Robert Polasek, ShellScript Developer in Toronto, ON, Canada
Robert Polasek

ShellScript Developer in Toronto, ON, Canada

Member since May 21, 2018
Robert is a senior infrastructure and DevOps engineer with over 15 years of experience in Unix/Linux system administration, server automation, programming, development, storage area networks, networking, and security. In addition, for the past seven years, he has worked as a SAN administrator. Robert is extremely professional and joined Toptal to work on innovative projects with exceptional talents.
Robert is now available for hire

Portfolio

  • Stagwell Technologies
    Linux, Docker, Kubernetes, Terraform, Kops, Helm, Hortonworks Hadoop, Jenkins...
  • TD Bank
    OpenStack, TOSCA Blueprints, Jenkins, JBoss, Groovy
  • Bank of Montreal
    Puppet, Red Hat, Red Hat Satellite Server, VMware, WebSphere, JBoss

Experience

  • ShellScript, 20 years
  • Linux, 20 years
  • Jenkins, 5 years
  • Docker, 5 years
  • Terraform, 3 years
  • Puppet, 3 years
  • Kubernetes, 3 years
  • Chef, 3 years

Location

Toronto, ON, Canada

Availability

Part-time

Preferred Environment

Linux, Docker, Kubernetes, Jenkins, GitHub, AWS

The most amazing...

...thing I've designed and implemented was a Jenkins CI/CD pipeline using DSL and Groovy scripts.

Employment

  • DevOps Engineer

    2016 - PRESENT
    Stagwell Technologies
    • Built, deployed, and managed eight large Kubernetes clusters for development, user acceptance testing (UAT), and production environments with 25 nodes per cluster and load based horizontal autoscaling.
    • Implemented Jenkins as a continuous delivery tool using Groovy, DSL, pipelines, and Kubernetes running Jenkins slaves on demand.
    • Provisioned AWS and Azure services and resources using Terraform (EC2, EBS, S3, VPC, Auto Scaling, Cloud Formation, Elastic Load Balancing, RDS, Route 53, Memcache, Redis, OpsWorks, CloudWatch, CloudTrail, Identity and Access Management (IAM), SQS, Redshift, Lambda Functions, Beanstalk, Batch, Elastic Container Service, Fargate, and Firehose).
    • Migrated VMware servers into AWS and Azure Cloud, using VMware OVF and Hypervisor VHD images.
    • Designed Chef cookbooks to manage configurations and automate the installation process using the OpsWorks framework.
    • Deployed central logging to a Kibana server using Elasticsearch as a storage engine.
    • Built a central monitoring facility using Grafana and Prometheus.
    • Configured a Gluu IAM server as a user authentication gateway for Kubernetes using OpenID.
    • Built a NeoDB database for all the resources in AWS, all the repositories in GitHub, all jobs in Jenkins, and all containers in Kubernetes and their relationships with continuous updates using Mercator code as a framework.
    Technologies: Linux, Docker, Kubernetes, Terraform, Kops, Helm, Hortonworks Hadoop, Jenkins, Elasticsearch, Vault by HashiCorp, Packer, AWS, Azure, Chef, OpenID Connect
  • DevOps Engineer

    2017 - 2017
    TD Bank
    • Developed TOSCA blueprints and also deployed them to OpenStack.
    • Built Jenkins CI/CD pipelines in Groovy to automate code releases and updates of Confluence pages through a REST API.
    • Wrote Python scripts to interact with APIs for automated deployments.
    • Created a JBoss blueprint; also installed, configured and troubleshot JBoss.
    Technologies: OpenStack, TOSCA Blueprints, Jenkins, JBoss, Groovy
  • DevOps Consultant/Architect

