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A properly configured Cloudflare CDN can dramatically reduce origin server load and cut page load times for users across Europe and globally. Out of the box, Cloudflare caches static assets — images, CSS, JavaScript, fonts — at its 300+ edge nodes. But the real performance gains come from fine-tuned cache configuration that Hellenic Technologies implements for each client based on their specific stack and content patterns. Cache Rules (the successor to Page Rules) give granular control over what gets cached, for how long, and under what conditions. We configure cache-control header overrides for assets that applications serve with incorrect headers, set up edge TTLs that differ from browser TTLs for maximum CDN offload, and implement cache bypass rules for authenticated routes and API endpoints. For high-traffic sites, Tiered Cache routes requests through a smaller set of upper-tier PoPs before hitting origin, reducing cache misses and origin egress costs. Cache purge automation is critical for content freshness. We integrate Cloudflare’s cache purge API into deployment pipelines so that a production deploy automatically purges affected cached assets. For more complex invalidation requirements, we implement tag-based cache purging using Cloudflare Cache Tags, allowing surgical purges of related content groups without flushing the entire cache. CDN configuration services:
  • Cache Rule configuration for static assets, HTML pages, and API routes
  • Edge TTL and browser TTL tuning per content type
  • Tiered Cache (Argo Tiered Cache) setup for high-traffic properties
  • Cache purge integration into CI/CD pipelines via Cloudflare API
  • Cache Tag implementation for surgical content invalidation
  • Polish (image compression) and Mirage (mobile image optimisation) configuration
  • Early Hints (103 responses) for improved LCP scores
  • Cache hit ratio monitoring and optimisation recommendations
  • Bypass rules for admin areas, checkout flows, and authenticated sessions