Model large, complex systems on top of modern cloud utilizing tools like Docker, Kubernetes and Helm, so that they are performant, cost-effective, scalable, and possibly without platform lock-in.
Practice Configuration as Code when creating all the infrastructure using Terraform, Ansible and GitOps tools like FluxCD.
Deploy extensive monitoring and alerting on application and infrastructure level to ensure near-100% uptime.
Design secure infrastructure by practicing the Principle of Least Privilege.
Ensure that the application code and data are protected from internal and external agents as well as human errors.
Learn, practice and master the DevSecOps mindset yourself, and help others level up in the same.