships between different data types. The schema can be infinitely nested.
#Recursion
#State Management
#Complex UI
#Data Modeling
Frontend Engineer
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System Design
•
hard
Design a data grid component capable of handling 1 million rows of telemetry data, similar to what you might see in Palantir Foundry. How do you handle rendering, scrolling, and memory management?
#Virtualization
#Performance
#React
#Memory Management
Frontend Engineer
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System Design
•
hard
Design a node-link graph visualization tool for fraud detection (similar to Palantir Gotham). Users need to pan, zoom, and interact with up to 50,000 nodes. Walk me through your architecture.
#Canvas
#WebGL
#Data Visualization
#Interaction Design
Frontend Engineer
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System Design
•
medium
Design a real-time collaborative dashboard for tracking moving assets on a map. How do you handle high-frequency location updates without freezing the UI?
#WebSockets
#Real-time Data
#Rendering Optimization
#Concurrency
Frontend Engineer
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System Design
•
medium
Design a complex filtering component that allows users to build nested AND/OR conditions for querying large datasets.
#Component Architecture
#State Management
#UX/UI
Frontend Engineer
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System Design
•
hard
Design a secure document viewer that prevents data exfiltration. Requirements include dynamic watermarking, disabled copy/paste, and rendering redacted text.
#Security
#DOM Manipulation
#Browser APIs
Frontend Engineer
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System Design
•
medium
Design a time-series chart component that updates at 60fps with streaming sensor data. How do you ensure the main thread isn't blocked?
#Performance
#Canvas
#Web Workers
Frontend Engineer
•
System Design
•
hard
Design a frontend architecture for a micro-frontend based platform, similar to Foundry's workspace, where different teams deploy independent applications into a single shell.
#Micro-frontends
#Webpack Module Federation
#Architecture
#Routing
Frontend Engineer
•
System Design
•
medium
Design an offline-first web application for field operatives to input intelligence data. How do you handle synchronization and conflict resolution when they come back online?
#Service Workers
#IndexedDB
#Offline-first
#Sync Logic
Frontend Engineer
•
System Design
•
medium
Design a Role-Based Access Control (RBAC) UI that handles thousands of users, groups, and granular resource permissions.
#UI/UX
#State Management
#Pagination
#Security
Full Stack Engineer
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System Design
•
hard
Design a system to sync data between a disconnected edge device (e.g., a submarine or aircraft) and the central cloud once connectivity is restored.
#Edge Computing
#Data Synchronization
#Conflict Resolution
Full Stack Engineer
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System Design
•
medium
Design a distributed job scheduler for data pipelines in Palantir Foundry. It must handle job dependencies, retries, and worker node failures.
#Distributed Systems
#Task Queues
#Fault Tolerance
Full Stack Engineer
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System Design
•
hard
Design a system to ingest, process, and query millions of flight telemetry events per second. The system needs to support real-time alerting and historical analysis.
#Streaming
#Big Data
#Databases
#Scalability
Full Stack Engineer
•
System Design
•
medium
Design a distributed rate limiter for Palantir's API gateway that can handle millions of requests per second across multiple global data centers.
#Distributed Systems
#Caching
#Concurrency
Full Stack Engineer
•
System Design
•
hard
Design a real-time collaborative dashboard (similar to Palantir Foundry's Contour). Users should be able to edit charts and see changes from other users instantly.
#WebSockets
#Operational Transformation
#CRDTs
#Frontend Architecture
Full Stack Engineer
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System Design
•
hard
Design an access control system (RBAC/ABAC) for highly sensitive government data. How do you ensure that a user only sees the rows and columns they are explicitly cleared for?
#Security
#Database Design
#Microservices
Full Stack Engineer
•
System Design
•
hard
Design a log aggregation and search system capable of ingesting petabytes of logs from distributed Palantir Apollo nodes and allowing full-text search.
#Search Engines
#Distributed Systems
#Storage
Machine Learning Engineer
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System Design
•
hard
Design a machine learning deployment platform that can operate in strictly air-gapped environments with no internet access.
#Deployment
#Security
#Infrastructure
Machine Learning Engineer
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System Design
•
hard
Design a distributed graph processing pipeline to continuously update entity resolution models as new intelligence data arrives.
#Graph Databases
#Entity Resolution
#Data Pipelines
Machine Learning Engineer
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System Design
•
medium
Design an alerting system that monitors thousands of predictive maintenance models and notifies engineers when equipment failure probability exceeds a threshold.
#Monitoring
#Event-Driven Architecture
#Scalability
Machine Learning Engineer
•
System Design
•
hard
Design a Retrieval-Augmented Generation (RAG) system over a corpus of highly classified documents, where users have different row-level access permissions.
#NLP
#Security
#Search
Machine Learning Engineer
•
System Design
•
hard
Design a scalable system to ingest, process, and run computer vision models on daily satellite imagery updates for global supply chain monitoring.
#Computer Vision
#Distributed Systems
#Batch Processing
Machine Learning Engineer
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System Design
•
medium
Design a feature store capable of serving both high-throughput batch training and low-latency real-time inference.
#Databases
#Data Pipelines
#MLOps
Machine Learning Engineer
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System Design
•
medium
Design a system to track data provenance and model lineage so that if a data source is corrupted, we can identify all affected downstream ML models.
#Data Governance
#DAGs
#Metadata Management
Machine Learning Engineer
•
System Design
•
hard
Design a real-time anomaly detection system for a massive stream of financial transactions, ensuring sub-second latency.
#Stream Processing
#Machine Learning
#Scalability
Product Manager
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System Design
•
medium
Design a system to detect fraudulent transactions in real-time for a major retail bank using Foundry's ontology and streaming capabilities.
#Real-time Processing
#Fraud Detection
#Machine Learning Ops
Product Manager
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System Design
•
hard
How would you architect a solution to synchronize critical operational data between a highly secure, air-gapped military network and a lower-security commercial cloud environment?
#Security
#Network Architecture
#Data Synchronization
Product Manager
•
System Design
•
hard
Design a distributed alerting system for Palantir Apollo that monitors the health of thousands of microservices across multiple cloud and air-gapped on-prem environments.
#Distributed Systems
#Monitoring
#Apollo
#Air-gapped Networks
Product Manager
•
System Design
•
hard
Design a system to track and trace supply chain disruptions in real-time for a global manufacturing company, integrating data from ERPs, shipping manifests, and external news feeds.
#Data Pipelines
#Real-time Processing
#Ontology
#Supply Chain
Product Manager
•
System Design
•
hard
Design an access control and data governance system for a government intelligence agency where data visibility depends on user clearance level, data classification, and the user's current mission context.
#Security
#Access Control
#Data Governance
#Architecture
Product Manager
•
System Design
•
hard
Design a data pipeline to ingest 10TB of daily log data from IoT devices on offshore oil rigs with intermittent, low-bandwidth satellite connectivity.
#Edge Computing
#Data Ingestion
#Bandwidth Constraints
Product Manager
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System Design
•
medium
Explain how you would design a schema/ontology for a hospital network to predict patient readmissions, integrating EHR, billing, and demographic data.
#Ontology
#Healthcare
#Data Modeling
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