Rohan Kumar

Experience

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  Advisor

  Jun 2014 - Sept 2017

  Linux System Administrator

  • Involved in Installing, configuring, supporting and troubleshooting Unix/Linux Networking services and protocols like NIS, LDAP, DNS, NFS, DHCP, NAS, FTP, SSH and SAMBA.• Experience in writing basic Shell scripts using bash for applications, backup and scheduling.• Troubleshooting OS / Hardware related issues and monitor server health on a day-to-day basis.• Worked with the virtual build, installation, configuration, and maintenance of Linux RedHat both locally or over network.• Install, configure, maintain, and troubleshoot enterprise-wide Apache web servers and Tomcat application containers in a large RedHat Linux/CentOS environment.• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.• Working on volume management, disk management using logical volume manager. Performed collaborative root cause analysis to resolve software and network issues in production.• Applying OS patch and upgrade in a multi-platform (RedHat/CentOS) environment on a regular scheduled basis.• Hardened various Linux RedHat 6 Servers utilizing security policies and CIS Security Benchmark based template.• Collaborated with Network Admin in Installing, configuring, securing, and implementing slave replication on DNS BIND servers. Installed, updated, and configured the necessary packages using the RPM and YUM software/package management. Show less

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  Citi

  Oct 2017 - Sept 2018

  DevOps Engineer

  • Experience in Automating, Configuring and deploying instances on AWS and Azure Cloud environments.• Designed AWS Cloud Formation templates to create custom sized VPC, subnets, NAT to ensure successful deployment of Web applications and database templates.• Created recommendations on how to duplicate a subset of on-premise machines to the Azure Infrastructure as a Service (IAAS) offering which will be used for disaster recovery. This analysis included the specifics to synchronize on-premise data with SQL Server and SharePoint instances hosted in VMs.• Worked on Azure Site Recovery and Azure Backup- Deployed Instances on Azure environments and in Data centers and migrating to Azure using Azure Site Recovery and collecting data from all Azure Resources using Log Analytics and analyzed the data to resolve issues.• Setup and Implement Continuous Integration and Continuous Delivery (CI & CD) Process stack using AWS, GITHUB/GIT, Jenkins and Puppet• Worked on google cloud platform (GCP) services like compute engine, cloud load balancing, cloud storage, cloud SQL, stack driver monitoring and cloud deployment manager.• Setup GCP Firewall rules to allow or deny traffic to and from the VM's instances based on specified configuration and used GCP cloud CDN (content delivery network) to deliver content from GCP cache locations drastically improving user experience and latency.• Aggregated logs from Stack Driver and monitored pod and node health by creating metric based dashboards on GCP.• Integrated Jenkins/Helm/Kubernetes/Vault with GCP to perform semi-automated and automated releases to lower and production environments.• Worked on Serverless services, created and configured HTTP Triggers in the Azure Functions with application insights for monitoring and performing load testing on the applications using the Visual Studio Team Services (VSTS) also called as Azure DevOps Services. Show less

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  PayPal

  Jan 2019 - May 2023

  Sr. DevOps Engineer

  Creating build,deployment and functional test ECD pipeline using Jenkins,Maven for different application stacks.Experienced in Bug/Issue Tracking tool like JIRAImplementing a CI/CD pipeline involving GitHub, Jenkins, and Docker for complete automation from commit to deployment.Experience working with version control system like GIT and used Source code management tools GitHub, Gitbash including command line applications.Integration of CI/CD Jenkins pipeline in the development projects. Debugging build failures, coordinating with developers and testers to resolve related issues.Creating Docker containers for the deployments of the application builds and doing analysis of the deployment issues.Enabled automated security scanning, that includes Dynamic and static Application Security scanners, Open-Source security scanners, container image security scanners helped multiple teams around PayPal to inculcate the Appsec team’s offering by integrating those tools seamlessly into their environment and customizing it to their needs. Show less

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  American Tire Distributors

  Jun 2023 - now

  Sr. DevOps Engineer

  • Automating the build and deployments for different platform specific applications from end-to-end on AWS EC2, EBS, S3, IAM, Route53, Lambda, SNS to reduce manual interventions for application teams in agile environment using DevOps strategies.• Developing the deployment & delivery pipelines in Jenkins and integrating it with • Developed environments of different applications on AWS by provisioning on EC2 instances configuring Terraform, Bash and Docker.• Set-up databases in GCP using RDS, storage using S3 bucket and configuring instance backups to S3 bucket. prototype CI/CD system with GitLab on GKE utilizing kubernetes and Docker for the runtime environment for the CI/CD systems to build and test and deploy.• • Created AWS Instances, Instance Groups, AWS IAM and Security Groups in Public and Private Subnets in VPC.• Configured multiple Elastic Load Balancers (ELB) with EC2 Auto Scaling Groups for high availability; fault tolerant Docker containers in ECS.• Used Chef for configuration management of hosted Instances within GCP. Configuring and Networking of Virtual Private Cloud (VPC).• • Experience with Terraform to build infrastructure as a code. Created multiple highly available ECS clusters and deployed multiple services into clusters configuring Terraform Scripts. Developed Terraform Scripts to automate the infrastructure deployment.• Developed automated provisioning applications according to organizational standards for deployment to AWS environment. Show less