Sergiu Vrancean

Devops Engineer Site Reliability Engineer @Delta Air Lines

Worked closely with software development and testing team members to design and develop robustsolutions to meet company requirements for functionality, scalability and performance.•Developed and maintained Terraform modules for cloud infrastructures utilizing Amazon Web Services (AWS) like VPC, Subnets, Security Groups, EC2 instances, Route53, ELB, S3, EBS, EKS•Implemented Docker based Microservices deployments by using Helm Charts.•Created and managed Kubernetes clusters with Terraform ensuring smooth deployment and management of containerized applications.•Defined configuration baselines and implemented Rego policies to enforce OPA Gatekeepr security policies•Enforced SonarCloud to the CI/CD pipeline for code analysis facilitating detection of coding issues and security vulnerabilities.•Provided multiple stable AWS EKS environment for deployment for Development, Test and Production teams.•Applied and configured ExternalDNS for Kubernetes cluster to automate AWS Route53 DNS configuration.•Created and maintained fully automated Continuous Integration, Continuous Delivery, and Continuous Deployment pipelines in multiple environments using GitHub Actions/Gitlab CI/CD.•Provided direct support during deployment and general production operations.•Deployed essential Kubernetes services like Ingress, StatefulSets, Services, NetworkPolicies and ConfigMaps, enabling efficient networking and persistent storage•Monitored application services using Grafana, Prometheus and Datadog to collect and analyze logs and metrics and created alerts based on nodes, pods, services from Kubernetes clusters, enabling effective performance monitoring and analysis.•Implemented ArgoCD to the CI/CD pipeline to enforce GitOps best practices.•Deployed and configured Hashicorp Vault on Kubernetes Clusters for secret and token management.•Continuously assess and improve infrastructure and processes to increase efficiency and reduce downtime.