The most expensive infrastructure problems we have ever seen were caused by someone clicking through the AWS console and not writing down what they did. Six months later, nobody can reproduce the environment, the staging server does not match production, and the on-call engineer is reading CloudFormation documentation at midnight. We have a strict rule at Key Brains: if it is not in code, it does not exist.
Infrastructure as code
Every piece of infrastructure we provision is defined in Terraform. VPCs, subnets, security groups, IAM roles, RDS instances, ECS clusters, load balancers, CloudFront distributions, S3 buckets — all of it, in code, in version control, reviewed like application code. You can destroy the entire environment and rebuild it from scratch in twenty minutes. This is not a nice-to-have. It is a prerequisite for operating reliably at scale.
CI/CD pipelines
Every codebase we work on has a CI/CD pipeline from the first week. Tests run on every pull request. Deployments to staging are automatic on merge to main. Production deployments are one-click, auditable, and rollback-capable. We use GitHub Actions as our default, with AWS CodePipeline or Google Cloud Build when the client environment requires it.
Container orchestration
We containerise everything with Docker and orchestrate with ECS Fargate or Kubernetes depending on the scale and operational complexity of the workload. Fargate is right for most production applications — managed, auto-scaling, no nodes to patch. Kubernetes is right when you need advanced scheduling, custom operators, or are already operating a multi-tenant platform with complex networking requirements.
Monitoring and observability
A deployed application is not a finished application. We instrument every service with structured logging, distributed tracing, and metrics collection from day one. Our default stack is Datadog for APM and infrastructure monitoring, with PagerDuty or OpsGenie for alerting. We configure meaningful alerts — not alert storms — and document runbooks for every alert that fires.
Security and compliance
We implement least-privilege IAM policies, encrypt data at rest and in transit, rotate secrets with AWS Secrets Manager or HashiCorp Vault, and conduct quarterly access reviews. For clients with SOC 2 or ISO 27001 requirements, we can provide the infrastructure evidence package and work directly with your auditors.
Cost optimisation
Cloud bills that grow faster than revenue are a product failure, not an infrastructure success. We size instances correctly from the beginning, implement auto-scaling policies based on real load profiles, use reserved instances or savings plans for predictable workloads, and conduct monthly cost reviews to identify and eliminate waste.