HR Screening Round Questions What do you know about the company Circles based on the job description and company profile? Can you explain what you know about Circles and its business focus? Tell me about your experience managing infrastructure in your previous and current roles. What exactly are your responsibilities in your current role? Can you describe a project where you personally designed or owned the end-to-end AWS infrastructure? What were the key architectural decisions you made while designing the product? How would you design the networking layer for a new production application on AWS? How would you design the security architecture for a production application deployed from scratch on AWS? When would you choose a Multi-AZ deployment? Would your Multi-AZ strategy differ for local versus global products? How would you investigate a sudden increase in application latency when EC2 servers appear healthy? What monitoring tools do you use to identify latency or performance issues? How have you identified and resolved performance bottlenecks in a production application? Are you currently using any AI tools in infrastructure, DevOps, or SRE operations? If traffic suddenly increased to 1 million users, how would your system automatically scale? What would likely become the bottleneck first in such a scenario? How would you monitor system health during a massive traffic spike? What AWS services would you use to ensure high availability and scalability?