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Akamai System Design Interview: Complete Preparation Guide

Prepare for Akamai's system design interview with CDN-focused questions, evaluation criteria, expert tips, and a weekly prep roadmap.

22 minUpdated Apr 25, 2026
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Interview format

4 rounds total.

System Design60 min

Design a globally distributed content delivery or security system. Akamai expects deep understanding of CDN architecture, caching hierarchies, and edge computing.

Coding45 min

Algorithm and data structure problem, often involving graph algorithms, caching strategies, or network optimization.

Technical Discussion45 min

Deep dive into networking, distributed systems, or content delivery. Discuss past experience with large-scale infrastructure.

Behavioral45 min

Culture and collaboration assessment, including how you handle complex technical challenges and work cross-functionally.

Commonly asked systems

Design a global CDN with multi-tier caching hierarchyDesign a video streaming delivery platform with adaptive bitrateDesign a web application firewall deployed at edgeDesign a DNS-based global traffic management systemDesign an edge computing platform for serverless workloadsDesign a DDoS protection system for enterprise customersDesign a real-time analytics platform for CDN traffic

What they evaluate

CDN & Caching ExpertiseHigh

Akamai invented the CDN. Demonstrate mastery of caching hierarchies, cache invalidation, origin shielding, and content optimization.

Networking DepthHigh

Show deep understanding of DNS, HTTP, TCP optimization, TLS, and how network protocols affect content delivery performance.

Global Scale ArchitectureHigh

Akamai has 350K+ servers in 130+ countries. Design for truly global scale with regional considerations.

Performance OptimizationMedium-High

Every millisecond of page load time matters. Discuss techniques like prefetching, connection pooling, and protocol optimization.

ReliabilityMedium

CDN infrastructure must be highly available. Discuss failover, redundancy, and origin health monitoring.

Tips

  • ▸Understand CDN caching hierarchies in depth: edge, mid-tier, origin shield, and when content cascades through each layer
  • ▸Study cache invalidation strategies: TTL-based, tag-based purge, instant purge, and their consistency trade-offs
  • ▸Know video delivery: adaptive bitrate streaming (HLS, DASH), chunk-based delivery, and how CDNs optimize video
  • ▸Be familiar with TCP optimization techniques: window scaling, congestion control algorithms, connection reuse
  • ▸Study how DNS is used for global traffic management, latency-based routing, and failover
  • ▸Understand the difference between push and pull CDN models and when each is appropriate
  • ▸Prepare to discuss edge compute and how moving logic closer to users reduces latency

Preparation roadmap

Week 1-2CDN & Networking Foundations
  • ·Study CDN architecture: caching tiers, origin shielding, content routing
  • ·Review HTTP caching headers, cache-control directives, and ETags
  • ·Learn DNS-based traffic management and anycast routing
Week 3-4Core Delivery Systems
  • ·Design a global CDN with multi-tier caching and intelligent purge
  • ·Design a video streaming delivery platform with adaptive bitrate
  • ·Design a DNS-based global traffic management system
Week 5-6Security & Edge Computing
  • ·Design a WAF deployed at CDN edge scale
  • ·Design a DDoS mitigation system for enterprise customers
  • ·Study edge computing platforms and serverless at the edge
Week 7-8Mock Interviews & Polish
  • ·Complete 4+ mock system design interviews focused on CDN and delivery
  • ·Practice explaining caching hierarchies and cache invalidation strategies
  • ·Review Akamai's technical publications and State of the Internet reports
  • ·Prepare behavioral stories about optimizing global-scale infrastructure
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