    2014 - 2016
    Bank of Montreal
    • Designed, deployed, and configured Red Hat Satellite Server 6 (RHS6) and migrated 670 servers from RHS5 to RHS6.
    • Designed and built a Puppet infrastructure for configuration management of 700+ servers.
    • Created provisioning processes utilizing RHS6 with Puppet and coded supporting build classes and facts.
    • Managed Solaris and Red Hat enterprise servers (700+ servers).
    • Performed a difficult root cause analysis and debugged problems on the level of system library calls.
    Technologies: Puppet, Red Hat, Red Hat Satellite Server, VMware, WebSphere, JBoss
  • Senior Consultant

    2011 - 2013
    Resmor Trust (Royal Bank of Canada)
    • Managed RHEL Linux servers, Hitachi modular storage, Hitachi Virtual Storage Platform (VSP), Brocade FC switches, VMware ESX servers, and F5 load balancers.
    • Designed, installed, and configured Hitachi AMS 2300 and associated SAN components.
    • Built a Kickstart server for automated Linux builds with a PXE boot.
    • Designed and implemented the encapsulation of Oracle RAC cluster into a Linux HA cluster ensuring high availability of all Oracle failover components and ETL applications.
    • Migrated Oracle RAC 11G to a new storage frame.
    Technologies: Red Hat, VMware, Hitachi Storage Array, CFEngine
  • Senior Unix/SAN Consultant

    2009 - 2011
    Intria Items | CIBC
    • Managed Solaris, HP-UX, AIX, and Linux servers (200+ servers).
    • Planned and executed a physical storage migration (25 terabytes) from Montreal to Markham with minimal downtime.
    • Worked on the application design and implementation using virtualization technologies as LDOMs, Solaris zones, and HP VMware.
    • Managed and implemented improvements to cluster technologies such as HP ServiceGuard and Veritas cluster server.
    Technologies: Solaris, AIX, HP-UX, Linux, IBM SAN Storage, Brocade FC Switches, LDOMs, Solaris Zones, HP VMware

Experience

  • A Jenkins Automated Job Creation Framework with Kubernetes Containers as Slaves (Development)

    I designed, coded, and maintained a Jenkins job creation framework using Groovy, DSL, and Jenkins pipelines. The framework allowed easy configuration and deployment of new jobs as well as fast bulk changes of existing jobs. The pipeline incorporated Hashicorp vault as a central secure storage to be used for Jenkins configuration and job builds. Kubernetes containers were used as slaves for builds, where each step of a build process was defined as a docker image, allowing us to easily build on the same source code using different tools or ensure that the versions remain same through the lifecycle of the product.

Skills

  • Tools

    Chef, Puppet, Jenkins, Veritas Cluster Server, Terraform, Kibana, Grafana, VMware
  • Platforms

    Docker, Linux, Kubernetes, Solaris, AIX, HP-UX, Oracle, Azure
  • Other

    Kubernetes Operations (Kops), ShellScript, SCM Engineer, Cloud, Networks, Groovy Scripting
  • Languages

    Java, Perl, C, Python, HTML
  • Frameworks

    Hadoop
  • Libraries/APIs

    Jenkins Job DSL
  • Storage

    MySQL, PostgreSQL, Elasticsearch, Cassandra

Education

  • Master's degree in Computers and Electronics
    1989 - 1994
    Brno University of Technology, Department of Computers and Electronics - Brno, Czech Republic
Certifications
  • Hitachi Data Systems Certified Professional
    JANUARY 2012 - PRESENT
    Hitachi
  • Sun Solaris 10 Certified System Administrator
    JANUARY 2008 - PRESENT
    Sun Microsystems
  • Oracle Certified Professional
    JANUARY 2004 - PRESENT
    Oracle
  • Sun Solaris 9 Certified System Administrator
    JANUARY 2004 - PRESENT
    Sun Microsystems
  • HP-UX 11 Certified System Administrator
    JANUARY 2003 - PRESENT
    Hewlett-Packard
  • Check Point Firewall I Administrator
    JANUARY 1999 - PRESENT
    Check Point
  • HP-UX 10.20 Certified System Administrator
    JANUARY 1998 - PRESENT
    Hewlett-Packard

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