Robert Polasek
Devops Sre Consultant @Blue River Technology
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WORK HISTORY
Devops Sre Consultant @Blue River Technology
Managed resources in AWS cloud. The enterprise environment consisted of dedicated CI/CD and application environments, all of the set up in separate AWS accounts, ensuring a separation between CICD and application accounts. Set up cross-account IAM roles and policies, created and updated AWS resources as EKS, ECS, Kinesis, Fargate, Lambda functions, Transit gateways, IAM roles and policies, Athena and others. • Upgraded all EKS clusters from version 1.18 to version 1.21, without disruption of service. Performed analysis of containers that would be impacted by the rollout. Checked for the containers dependent on local storage, single replica containers, containers created as PODs. Managed Kubernetes cluster node pools with multi type CPU/GPU instances used for machine learning jobs. • Upgraded all CI/CD pipelines terraform version to 1.2.4, updated states outside of CI/CD, performed state file manipulations required to return the job back to the automated CI/CD pipeline. Updated RDS instance of Mysql to version 8 and performed related state manipulations. • Built and updated helm charts used for internal applications as well as external helm charts. Managed Kustomize code used by Kubeflow. • Created a complete Terraform/Terragrunt IaaC code for Databricks ecosystem. Code was divided into individual modules that were deployed by Terragrunt either on Databricks account level or Databricks workspace level. Debugged notebook problems in Databricks environments. • Built Jenkins CI/CD pipeline to built and deploy one of the internal applications. Utilized technologies like Kaniko to avoid security issues when using DockerInDocker. • Built Github actions using reusable pipeline code blocks. • Performed troubleshooting of hanging, or unexpectedly failing Kubeflow jobs, worked with users on fixes. • Introduced API key rotation by extending the application API for one of the key inhouse application written in Python.
EDUCATION
Technical University, Brno, Czech Republic
Master, Electrical and Electronics Engineering
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