Senior Site Reliability Engineer – Cloudflare & Acquia CMS

About the role

We are looking for a Senior Site Reliability Engineer to ensure the reliability, performance, scalability, and security of a high‑traffic, enterprise‑scale Acquia (Drupal) web platform. The role focuses on assessing the current infrastructure, delivery pipelines, and caching layers (Cloudflare, Varnish, Memcached) and delivering actionable optimisation road‑maps.

Key responsibilities

• Evaluate and document the existing architecture, including integration between Cloudflare, Varnish, Memcached, and Acquia hosting.
• Analyse cache‑hit ratios at Cloudflare and Varnish, identify uncacheable components and propose improvements.
• Compare configurations against Drupal, Acquia and industry SRE best practices, producing remediation plans.
• Maintain and optimise the end‑to‑end caching pipeline (Cloudflare Edge → Varnish → Memcached → Drupal) to reduce origin load.
• Implement robust cache‑invalidation strategies using Drupal Cache Tags, acquia_purge and Cloudflare API.
• Author and tune VCL files for custom headers, redirects and bypass rules.
• Set up monitoring, logging and alerting dashboards across Acquia logs, Varnish logs, Cloudflare Analytics and APM tools (New Relic, Datadog).
• Participate in incident response, diagnose production bottlenecks and conduct post‑incident reviews.

Required profile

• Minimum 3 years experience auditing complex web architectures and translating findings into technical backlogs.
• Hands‑on experience with the Acquia Cloud ecosystem.
• Strong understanding of Varnish caching, VCL scripting and Memcached configuration.
• Proficiency in Cloudflare configuration and API usage.
• English proficiency at B2 level or higher.

Required skills

• Acquia Cloud
• Varnish and VCL scripting
• Memcached
• Cloudflare configuration and API
• New Relic or Datadog APM
• Apache/Nginx and Varnishncsa log analysis
• Drupal (enterprise‑grade) fundamentals