Principal AWS Platform Engineer (Permanent) South London | Predominantly Remote £120000 - £130000 PA + benefits Clearance Requirements Due to the nature of the work, candidates must either hold UK security clearance or be eligible to obtain it (British passport holder with a minimum of five years'' UK residency). Role Overview A permanent opportunity has opened for an experienced Principal AWS Platform Engineer to join a UK-based technology organisation delivering secure, large-scale cloud platforms within highly regulated environments. This role suits a senior engineer who enjoys shaping cloud strategy, setting engineering standards, and remaining hands-on with complex AWS infrastructure. You''ll play a key part in designing platforms that are secure by default, highly automated, and built to scale, while influencing how cloud services are delivered across the organisation. What You''ll Be Responsible For In this role, you''ll take ownership of AWS platform design and continuous improvement, working across multi-account environments and enterprise-scale architectures. You''ll be involved in: Defining and evolving AWS platform architecture using AWS Organizations and modern Landing Zone patterns Implementing and maintaining Infrastructure as Code using tools such as Terraform, CloudFormation, and AWS CDK Embedding security, compliance, and monitoring into cloud platforms through native AWS services Enabling automated delivery through well-designed CI/CD pipelines and self-se