Excellent AWS DevOps Engineer Interview with Feedback | Infosys | Cloud | CICD | Cost Optimizations

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Summary:
Harish is a DevOps engineer with 2.5 years of experience at Capgemini, currently working on a US-based network communication project involving microservices and OLT/ONT devices.

His role focuses on AWS services (EC2, VPC, S3, IAM), GitHub, Docker, Jenkins pipelines, and Ansible, but he has only worked on one project so far.

The CI/CD pipeline uses Jenkins with multi-branch strategies, SonarQube for code scanning, Docker/ECR for container management, and EKS Fargate for deployments.

He lacks experience in production deployments, cost optimization (e.g., reducing Fargate costs), and database scaling (e.g., RDS scaling strategies).

He explained basic AWS networking (public/private subnets, NAT gateways, Bastion hosts) but wasn’t aware of alternatives like SSM Session Manager for accessing private instances.

Security practices he has worked with include IAM policies, S3 bucket policies, MFA, and NACLs, but he hasn’t used WAF or implemented security tools in pipelines beyond SonarQube.

He understands AWS Lambda conceptually (e.g., automating cleanup of unused resources) but has never built or deployed a Lambda function himself.

For high availability, he described multi-AZ deployments but didn’t discuss auto-scaling policies or disaster recovery in depth.

The interviewer noted that Harish has a good grasp of what he’s worked on but struggles with broader problem-solving, consulting scenarios, and unfamiliar AWS services.

Recommendations included pursuing AWS/Terraform/Kubernetes certifications, experimenting with personal projects, and learning cost optimization and scaling strategies.

Harish acknowledged the feedback and agreed to upskill, particularly in areas like consulting, multi-environment deployments, and hands-on serverless implementation.


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