A cloud engineer is responsible for designing, implementing, and managing cloud infrastructure and services. They work with cloud platforms like AWS, Azure, or Google Cloud to deploy and maintain scalable, secure, and highly available applications and systems. Cloud engineers have expertise in cloud architecture, infrastructure as code (IaC), and automation tools. They configure virtual machines, set up networking and security, and manage cloud storage and databases. Cloud engineers also monitor performance, troubleshoot issues, and optimize cloud resources for cost-efficiency.